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

id0902p4012900

L.H.D.

Description

Door lock switch 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 function

Not applicable

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 the following terminals:

―  Rear body control module (RBCM) terminal 3F—Power window main switch terminal 2M (Without retractable outer mirror)

―  Rear body control module (RBCM) terminal 3F—Power window main switch terminal 1E (With retractable outer mirror)

•  Rear body control module (RBCM) malfunction

Description	Door lock switch 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 function	Not applicable
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 the following terminals: ― Rear body control module (RBCM) terminal 3F—Power window main switch terminal 2M (Without retractable outer mirror) ― Rear body control module (RBCM) terminal 3F—Power window main switch terminal 1E (With retractable outer mirror) • 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 POWER WINDOW MAIN SWITCH CONNECTOR CONDITION • Switch the ignition off. • Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].) • 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 DOOR LOCK 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 FOR SHORT TO GROUND IN DOOR LOCK SWITCH CIRCUIT • Verify that the power window main switch and rear body control module (RBCM) connectors are disconnected. • Inspect for continuity between rear body control module (RBCM) terminal 3F (wiring harness-side) 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 3F—Power window main switch terminal 2M (Without retractable outer mirror) • Rear body control module (RBCM) terminal 3F—Power window main switch terminal 1E (With retractable outer mirror) 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. • Reconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].) • 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.

R.H.D.

Description

Door lock switch 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 function

Not applicable

Possible cause

•  Power window main switch connector or terminal malfunction

•  Door lock switch (RH) 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

Description	Door lock switch 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 function	Not applicable
Possible cause	• Power window main switch connector or terminal malfunction • Door lock switch (RH) 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 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 POWER WINDOW MAIN SWITCH CONNECTOR CONDITION • Switch the ignition off. • Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].) • 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 (RH) • Inspect the door lock switch (RH). (See DOOR LOCK SWITCH INSPECTION.) • Is the door lock switch (RH) 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 FOR SHORT TO GROUND IN DOOR LOCK SWITCH CIRCUIT • Verify that the power window main switch and rear body control module (RBCM) connectors are disconnected. • Inspect for continuity between rear body control module (RBCM) terminal 3F (wiring harness-side) 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 3F and power window main switch terminal 1E 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. • Reconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].) • 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.