RM38T0EC _51 Engine / Hybrid System _115233 STOP AND START _0510781 STOP AND START SYSTEM J

STOP AND START  STOP AND START SYSTEM  Starter Signal Circuit  


DESCRIPTION

The engine stop and start ECU uses its internal starter circuit to drive the starter drive relay (ST relay) and operate the starter.

WIRING DIAGRAM

A539555E01
6.042,0.635 6.5,0.833 0.458,0.198 10 false I230 6.438,0.625 6.896,0.823 0.458,0.198 10 false IGR 6.094,0.448 6.552,0.646 0.458,0.198 10 false 21 0.094,0.042 2.625,0.323 2.531,0.281 12 false w/ Smart Entry and Start System: 4.073,0.781 5.24,1 1.167,0.219 10 false ECU-IGR NO. 3 1.333,0.615 1.792,0.813 0.458,0.198 10 false 8B 1.354,1.906 1.813,2.104 0.458,0.198 10 false 8J 1.99,1.99 2.448,2.188 0.458,0.198 10 false IC 4.354,8.073 4.813,8.271 0.458,0.198 10 false ECM 6.406,4.604 6.865,4.802 0.458,0.198 10 false STA 6,8.177 7.156,8.594 1.156,0.417 10 false Engine Stop and Start ECU 6.021,4.604 6.479,4.802 0.458,0.198 10 false A169 4.042,3.104 5.167,3.531 1.125,0.427 10 false Power Distribution Box Assembly 4.073,1.74 5.219,1.969 1.146,0.229 10 false ECU-IGR NO. 1 1.969,0.771 2.427,0.969 0.458,0.198 10 false AM2 1.063,5.427 2.865,5.948 1.802,0.521 10 false Certification ECU (Smart Key ECU Assembly) 0.615,8.479 2.469,8.76 1.854,0.281 10 false : CAN Communication Line 0.177,7.865 0.333,8.094 0.156,0.229 10 false A 0.49,7.865 0.74,8.063 0.25,0.198 10 false B 6.052,7.542 6.51,7.74 0.458,0.198 10 false I230 6.406,7.542 6.865,7.74 0.458,0.198 10 false CANL 6.094,7.365 6.552,7.563 0.458,0.198 10 false 14 4.354,7.896 4.813,8.094 0.458,0.198 10 false A182 3.073,2.208 3.771,2.427 0.698,0.219 10 false IGR NO. 1 2.458,3.073 2.771,3.271 0.313,0.198 10 false 8E 3.01,3.073 3.323,3.271 0.313,0.198 10 false 8C 3.552,3.073 3.865,3.271 0.313,0.198 10 false 8B 5.271,0.625 5.583,0.823 0.313,0.198 10 false 8B 5.271,1.583 5.583,1.781 0.313,0.198 10 false 8E 5.271,2.115 5.583,2.313 0.313,0.198 10 false 8B 5.26,2.625 5.573,2.823 0.313,0.198 10 false 8C 1.49,4.01 1.802,4.208 0.313,0.198 10 false +B 2.031,3.823 2.438,4.063 0.406,0.24 10 false IGPD 2.042,4.219 2.656,4.417 0.615,0.198 10 false IGRD 2.01,4.625 2.625,4.823 0.615,0.198 10 false STAR 2.104,5.01 2.563,5.208 0.458,0.198 10 false STA 4.667,7.167 5.281,7.365 0.615,0.198 10 false CANH 4.698,7.542 5.313,7.74 0.615,0.198 10 false CANL 6.406,7.177 7.021,7.375 0.615,0.198 10 false CANH 4.792,6.854 5.25,7.052 0.458,0.198 10 false IGR 3.969,6.99 4.427,7.188 0.458,0.198 10 false STA 3.958,7.385 4.417,7.583 0.458,0.198 10 false IGP 6.052,7.167 6.667,7.365 0.615,0.198 10 false I230 6.104,6.969 6.417,7.167 0.313,0.198 10 false 13 6.104,4.427 6.417,4.625 0.313,0.198 10 false 21 2.521,3.813 3.135,4.01 0.615,0.198 10 false I223 2.521,4.208 3.021,4.375 0.5,0.167 10 false I223 1.125,4.021 1.74,4.219 0.615,0.198 10 false I222 2.51,4.615 3.125,4.813 0.615,0.198 10 false I223 2.521,5.01 3.135,5.208 0.615,0.198 10 false I223 2.865,3.25 3.177,3.448 0.313,0.198 10 false 17 3.396,3.25 3.708,3.448 0.313,0.198 10 false 10 2.313,3.25 2.625,3.448 0.313,0.198 10 false 14 2.573,3.615 2.885,3.813 0.313,0.198 10 false 24 2.563,4.01 2.875,4.208 0.313,0.198 10 false 11 1.198,3.833 1.354,4.031 0.156,0.198 10 false 6 2.552,4.427 2.865,4.625 0.313,0.198 10 false 10 2.604,4.833 2.76,5.031 0.156,0.198 10 false 3 3.719,7.271 4.021,7.49 0.302,0.219 10 false 30 5.146,6.719 5.458,6.917 0.313,0.198 10 false 33 3.719,6.865 4.031,7.063 0.313,0.198 10 false 18 5.188,7.01 5.5,7.208 0.313,0.198 10 false 4 5.188,7.396 5.5,7.594 0.313,0.198 10 false 3 1.333,0.427 1.646,0.625 0.313,0.198 10 false 24 1.375,1.719 1.531,1.917 0.156,0.198 10 false 1 0.792,7.875 0.948,8.073 0.156,0.198 10 false C 3.021,7.865 3.177,8.063 0.156,0.198 10 false D 5.302,0.438 5.615,0.635 0.313,0.198 10 false 9 5.271,1.385 5.583,1.583 0.313,0.198 10 false 22 5.26,1.927 5.573,2.125 0.313,0.198 10 false 36 5.271,2.438 5.583,2.635 0.313,0.198 10 false 41 3.458,7.865 3.615,8.063 0.156,0.198 10 false E 1.344,1.281 1.802,1.479 0.458,0.198 10 false 8K 1.375,1.083 1.531,1.281 0.156,0.198 10 false 1 0.302,1.458 1.448,1.688 1.146,0.229 10 false INP STD NO. 3 3.969,6.604 4.583,6.802 0.615,0.198 10 false PPOS 3.729,6.49 4.042,6.688 0.313,0.198 10 false 81

