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Home >> Mazda >> 2017 >> CX-5 Grand Select, FWD >> Repair and Diagnosis >> Accessories & Equipment >> Communication Devices >> On-Board Diagnostic - Rear Body Control Module (RBCM) >> DTC B1174-13; Door Lock-Link Switch Unlock Circuit Malfunction >> Diagnostic Procedure

Diagnostic Procedure

DIAGNOSTIC PROCEDURE

Step Inspection Action
1 VERIFY REAR BODY CONTROL MODULE (RBCM) DTCs AGAIN Yes Go to the next step.
No Go to Step 14.
2 INSPECT FRONT DOOR LATCH AND LOCK ACTUATOR (RH) CONNECTOR CONDITION
  • Switch the ignition off.
  • Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION .)
  • 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.
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.
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) Yes Go to the next step.
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 CONDITION
  • 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.
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.
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) Yes Go to the next step.
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 CONDITION
  • 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.
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.
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) Yes Go to the next step.
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 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.
No Repair or replace the connector, then go to Step 13.
12 INSPECT FOR OPEN CIRCUIT IN DOOR LOCK-LINK SWITCH UNLOCK 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.
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 Yes Repeat the inspection from Step 1.
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)] .)
No DTC troubleshooting completed.