DTC B1178:11 [BCM]

id0902f5340900

4SD

Malfunction Location

• Trunk lid latch switch circuit malfunction

Detection Condition

• Short to ground detected in trunk lid latch switch circuit with the trunk closed (trunk lid latch switch off)

Possible Causes

• Short circuit to ground in wiring harness between trunk lid latch switch connector terminal C and BCM connector terminal 6C

• Short circuit to ground in wiring harness between trunk compartment light connector terminal B and BCM connector terminal 6C

• Trunk lid latch switch malfunction

• BCM malfunction

System Wiring Diagram

am6zzw00002036

Diagnostic Procedure

Step

Inspection

Action

1

PERFORM DTC INSPECTION

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

•  Perform the BCM DTC inspection using the M-MDS with the trunk closed (trunk lid latch switch off).
(See DTC INSPECTION [BCM].)

•  Is DTC B1178:11 displayed?

Yes

Go to the next step.

No

DTC troubleshooting completed.

2

INSPECT TRUNK LID LATCH SWITCH CONNECTOR CONDITION

•  Switch the ignition to off.

•  Disconnect the negative battery cable.

•  Disconnect the trunk lid latch switch connector.

•  Inspect the connector and terminals (corrosion, damage, pin disconnection).

•  Is the connector normal?

Yes

Go to the next step.

No

Repair/replace the connector or terminal.

After repair procedure, go to Step 6.

3

INSPECT TRUNK LID LATCH SWITCH

•  Inspect the trunk lid latch switch.
(See TRUNK LID LATCH SWITCH INSPECTION.)

•  Is the trunk lid latch switch normal?

Yes

Go to the next step.

No

Replace the trunk lid latch switch.

(See TRUNK LID LATCH AND LOCK ACTUATOR REMOVAL/INSTALLATION.)

After replacement, go to Step 6.

4

INSPECT BCM CONNECTOR CONDITION

•  Disconnect the BCM connector.

•  Inspect the connector and terminals (corrosion, damage, pin disconnection).

•  Is the connector normal?

Yes

Go to the next step.

No

Repair/replace the connector or terminal.

After repair procedure, go to Step 6.

5

INSPECT TRUNK LID LATCH SWITCH CIRCUIT FOR SHORT CIRCUIT TO GROUND

•  Inspect for continuity between trunk lid latch switch connector terminal C and body ground.

•  Is there continuity?

Yes

Repair/replace the wiring harness.

After repair procedure, go to the next step.

No

Go to the next step.

6

VERIFY DTC

•  Reconnect the disconnected connectors and the negative battery cable.

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

•  Perform the BCM DTC inspection using the M-MDS with the trunk closed (trunk lid latch switch off).
(See DTC INSPECTION [BCM].)

•  Is the same DTC present?

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.

No

Go to the next step.

7

VERIFY THAT NO OTHER DTCs ARE PRESENT

•  Are there other DTCs output?

Yes

Perform the corresponding DTC inspection.

No

DTC troubleshooting completed.

Step	Inspection	Action
1	PERFORM DTC INSPECTION • Clear DTCs using the M-MDS. (See CLEARING DTC [BCM].) • Perform the BCM DTC inspection using the M-MDS with the trunk closed (trunk lid latch switch off). (See DTC INSPECTION [BCM].) • Is DTC B1178:11 displayed?	Yes	Go to the next step.
No	DTC troubleshooting completed.
2	INSPECT TRUNK LID LATCH SWITCH CONNECTOR CONDITION • Switch the ignition to off. • Disconnect the negative battery cable. • Disconnect the trunk lid latch switch connector. • Inspect the connector and terminals (corrosion, damage, pin disconnection). • Is the connector normal?	Yes	Go to the next step.
No	Repair/replace the connector or terminal. After repair procedure, go to Step 6.
3	INSPECT TRUNK LID LATCH SWITCH • Inspect the trunk lid latch switch. (See TRUNK LID LATCH SWITCH INSPECTION.) • Is the trunk lid latch switch normal?	Yes	Go to the next step.
No	Replace the trunk lid latch switch. (See TRUNK LID LATCH AND LOCK ACTUATOR REMOVAL/INSTALLATION.) After replacement, go to Step 6.
4	INSPECT BCM CONNECTOR CONDITION • Disconnect the BCM connector. • Inspect the connector and terminals (corrosion, damage, pin disconnection). • Is the connector normal?	Yes	Go to the next step.
No	Repair/replace the connector or terminal. After repair procedure, go to Step 6.
5	INSPECT TRUNK LID LATCH SWITCH CIRCUIT FOR SHORT CIRCUIT TO GROUND • Inspect for continuity between trunk lid latch switch connector terminal C and body ground. • Is there continuity?	Yes	Repair/replace the wiring harness. After repair procedure, go to the next step.
No	Go to the next step.
6	VERIFY DTC • Reconnect the disconnected connectors and the negative battery cable. • Clear DTCs using the M-MDS. (See CLEARING DTC [BCM].) • Perform the BCM DTC inspection using the M-MDS with the trunk closed (trunk lid latch switch off). (See DTC INSPECTION [BCM].) • Is the same DTC present?	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.
No	Go to the next step.
7	VERIFY THAT NO OTHER DTCs ARE PRESENT • Are there other DTCs output?	Yes	Perform the corresponding DTC inspection.
No	DTC troubleshooting completed.

