DTC B1172:13 [BCM]

id0902f5068700

Description

Front door lock-link switch (driver's side) unlock circuit malfunction

Detection condition

•  BCM detects an open circuit in the front door lock-link switch (driver's side) unlock circuit with the front door lock-link switch (driver's side) unlocked.

Fail-safe

Not applicable

Possible cause

•  Front door latch and lock actuator (driver's side) connector or terminal malfunction

•  Open circuit in wiring harness between the following:

―  Front door latch and lock actuator (LH) terminal J—Body ground (L.H.D.)

―  Front door latch and lock actuator (RH) terminal D—Body ground (R.H.D.)

•  Front door lock-link switch (driver's side) malfunction

•  BCM connector or terminal malfunction

•  Open circuit in wiring harness between the following terminals:

―  Front door latch and lock actuator (LH) terminal B—BCM terminal 2B (L.H.D.)

―  Front door latch and lock actuator (RH) terminal L—BCM terminal 2B (R.H.D.)

•  BCM malfunction

Description	Front door lock-link switch (driver's side) unlock circuit malfunction
Detection condition	• BCM detects an open circuit in the front door lock-link switch (driver's side) unlock circuit with the front door lock-link switch (driver's side) unlocked.
Fail-safe	Not applicable
Possible cause	• Front door latch and lock actuator (driver's side) connector or terminal malfunction • Open circuit in wiring harness between the following: ― Front door latch and lock actuator (LH) terminal J—Body ground (L.H.D.) ― Front door latch and lock actuator (RH) terminal D—Body ground (R.H.D.) • Front door lock-link switch (driver's side) malfunction • BCM connector or terminal malfunction • Open circuit in wiring harness between the following terminals: ― Front door latch and lock actuator (LH) terminal B—BCM terminal 2B (L.H.D.) ― Front door latch and lock actuator (RH) terminal L—BCM terminal 2B (R.H.D.) • BCM malfunction

Diagnostic Procedure

Step	Inspection		Action
1	VERIFY BCM DTCs AGAIN • Clear the DTC for the BCM using the M-MDS. (See CLEARING DTC [BCM].) • Lock/unlock all the doors by operating the driver’s door lock knob. • Retrieve the BCM DTCs using the M-MDS with the front door lock-link switch (driver's side) unlocked. (See DTC INSPECTION [BCM].) • Is the same DTC displayed?	Yes	Go to the next step.
1		No	Go to Step 9.
2	VERIFY OTHER BCM DTCs AGAIN • Clear the DTC for the BCM using the M-MDS. (See CLEARING DTC [BCM].) • Retrieve the BCM DTCs using the M-MDS with the front door lock-link switch (driver's side) locked. (See DTC INSPECTION [BCM].) • Is DTC B126A:11 or B126A:13 displayed?	Yes	Repair or replace the malfunctioning part according to the applicable DTC troubleshooting. (See DTC TABLE [BCM].)
2		No	Go to the next step.
3	INSPECT FRONT DOOR LATCH AND LOCK ACTUATOR (DRIVER'S SIDE) CONNECTOR CONDITION • Switch the ignition off. • Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.) • Disconnect the front door latch and lock actuator (driver's side) connector. • Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection. • Is the connector normal?	Yes	Go to the next step.
3		No	Repair or replace the connector, then go to Step 8.
4	INSPECT FRONT DOOR LOCK-LINK SWITCH (DRIVER'S SIDE) GROUND CIRCUIT FOR OPEN CIRCUIT • Verify that the front door latch and lock actuator (driver's side) connector is disconnected. • Inspect for continuity between the following terminal (wiring harness-side) and body ground: ― Front door latch and lock actuator (LH) terminal J (L.H.D.) ― Front door latch and lock actuator (RH) terminal D (R.H.D.) • Is there continuity?	Yes	Go to the next step.
4		No	Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals: • Front door latch and lock actuator (LH) terminal J—Body ground (L.H.D.) • Front door latch and lock actuator (RH) terminal D—Body ground (R.H.D.) If there is a common connector: • Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for an open circuit. • Repair or replace the malfunctioning part. If there is no common connector: • Repair or replace the wiring harness which has an open circuit. Go to Step 8.
5	INSPECT FRONT DOOR LOCK-LINK SWITCH (DRIVER'S SIDE) • Inspect the front door lock-link switch (driver's side). (See FRONT DOOR LOCK-LINK SWITCH INSPECTION.) • Is the front door lock-link switch (driver's side) normal?	Yes	Go to the next step.
5		No	Replace the front door latch and lock actuator (driver's side), then go to Step 8. (See FRONT DOOR LATCH AND LOCK ACTUATOR REMOVAL/INSTALLATION.)
6	INSPECT BCM CONNECTOR CONDITION • Disconnect the BCM connector. • Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection. • Is the connector normal?	Yes	Go to the next step.
6		No	Repair or replace the connector, then go to Step 8.
7	INSPECT FRONT DOOR LOCK-LINK SWITCH (DRIVER'S SIDE) UNLOCK CIRCUIT FOR OPEN CIRCUIT • Verify that the front door latch and lock actuator (driver's side) and BCM connectors are disconnected. • Inspect for continuity between the following terminals (wiring harness-side): ― Front door latch and lock actuator (LH) terminal B—BCM terminal 2B (L.H.D.) ― Front door latch and lock actuator (RH) terminal L—BCM terminal 2B (R.H.D.) • Is there continuity?	Yes	Go to the next step.
7		No	Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals: • Front door latch and lock actuator (LH) terminal B—BCM terminal 2B (L.H.D.) • Front door latch and lock actuator (RH) terminal L—BCM terminal 2B (R.H.D.) If there is a common connector: • Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for an open circuit. • Repair or replace the malfunctioning part. If there is no common connector: • Repair or replace the wiring harness which has an open circuit. Go to the next step.
8	VERIFY THAT REPAIRS HAVE BEEN COMPLETED • Always reconnect all disconnected connectors. • Connect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.) • Clear the DTC for the BCM using the M-MDS. (See CLEARING DTC [BCM].) • Lock/unlock all the doors by operating the driver’s door lock knob. • Retrieve the BCM DTCs using the M-MDS with the front door lock-link switch (driver's side) unlocked. (See DTC INSPECTION [BCM].) • Is the same DTC displayed?	Yes	Repeat the inspection from Step 1. • If the malfunction recurs, replace the BCM. (See BODY CONTROL MODULE (BCM) REMOVAL/INSTALLATION.) Go to the next step.
8		No	Go to the next step.
9	VERIFY IF OTHER DTCs DISPLAYED • Are any other DTCs displayed?	Yes	Repair or replace the malfunctioning part according to the applicable DTC troubleshooting. (See DTC TABLE [BCM].)
9		No	DTC troubleshooting completed.