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

id0902p4014400

System malfunction location

Liftgate latch switch circuit malfunction

Detection condition

•  With the liftgate closed (liftgate latch switch off), rear body control module (RBCM) detects short to ground in liftgate latch switch circuit.

Fail-safe

—

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 and lock actuator terminal C

•  Rear body control module (RBCM) malfunction

System malfunction location	Liftgate latch switch circuit malfunction
Detection condition	• With the liftgate closed (liftgate latch switch off), rear body control module (RBCM) detects short to ground in liftgate latch switch circuit.
Fail-safe	—
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 and lock actuator terminal C • Rear body control module (RBCM) malfunction

Diagnostic Procedure

Step	Inspection		Action
1	VERIFY REAR BODY CONTROL MODULE (RBCM) DTCs AGAIN • Clear rear body control module (RBCM) DTCs using the M-MDS. (See CLEARING DTC [REAR BODY CONTROL MODULE (RBCM)].) • Perform the DTC inspection for the rear body control module (RBCM) using the M-MDS. (See DTC INSPECTION [REAR BODY CONTROL MODULE (RBCM)].) • Is DTC B1178:11 displayed?	Yes	Go to the next step.
1		No	Go to Step 7.
2	INSPECT LIFTGATE LATCH AND LOCK ACTUATOR CONNECTOR • Switch the ignition to off. • Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5 (WITHOUT i-stop)].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 2.2].) • 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 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) connector and liftgate latch and lock actuator connector are disconnected. • Inspect for continuity between liftgate latch and lock actuator terminal C (vehicle wiring harness) and body ground. • Is there continuity?	Yes	Repair or replace the wiring harness which has a short to ground, then go to the next step.
5		No	Go to the next step.
6	VERIFY THAT REPAIRS HAVE BEEN COMPLETED • Reconnect all the disconnected connectors. • Reconnect the disconnected negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5 (WITHOUT i-stop)].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 2.2].) • Clear rear body control module (RBCM) DTCs using the M-MDS. (See CLEARING DTC [REAR BODY CONTROL MODULE (RBCM)].) • Perform the DTC inspection for the rear body control module (RBCM) using the M-MDS. (See DTC INSPECTION [REAR BODY CONTROL MODULE (RBCM)].) • Is DTC B1178:11 displayed?	Yes	Repeat the inspection from Step 1. • If the malfunction recurs, replace the rear body control module (RBCM), then go to the next step. (See REAR BODY CONTROL MODULE (RBCM) REMOVAL/INSTALLATION.)
6		No	Go to the next step.
7	VERIFY IF OTHER DTCs DISPLAYED • Are any other DTCs displayed?	Yes	Repair the malfunctioning part according to the applicable DTC troubleshooting. (See DTC TABLE [REAR BODY CONTROL MODULE (RBCM)].)
7		No	DTC troubleshooting completed.