RM3660EC _51 Engine / Hybrid System _080774 STOP AND START _0393362 STOP AND START SYSTEM J

STOP AND START  STOP AND START SYSTEM  STA Signal Circuit  


DESCRIPTION

While the engine is being cranked, a starter operation request signal is sent to terminal STA of the ECM.

HINT:

If there is an open in the STA circuit of the ECM, stop and start control will be prohibited after the third time the engine is started by stop and start control.

·

Stop and start control will be prohibited until the ignition switch is turned off.

·

The MIL will not illuminate.

·

If there is an open in the STA circuit of the ECM, the engine can still be started using the ignition switch, as the ECM also receives the starter operation request signal from the engine stop and start ECU via CAN communication. (Stop and start control is prohibited as the reliability of the signal sent via CAN communication cannot be assured while the voltage drops during operation of the starter assembly.)



A347476E24
2.667,0.51 4.604,0.75 1.938,0.24 10 false Starter operation request signal 4.26,1.615 5.823,1.833 1.563,0.219 10 false Starter operation request 4.26,2.094 5.823,2.313 1.563,0.219 10 false Starter operation request 5.958,2.51 7.01,2.865 1.052,0.354 10 false Engine Stop and Start ECU 2.385,2.115 3,2.313 0.615,0.198 10 false Open 0.583,2.51 1.042,2.708 0.458,0.198 10 false ECM 0.781,1.875 1.24,2.073 0.458,0.198 10 false STA 6.146,1.885 6.604,2.083 0.458,0.198 10 false STA 6.156,0.833 6.615,1.031 0.458,0.198 10 false CAN 0.75,0.823 1.208,1.021 0.458,0.198 10 false CAN 1.229,3.25 3.979,3.448 2.75,0.198 10 false from ST Fuse 0.833,4.74 3.896,4.938 3.063,0.198 10 false for Starter Assembly 3.885,4 5.115,4.198 1.229,0.198 10 false ST 0.396,5.333 2.156,5.552 1.76,0.219 10 false : CAN Communication Line

WIRING DIAGRAM

A399675E30
0.969,0.698 1.583,0.896 0.615,0.198 10 false CANH 0.979,1.104 1.594,1.302 0.615,0.198 10 false CANL 1.063,1.573 1.677,1.771 0.615,0.198 10 false STA 1.438,0.542 1.99,0.719 0.552,0.177 10 false 13 1.438,0.927 1.99,1.104 0.552,0.177 10 false 26 1.448,1.469 2,1.646 0.552,0.177 10 false 29 0.667,2.385 1.281,2.583 0.615,0.198 10 false A46 1.021,2.385 1.635,2.583 0.615,0.198 10 false ECM 5.896,0.698 6.51,0.896 0.615,0.198 10 false CANH 5.896,1.104 6.51,1.302 0.615,0.198 10 false CANL 5.896,1.583 6.51,1.781 0.615,0.198 10 false STA 5.531,0.698 5.958,0.865 0.427,0.167 10 false I58 5.531,1.094 5.958,1.26 0.427,0.167 10 false I58 5.458,1.573 5.885,1.74 0.427,0.167 10 false A124 5.573,0.49 6,0.656 0.427,0.167 10 false 13 5.563,0.917 5.99,1.083 0.427,0.167 10 false 14 5.563,1.385 5.99,1.552 0.427,0.167 10 false 21 3.406,4.281 4.021,4.479 0.615,0.198 10 false ST 3.833,3.448 4.365,3.635 0.531,0.188 10 false 3 3.833,3.854 4.365,4.042 0.531,0.188 10 false 1 3.052,3.448 3.583,3.635 0.531,0.188 10 false 5 3.042,3.865 3.573,4.052 0.531,0.188 10 false 2 1.854,3.708 2.469,3.906 0.615,0.198 10 false ST 0.76,4.083 1.75,4.406 0.99,0.323 10 false BATT-MAIN 0.875,4.698 1.49,4.896 0.615,0.198 10 false Battery 1.573,5.323 3.302,5.625 1.729,0.302 10 false : CAN Communication Line 5.677,4.26 6.802,4.563 1.125,0.302 10 false Starter Assembly 5.688,4.104 6.813,4.406 1.125,0.302 10 false C87 5.875,3.563 6.802,3.844 0.927,0.281 10 false SL1 5.708,3.448 5.99,3.635 0.281,0.188 10 false 2 5.427,2.385 7.125,2.688 1.698,0.302 10 false Engine Stop and Start ECU

PROCEDURE

1.READ VALUE USING GTS (STARTER SW)
a.

Connect the GTS to the DLC3.


b.

Turn the ignition switch to ON.


c.

Turn the GTS on.


d.

Enter the following menus: Powertrain / Engine / Data List / Starter SW.

Powertrain > Engine > Data List
Tester Display
Starter SW
50003 372 11

e.

Read the values displayed on the GTS when the ignition switch is ON and START.

OK:
GTS Display Condition Normal Condition
Starter SW Ignition switch ON OFF
Ignition switch START ON



Result:
Proceed to
OK
NG



OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

Click hereEngine / Hybrid System>STOP AND START>STOP AND START SYSTEM>PROBLEM SYMPTOMS TABLE


NG

2.CHECK HARNESS AND CONNECTOR (ECM - ST RELAY)
2.CHECK HARNESS AND CONNECTOR (ECM - ST RELAY)
a.

Disconnect the ECM connector.


b.

Remove the ST relay from the No. 1 engine room relay block and No. 1 junction block assembly.


c.

Disconnect the engine stop and start ECU connector.


d.

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

Standard Resistance:
Tester Connection Condition Specified Condition
A46-29 (STA) - 1 (ST relay) Always Below 1 Ω



Result:
Proceed to
OK
NG



OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

Click hereEngine / Hybrid System>STOP AND START>STOP AND START SYSTEM>PROBLEM SYMPTOMS TABLE


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR