DTC B1140:29 [ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM]

id09021c950000

DESCRIPTION

Erratic signal of starter interlock switch
DETECTION CONDITION
•  The starter interlock switch condition remains off even though the keyless control module receives a CAN restart command signal while the i-stop is operating.
POSSIBLE CAUSE
•  Starter interlock switch connector or terminals malfunction
•  Open circuit in wiring harness between the following terminals:
―  Starter interlock switch terminal B—Body ground
•  Starter interlock switch malfunction
•  PCM connector or terminals malfunction
•  Keyless control module connector or terminals malfunction
•  Short to power supply in wiring harness between the following terminals:
―  Starter interlock switch terminal A—PCM terminal 1S
―  Starter interlock switch terminal A—Keyless control module terminal 3O
•  Open circuit in wiring harness between the following terminals:
―  Starter interlock switch terminal A—PCM terminal 1S
―  Starter interlock switch terminal A—Keyless control module terminal 3O
•  PCM malfunction
•  Keyless control module malfunction

Diagnostic Procedure

Step

Inspection

Action
1
VERIFY RELATED STORED DTC
•  Perform the advanced keyless entry and push button start system DTC inspection using the M-MDS.
•  Is the DTC U0001:88 or U0100:00 also present?
Yes
Go to the applicable DTC inspection.
(See FOREWORD [MULTIPLEX COMMUNICATION SYSTEM (L.H.D. (MZR 2.0 DISI i-stop))].)
(See FOREWORD [MULTIPLEX COMMUNICATION SYSTEM (R.H.D. (MZR 2.0 DISI i-stop))].)
No
Go to the next step.
2
INSPECT STARTER INTERLOCK SWITCH CONNECTOR AND TERMINALS
•  Switch the ignition to off.
•  Disconnect the negative battery cable.
•  Disconnect the starter interlock switch connector.
•  Inspect the connector and terminals (corrosion, damage, pin disconnection).
•  Is there any malfunction?
Yes
Repair or replace the connector or terminals, then go to Step 10.
No
Go to the next step.
3
INSPECT STARTER INTERLOCK SWITCH GROUND CIRCUIT FOR OPEN CIRCUIT
•  Starter interlock switch connector is disconnected.
•  Inspect for continuity between the following terminal (wiring harness-side) and body ground:
―  Starter interlock switch terminal B
•  Is there continuity?
Yes
Go to the next step.
No
Repair or replace the wiring harness for a possible open circuit, then go to Step 10.
4
INSPECT STARTER INTERLOCK SWITCH
•  Inspect the starter interlock switch.
•  Is there any malfunction?
Yes
Replace the starter interlock switch, then go to Step 10.
No
Go to the next step.
5
INSPECT PCM CONNECTOR AND TERMINALS
•  Disconnect the PCM connector.
•  Inspect the connector and terminals (corrosion, damage, pin disconnection).
•  Is there any malfunction?
Yes
Repair or replace the connector or terminals, then go to Step 10.
No
Go to the next step.
6
INSPECT KEYLESS CONTROL MODULE CONNECTOR AND TERMINALS
•  Disconnect the keyless control module connector.
•  Inspect the connector and terminals (corrosion, damage, pin disconnection).
•  Is there any malfunction?
Yes
Repair or replace the connector or terminals, then go to Step 10.
No
Go to the next step.
7
INSPECT STARTER INTERLOCK SWITCH CIRCUIT FOR SHORT TO POWER SUPPLY
•  Starter interlock switch, PCM and keyless control module connectors are disconnected.
•  Reconnect the negative battery cable.
•  Switch the ignition to ON.
•  Measure the voltage at the following terminal (wiring harness-side):
―  Starter interlock switch terminal A
•  Is there any voltage?
Yes
Repair or replace the wiring harness for a possible short to power supply, then go to Step 10.
No
Go to the next step.
8
INSPECT STARTER INTERLOCK SWITCH CIRCUIT FOR OPEN CIRCUIT
•  Starter interlock switch, PCM and keyless control module connectors are disconnected.
•  Switch the ignition to off.
•  Disconnect the negative battery cable.
•  Inspect for continuity between the following terminals (wiring harness-side):
―  Starter interlock switch terminal A—PCM terminal 1S
―  Starter interlock switch terminal A—Keyless control module terminal 3O
•  Is there continuity?
Yes
Go to the next step.
No
Repair or replace the wiring harness for a possible open circuit, then go to Step 10.
9
INSPECT PCM
•  Reconnect the starter interlock switch, PCM and keyless control module connectors.
•  Reconnect the negative battery cable.
•  Measure the voltage at the following terminal (wiring harness-side):
―  PCM terminal 1S
•  Is the voltage normal?
Yes
Go to the next step.
No
Replace the PCM, then go to the next step.
(See PCM REMOVAL/INSTALLATION [MZR 2.0 DISI i-stop].)
10
VERIFY TROUBLESHOOTING COMPLETED
•  Make sure to reconnect the disconnected connectors.
•  Reconnect the negative battery cable.
•  Operate the advanced key to activate the keyless control module.
•  Clear the DTC from the keyless control module using the M-MDS.
•  Start the engine using the i-stop.
•  Perform the advanced keyless entry and push button start system DTC inspection using the M-MDS.
•  Is the same DTC present?
Yes
Replace the keyless control module, then go to the next step.
(See KEYLESS CONTROL MODULE REMOVAL/INSTALLATION.)
No
Go to the next step.
11
VERIFY THAT NO OTHER DTCs ARE PRESENT
•  Are any DTCs present?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM].)
No
DTC troubleshooting completed.