DTC B1174:13 [REAR BODY CONTROL MODULE (RBCM)]

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2014 - Mazda6 - Body and Accessories

DTC B1174:13 [REAR BODY CONTROL MODULE (RBCM)]

Without Theft-Deterrent System


Description	Front door lock-link switch (RH) unlock circuit malfunction
Detection condition	Rear body control module (RBCM) detects an open circuit in the door lock-link switch unlock circuit with the front door lock-link switch (RH) unlocked.
Fail-safe function	Not applicable
Possible cause	Front door latch and lock actuator (RH) connector or terminal malfunction Open circuit in wiring harness between front door latch and lock actuator (RH) terminal D and body ground. Front door lock-link switch (RH) malfunction Rear body control module (RBCM) connector or terminal malfunction Open circuit in wiring harness between rear body control module (RBCM) terminal 3J and front door latch and lock actuator (RH) terminal L 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 8.
2	INSPECT FRONT DOOR LATCH AND LOCK ACTUATOR (RH) CONNECTOR Switch the ignition off. Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.5].) Disconnect the front door latch and lock actuator (RH) 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 7.
3	INSPECT FOR OPEN CIRCUIT IN FRONT DOOR LOCK-LINK SWITCH (RH) GROUND CIRCUIT Verify that the front door latch and lock actuator (RH) connector is disconnected. Inspect for continuity between front door latch and lock actuator (RH) terminal D (wiring harness-side) and body ground. Is there continuity?	Yes	Go to the next step.
3		No	Refer to the wiring diagram and verify whether or not there is a common connector between front door latch and lock actuator (RH) terminal D and body ground. 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 an open circuit. Repair or replace the malfunctioning part. If there is no common connector: Repair or replace the wiring harness which has an open circuit. Go to Step 7.
4	INSPECT FRONT DOOR LOCK-LINK SWITCH (RH) Inspect the front door lock-link switch (RH). (See DOOR LOCK-LINK SWITCH INSPECTION.) Is the front door lock-link switch (RH) normal?	Yes	Go to the next step.
4		No	Replace the front door latch and lock actuator (RH), then go to Step 7. (See FRONT DOOR LATCH AND LOCK ACTUATOR REMOVAL/INSTALLATION.)
5	INSPECT REAR BODY CONTROL MODULE (RBCM) CONNECTOR 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.
5		No	Repair or replace the connector, then go to Step 7.
6	INSPECT FOR OPEN CIRCUIT IN FRONT DOOR LOCK-LINK SWITCH (RH)/REAR DOOR LINK SWITCH (LH)/(RH) CIRCUIT Verify that the rear body control module (RBCM), front door latch and lock actuator (RH), rear door latch and lock actuator (LH) and (RH) connectors are disconnected. Inspect for continuity between the following terminals (wiring harness-side): Rear body control module (RBCM) terminal 3J—Front door latch and lock actuator (RH) terminal L Rear body control module (RBCM) terminal 3J—Rear door latch and lock actuator (LH) terminal B Rear body control module (RBCM) terminal 3J—Rear door latch and lock actuator (RH) terminal L Is there continuity?	Yes	Go to the next step.
6		No	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 3J—Front door latch and lock actuator (RH) terminal L Rear body control module (RBCM) terminal 3J—Rear door latch and lock actuator (LH) terminal B Rear body control module (RBCM) terminal 3J—Rear door latch and lock actuator (RH) terminal L 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 an open circuit. Repair or replace the malfunctioning part. If there is no common connector: Repair or replace the wiring harness which has an open circuit. Go to the next step.
7	VERIFY THAT REPAIRS HAVE BEEN COMPLETED Always reconnect all disconnected connectors. Reconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [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.
7		No	Go to the next step.
8	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)].)
8		No	DTC troubleshooting completed.