A539556E01
6.042,0.719 6.5,0.917 0.458,0.198 10 false I230 6.438,0.729 6.896,0.927 0.458,0.198 10 false IGR 6.094,0.531 6.552,0.729 0.458,0.198 10 false 21 0.146,0.094 2.875,0.375 2.729,0.281 12 false w/o Smart Entry and Start System: 3.896,0.865 5.063,1.083 1.167,0.219 10 false ECU-IGR NO. 3 1.271,0.719 1.729,0.917 0.458,0.198 10 false 8B 1.271,2.135 1.729,2.333 0.458,0.198 10 false 8J 1.927,2.073 2.385,2.271 0.458,0.198 10 false IC 4.375,7.802 4.833,8 0.458,0.198 10 false ECM 6.417,5.698 6.875,5.896 0.458,0.198 10 false STA 6.083,8.146 7.156,8.563 1.073,0.417 10 false Engine Stop and Start ECU 6.01,5.677 6.469,5.875 0.458,0.198 10 false A169 3.906,3.167 5.042,3.531 1.135,0.365 10 false Power Distribution Box Assembly 3.917,1.906 5.063,2.135 1.146,0.229 10 false ECU-IGR NO. 1 1.885,0.885 2.344,1.083 0.458,0.198 10 false AM2 1.167,5.188 2.677,5.646 1.51,0.458 10 false Ignition or Starter Switch Assembly 0.604,8.417 2.458,8.698 1.854,0.281 10 false : CAN Communication Line 0.167,7.865 0.323,8.094 0.156,0.229 10 false A 0.49,7.875 0.74,8.073 0.25,0.198 10 false B 6.042,7.469 6.5,7.667 0.458,0.198 10 false I230 6.406,7.469 6.865,7.667 0.458,0.198 10 false CANL 6.094,7.292 6.552,7.49 0.458,0.198 10 false 14 4.969,7.469 5.427,7.667 0.458,0.198 10 false A182 2.927,2.313 3.625,2.531 0.698,0.219 10 false IGR NO. 1 2.385,3.135 2.698,3.333 0.313,0.198 10 false 8E 2.875,3.125 3.188,3.323 0.313,0.198 10 false 8C 3.344,3.125 3.656,3.323 0.313,0.198 10 false 8B 5.125,0.729 5.438,0.927 0.313,0.198 10 false 8B 5.125,1.74 5.438,1.938 0.313,0.198 10 false 8E 5.125,2.438 5.438,2.635 0.313,0.198 10 false 8B 5.135,2.823 5.448,3.021 0.313,0.198 10 false 8C 4.542,7.135 5.156,7.333 0.615,0.198 10 false CANH 4.552,7.479 5.167,7.677 0.615,0.198 10 false CANL 6.406,7.125 7.021,7.323 0.615,0.198 10 false CANH 4.646,6.802 5.104,7 0.458,0.198 10 false IGR 4.635,6.458 5.094,6.656 0.458,0.198 10 false STA 4.104,6.979 4.563,7.177 0.458,0.198 10 false IGP 4.354,5.073 4.813,5.271 0.458,0.198 10 false N/ST 6.052,7.125 6.521,7.333 0.469,0.208 10 false I230 6.104,6.917 6.417,7.115 0.313,0.198 10 false 13 6.094,5.479 6.406,5.677 0.313,0.198 10 false 21 2.719,3.313 3.031,3.51 0.313,0.198 10 false 17 3.198,3.313 3.51,3.51 0.313,0.198 10 false 38 2.177,3.313 2.49,3.51 0.313,0.198 10 false 14 3.781,6.781 4.063,7.042 0.281,0.26 10 false 30 5.063,6.625 5.375,6.823 0.313,0.198 10 false 33 5.063,6.271 5.375,6.469 0.313,0.198 10 false 18 5.104,6.969 5.417,7.167 0.313,0.198 10 false 4 5.104,7.302 5.417,7.5 0.313,0.198 10 false 3 1.271,0.51 1.583,0.708 0.313,0.198 10 false 24 1.292,1.938 1.448,2.135 0.156,0.198 10 false 1 0.802,7.875 0.958,8.073 0.156,0.198 10 false C 3.458,7.865 3.615,8.063 0.156,0.198 10 false E 5.188,0.531 5.5,0.729 0.313,0.198 10 false 9 5.135,1.542 5.448,1.74 0.313,0.198 10 false 22 5.135,2.24 5.448,2.438 0.313,0.198 10 false 36 5.135,2.646 5.448,2.844 0.313,0.198 10 false 41 2.01,3.969 2.469,4.167 0.458,0.198 10 false ACC 2.531,3.948 2.688,4.146 0.156,0.198 10 false 6 2.083,4.177 2.542,4.375 0.458,0.198 10 false IG1 2.531,4.177 2.688,4.375 0.156,0.198 10 false 8 2.052,4.385 2.406,4.594 0.354,0.208 10 false ST1 2.531,4.385 2.688,4.583 0.156,0.198 10 false 5 1.167,5.01 1.625,5.208 0.458,0.198 10 false I12 1.281,4.135 1.74,4.333 0.458,0.198 10 false AM1 1.063,4.146 1.219,4.344 0.156,0.198 10 false 7 3.021,7.865 3.177,8.063 0.156,0.198 10 false D 1.271,1.438 1.729,1.635 0.458,0.198 10 false 8K 1.302,1.229 1.458,1.427 0.156,0.198 10 false 1 0.292,1.625 1.458,1.844 1.167,0.219 10 false INP STD NO. 3 4.573,6.104 5.188,6.302 0.615,0.198 10 false NSR- 4.094,6.281 4.708,6.479 0.615,0.198 10 false NSR+ 5.063,5.927 5.375,6.125 0.313,0.198 10 false 33 3.781,6.083 4.094,6.281 0.313,0.198 10 false 32 4.969,7.135 5.583,7.333 0.615,0.198 10 false A182 4.979,6.792 5.594,6.99 0.615,0.198 10 false A182 4.969,6.448 5.583,6.646 0.615,0.198 10 false A182 3.698,6.958 4.313,7.156 0.615,0.198 10 false A182 4.969,6.104 5.583,6.302 0.615,0.198 10 false C137 3.698,6.281 4.313,6.479 0.615,0.198 10 false C137 4.042,4.396 4.198,4.594 0.156,0.198 10 false 5 4.854,4.396 5.01,4.594 0.156,0.198 10 false 3 4.042,4.729 4.198,4.927 0.156,0.198 10 false 2 4.854,4.729 5.01,4.927 0.156,0.198 10 false 1