5HB

Malfunction Location

• Liftgate latch switch circuit malfunction

Detection Condition

• Short to ground detected in liftgate latch switch circuit with the liftgate closed (liftgate latch switch off)

Possible Causes

• Short circuit to ground in wiring harness between liftgate latch switch connector terminal A and BCM connector terminal 6C

• Short circuit to ground in wiring harness between liftgate auto closure control module connector terminal 2B and BCM connector terminal 6C

• Short circuit to ground in wiring harness between cargo compartment light connector terminal B and BCM connector terminal 6C

• Liftgate latch switch malfunction

• Liftgate auto closure control module malfunction

• BCM malfunction

System Wiring Diagram

am6zzw00002037

Diagnostic Procedure

Step

Inspection

Action

1

PERFORM DTC INSPECTION

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

•  Perform the BCM DTC inspection using the M-MDS with the liftgate closed (liftgate latch switch off).
(See DTC INSPECTION [BCM].)

•  Is DTC B1178:11 displayed?

Yes

Go to the next step.

No

DTC troubleshooting completed.

2

INSPECT LIFTGATE LATCH SWITCH CONNECTOR CONDITION

•  Switch the ignition to off.

•  Disconnect the negative battery cable.

•  Disconnect the liftgate latch switch connector.

•  Inspect the connector and terminals (corrosion, damage, pin disconnection).

•  Is the connector normal?

Yes

Go to the next step.

No

Repair/replace the connector or terminal.

After repair procedure, go to Step 8.

3

INSPECT LIFTGATE LATCH SWITCH

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

•  Is the switch normal?

Yes

Go to the next step.

No

Replace the liftgate latch switch.

(See LIFTGATE LATCH AND LOCK MOTOR REMOVAL/INSTALLATION.)

After replacement, go to Step 8.

4

INSPECT LIFTGATE AUTO CLOSURE CONTROL MODULE CONNECTOR CONDITION

•  Disconnect the liftgate auto closure control module connector.

•  Inspect the connector and terminals
(corrosion, damage, pin disconnection).

•  Is the connector normal?

Yes

Go to the next step.

No

Repair/replace the connector or terminal.

After repair procedure, go to Step 8.

5

INSPECT BCM CONNECTOR CONDITION

•  Disconnect the BCM connector.

•  Inspect the connector and terminals (corrosion, damage, pin disconnection).

•  Is the connector normal?

Yes

Go to the next step.

No

Repair/replace the connector or terminal.

After repair procedure, go to Step 8.

6

INSPECT LIFTGATE LATCH SWITCH CIRCUIT FOR SHORT CIRCUIT TO GROUND

•  Inspect for continuity between liftgate latch switch connector terminal A and body ground.

•  Is there continuity?

Yes

Repair/replace the wiring harness.

After repair procedure, go to Step 8.

No

Go to the next step.

7

INSPECT LIFTGATE AUTO CLOSURE CONTROL MODULE

•  Inspect the liftgate auto closure control module.
(See LIFTGATE AUTO CLOSURE CONTROL MODULE INSPECTION.)

•  Is the liftgate auto closure control module normal?

Yes

Go to the next step.

No

Replace the liftgate auto closure control module.

(See LIFTGATE AUTO CLOSURE CONTROL MODULE REMOVAL/INSTALLATION.)

After replacement, go to the next step.

8

VERIFY DTC

•  Reconnect the disconnected connectors and the negative battery cable.

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

•  Perform the BCM DTC inspection using the M-MDS with the liftgate closed (liftgate latch switch off).
(See DTC INSPECTION [BCM].)

•  Is the same DTC present?

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.

No

Go to the next step.

9

VERIFY THAT NO OTHER DTCs ARE PRESENT

•  Are there other DTCs output?

Yes

Perform the corresponding DTC inspection.

No

DTC troubleshooting completed.

