DTC B1172:92 [BCM]

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Malfunction Location

• Door lock-link switch circuit malfunction

Detection Condition

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

Possible Causes

• Front door latch and lock actuator (driver’s side) connector or terminals malfunction

• Door lock-link switch (driver’s side) malfunction

• BCM connector or terminals malfunction

• Short to ground in wiring harness between front door latch and lock actuator (driver’s side) terminal J and BCM terminal 7K

• Short to ground in wiring harness between front door latch and lock actuator (driver’s side) terminal L and BCM terminal 7Q

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

• BCM malfunction

System Wiring Diagram

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Diagnostic Procedure

Step

Inspection

Action

1

PERFORM DTC INSPECTION

•  Clear the 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 the DTC B1172:92 displayed?

Yes

Go to the next step.

No

DTC troubleshooting completed.

2

VERIFY FRONT DOOR LATCH AND LOCK ACTUATOR (DRIVER’S SIDE) CONNECTOR CONDITION

•  Turn the ignition switch to the LOCK position.

•  Disconnect the negative battery cable.

•  Disconnect the front door latch and lock actuator (driver’s side) 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 (DRIVER’S SIDE) CONDITION

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

•  Is the door lock-link switch (driver’s side) normal?

Yes

Go to the next step.

No

Replace the front door latch and lock actuator (driver’s side), then go to the final step.

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

4

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.

5

VERIFY FOR SHORT TO GROUND IN WIRING HARNESS BETWEEN FRONT DOOR LATCH AND LOCK ACTUATOR (DRIVER’S SIDE) AND BCM

•  Front door latch and lock actuator (driver’s side) and BCM connectors are disconnected.

•  Inspect for continuity between the following terminals (wiring harness-side) 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.

6

VERIFY FOR SHORT CIRCUIT IN LOCK AND UNLOCK SIGNAL WIRING HARNESSES

•  Front door latch and lock actuator (driver’s side) and BCM connectors are disconnected.

•  Inspect for continuity between front door latch and lock actuator (driver’s side) terminals J and L (wiring harness-side).

•  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 TROUBLESHOOTING COMPLETED

•  Reconnect all disconnected connectors.

•  Reconnect the negative battery cable.

•  Clear the 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 the 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 the 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 the DTC B1172:92 displayed?	Yes	Go to the next step.
1		No	DTC troubleshooting completed.
2	VERIFY FRONT DOOR LATCH AND LOCK ACTUATOR (DRIVER’S SIDE) CONNECTOR CONDITION • Turn the ignition switch to the LOCK position. • Disconnect the negative battery cable. • Disconnect the front door latch and lock actuator (driver’s side) 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 (DRIVER’S SIDE) CONDITION • Inspect the door lock-link switch (driver’s side). (See DOOR LOCK-LINK SWITCH INSPECTION.) • Is the door lock-link switch (driver’s side) normal?	Yes	Go to the next step.
3		No	Replace the front door latch and lock actuator (driver’s side), then go to the final step. (See FRONT DOOR LATCH AND LOCK ACTUATOR REMOVAL/INSTALLATION.)
4	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.
4		No	Repair or replace the connector, then go to the final step.
5	VERIFY FOR SHORT TO GROUND IN WIRING HARNESS BETWEEN FRONT DOOR LATCH AND LOCK ACTUATOR (DRIVER’S SIDE) AND BCM • Front door latch and lock actuator (driver’s side) and BCM connectors are disconnected. • Inspect for continuity between the following terminals (wiring harness-side) 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.
5		No	Go to the next step.
6	VERIFY FOR SHORT CIRCUIT IN LOCK AND UNLOCK SIGNAL WIRING HARNESSES • Front door latch and lock actuator (driver’s side) and BCM connectors are disconnected. • Inspect for continuity between front door latch and lock actuator (driver’s side) terminals J and L (wiring harness-side). • 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 TROUBLESHOOTING COMPLETED • Reconnect all disconnected connectors. • Reconnect the negative battery cable. • Clear the 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 the DTC B1172:92 displayed?	Yes	Replace the BCM. (See BODY CONTROL MODULE (BCM) REMOVAL/INSTALLATION.)
7		No	DTC troubleshooting completed.