A504043E03
4.479,3.958 4.813,4.177 0.333,0.219 10 false ST 1.229,3.802 2.375,4.021 1.146,0.219 10 false Starter Assembly 6.01,6.333 6.417,6.51 0.406,0.177 10 false A169 6.01,5.792 6.5,6.01 0.49,0.219 10 false A168 6.104,8.156 7.146,8.656 1.042,0.5 10 false Engine Stop and Start ECU 2.792,4.667 3.865,4.875 1.073,0.208 10 false EFI-MAIN NO. 1 4.052,5.042 5.188,5.25 1.135,0.208 10 false EFI-MAIN NO. 1 3.021,6.979 5.615,7.438 2.594,0.458 10 false Engine Hood Courtesy Switch (Hood Lock with Courtesy Light Switch Assembly) 6.417,1.583 7.052,1.885 0.635,0.302 10 false IGP 6.406,4.469 6.75,4.698 0.344,0.229 10 false +B 6.406,6.833 6.917,7.052 0.51,0.219 10 false GND1 6.417,5.354 6.875,5.594 0.458,0.24 10 false BIN1 6,4.469 6.427,4.719 0.427,0.25 10 false A169 6.021,7.292 6.51,7.5 0.49,0.208 10 false A168 6.042,1.594 6.677,1.896 0.635,0.302 10 false I230 6.01,5.323 6.479,5.552 0.469,0.229 10 false A168 0.521,6.229 1.667,6.448 1.146,0.219 10 false Auxiliary Battery 1.792,2.156 2.625,2.365 0.833,0.208 10 false IGP-MAIN 4.49,2.823 4.74,3.021 0.25,0.198 10 false ST 3.458,0.521 3.708,0.771 0.25,0.25 10 false E 3.292,6.229 3.542,6.427 0.25,0.198 10 false 1 6.406,7.792 6.948,8.01 0.542,0.219 10 false DGND 6.406,7.302 6.896,7.51 0.49,0.208 10 false GND2 6.146,5.125 6.406,5.302 0.26,0.177 10 false 3 6.135,5.594 6.417,5.885 0.281,0.292 10 false 1 6.146,7.094 6.417,7.344 0.271,0.25 10 false 2 6.135,4.271 6.354,4.479 0.219,0.208 10 false 1 6.094,1.396 6.406,1.667 0.313,0.271 10 false 18 6.146,6.135 6.365,6.365 0.219,0.229 10 false 7 4.927,3.604 5.104,3.823 0.177,0.219 10 false 1 4.115,3.604 4.365,3.833 0.25,0.229 10 false 2 4.115,4.667 4.313,4.865 0.198,0.198 10 false 2 4.906,4.667 5.156,4.927 0.25,0.26 10 false 1 6.417,6.333 6.896,6.552 0.479,0.219 10 false BNT1 6.417,5.802 6.865,6.021 0.448,0.219 10 false BIN2 6.01,7.781 6.49,8.01 0.479,0.229 10 false A169 6.01,6.813 6.5,7.083 0.49,0.271 10 false A168 6.146,7.573 6.438,7.771 0.292,0.198 10 false 6 6.146,6.604 6.406,6.833 0.26,0.229 10 false 8 4.927,3.302 5.156,3.469 0.229,0.167 10 false 5 3.021,0.521 3.219,0.74 0.198,0.219 10 false D 0.938,0.521 1.135,0.708 0.198,0.188 10 false C 0.281,0.521 0.563,0.76 0.281,0.24 10 false A 3.031,6.813 3.344,7.01 0.313,0.198 10 false A8 4.115,3.302 4.271,3.5 0.156,0.198 10 false 3 4.115,4.385 4.271,4.583 0.156,0.198 10 false 5 4.917,4.385 5.073,4.583 0.156,0.198 10 false 3 5.177,4.635 5.906,4.854 0.729,0.219 10 false EFI NO. 2 5.063,5.469 5.844,5.708 0.781,0.24 10 false BBC NO. 1 5.063,5.948 5.854,6.156 0.792,0.208 10 false BBC NO. 2 4.479,6.229 4.635,6.427 0.156,0.198 10 false 2 3.479,6.229 3.635,6.427 0.156,0.198 10 false E 4.281,6.229 4.438,6.427 0.156,0.198 10 false + 1.635,1.771 1.792,1.969 0.156,0.198 10 false 2 2.458,1.771 2.615,1.969 0.156,0.198 10 false 1 2.469,1.458 2.615,1.625 0.146,0.167 10 false 3 3.583,1.104 4.563,1.313 0.979,0.208 10 false ECU-IGP NO. 1 4.125,1.75 5.208,1.958 1.083,0.208 10 false ECU-IGP NO. 2 1.635,1.469 1.792,1.667 0.156,0.198 10 false 5 2.063,3.417 2.458,3.656 0.396,0.24 10 false C132 1.052,3.417 1.469,3.635 0.417,0.219 10 false C111 2.177,3.229 2.406,3.479 0.229,0.25 10 false 2 1.167,3.229 1.323,3.427 0.156,0.198 10 false 1 0.938,5.615 1.396,5.813 0.458,0.198 10 false ALT 1.021,4.656 2.104,4.927 1.083,0.271 10 false INP STD NO. 1 0.417,4.99 1.219,5.219 0.802,0.229 10 false BATT-MAIN 0.813,2.271 1.573,2.51 0.76,0.24 10 false IGP-MAIN 1.438,3.417 1.667,3.667 0.229,0.25 10 false B 1.823,3.417 2.052,3.667 0.229,0.25 10 false ST 0.604,0.521 0.802,0.708 0.198,0.188 10 false B 0.625,5.938 2.771,6.177 2.146,0.24 10 false Fusible Link Block Assembly 0.219,4.208 0.635,4.427 0.417,0.219 10 false A75 0.875,4.208 1.292,4.427 0.417,0.219 10 false A76 0.198,4.01 0.354,4.208 0.156,0.198 10 false 1 0.844,4.021 1,4.219 0.156,0.198 10 false 1

