DTC B1178:11 [REAR BODY CONTROL MODULE (RBCM)]

id0902p4014400

Without Power Liftgate (PLG) System

Description	Liftgate latch switch circuit malfunction
Detection condition	• Rear body control module (RBCM) detects short to ground in liftgate latch switch circuit with the liftgate closed (liftgate latch switch off).
Fail-safe	Not applicable
Possible cause	• Liftgate latch and lock actuator connector or terminal malfunction • Liftgate latch switch malfunction • Rear body control module (RBCM) connector or terminal malfunction • Short to ground in wiring harness between rear body control module (RBCM) terminal 4K and liftgate latch switch terminal C • Rear body control module (RBCM) malfunction

Diagnostic Procedure

Step	Inspection		Action
1	VERIFY REAR BODY CONTROL MODULE (RBCM) DTCs AGAIN • Clear the DTC for the rear body control module (RBCM) using the M-MDS. (See CLEARING DTC [REAR BODY CONTROL MODULE (RBCM)].) • Retrieve the rear body control module (RBCM) DTCs using the M-MDS. (See DTC INSPECTION [REAR BODY CONTROL MODULE (RBCM)].) • Is the same DTC displayed?	Yes	Go to the next step.
1		No	Go to Step 7.
2	INSPECT LIFTGATE LATCH AND LOCK ACTUATOR CONNECTOR CONDITION • Switch the ignition off. • Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION.) • Disconnect the liftgate latch and lock actuator connector. • Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection. • Is the connector normal?	Yes	Go to the next step.
2		No	Repair or replace the connector, then go to Step 6.
3	INSPECT LIFTGATE LATCH SWITCH • Inspect the liftgate latch switch. (See LIFTGATE/POWER LIFTGATE (PLG) 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 Step 6. (See LIFTGATE LATCH AND LOCK ACTUATOR REMOVAL/INSTALLATION.)
4	INSPECT REAR BODY CONTROL MODULE (RBCM) CONNECTOR CONDITION • Disconnect the rear body control module (RBCM) connector. • Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection. • Is the connector normal?	Yes	Go to the next step.
4		No	Repair or replace the connector, then go to Step 6.
5	INSPECT LIFTGATE LATCH SWITCH CIRCUIT FOR SHORT TO GROUND • Verify that the rear body control module (RBCM) and liftgate latch and lock actuator connectors are disconnected. • Inspect for continuity between liftgate latch switch terminal C (wiring harness) and body ground. • Is there continuity?	Yes	Refer to the wiring diagram and verify whether or not there is a common connector between rear body control module (RBCM) terminal 4K and liftgate latch switch terminal C. If there is a common connector: • Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to ground. • Repair or replace the malfunctioning part. If there is no common connector: • Repair or replace the wiring harness which has a short to ground. Go to the next step.
5		No	Go to the next step.
6	VERIFY THAT REPAIRS HAVE BEEN COMPLETED • Always reconnect all disconnected connectors. • Connect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION.) • Clear the DTC for the rear body control module (RBCM) using the M-MDS. (See CLEARING DTC [REAR BODY CONTROL MODULE (RBCM)].) • Retrieve the rear body control module (RBCM) DTCs using the M-MDS. (See DTC INSPECTION [REAR BODY CONTROL MODULE (RBCM)].) • Is the same DTC displayed?	Yes	Repeat the inspection from Step 1. • If the malfunction recurs, replace the rear body control module (RBCM). (See REAR BODY CONTROL MODULE (RBCM) REMOVAL/INSTALLATION.) Go to the next step.
6		No	Go to the next step.
7	VERIFY IF OTHER DTCs DISPLAYED • Are any other DTCs displayed?	Yes	Repair or replace the malfunctioning part according to the applicable DTC troubleshooting. (See DTC TABLE [REAR BODY CONTROL MODULE (RBCM)].)
7		No	DTC troubleshooting completed.

With Power Liftgate (PLG) System

Description	Liftgate latch switch circuit malfunction
Detection condition	• Rear body control module (RBCM) detects short to ground in liftgate latch switch circuit with the liftgate closed (liftgate latch switch off).
Fail-safe	Not applicable
Possible cause	• Liftgate latch switch connector or terminal malfunction • Liftgate latch switch malfunction • Power liftgate (PLG) rear switch connector or terminal malfunction • Power liftgate (PLG) rear switch module malfunction • Power liftgate (PLG) control module connector or terminal malfunction • Power liftgate (PLG) control module malfunction • Rear body control module (RBCM) connector or terminal malfunction • Short to ground in wiring harness between the following terminals: ? Rear body control module (RBCM) terminal 4K and liftgate latch switch terminal A ? Rear body control module (RBCM) terminal 4K and power liftgate (PLG) rear switch terminal B ? Rear body control module (RBCM) terminal 4K and power liftgate (PLG) control module terminal 1S • Rear body control module (RBCM) malfunction

