DTC B1178:11 [BCM]

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Malfunction Location

• Liftgate latch switch circuit malfunction

Detection Condition

• Short to ground in wiring harness between liftgate latch switch in liftgate latch and lock actuator and BCM

Possible Causes

• DTC inspection is performed with liftgate latch switch on

• Connection malfunction with connector

• Short circuit to ground in wiring harness between liftgate latch and lock actuator terminal C and BCM terminal 7S

• Liftgate latch and lock actuator malfunction

• 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].)

•  Close the liftgate. (Liftgate latch switch off)

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

•  Is DTC B1178:11 displayed?

Yes

Go to the next step.

No

DTC troubleshooting completed.

2

VERIFY LIFTGATE LATCH AND LOCK ACTUATOR CONNECTOR CONDITION

•  Disconnect the negative battery cable.

•  Disconnect the liftgate latch and lock actuator 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 LIFTGATE LATCH AND LOCK ACTUATOR CONDITION

•  Remove the liftgate latch switch.
(See LIFTGATE LATCH AND LOCK ACTUATOR REMOVAL/INSTALLATION.)

•  Inspect the liftgate latch switch.
(See LIFTGATE LATCH SWITCH INSPECTION.)

•  Is the liftgate latch switch normal?

Yes

Go to the next step.

No

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

(See LIFTGATE 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 WIRING HARNESS BETWEEN LIFTGATE LATCH AND LOCK ACTUATOR AND BCM FOR SHORT TO GROUND

•  Inspect for continuity between BCM terminal 7S and body ground.

•  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 TROUBLESHOOTING COMPLETED

•  Connect all the connectors.

•  Connect the battery cable.

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

•  Close the liftgate. (Liftgate latch switch off)

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

•  Is DTC B1178:11 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].) • Close the liftgate. (Liftgate latch switch off) • Perform the BCM DTC inspection using the M-MDS. (See DTC INSPECTION [BCM].) • Is DTC B1178:11 displayed?	Yes	Go to the next step.
1		No	DTC troubleshooting completed.
2	VERIFY LIFTGATE LATCH AND LOCK ACTUATOR CONNECTOR CONDITION • Disconnect the negative battery cable. • Disconnect the liftgate latch and lock actuator 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 LIFTGATE LATCH AND LOCK ACTUATOR CONDITION • Remove the liftgate latch switch. (See LIFTGATE LATCH AND LOCK ACTUATOR REMOVAL/INSTALLATION.) • Inspect the liftgate latch switch. (See LIFTGATE LATCH SWITCH INSPECTION.) • Is the liftgate latch switch normal?	Yes	Go to the next step.
3		No	Replace the liftgate latch and lock actuator, then go to the final step. (See LIFTGATE 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 WIRING HARNESS BETWEEN LIFTGATE LATCH AND LOCK ACTUATOR AND BCM FOR SHORT TO GROUND • Inspect for continuity between BCM terminal 7S and body ground. • 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 TROUBLESHOOTING COMPLETED • Connect all the connectors. • Connect the battery cable. • Clear DTCs using the M-MDS. (See CLEARING DTC [BCM].) • Close the liftgate. (Liftgate latch switch off) • Perform the BCM DTC inspection using the M-MDS. (See DTC INSPECTION [BCM].) • Is DTC B1178:11 displayed?	Yes	Replace the BCM. (See BODY CONTROL MODULE (BCM) REMOVAL/INSTALLATION.)
6		No	DTC troubleshooting completed.