CAUTION / NOTICE / HINT

NOTICE:
·

When the engine stop and start ECU is replaced, read the number of starter operations before replacement and record this number to the new engine stop and start ECU after replacement.

Click hereEngine / Hybrid System>STOP AND START>STOP AND START SYSTEM>REGISTRATION

·

When the engine stop ECU has been replaced, perform external backup boost converter (Eco run vehicle converter assembly) existence learning.

Click hereEngine / Hybrid System>STOP AND START>STOP AND START SYSTEM>REGISTRATION

·

After replacing the engine stop and start ECU or air conditioner amplifier assembly, perform initialization/learning of the air conditioner information for the engine stop and start ECU.

Click hereEngine / Hybrid System>STOP AND START>STOP AND START SYSTEM>REGISTRATION

·

When the starter assembly is replaced, the number of starter operations stored in the engine stop and start ECU must be reset.

Click hereEngine / Hybrid System>STOP AND START>STOP AND START SYSTEM>REGISTRATION

·

When the starter assembly is replaced, "ST relay" must be also replaced.

·

Inspect the fuses for circuits related to this system before performing the following procedure.



HINT:

For wire harness and connector inspection procedures and precautions, refer toGeneral>INTRODUCTION>HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS>ELECTRONIC CIRCUIT INSPECTION PROCEDURE


PROCEDURE

1.CHECK CRANKING
a.

Turn the ignition switch START and check that the engine cranks.


Result:
Result Proceed to
Engine cranks A
Engine does not crank B



A

2.PERFORM ACTIVE TEST USING GTS (STARTER(HOOD CLOSE))

B

15.PERFORM ACTIVE TEST USING GTS (STARTER(HOOD CLOSE))
2.PERFORM ACTIVE TEST USING GTS (STARTER(HOOD CLOSE))
a.

Using the GTS, perform Active Test.

Powertrain > Stop and Start > Active Test
Tester Display
Starter(Hood Close)
50004 392 42017

b.

Check whether the engine cranks while the Active Test "Starter(Hood Close)" is being performed.

NOTICE:

The Active Test "Starter(Hood Close)" is stopped automatically 3 seconds after the starter assembly begins operating.


Standard:

Engine cranks



Result:
Result Proceed to
Engine cranks A
Engine does not crank B



A

3.CHECK VEHICLE CONTROL HISTORY (RoB) (ENGINE CONTROL SYSTEM)

B

14.CHECK HARNESS AND CONNECTOR (STA SIGNAL)
3.CHECK VEHICLE CONTROL HISTORY (RoB) (ENGINE CONTROL SYSTEM)
a.

Enter the following menus.

Powertrain > Engine > Utility
Tester Display
Vehicle Control History (RoB)
50005 372 55

b.

Check the vehicle control history (RoB).

Result:
Result Proceed to
Engine control system Vehicle Control History (RoB) is not output A
Engine Difficult to Start is output B
Result other than Engine Difficult to Start is output C


HINT:
·

If the value of "Cranking Time" is approximately 1.5 seconds, the stop and start control system or starter system may be malfunctioning.

·

If the value of "Cranking Time" is small (approximately 0.5 seconds or less: the minimum value varies depending on the model), the engine control system may be malfunctioning.

·

The Data List item "Cranking Time" indicates the length of time starter operation is requested by the engine stop and start ECU. If the engine speed exceeds the specified value, the engine stop and start ECU cancels its start request.





A

4.CHECK VEHICLE CONTROL HISTORY (RoB)

B

13.CHECK VEHICLE CONTROL HISTORY (RoB) (ENGINE CONTROL SYSTEM)

C

GO TO ENGINE CONTROL SYSTEM

Click hereEngine / Hybrid System>M20A-FKS, M20C-FKS, M20E-FKS (ENGINE CONTROL)>SFI SYSTEM>VEHICLE CONTROL HISTORY (RoB)


4.CHECK VEHICLE CONTROL HISTORY (RoB)
a.

Enter the following menus.

Powertrain > Stop and Start > Utility
Tester Display
Vehicle Control History (RoB)
50005 392 55

b.

Select a vehicle control history (RoB) item to display the data from the time of control.


c.

Check the output data.

Result:
Tester Display Result Proceed to
Engine Stall History during Stop&Start (Collision or Battery Voltage Low) Yes A
Engine Stall History during Engine Starting (Collision) Yes
Engine Start Fail Yes B
Vehicle control history (RoB) item is not output or No is displayed for the results of all of the freeze frame data above




A

5.CHECK VEHICLE CONDITION (COLLISION HISTORY)

B

6.CHECK HARNESS AND CONNECTOR (ENGINE STOP AND START ECU - ST RELAY)
5.CHECK VEHICLE CONDITION (COLLISION HISTORY)
a.