Diagnostic Procedure

Step	Inspection		Action
1	VERIFY REAR BODY CONTROL MODULE (RBCM) DTCs AGAIN • Clear the DTC for the rear body control module (RBCM) using the M-MDS. (See CLEARING DTC [REAR BODY CONTROL MODULE (RBCM)].) • Retrieve the rear body control module (RBCM) DTCs using the M-MDS. (See DTC INSPECTION [REAR BODY CONTROL MODULE (RBCM)].) • Is the same DTC displayed?	Yes	Go to the next step.
1		No	Go to Step 11.
2	INSPECT LIFTGATE LATCH SWITCH CONNECTOR CONDITION • Switch the ignition off. • Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION.) • Disconnect the liftgate latch switch connector. • Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection. • Is the connector normal?	Yes	Go to the next step.
2		No	Repair or replace the connector, then go to Step 10.
3	INSPECT LIFTGATE LATCH SWITCH • Inspect the liftgate latch switch. (See LIFTGATE/POWER LIFTGATE (PLG) LATCH SWITCH INSPECTION.) • Is the liftgate latch switch normal?	Yes	Go to the next step.
3		No	Replace the liftgate latch switch, then go to Step 10. (See LIFTGATE LATCH AND LOCK ACTUATOR REMOVAL/INSTALLATION.)
4	INSPECT POWER LIFTGATE (PLG) REAR SWITCH CONNECTOR CONDITION • Disconnect the power liftgate (PLG) rear switch connector. • Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection. • Is the connector normal?	Yes	Go to the next step.
4		No	Repair or replace the connector, then go to Step 10.
5	INSPECT POWER LIFTGATE (PLG) REAR SWITCH • Inspect the power liftgate (PLG) rear switch. (See POWER LIFTGATE (PLG) REAR SWITCH INSPECTION.) • Is the power liftgate (PLG) rear switch normal?	Yes	Go to the next step.
5		No	Replace the power liftgate (PLG) rear switch, then go to Step 10. (See POWER LIFTGATE (PLG) REAR SWITCH REMOVAL/INSTALLATION.)
6	INSPECT POWER LIFTGATE (PLG) CONTROL MODULE CONNECTOR CONDITION • Disconnect the power liftgate (PLG) control module connector. • Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection. • Is the connector normal?	Yes	Go to the next step.
6		No	Repair or replace the connector, then go to Step 10.
7	INSPECT POWER LIFTGATE (PLG) CONTROL MODULE • Inspect the power liftgate (PLG) control module. (See POWER LIFTGATE (PLG) CONTROL MODULE INSPECTION.) • Is the power liftgate (PLG) control module normal?	Yes	Go to the next step.
7		No	Replace the power liftgate (PLG) control module, then go to Step 10. (See POWER LIFTGATE (PLG) CONTROL MODULE REMOVAL/INSTALLATION.)
8	INSPECT REAR BODY CONTROL MODULE (RBCM) CONNECTOR CONDITION • Disconnect the rear body control module (RBCM) connector. • Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection. • Is the connector normal?	Yes	Go to the next step.
8		No	Repair or replace the connector, then go to Step 10.
9	INSPECT LIFTGATE LATCH SWITCH CIRCUIT FOR SHORT TO GROUND • Verify that the rear body control module (RBCM) and liftgate latch switch, power liftgate (PLG) rear switch and power liftgate (PLG) control module connectors are disconnected. • Inspect for continuity between liftgate latch switch terminal A (wiring harness) and body ground. • Is there continuity?	Yes	Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals. • Rear body control module (RBCM) terminal 4K and liftgate latch switch terminal A • Rear body control module (RBCM) terminal 4K and power liftgate (PLG) rear switch terminal B • Rear body control module (RBCM) terminal 4K and power liftgate (PLG) control module terminal 1S If there is a common connector: • Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to ground. • Repair or replace the malfunctioning part. If there is no common connector: • Repair or replace the wiring harness which has a short to ground. Go to the next step.
9		No	Go to the next step.
10	VERIFY THAT REPAIRS HAVE BEEN COMPLETED • Always reconnect all disconnected connectors. • Connect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION.) • Clear the DTC for the rear body control module (RBCM) using the M-MDS. (See CLEARING DTC [REAR BODY CONTROL MODULE (RBCM)].) • Retrieve the rear body control module (RBCM) DTCs using the M-MDS. (See DTC INSPECTION [REAR BODY CONTROL MODULE (RBCM)].) • Is the same DTC displayed?	Yes	Repeat the inspection from Step 1. • If the malfunction recurs, replace the rear body control module (RBCM). (See REAR BODY CONTROL MODULE (RBCM) REMOVAL/INSTALLATION.) Go to the next step.
10		No	Go to the next step.
11	VERIFY IF OTHER DTCs DISPLAYED • Are any other DTCs displayed?	Yes	Repair or replace the malfunctioning part according to the applicable DTC troubleshooting. (See DTC TABLE [REAR BODY CONTROL MODULE (RBCM)].)
11		No	DTC troubleshooting completed.