Description

Front door latch switch (LH) circuit malfunction

Detection condition

• Rear body control module (RBCM) detects a short to ground in the front door latch switch (LH) circuit with the front door (LH) closed (front door latch switch (LH) off).

Fail-safe function

Not applicable

Possible cause

• Front door latch and lock actuator (LH) connector or terminal malfunction

• Front door latch 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 3W and front door latch and lock actuator (LH) terminal L

• Rear body control module (RBCM) malfunction

Step

Inspection

Action

1

• 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.

No

Go to Step 7.

2

• 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 (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 6.

3

• Inspect the front door latch switch (LH).

  (See FRONT DOOR LATCH SWITCH INSPECTION.)

• Is the front door latch switch (LH) normal?

Yes

Go to the next step.

No

Replace the front door latch and lock actuator (LH), then go to Step 6.

(See FRONT DOOR LATCH AND LOCK ACTUATOR REMOVAL/INSTALLATION.)

4

• 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 6.

5

• Verify that the rear body control module (RBCM) and front door latch and lock actuator (LH) connectors are disconnected.

• Inspect for continuity between front door latch and lock actuator (LH) terminal L (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 3W and front door latch and lock actuator (LH) 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 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.

No

Go to the next step.

6

• 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.

No

Go to the next step.

7

• 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.