Check if the vehicle was in a collision when the engine stalled.

Result:
Result Proceed to
Vehicle was in collision when engine stalled A
Vehicle was not in collision when engine stalled B


HINT:

When "Engine Stall History during Stop&Start (Collision or Battery Voltage Low)" or "Engine Stall History during Engine Starting (Collision)" is stored:

This may have been stored because the vehicle was in a collision or a collision detection signal was input while stop and start control was operating.




A

END (ENGINE STALLED BECAUSE COLLISION DETECTION SIGNAL WAS RECEIVED)

B

GO TO AIRBAG SYSTEM

Click hereVehicle Interior>SUPPLEMENTAL RESTRAINT SYSTEMS>AIRBAG SYSTEM>HOW TO PROCEED WITH TROUBLESHOOTING


6.CHECK HARNESS AND CONNECTOR (ENGINE STOP AND START ECU - ST RELAY)
a.

Disconnect the I223 certification ECU (smart key ECU assembly) connector.*1

*1: w/ Smart Entry and Start System



b.

Disconnect the A182 ECM connector.


c.

Disconnect the A169 engine stop and start ECU connector.


d.

Remove the ST relay from the NO. 1 engine room relay block.


e.

Measure the resistance according to the value(s) in the table below.

Standard Resistance:
Tester Connection Condition Specified Condition
A169-21 (STA) - ST relay terminal 2 Always Below 1 Ω
A169-21 (STA) - Body ground Always 10 kΩ or higher
ST relay terminal 2 - Body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

7.CHECK HARNESS AND CONNECTOR (ST RELAY - BODY GROUND)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

7.CHECK HARNESS AND CONNECTOR (ST RELAY - BODY GROUND)
a.

Remove the ST relay from the NO. 1 engine room relay block.


b.

Measure the resistance according to the value(s) in the table below.

Standard Resistance:
Tester Connection Condition Specified Condition
ST relay terminal 1 - Body ground Always Below 1 Ω



Result:
Proceed to
OK
NG



OK

8.CHECK HARNESS AND CONNECTOR (ST RELAY - AUXILIARY BATTERY)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

8.CHECK HARNESS AND CONNECTOR (ST RELAY - AUXILIARY BATTERY)
a.

Remove the ST relay from the NO. 1 engine room relay block.


b.

Measure the voltage according to the value(s) in the table below.

Standard Voltage:
Tester Connection Condition Specified Condition
ST relay terminal 5 - Body ground Always 9.5 to 14 V



Result:
Proceed to
OK
NG



OK

9.CHECK HARNESS AND CONNECTOR (STARTER ASSEMBLY - AUXILIARY BATTERY)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

9.CHECK HARNESS AND CONNECTOR (STARTER ASSEMBLY - AUXILIARY BATTERY)
a.
A536376C01
2.385,1.26 2.625,0.438 2.625,0.438 2.76,0.438 true 0.208,0.208 0.448,0.49 0.24,0.281 10 false *1 2.833,0.344 3.073,0.625 0.24,0.281 10 false *a
*1 Starter Assembly
*a C111-1 (B)


Measure the voltage according to the value(s) in the table below.

Standard Voltage:
Tester Connection Condition Specified Condition
C111-1 (B) - Body ground Always 9.5 to 14 V


NOTICE:

Before performing this step, check that the starter assembly connector C111 is not disconnected or loose.



Result:
Proceed to
OK
NG



OK

10.CHECK HARNESS AND CONNECTOR (ST RELAY - STARTER ASSEMBLY)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

10.CHECK HARNESS AND CONNECTOR (ST RELAY - STARTER ASSEMBLY)
a.

Remove the ST relay from the NO. 1 engine room relay block.


b.

Disconnect the C132 starter assembly connector.


c.

Measure the resistance according to the value(s) in the table below.

Standard Resistance:
Tester Connection Condition Specified Condition
ST relay terminal 3 - C132-2 (ST) Always Below 1 Ω



Result:
Proceed to
OK
NG



OK

11.INSPECT RELAY (ST RELAY)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

11.INSPECT RELAY (ST RELAY)

Click hereEngine / Hybrid System>M20A-FKS, M20C-FKS, M20E-FKS (STARTING)>RELAY>INSPECTION

Result:
Proceed to
OK
NG



OK

12.INSPECT STARTER ASSEMBLY

NG

REPLACE RELAY (ST RELAY)

12.INSPECT STARTER ASSEMBLY

Click hereEngine / Hybrid System>M20A-FKS, M20C-FKS, M20E-FKS (STARTING)>STARTER>INSPECTION

Result:
Proceed to
OK
NG



OK

REPLACE ENGINE STOP AND START ECU

Click hereEngine / Hybrid System>STOP AND START>ENGINE STOP AND START ECU>REMOVAL

HINT:

If arriving at this item from the item "Drive command is being sent from the engine stop and start ECU but the starter itself is not moving" of "After Engine Stops due to Stop and Start System, Engine does not Restart" in Stop and Start / Stop and Start System / Problem Symptoms Table, go to SIMULATION METHOD.



NG

REPLACE STARTER ASSEMBLY

Click hereEngine / Hybrid System>M20A-FKS, M20C-FKS, M20E-FKS (STARTING)>STARTER>REMOVAL


13.CHECK VEHICLE CONTROL HISTORY (RoB) (ENGINE CONTROL SYSTEM)
a.

Enter the following menus.

Powertrain > Engine > Utility
Tester Display
Vehicle Control History (RoB)
50005 372 55

b.

Select Engine Difficult to Start from the Vehicle Control History (RoB) to display the data from the time of control.


c.

Check the output data.

