DTC B108F:16 [REAR BODY CONTROL MODULE (RBCM)]

id0902p4012900

System malfunction location

Door lock switch (LH) circuit malfunction

Detection condition

•  With the door lock switch off, the rear body control module (RBCM) detects door lock switch circuit voltage of 4 V or less.

Fail-safe

—

Possible cause

•  Power window main switch connector or terminal malfunction

•  Door lock switch (LH) malfunction

•  Rear body control module (RBCM) connector or terminal malfunction

•  Short to ground in wiring harness between rear body control module (RBCM) terminal 3F and power window main switch terminal 1E

•  Rear body control module (RBCM) malfunction

System malfunction location	Door lock switch (LH) circuit malfunction
Detection condition	• With the door lock switch off, the rear body control module (RBCM) detects door lock switch circuit voltage of 4 V or less.
Fail-safe	—
Possible cause	• Power window main switch connector or terminal malfunction • Door lock switch (LH) malfunction • Rear body control module (RBCM) connector or terminal malfunction • Short to ground in wiring harness between rear body control module (RBCM) terminal 3F and power window main switch terminal 1E • 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 B108F:16 displayed?	Yes	Go to the next step.
1		No	Go to Step 7.
2	POWER WINDOW MAIN SWITCH CONNECTOR INSPECTION • 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 power window main 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 6.
3	INSPECT DOOR LOCK SWITCH (LH) • Inspect the door lock switch (LH). (See POWER WINDOW MAIN SWITCH INSPECTION.) • Is the door lock switch (LH) normal?	Yes	Go to the next step.
3		No	Replace the power window main switch, then go to Step 6. (See POWER WINDOW MAIN SWITCH 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 DOOR LOCK SWITCH CIRCUIT FOR SHORT TO GROUND • Verify the rear body control module (RBCM) connector and power window main switch connector are disconnected. • Inspect for continuity between rear body control module (RBCM) terminal 3F (vehicle wiring harness side) 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 B108F:16 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.