Step	Inspection	Action
1	PERFORM DTC INSPECTION • Clear DTCs using the M-MDS. (See CLEARING DTC [BCM].) • Perform the BCM DTC inspection using the M-MDS with the liftgate closed (liftgate latch switch off). (See DTC INSPECTION [BCM].) • Is DTC B1178:11 displayed?	Yes	Go to the next step.
No	DTC troubleshooting completed.
2	INSPECT LIFTGATE LATCH SWITCH CONNECTOR CONDITION • Switch the ignition to off. • Disconnect the negative battery cable. • Disconnect the liftgate latch switch connector. • Inspect the connector and terminals (corrosion, damage, pin disconnection). • Is the connector normal?	Yes	Go to the next step.
No	Repair/replace the connector or terminal. After repair procedure, go to Step 8.
3	INSPECT LIFTGATE LATCH SWITCH • Inspect the liftgate latch switch. (See LIFTGATE LATCH SWITCH INSPECTION.) • Is the switch normal?	Yes	Go to the next step.
No	Replace the liftgate latch switch. (See LIFTGATE LATCH AND LOCK MOTOR REMOVAL/INSTALLATION.) After replacement, go to Step 8.
4	INSPECT LIFTGATE AUTO CLOSURE CONTROL MODULE CONNECTOR CONDITION • Disconnect the liftgate auto closure control module connector. • Inspect the connector and terminals (corrosion, damage, pin disconnection). • Is the connector normal?	Yes	Go to the next step.
No	Repair/replace the connector or terminal. After repair procedure, go to Step 8.
5	INSPECT BCM CONNECTOR CONDITION • Disconnect the BCM connector. • Inspect the connector and terminals (corrosion, damage, pin disconnection). • Is the connector normal?	Yes	Go to the next step.
No	Repair/replace the connector or terminal. After repair procedure, go to Step 8.
6	INSPECT LIFTGATE LATCH SWITCH CIRCUIT FOR SHORT CIRCUIT TO GROUND • Inspect for continuity between liftgate latch switch connector terminal A and body ground. • Is there continuity?	Yes	Repair/replace the wiring harness. After repair procedure, go to Step 8.
No	Go to the next step.
7	INSPECT LIFTGATE AUTO CLOSURE CONTROL MODULE • Inspect the liftgate auto closure control module. (See LIFTGATE AUTO CLOSURE CONTROL MODULE INSPECTION.) • Is the liftgate auto closure control module normal?	Yes	Go to the next step.
No	Replace the liftgate auto closure control module. (See LIFTGATE AUTO CLOSURE CONTROL MODULE REMOVAL/INSTALLATION.) After replacement, go to the next step.
8	VERIFY DTC • Reconnect the disconnected connectors and the negative battery cable. • Clear DTCs using the M-MDS. (See CLEARING DTC [BCM].) • Perform the BCM DTC inspection using the M-MDS with the liftgate closed (liftgate latch switch off). (See DTC INSPECTION [BCM].) • Is the same DTC present?	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.
No	Go to the next step.
9	VERIFY THAT NO OTHER DTCs ARE PRESENT • Are there other DTCs output?	Yes	Perform the corresponding DTC inspection.
No	DTC troubleshooting completed.

WGN

Malfunction Location

• Cargo compartment light switch circuit malfunction

Detection Condition

• Short to ground detected in cargo compartment light switch circuit with the liftgate closed (cargo compartment light switch off)

Possible Causes

• Short circuit to ground in wiring harness between cargo compartment light switch connector terminal C and BCM connector terminal 6C

• Short circuit to ground in wiring harness between cargo compartment light connector terminal C and BCM connector terminal 6C

• Cargo compartment light switch malfunction

• BCM malfunction

System Wiring Diagram

am6zzw00003673

Diagnostic Procedure

Step

Inspection

Action

1

PERFORM DTC INSPECTION

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

•  Perform the BCM DTC inspection using the M-MDS with the liftgate closed (cargo compartment light switch off).
(See DTC INSPECTION [BCM].)

•  Is DTC B1178:11 displayed?

Yes

Go to the next step.

No

DTC troubleshooting completed.

2

INSPECT CARGO COMPARTMENT LIGHT SWITCH CONNECTOR CONDITION

•  Switch the ignition to off.

•  Disconnect the negative battery cable.

•  Disconnect the cargo compartment light switch connector.

•  Inspect the connector and terminals (corrosion, damage, pin disconnection).

•  Is the connector normal?

Yes

Go to the next step.

No

Repair/replace the connector or terminal.

After repair procedure, go to Step 6.

3

INSPECT CARGO COMPARTMENT LIGHT SWITCH

•  Inspect the cargo compartment light switch.
(See LIFTGATE LATCH AND LOCK ACTUATOR INSPECTION.)

•  Is the cargo compartment light switch normal?

Yes

Go to the next step.

No

Replace the cargo compartment light switch.

(See LIFTGATE LATCH AND LOCK ACTUATOR REMOVAL/INSTALLATION.)

After replacement, go to Step 6.

4

INSPECT BCM CONNECTOR CONDITION

•  Disconnect the BCM connector.

•  Inspect the connector and terminals (corrosion, damage, pin disconnection).

•  Is the connector normal?

Yes

Go to the next step.

No

Repair/replace the connector or terminal.

After repair procedure, go to Step 6.

5

INSPECT CARGO COMPARTMENT LIGHT SWITCH CIRCUIT FOR SHORT CIRCUIT TO GROUND

•  Inspect for continuity between cargo compartment light switch connector terminal C and body ground.

•  Is there continuity?

Yes

Repair/replace the wiring harness.

After repair procedure, go to the next step.

No

Go to the next step.

6

VERIFY DTC

•  Reconnect the disconnected connectors and the negative battery cable.

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

•  Perform the BCM DTC inspection using the M-MDS with the liftgate closed (cargo compartment light switch off).
(See DTC INSPECTION [BCM].)

•  Is the same DTC present?

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.

No

Go to the next step.

7

VERIFY THAT NO OTHER DTCs ARE PRESENT

•  Are there other DTCs output?

Yes

Perform the corresponding DTC inspection.

No

DTC troubleshooting completed.