HINT:
·

Checking the freeze frame data allows the vehicle conditions at the time of detection to be confirmed.

·

As Vehicle Control History (RoB) may be overwritten whenever the trigger conditions are met, make sure to save the Vehicle Control History (RoB) data before performing any inspections.




Result:
Result Proceed to
Engine speed does not rise to approximately 300 rpm (Starter does not rotate) A
Engine speed rises to approximately 300 rpm (Starter rotates) B



A

4.CHECK VEHICLE CONTROL HISTORY (RoB)

B

GO TO ENGINE CONTROL SYSTEM

Click hereEngine / Hybrid System>M20A-FKS, M20C-FKS, M20E-FKS (ENGINE CONTROL)>SFI SYSTEM>VEHICLE CONTROL HISTORY (RoB)


14.CHECK HARNESS AND CONNECTOR (STA SIGNAL)
a.

Disconnect the engine stop and start ECU connectors.

A348463C42
0.917,0.667 1.333,0.917 0.417,0.25 3.25,0.5 3.667,0.75 0.417,0.25 5.75,0.531 6.167,0.781 0.417,0.25 3.833,2.219 3.667,1.917 true 2.979,2.208 3.177,1.75 true 0.323,0.115 0.635,0.313 0.313,0.198 10 false *a 0.979,0.719 1.448,0.906 0.469,0.188 10 false A168 3.292,0.552 3.74,0.75 0.448,0.198 10 false A169 5.833,0.573 6.333,0.833 0.5,0.26 10 false I230 3.896,2.229 4.208,2.427 0.313,0.198 10 false STA 2.74,2.229 3.208,2.438 0.469,0.208 10 false DGND
*a Front view of wire harness connector
(to Engine Stop and Start ECU) 		- -



b.

Measure the voltage according to the value(s) in the table below.

Click hereEngine / Hybrid System>STOP AND START>STOP AND START SYSTEM>TERMINALS OF ECU

Standard Voltage:
Tester Connection Condition Specified Condition
A169-21 (STA) - A169-6 (DGND) Cranking commanded via Active Test item Starter(Hood Close) 6 to 14 V


HINT:

The Active Test "Starter" is stopped automatically 3 seconds after the starter assembly begins operating.



Result:
Proceed to
OK
NG



OK

REPAIR OR REPLACE HARNESS OR CONNECTOR (ENGINE STOP AND START ECU - ST RELAY)

NG

REPLACE ENGINE STOP AND START ECU

Click hereEngine / Hybrid System>STOP AND START>ENGINE STOP AND START ECU>REMOVAL

HINT:

If arriving at this item from the item "Drive command is being sent from the engine stop and start ECU but the starter itself is not moving" of "After Engine Stops due to Stop and Start System, Engine does not Restart" in Stop and Start / Stop and Start System / Problem Symptoms Table, go to SIMULATION METHOD.



15.PERFORM ACTIVE TEST USING GTS (STARTER(HOOD CLOSE))
a.

Using the GTS, perform Active Test.

Powertrain > Stop and Start > Active Test
Tester Display
Starter(Hood Close)
50004 392 42017

b.

Check whether the engine cranks while the Active Test "Starter(Hood Close)" is being performed.

NOTICE:

The Active Test "Starter(Hood Close)" is stopped automatically 3 seconds after the starter assembly begins operating.


Standard:

Engine cranks



Result:
Result Proceed to
Engine cranks A
Engine does not crank B



A

16.READ VALUE USING GTS (NEUTRAL SWITCH)

B

22.CHECK HARNESS AND CONNECTOR (STA SIGNAL)
16.READ VALUE USING GTS (NEUTRAL SWITCH)
a.

In accordance with the display on the GTS, read the Data List.

Powertrain > Stop and Start > Data List
Tester Display
Neutral Switch
50003 392 202
OK:
Tester Display Condition Normal Condition
Neutral Switch Shift lever in P or N ON
Shift lever not in P or N OFF



Result:
Result Proceed to
OK (w/ Smart Entry and Start System) A
OK (w/o Smart Entry and Start System) B
NG C



A

17.CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - ENGINE STOP AND START ECU)

B

18.INSPECT RELAY (N/ST)

C

REPLACE ENGINE STOP AND START ECU

Click hereEngine / Hybrid System>STOP AND START>ENGINE STOP AND START ECU>REMOVAL

HINT:

If arriving at this item from the item "Drive command is being sent from the engine stop and start ECU but the starter itself is not moving" of "After Engine Stops due to Stop and Start System, Engine does not Restart" in Stop and Start / Stop and Start System / Problem Symptoms Table, go to SIMULATION METHOD.



17.CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - ENGINE STOP AND START ECU)
a.

Disconnect the I223 certification ECU (smart key ECU assembly) connector.


b.

Disconnect the A169 engine stop and start ECU connector.


c.

Disconnect the A182 ECM connector.


d.

Remove the ST relay from the NO. 1 engine room relay block.


e.

Measure the resistance according to the value(s) in the table below.

Standard Resistance:
Tester Connection Condition Specified Condition
I223-10 (STAR) - A169-21 (STA) Always Below 1 Ω
I223-10 (STAR) - Body ground Always 10 kΩ or higher
A169-21 (STA) - Body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

GO TO SMART ENTRY AND START SYSTEM (START FUNCTION)

Click hereVehicle Interior>THEFT DETERRENT / KEYLESS ENTRY>SMART ENTRY AND START SYSTEM (for Start Function, Gasoline Model)>HOW TO PROCEED WITH TROUBLESHOOTING


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

18.INSPECT RELAY (N/ST)
a.

