DTC B1178:11 [BCM]

id0902f5340900

3HB/5HB

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.

• Liftgate latch and lock actuator connector or terminals malfunction

• Liftgate latch switch malfunction

• BCM connector or terminals malfunction

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

• 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].)

•  Close the liftgate (liftgate latch switch off).

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

•  Is the DTC B1178:11 displayed?

Yes

Go to the next step.

No

DTC troubleshooting completed.

2

VERIFY LIFTGATE LATCH AND LOCK ACTUATOR CONNECTOR CONDITION

•  Turn the ignition switch to the LOCK position.

•  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 SWITCH CONDITION

•  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

•  Liftgate latch and lock actuator and BCM connectors are disconnected.

•  Inspect for continuity between BCM terminal 7S (wiring harness-side) 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

•  Reconnect all disconnected connectors.

•  Reconnect the negative battery cable.

•  Clear the 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 the 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 the 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 the DTC B1178:11 displayed?	Yes	Go to the next step.
No	DTC troubleshooting completed.
2	VERIFY LIFTGATE LATCH AND LOCK ACTUATOR CONNECTOR CONDITION • Turn the ignition switch to the LOCK position. • 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 SWITCH CONDITION • 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 • Liftgate latch and lock actuator and BCM connectors are disconnected. • Inspect for continuity between BCM terminal 7S (wiring harness-side) 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 • Reconnect all disconnected connectors. • Reconnect the negative battery cable. • Clear the 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 the DTC B1178:11 displayed?	Yes	Replace the BCM. (See BODY CONTROL MODULE (BCM) REMOVAL/INSTALLATION.)
No	DTC troubleshooting completed.

4SD

Malfunction Location

• Trunk lid latch switch circuit malfunction

Detection Condition

• Short to ground in wiring harness between trunk lid latch switch and BCM

Possible Causes

• DTC inspection is performed with trunk lid latch switch on.

• Trunk lid latch switch connector or terminals malfunction

• Trunk lid latch switch malfunction

• BCM connector or terminals malfunction

• Short to ground in wiring harness between trunk lid latch switch terminal A and BCM terminal 7S

• 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].)

•  Close the trunk (trunk lid latch switch off).

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

•  Is the DTC B1178:11 displayed?

Yes

Go to the next step.

No

DTC troubleshooting completed.

2

VERIFY TRUNK LID LATCH SWITCH CONNECTOR CONDITION

•  Turn the ignition switch to the LOCK position.

•  Disconnect the negative battery cable.

•  Disconnect the trunk lid latch 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 TRUNK LID LATCH SWITCH CONDITION

•  Inspect the trunk lid latch switch.
(See TRUNK LID LATCH AND RELEASE ACTUATOR INSPECTION.)

•  Is the trunk lid latch switch normal?

Yes

Go to the next step.

No

Replace the trunk lid latch switch, then go to the final step.

(See TRUNK LID LATCH AND RELEASE 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 TRUNK LID LATCH SWITCH AND BCM FOR SHORT TO GROUND

•  Trunk lid latch switch and BCM connectors are disconnected.

•  Inspect for continuity between BCM terminal 7S (wiring harness-side) 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

•  Reconnect all disconnected connectors.

•  Reconnect the negative battery cable.

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

•  Close the trunk (trunk lid latch switch off).

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

•  Is the DTC B1178:11 displayed?

Yes

Replace the BCM.

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

No

DTC troubleshooting completed.