Diagnostic Procedure

WARNING: This page is about a different car, the 2016 Mazda CX-5. However, it is still accessible from the selected car via links, so may be relevant.

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

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] .) 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] .) 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.