Remove the N/ST relay from the NO. 1 engine room relay block.


b.
A273391N01
2.667,0.74 2.927,0.74 true 2.531,1.125 2.948,1.125 true 2.531,1.625 2.948,1.625 true 1.708,0.74 1.969,0.74 true 0.229,1.313 0.385,1.51 0.156,0.198 10 1 1.188,1.313 1.344,1.51 0.156,0.198 10 2 0.219,0.781 0.375,0.979 0.156,0.198 10 3 1.188,0.771 1.344,0.969 0.156,0.198 10 5 3,1.052 3.156,1.25 0.156,0.198 10 5 1.604,0.667 1.76,0.865 0.156,0.198 10 1 2.99,0.667 3.146,0.865 0.156,0.198 10 2 3,1.552 3.156,1.75 0.156,0.198 10 3

Measure the resistance according to the value(s) in the table below.

Standard Resistance:
Tester Connection Condition Specified Condition
3 - 5 Auxiliary battery voltage not applied between terminals 1 and 2 10 kΩ or higher
Auxiliary battery voltage applied between terminals 1 and 2 Below 1 Ω



Result:
Proceed to
OK
NG



OK

19.CHECK HARNESS AND CONNECTOR (IGNITION OR STARTER SWITCH ASSEMBLY - N/ST RELAY)

NG

REPLACE RELAY (N/ST)

19.CHECK HARNESS AND CONNECTOR (IGNITION OR STARTER SWITCH ASSEMBLY - N/ST RELAY)
a.

Disconnect the I12 ignition or starter switch assembly connector.


b.

Remove the N/ST relay from the NO. 1 engine room relay block.


c.

Measure the resistance according to the value(s) in the table below.

Standard Resistance:
Tester Connection Condition Specified Condition
I12-5 (ST1) - N/ST relay terminal 5 Always Below 1 Ω
I12-5 (ST1) - Body ground Always 10 kΩ or higher
N/ST relay terminal 5 - Body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

20.CHECK HARNESS AND CONNECTOR (N/ST RELAY - ENGINE STOP AND START ECU)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

20.CHECK HARNESS AND CONNECTOR (N/ST RELAY - ENGINE STOP AND START ECU)
a.

Disconnect the A169 engine stop and start ECU connector.


b.

Disconnect the A182 ECM connector.


c.

Remove the ST relay and N/ST relay from the NO. 1 engine room relay block.


d.

Measure the resistance according to the value(s) in the table below.

Standard Resistance:
Tester Connection Condition Specified Condition
A169-21 (STA) - N/ST relay terminal 3 Always Below 1 Ω
A169-21 (STA) - Body ground Always 10 kΩ or higher
N/ST relay terminal 3 - Body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

21.CHECK IGNITION OR STARTER SWITCH ASSEMBLY (ST1 SIGNAL)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

21.CHECK IGNITION OR STARTER SWITCH ASSEMBLY (ST1 SIGNAL)
a.

Disconnect A169 the engine stop and start ECU connector.


b.

Measure the voltage according to the value(s) in the table below.

Standard Voltage:
Tester Connection Condition Specified Condition
A169-21 (STA) - Body ground Engine started using ignition switch (ignition switch turned to START) 9.5 to 14 V



Result:
Proceed to
OK
NG



OK

SIMULATION METHOD TO CHECK

Click hereGeneral>INTRODUCTION>HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS>HOW TO PROCEED WITH TROUBLESHOOTING


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

22.CHECK HARNESS AND CONNECTOR (STA SIGNAL)
a.

Disconnect the engine stop and start ECU connector.

A504059C01
3.302,0.281 3.719,0.531 0.417,0.25 3.865,2.344 3.698,2.042 true 2.948,2.323 3.146,1.865 true 0.323,0.115 0.635,0.313 0.313,0.198 10 false *a 3.354,0.313 3.802,0.51 0.448,0.198 10 false A169 3.75,2.375 4.063,2.573 0.313,0.198 10 false STA 2.729,2.375 3.198,2.583 0.469,0.208 10 false DGND
*a Front view of wire harness connector
(to Engine Stop and Start ECU) 		- -



b.

Measure the voltage according to the value(s) in the table below.

Click hereEngine / Hybrid System>STOP AND START>STOP AND START SYSTEM>TERMINALS OF ECU

Standard Voltage:
Tester Connection Condition Specified Condition
A169-21 (STA) - A169-6 (DGND) Engine start 6 to 14 V



Result:
Result Proceed to
OK A
NG B



A

23.INSPECT RELAY (ST RELAY)

B

28.CHECK HARNESS AND CONNECTOR (POWER SUPPLY CIRCUIT)
23.INSPECT RELAY (ST RELAY)

Click hereEngine / Hybrid System>M20A-FKS, M20C-FKS, M20E-FKS (ENGINE CONTROL)>RELAY>ON-VEHICLE INSPECTION

Result:
Proceed to
OK
NG



OK

24.CHECK HARNESS AND CONNECTOR (ST RELAY - AUXILIARY BATTERY)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

24.CHECK HARNESS AND CONNECTOR (ST RELAY - AUXILIARY BATTERY)
a.

Remove the ST relay from the NO. 1 engine room relay block.


b.

Measure the voltage according to the value(s) in the table below.

Standard Voltage:
Tester Connection Condition Specified Condition
ST relay terminal 5 - Body ground Always 9.5 to 14 V



Result:
Proceed to
OK
NG



OK

25.CHECK HARNESS AND CONNECTOR (ST RELAY - STARTER ASSEMBLY)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

25.CHECK HARNESS AND CONNECTOR (ST RELAY - STARTER ASSEMBLY)
a.

Remove the ST relay from the NO. 1 engine room relay block.


b.

Disconnect the C132 starter assembly connector.


c.

Measure the resistance according to the value(s) in the table below.

Standard Resistance:
Tester Connection Condition Specified Condition
ST relay terminal 3 - C132-2 (ST) Always Below 1 Ω



Result:
Proceed to
OK
NG



OK

26.CHECK HARNESS AND CONNECTOR (ST RELAY - BODY GROUND)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

26.CHECK HARNESS AND CONNECTOR (ST RELAY - BODY GROUND)
a.

