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 2008 Mitsubishi Lancer. However, it is still accessible from the selected car via links, so may be relevant.

Required Special Tools:

MB991223: Harness Set
MB992006: Extra Fine Probe
MB991958: Scan Tool (M.U.T.-III Sub Assembly)
- MB991824: V.C.I.
- MB991827: M.U.T.-III USB Cable
- MB991910: M.U.T.-III Main Harness A

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

Fig 1: Connecting Scan Tool To Data Link Connector
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

Q: Is the diagnostic trouble code set?

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

Q: Is the diagnostic trouble code set?

YES : Diagnose the lighting control sensor. [Diagnostic Trouble Code: (Refer to DIAGNOSIS CODE CHART ) or Service Data (DATA LIST REFERENCE TABLE ).]

NO : Go to Step 5.
STEP 5. Connector check: D-02 Lighting control sensor connector
Q: Is the check result normal?

YES : Go to Step 6.

NO : Repair the damaged connector.
STEP 6. Resistance measurement at the D-02 lighting control sensor connector
1. Disconnect the connector, and measure the resistance at the wiring harness.
2. Measure the resistance between D-02 lighting control sensor connector terminal No.2 and body ground.
  
  Fig 2: Measuring Resistance Between D-02 Lighting Control Sensor Connector Terminal No.2 And Body Ground
  Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
  
  OK: Continuity exists (2 Ω or less)
Q: Is the check result normal?

YES : Go to Step 8.

NO : Go to Step 7.
STEP 7. Check the wiring harness between D-02 lighting control sensor connector terminal No.2 and body ground.
- Check the ground wires for open circuit.
Q: Is the check result normal?

YES : Intermittent malfunction (Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTION .)

NO : Repair the wiring harness.
STEP 8. Voltage measurement at the D-02 lighting control sensor connector
1. Disconnect the connector, and measure the voltage at the wiring harness side.
2. Measure the voltage between D-02 lighting control sensor connector terminal No.1 and body ground.
  
  Fig 3: Measuring Voltage Between D-02 Lighting Control Sensor Connector Terminal No.1 And Body Ground
  Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
  
  OK: Battery voltage
Q: Is the check result normal?

YES : Go to Step 10.

NO : Go to Step 9.
STEP 9. Check the wiring harness between D-02 lighting control sensor connector terminal No.1 and fusible link (36).
NOTE: Prior to the wiring harness inspection, check intermediate connector C-133, ETACS-ECU connectors C-307 and C-317, and repair if necessary.
- Check the power supply line for open circuit.
Q: Is the check result normal?

YES : Intermittent malfunction (Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTION .)

NO : Repair the wiring harness.
STEP 10. Connector check: C-316 ETACS-ECU connector
Q: Is the check result normal?

YES : Go to Step 11.

NO : Repair the damaged connector.
STEP 11. Measure the voltage at the C-316 ETACS-ECU connector.
1. Disconnect the connector, and measure the voltage at the wiring harness side.
2. Measure the voltage between C-316 ETACS-ECU connector terminal No. 1 and body ground.
  
  Fig 4: Measuring Voltage Between C-316 ETACS-ECU Connector Terminal No. 1 And Body Ground
  Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
  
  OK: Battery voltage
Q: Is the check result normal?

YES : Replace the Lighting control sensor.

NO : Go to Step 12.
STEP 12. Check the wiring harness between C-316 ETACS-ECU connector terminal No.1 and D-02 lighting control sensor connector terminal No.3.
- Check the input and output lines for open or short circuit.
Q: Is the check result normal?

YES : Intermittent malfunction (Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTION .)

NO : Repair the wiring harness.