INSPECTION PROCEDURE A-1: Central Door Locking System Does Not Work At All: Diagnosis

WARNING: This page is about a different car, the 2014 Mitsubishi Outlander. However, it is still accessible from the selected car via links, so may be relevant.

STEP 1. Using scan tool (M.U.T.-III), DTC check.
Check that ETACS-ECU stores a diagnostic trouble code.

Q: Is the diagnostic trouble code stored?
- YES: Refer to DIAGNOSTIC TROUBLE CODE CHART .
- NO: Go to Step 2.

STEP 2. Using scan tool (M.U.T.-III), DTC check list.

Check the ETACS-ECU service items related to the central door locking system operation.

Door lock switch: Unlock → Lock.

Item No.	Item name	Normal condition
270	Dr door lock switch	Not lock → Lock

Door lock switch: Lock → Unlock.

Item No.	Item name	Normal condition
270	Dr door lock switch	Lock → Not lock

OK: Normal conditions are displayed for all the items.

Q: Is the check result normal?

YES: Go to Step 3.
NO: Refer to TROUBLE SYMPTOM CHART FOR INPUT SIGNAL .

STEP 3. Check of short to power supply, short to ground, and open circuit in +B2 line between ETACS-ECU connector and fusible link.
Q: Is the check result normal?
- YES: Go to Step 4.
- NO: Repair the connector(s) or wiring harness.
STEP 4. Central door lock switch check.
Check that the central door lock switch is in good condition. Refer to CENTRAL DOOR LOCK SWITCH CHECK .

Q: Is the check result normal?
- YES: Go to Step 5.
- NO: Replace the power window main switch.
STEP 5. Check of open circuit in ground line between power window main switch connector and body ground.
Q: Is the check result normal?
- YES: Go to Step 6.
- NO: Repair the connector(s) or wiring harness.
STEP 6. Check of short to power supply, short to ground, and open circuit in D-LS, D-US line between ETACS-ECU connector and power window main switch connector.
Q: Is the check result normal?
- YES: Go to Step 7.
- NO: Repair the connector(s) or wiring harness.
STEP 7. Retest the system.
Check that the central door locking system works normally.

Q: Is the check result normal?
- YES: No action is necessary and testing is complete.
- NO: Replace ETACS-ECU.