With Theft-Deterrent System


Description	Front door lock-link switch (RH)/rear door lock-link switch (LH)/(RH) unlock circuit malfunction
Detection condition	Rear body control module (RBCM) detects an open circuit in the door lock-link switch unlock circuit with the front door lock-link switch (RH)/rear door lock-link switch (LH)/(RH) unlocked.
Fail-safe function	Not applicable
Possible cause	Front door latch and lock actuator (RH) connector or terminal malfunction Open circuit in wiring harness between front door latch and lock actuator (RH) terminal D and body ground. Front door lock-link switch (RH) malfunction Rear door latch and lock actuator (LH) connector or terminal malfunction Open circuit in wiring harness between rear door latch and lock actuator (LH) terminal J and body ground Rear door lock-link switch (LH) malfunction Rear door latch and lock actuator (RH) connector or terminal malfunction Open circuit in wiring harness between rear door latch and lock actuator (RH) terminal D and body ground Rear door lock-link switch (RH) malfunction Rear body control module (RBCM) connector or terminal malfunction Open circuit in wiring harness between the following terminals: Rear body control module (RBCM) terminal 3J—Front door latch and lock actuator (RH) terminal L Rear body control module (RBCM) terminal 3J—Rear door latch and lock actuator (LH) terminal B Rear body control module (RBCM) terminal 3J—Rear door latch and lock actuator (RH) terminal L 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 14.
2	INSPECT FRONT DOOR LATCH AND LOCK ACTUATOR (RH) CONNECTOR Switch the ignition off. Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.5].) Disconnect the front door latch and lock actuator (RH) 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 13.
3	INSPECT FOR OPEN CIRCUIT IN FRONT DOOR LOCK-LINK SWITCH (RH) GROUND CIRCUIT Verify that the front door latch and lock actuator (RH) connector is disconnected. Inspect for continuity between front door latch and lock actuator (RH) terminal D (wiring harness-side) and body ground. Is there continuity?	Yes	Go to the next step.
3		No	Refer to the wiring diagram and verify whether or not there is a common connector between front door latch and lock actuator (RH) terminal D and body ground. 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 an open circuit. Repair or replace the malfunctioning part. If there is no common connector: Repair or replace the wiring harness which has an open circuit. Go to Step 13.
4	INSPECT FRONT DOOR LOCK-LINK SWITCH (RH) Inspect the front door lock-link switch (RH). (See DOOR LOCK-LINK SWITCH INSPECTION.) Is the front door lock-link switch (RH) normal?	Yes	Go to the next step.
4		No	Replace the front door latch and lock actuator (RH), then go to Step 13. (See FRONT DOOR LATCH AND LOCK ACTUATOR REMOVAL/INSTALLATION.)
5	INSPECT REAR DOOR LATCH AND LOCK ACTUATOR (LH) CONNECTOR Disconnect the rear door latch and lock actuator (LH) 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.
5		No	Repair or replace the connector, then go to Step 13.
6	INSPECT FOR OPEN CIRCUIT IN REAR DOOR LOCK-LINK SWITCH (LH) GROUND CIRCUIT Verify that the rear door latch and lock actuator (LH) connector is disconnected. Inspect for continuity between rear door latch and lock actuator (LH) terminal J (wiring harness-side) and body ground. Is there continuity?	Yes	Go to the next step.
6		No	Refer to the wiring diagram and verify whether or not there is a common connector between rear door latch and lock actuator (LH) terminal J and body ground. 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 an open circuit. Repair or replace the malfunctioning part. If there is no common connector: Repair or replace the wiring harness which has an open circuit. Go to Step 13.
7	INSPECT REAR DOOR LOCK-LINK SWITCH (LH) Inspect the rear door lock-link switch (LH). (See DOOR LOCK-LINK SWITCH INSPECTION.) Is the rear door lock-link switch (LH) normal?	Yes	Go to the next step.
7		No	Replace the rear door latch and lock actuator (LH), then go to Step 13. (See FRONT DOOR LATCH AND LOCK ACTUATOR REMOVAL/INSTALLATION.)
8	INSPECT REAR DOOR LATCH AND LOCK ACTUATOR (RH) CONNECTOR Disconnect the rear door latch and lock actuator (RH) 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 13.
9	INSPECT FOR OPEN CIRCUIT IN REAR DOOR LOCK-LINK SWITCH (RH) GROUND CIRCUIT Verify that the rear door latch and lock actuator (RH) connector is disconnected. Inspect for continuity between rear door latch and lock actuator (RH) terminal D (wiring harness-side) and body ground. Is there continuity?	Yes	Go to the next step.
9		No	Refer to the wiring diagram and verify whether or not there is a common connector between rear door latch and lock actuator (RH) terminal D and body ground. 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 an open circuit. Repair or replace the malfunctioning part. If there is no common connector: Repair or replace the wiring harness which has an open circuit. Go to Step 13.
10	INSPECT REAR DOOR LOCK-LINK SWITCH (RH) Inspect the rear door lock-link switch (RH). (See DOOR LOCK-LINK SWITCH INSPECTION.) Is the rear door lock-link switch (RH) normal?	Yes	Go to the next step.
10		No	Replace the rear door latch and lock actuator (RH), then go to Step 13. (See REAR DOOR LATCH AND LOCK ACTUATOR REMOVAL/INSTALLATION.)
11	INSPECT REAR BODY CONTROL MODULE (RBCM) CONNECTOR 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.
11		No	Repair or replace the connector, then go to Step 13.
12	INSPECT FOR OPEN CIRCUIT IN FRONT DOOR LOCK-LINK SWITCH (RH)/REAR DOOR LINK SWITCH (LH)/(RH) CIRCUIT Verify that the rear body control module (RBCM), front door latch and lock actuator (RH), rear door latch and lock actuator (LH) and (RH) connectors are disconnected. Inspect for continuity between the following terminals (wiring harness-side): Rear body control module (RBCM) terminal 3J—Front door latch and lock actuator (RH) terminal L Rear body control module (RBCM) terminal 3J—Rear door latch and lock actuator (LH) terminal B Rear body control module (RBCM) terminal 3J—Rear door latch and lock actuator (RH) terminal L Is there continuity?	Yes	Go to the next step.
12		No	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 3J—Front door latch and lock actuator (RH) terminal L Rear body control module (RBCM) terminal 3J—Rear door latch and lock actuator (LH) terminal B Rear body control module (RBCM) terminal 3J—Rear door latch and lock actuator (RH) terminal L 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 an open circuit. Repair or replace the malfunctioning part. If there is no common connector: Repair or replace the wiring harness which has an open circuit. Go to the next step.
13	VERIFY THAT REPAIRS HAVE BEEN COMPLETED Always reconnect all disconnected connectors. Reconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [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.
13		No	Go to the next step.
14	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)].)
14		No	DTC troubleshooting completed.

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