RM38N0EC _51 Engine / Hybrid System _111803 STOP AND START _0509671 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.)

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 6.156,0.833 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 0.833,4.74 3.896,4.938 3.063,0.198 10 false for Starter Assembly 0.396,5.333 2.156,5.552 1.76,0.219 10 false : CAN Communication Line 6.146,1.885 6.74,2.104 0.594,0.219 10 false STA 3.875,3.99 5.104,4.188 1.229,0.198 10 false ST NO. 1 0.698,3.26 3.448,3.458 2.75,0.198 10 false from ST NO. 1 Fuse

WIRING DIAGRAM

5.885,0.698 6.5,0.896 0.615,0.198 10 false CANH 0.917,0.698 1.531,0.896 0.615,0.198 10 false CANH 5.896,1.094 6.51,1.292 0.615,0.198 10 false CANL 0.938,1.094 1.552,1.292 0.615,0.198 10 false CANL 5.896,1.563 6.354,1.76 0.458,0.198 10 false STA 1,1.573 1.458,1.771 0.458,0.198 10 false STA 5.479,0.708 5.938,0.906 0.458,0.198 10 false A104 5.479,1.115 5.938,1.313 0.458,0.198 10 false A104 5.479,1.573 5.938,1.771 0.458,0.198 10 false A106 5.542,0.479 5.854,0.677 0.313,0.198 10 false 13 5.542,0.896 5.854,1.094 0.313,0.198 10 false 14 5.552,1.354 5.865,1.552 0.313,0.198 10 false 21 1.458,0.542 1.771,0.74 0.313,0.198 10 false 4 1.458,0.938 1.771,1.135 0.313,0.198 10 false 5 1.427,1.458 1.74,1.656 0.313,0.198 10 false 18 0.75,2.375 1.208,2.573 0.458,0.198 10 false A109 0.854,2.552 1.719,2.75 0.865,0.198 10 false ECM 5.344,2.385 7.135,2.74 1.792,0.354 10 false Engine Stop and Start ECU 0.875,4.677 2.26,4.99 1.385,0.313 10 false Battery 0.802,4.031 2.24,4.281 1.438,0.25 10 false FL MAIN 1.667,3.698 2.896,3.896 1.229,0.198 10 false ST NO. 1 1.594,5.323 4.208,5.573 2.615,0.25 10 false : CAN Communication Line 3.188,4.302 4.417,4.5 1.229,0.198 10 false ST NO. 1 3.052,3.438 3.208,3.635 0.156,0.198 10 false 5 3.823,3.427 3.979,3.625 0.156,0.198 10 false 3 3.042,3.844 3.198,4.042 0.156,0.198 10 false 1 3.823,3.844 3.979,4.042 0.156,0.198 10 false 2 5.479,3.542 5.833,3.74 0.354,0.198 10 false C123 5.583,3.333 5.74,3.531 0.156,0.198 10 false 1 5.896,3.521 6.406,3.75 0.51,0.229 10 false ST*1 5.688,4.833 7.073,5.042 1.385,0.208 10 false Starter Assembly 5.479,3.969 6.094,4.167 0.615,0.198 10 false C121 5.479,4.354 6.094,4.552 0.615,0.198 10 false C122 5.896,3.969 6.354,4.198 0.458,0.229 10 false ST*2 5.906,4.365 6.427,4.563 0.521,0.198 10 false ZYV 5.146,3.458 5.458,3.656 0.313,0.198 10 false *1 5.156,3.865 5.469,4.063 0.313,0.198 10 false *2 3.958,5.531 6.563,5.729 2.604,0.198 10 false *2: for GTMC made 3.958,5.323 6.563,5.521 2.604,0.198 10 false *1: for SFTM made 5.583,3.792 5.74,3.99 0.156,0.198 10 false 1 5.573,4.177 5.729,4.375 0.156,0.198 10 false 1

PROCEDURE

1.READ VALUE USING GTS (STARTER SW)

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

Powertrain > Engine > Data List

Tester Display
Starter SW

50003 372 11

OK:

GTS Display	Switch 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 TABLE202111,999999,_51,_111803,_0509671,RM100000002064N,

2.CHECK HARNESS AND CONNECTOR (ECM - ST NO. 1 RELAY)

Disconnect the engine stop and start ECU connector.

Disconnect the ECM connector.

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

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
Click Location & Routing(A109)Location & Routingewd_type=routing;type=c;code=A109 Click Connector(A109)Engine Compartment>Engine Room Main Wire / Transmission Wire>ECMewd_type=component;type=c;code=A109;pinno=18
A109-18 (STA) - ST NO. 1 relay terminal 2	Always	Below 1 Ω

Tester Connection

Condition

Specified Condition

Click Location & Routing(A109)Location & Routingewd_type=routing;type=c;code=A109

Click Connector(A109)Engine Compartment>Engine Room Main Wire / Transmission Wire>ECMewd_type=component;type=c;code=A109;pinno=18

A109-18 (STA) - ST NO. 1 relay terminal 2

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 TABLE202111,999999,_51,_111803,_0509671,RM100000002064N,

REPAIR OR REPLACE HARNESS OR CONNECTOR