Remove the ST relay from the NO. 1 engine room relay block.


b.

Measure the resistance according to the value(s) in the table below.

Standard Resistance:
Tester Connection Condition Specified Condition
ST relay terminal 1 - Body ground Always Below 1 Ω



Result:
Proceed to
OK
NG



OK

27.CHECK HARNESS AND CONNECTOR (ENGINE STOP AND START ECU - ST RELAY)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

27.CHECK HARNESS AND CONNECTOR (ENGINE STOP AND START ECU - ST RELAY)
a.

Disconnect the I223 certification ECU (smart key ECU assembly) connector.*1

*1: w/ Smart Entry and Start System



b.

Disconnect the A182 ECM connector.


c.

Disconnect the A169 engine stop and start ECU connector.


d.

Remove the ST relay and N/ST relay*2 from the NO. 1 engine room relay block.

*2: w/o Smart Entry and Start System



e.

Measure the resistance according to the value(s) in the table below.

Standard Resistance:
Tester Connection Condition Specified Condition
A169-21 (STA) - ST relay terminal 2 Always Below 1 Ω
A169-21 (STA) - Body ground Always 10 kΩ or higher
ST relay terminal 2 - Body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

REPLACE STARTER ASSEMBLY

Click hereEngine / Hybrid System>M20A-FKS, M20C-FKS, M20E-FKS (STARTING)>STARTER>REMOVAL


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

28.CHECK HARNESS AND CONNECTOR (POWER SUPPLY CIRCUIT)
a.

Disconnect the engine stop and start ECU connectors.

A348463C41
0.917,0.667 1.333,0.917 0.417,0.25 3.25,0.5 3.667,0.75 0.417,0.25 5.75,0.531 6.167,0.781 0.417,0.25 0.365,2.073 0.719,1.563 true 0.906,2.052 0.74,1.75 true 2.438,2.094 2.604,1.708 true 5.542,2.063 5.771,1.771 true 6.354,2.052 6.198,1.771 true 0.323,0.115 0.635,0.313 0.313,0.198 10 false *a 0.979,0.719 1.448,0.906 0.469,0.188 10 false A168 3.292,0.552 3.74,0.75 0.448,0.198 10 false A169 5.833,0.573 6.333,0.833 0.5,0.26 10 false I230 0.844,2.104 1.156,2.302 0.313,0.198 10 false BIN1 0.229,2.104 0.542,2.302 0.313,0.198 10 false BIN2 2.323,2.115 2.635,2.313 0.313,0.198 10 false +B 6.292,2.083 6.604,2.281 0.313,0.198 10 false IGR 5.427,2.094 5.74,2.292 0.313,0.198 10 false IGP
*a Front view of wire harness connector
(to Engine Stop and Start ECU) 		- -



b.

Measure the voltage according to the value(s) in the table below.

Click hereEngine / Hybrid System>STOP AND START>STOP AND START SYSTEM>TERMINALS OF ECU

Standard Voltage:
Tester Connection Condition Specified Condition
A168-3 (BIN1) - Body ground Always 9.5 to 14 V
A168-1 (BIN2) - Body ground Always 9.5 to 14 V



c.

Turn the ignition switch to ON.


d.

Measure the voltage according to the value(s) in the table below.

Click hereEngine / Hybrid System>STOP AND START>STOP AND START SYSTEM>TERMINALS OF ECU

Standard Voltage:
Tester Connection Condition Specified Condition
A169-1 (+B) - Body ground Ignition switch ON 9.5 to 14 V
I230-18 (IGP) - Body ground Ignition switch ON 9.5 to 14 V
I230-21 (IGR) - Body ground Ignition switch ON 9.5 to 14 V



Result:
Proceed to
OK
NG



OK

29.CHECK HARNESS AND CONNECTOR (ENGINE STOP AND START ECU - BODY GROUND)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

29.CHECK HARNESS AND CONNECTOR (ENGINE STOP AND START ECU - BODY GROUND)
a.

Disconnect the A168 and A169 engine stop and start ECU connectors.


b.

Measure the resistance according to the value(s) in the table below.

Click hereEngine / Hybrid System>STOP AND START>STOP AND START SYSTEM>TERMINALS OF ECU

Standard Resistance:
Tester Connection Condition Specified Condition
A168-2 (GND2) - Body ground Always Below 1 Ω
A168-8 (GND1) - Body ground Always Below 1 Ω
A169-6 (DGND) - Body ground Always Below 1 Ω



Result:
Proceed to
OK
NG



OK

30.CHECK HARNESS AND CONNECTOR (ENGINE STOP AND START ECU - ST RELAY)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

30.CHECK HARNESS AND CONNECTOR (ENGINE STOP AND START ECU - ST RELAY)
a.

Disconnect the I223 certification ECU (smart key ECU assembly) connector.*1

*1: w/ Smart Entry and Start System



b.

Disconnect the A182 ECM connector.


c.

Disconnect the A169 engine stop and start ECU connector.


d.

Remove the ST relay and N/ST relay*2 from the NO. 1 engine room relay block.

*2: w/o Smart Entry and Start System



e.

Measure the resistance according to the value(s) in the table below.

Standard Resistance:
Tester Connection Condition Specified Condition
A169-21 (STA) - ST relay terminal 2 Always Below 1 Ω
A169-21 (STA) - Body ground Always 10 kΩ or higher
ST relay terminal 2 - Body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

REPLACE ENGINE STOP AND START ECU

Click hereEngine / Hybrid System>STOP AND START>ENGINE STOP AND START ECU>REMOVAL

HINT:

If arriving at this item from the item "Drive command is being sent from the engine stop and start ECU but the starter itself is not moving" of "After Engine Stops due to Stop and Start System, Engine does not Restart" in Stop and Start / Stop and Start System / Problem Symptoms Table, go to SIMULATION METHOD.



NG

REPAIR OR REPLACE HARNESS OR CONNECTOR