DTC B1172:92 [BCM]

id0902f5340600

Malfunction Location

• Door lock link switch circuit malfunction

Detection Condition

• Lock/unlock signals are input simultaneously for 6 s or more

Possible Causes

• Connection malfunction with connector

• Short to ground in wiring harness between front door latch and lock actuator terminal J and BCM terminal 7K

• Short to ground in wiring harness between front door latch and lock actuator terminal L and BCM terminal 7Q

• Front door latch and lock actuator malfunction

• Short circuit in lock signal and unlock signal wiring harnesses of front door latch and lock actuator

• Open circuit between front door latch and lock actuator terminal D and body ground

• BCM malfunction

System Wiring Diagram

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Diagnostic Procedure

Step

Inspection

Action

1

PERFORM DTC INSPECTION

•  Clear DTCs using the M-MDS.
(See CLEARING DTC [BCM].)

•  Perform locking and unlocking operation.

•  Perform the BCM DTC inspection using the M-MDS.
(See DTC INSPECTION [BCM].)

•  Is DTC B1172:92 displayed?

Yes

Go to the next step.

No

DTC troubleshooting completed.

2

VERIFY FRONT DOOR LATCH AND LOCK ACTUATOR CONNECTOR CONDITION

•  Disconnect the negative battery cable.

•  Disconnect the lock link switch connector.

•  Inspect the connection condition and wiring harness.

•  Are the connector terminals normal without damage, deformation, corrosion, or disconnection?

Yes

Go to the next step.

No

Repair or replace the connector, then go to the final step.

3

VERIFY DOOR LOCK LINK SWITCH GROUND CIRCUIT CONDITION

•  Inspect for continuity between front door latch and lock actuator terminal D and body ground.

•  Is there continuity?

Yes

Go to the next step.

No

Repair or replace the related wiring harness, then go to the final step.

4

VERIFY DOOR LOCK LINK SWITCH CONDITION

•  Remove the front door latch and lock actuator.
(See FRONT DOOR LATCH AND LOCK ACTUATOR REMOVAL/INSTALLATION.)

•  Inspect the door lock link switch.
(See DOOR LOCK-LINK SWITCH INSPECTION.)

•  Is the door lock link switch normal?

Yes

Go to the next step.

No

Replace the front door latch and lock actuator, then go to the final step.

(See FRONT DOOR LATCH AND LOCK ACTUATOR REMOVAL/INSTALLATION.)

5

VERIFY BCM CONNECTOR CONDITION

•  Disconnect the BCM connector.

•  Inspect the connection condition and wiring harness.

•  Are the connector terminals normal without damage, deformation, corrosion, or disconnection?

Yes

Go to the next step.

No

Repair or replace the connector, then go to the final step.

6

VERIFY FOR SHORT CIRCUIT TO GROUND IN WIRING HARNESS BETWEEN FRONT DOOR LATCH AND LOCK ACTUATOR AND BCM

•  Inspect for continuity between the following terminals and body ground.

―  BCM terminal 7K

―  BCM terminal 7Q

•  Is there continuity?

Yes

Repair or replace the related wiring harness, then go to the final step.

No

Go to the next step.

7

VERIFY FOR SHORT CIRCUIT IN LOCK AND UNLOCK SIGNAL WIRING HARNESSES

•  Inspect for continuity between BCM terminal 7K and BCM terminal 7Q, or front door latch and lock actuator terminal J and front door latch and lock actuator terminal L.

•  Is there continuity?

Yes

Repair or replace the related wiring harness, then go to the final step.

No

Go to the next step.

8

VERIFY TROUBLESHOOTING COMPLETED

•  Connect all the connectors.

•  Connect the battery cable.

•  Clear DTCs using the M-MDS.
(See CLEARING DTC [BCM].)

•  Perform locking and unlocking operation.

•  Perform the BCM DTC inspection using the M-MDS.
(See DTC INSPECTION [BCM].)

•  Is DTC B1172:92 displayed?

Yes

Replace the BCM.

(See BODY CONTROL MODULE (BCM) REMOVAL/INSTALLATION.)

No

DTC troubleshooting completed.

Step	Inspection		Action
1	PERFORM DTC INSPECTION • Clear DTCs using the M-MDS. (See CLEARING DTC [BCM].) • Perform locking and unlocking operation. • Perform the BCM DTC inspection using the M-MDS. (See DTC INSPECTION [BCM].) • Is DTC B1172:92 displayed?	Yes	Go to the next step.
1		No	DTC troubleshooting completed.
2	VERIFY FRONT DOOR LATCH AND LOCK ACTUATOR CONNECTOR CONDITION • Disconnect the negative battery cable. • Disconnect the lock link switch connector. • Inspect the connection condition and wiring harness. • Are the connector terminals normal without damage, deformation, corrosion, or disconnection?	Yes	Go to the next step.
2		No	Repair or replace the connector, then go to the final step.
3	VERIFY DOOR LOCK LINK SWITCH GROUND CIRCUIT CONDITION • Inspect for continuity between front door latch and lock actuator terminal D and body ground. • Is there continuity?	Yes	Go to the next step.
3		No	Repair or replace the related wiring harness, then go to the final step.
4	VERIFY DOOR LOCK LINK SWITCH CONDITION • Remove the front door latch and lock actuator. (See FRONT DOOR LATCH AND LOCK ACTUATOR REMOVAL/INSTALLATION.) • Inspect the door lock link switch. (See DOOR LOCK-LINK SWITCH INSPECTION.) • Is the door lock link switch normal?	Yes	Go to the next step.
4		No	Replace the front door latch and lock actuator, then go to the final step. (See FRONT DOOR LATCH AND LOCK ACTUATOR REMOVAL/INSTALLATION.)
5	VERIFY BCM CONNECTOR CONDITION • Disconnect the BCM connector. • Inspect the connection condition and wiring harness. • Are the connector terminals normal without damage, deformation, corrosion, or disconnection?	Yes	Go to the next step.
5		No	Repair or replace the connector, then go to the final step.
6	VERIFY FOR SHORT CIRCUIT TO GROUND IN WIRING HARNESS BETWEEN FRONT DOOR LATCH AND LOCK ACTUATOR AND BCM • Inspect for continuity between the following terminals and body ground. ― BCM terminal 7K ― BCM terminal 7Q • Is there continuity?	Yes	Repair or replace the related wiring harness, then go to the final step.
6		No	Go to the next step.
7	VERIFY FOR SHORT CIRCUIT IN LOCK AND UNLOCK SIGNAL WIRING HARNESSES • Inspect for continuity between BCM terminal 7K and BCM terminal 7Q, or front door latch and lock actuator terminal J and front door latch and lock actuator terminal L. • Is there continuity?	Yes	Repair or replace the related wiring harness, then go to the final step.
7		No	Go to the next step.
8	VERIFY TROUBLESHOOTING COMPLETED • Connect all the connectors. • Connect the battery cable. • Clear DTCs using the M-MDS. (See CLEARING DTC [BCM].) • Perform locking and unlocking operation. • Perform the BCM DTC inspection using the M-MDS. (See DTC INSPECTION [BCM].) • Is DTC B1172:92 displayed?	Yes	Replace the BCM. (See BODY CONTROL MODULE (BCM) REMOVAL/INSTALLATION.)
8		No	DTC troubleshooting completed.