Inspection Procedure 7: The rain sensitive AUTO wiper function does not work at all < Vehicles with lighting control sensor >: 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. Lighting control sensor installation surface check
Visually check the presence of scratches or air bubbles (diameter of 5 mm or more) on the windshield to which the lighting control sensor is installed.

Q: Is the check result normal?
- YES: Go to Step 2.
- NO: Replace the windshield (Refer to WINDSHIELD REMOVAL AND INSTALLATION ).
STEP 2. Windshield wiper operation check
Check that the windshield wipers work normally.

Q: Is the check result normal?
- YES: Go to Step 3.
- NO: Refer to TROUBLE SYMPTOM CHART .
STEP 3. Use the scan tool MB991958 to check if an ETACS-related diagnostic trouble code is stored.
Connect the scan tool. Refer to HOW TO CONNECT THE SCAN TOOL (M.U.T.-III) ."

Q: Is the diagnostic trouble code stored?
- YES: Diagnose the ETACS-ECU. Refer to "DIAGNOSTIC TROUBLE CODE CHART ."
- NO: Go to Step 4.
STEP 4. Using scan tool MB991958, read the lighting control sensor diagnostic trouble code.
Check if a lighting control sensor diagnostic trouble code is stored.

Connect the scan tool. Refer to HOW TO CONNECT THE SCAN TOOL (M.U.T.-III) ."

Q: Is the diagnostic trouble code stored?
- YES: Diagnose the lighting control sensor. [Diagnostic Trouble Code: (Refer to DIAGNOSTIC TROUBLE CODE CHART ) or Service Data (DATA LIST REFERENCE TABLE ).]
- NO: Go to Step 5.
STEP 5. Resistance measurement at lighting control sensor connector
1. Disconnect the connector, and measure the resistance at the wiring harness.
2. Measure the resistance between lighting control sensor connector (ground terminal) and body ground.
  OK: Continuity exists (2 Ω or less)
Q: Is the check result normal?
- YES: Go to Step 7.
- NO: Go to Step 6.
STEP 6. Check of open circuit in body ground line between lighting control sensor connector and the body ground.
Q: Is the check result normal?
- YES: Intermittent malfunction (Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTION .)
- NO: Repair the connector(s) or wiring harness.
STEP 7. Voltage measurement at lighting control sensor connector (BUP1 terminal).
1. Disconnect the connector, and measure the voltage at the wiring harness side.
2. Measure the voltage between the lighting control sensor connector (BUP1 terminal) and body ground.
  OK: System voltage
Q: Is the check result normal?
- YES: Go to Step 9.
- NO: Go to Step 8.
STEP 8. Check of open circuit in BUP1 line between ETACS-ECU and lighting control sensor connector.
Q: Is the check result normal?
- YES: Intermittent malfunction (Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTION .)
- NO: Repair the connector(s) or wiring harness.
STEP 9. Measure the voltage at ETACS-ECU connector (LIN2 terminal).
1. Disconnect the connector, and measure the voltage at the wiring harness side.
2. Measure the voltage between ETACS-ECU connector (LIN2 terminal) and body ground.
  OK: System voltage
Q: Is the check result normal?
- YES: Replace the Lighting control sensor.
- NO: Go to Step 10.
STEP 10. Check of short to power supply, short to ground and open circuit in LIN2 line between ETACS-ECU connector and lighting control sensor connector.
Q: Is the check result normal?
- YES: Intermittent malfunction (Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTION .)
- NO: Repair the connector(s) or wiring harness.