RM35X0E _51 Engine / Hybrid System _078825 STOP AND START _0382334 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 or starter switch assembly, 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.)

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 6.125,1.885 6.583,2.083 0.458,0.198 10 false STA2 6.135,0.833 6.594,1.031 0.458,0.198 10 false CAN 0.75,0.823 1.208,1.021 0.458,0.198 10 false CAN 0.875,3.25 3.625,3.448 2.75,0.198 10 false from ST NO.1 Fuse 0.833,4.74 3.896,4.938 3.063,0.198 10 false for Starter Assembly 3.885,4 5.24,4.24 1.354,0.24 10 false STARTER NO.2 0.396,5.333 2.156,5.552 1.76,0.219 10 false : CAN Communication Line

WIRING DIAGRAM

0.938,0.521 1.552,0.719 0.615,0.198 10 false CANH 0.969,0.938 1.583,1.135 0.615,0.198 10 false CANL 1.063,1.385 1.677,1.583 0.615,0.198 10 false STA 1.448,0.698 2,0.875 0.552,0.177 10 false 17 1.448,1.104 2,1.281 0.552,0.177 10 false 28 1.458,1.5 2.01,1.677 0.552,0.177 10 false 22 0.833,2.208 1.448,2.406 0.615,0.198 10 false N2 0.833,2.396 1.448,2.594 0.615,0.198 10 false ECM 5.896,0.542 6.51,0.74 0.615,0.198 10 false CANH 5.896,0.917 6.51,1.115 0.615,0.198 10 false CANL 5.896,1.385 6.51,1.583 0.615,0.198 10 false STA2 5.521,0.521 5.948,0.688 0.427,0.167 10 false N33 5.521,0.917 5.948,1.083 0.427,0.167 10 false N33 5.51,1.385 5.938,1.552 0.427,0.167 10 false N32 5.552,0.302 5.979,0.469 0.427,0.167 10 false 13 5.552,0.729 5.979,0.896 0.427,0.167 10 false 14 5.563,1.188 5.99,1.354 0.427,0.167 10 false 23 3.031,4.146 4.208,4.375 1.177,0.229 10 false STARTER NO.2 3.865,3.5 4.396,3.688 0.531,0.188 10 false 3 3.865,3.917 4.396,4.104 0.531,0.188 10 false 2 3.031,3.5 3.563,3.688 0.531,0.188 10 false 5 3.021,3.917 3.552,4.104 0.531,0.188 10 false 1 1.823,3.563 2.438,3.76 0.615,0.198 10 false ST NO.1 0.646,3.917 2.427,4.333 1.781,0.417 10 false Fusible Link Block Assembly (Main Battery) 0.771,4.698 2.073,4.979 1.302,0.281 10 false Battery 1.573,5.323 3.302,5.625 1.729,0.302 10 false : CAN Communication Line 5.698,4.135 6.823,4.438 1.125,0.302 10 false Starter Assembly 5.698,3.938 6.823,4.24 1.125,0.302 10 false E44 5.875,3.375 6.802,3.656 0.927,0.281 10 false SL2 5.698,3.51 5.979,3.698 0.281,0.188 10 false 2 5.385,2.208 7.083,2.51 1.698,0.302 10 false Engine Stop and Start ECU

PROCEDURE

1.READ VALUE USING GTS (STARTER SW)

Connect the GTS to the DLC3.

Turn the ignition switch to ON.

Turn the GTS on.

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

Powertrain > Engine > Data List

Tester Display
Starter SW

50003 372 11

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
Starter SW	Ignition switch START	ON

Result:

Proceed to
OK
NG

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

Click hereEngine / Hybrid System>STOP AND START>STOP AND START SYSTEM>PROBLEM SYMPTOMS TABLE201902,999999,_51,_078825,_0382334,RM100000001GBQ7,

2.CHECK HARNESS AND CONNECTOR (ECM - STARTER NO.2 RELAY)

Disconnect the ECM connector.

Remove the STARTER NO.2 relay from the No. 1 engine room relay block and No. 1 junction block assembly.

Disconnect the engine stop and start ECU connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
N2-22 (STA) - 2 (STARTER NO.2 relay)	Always	Below 1 Ω

Result:

Proceed to
OK
NG

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

Click hereEngine / Hybrid System>STOP AND START>STOP AND START SYSTEM>PROBLEM SYMPTOMS TABLE201902,999999,_51,_078825,_0382334,RM100000001GBQ7,

REPAIR OR REPLACE HARNESS OR CONNECTOR