DTC B2350: Malfunction of lighting switch,; DTC B2351: Malfunction of wiper/washer switch: Diagnosis

WARNING: This page is about a different variant/trim than selected.

Required Special Tools:

MB991958: Scan Tool (M.U.T.-III Sub Assembly)
- MB991824: Vehicle Communication Interface (V.C.I.)
- MB991827: M.U.T.-III USB Cable
- MB991910: M.U.T.-III Main Harness A (Vehicles with CAN communication system)

STEP 1. Using scan tool MB991958, Check whether the diagnostic trouble code is reset.
Check again if the DTC is set to the ETACS-ECU.

CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.
1. Connect scan tool MB991958. Refer to "HOW TO CONNECT SCAN TOOL ".
2. Turn the ignition switch to the "ON" position.
3. Erase the DTC.
4. Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
5. Check if the DTC B2350 or B2351 is set.
6. Turn the ignition switch to the "LOCK" (OFF) position.
  Q: Is the DTC set?
  
  DTC B2351 is set.: Go to Step 2.
  
  DTC B2350 is set.: Go to Step 3.
  
  No DTC is set.: The trouble can be an intermittent malfunction ( HOW TO COPE WITH INTERMITTENT MALFUNCTION ).
  
  Fig 1: Connecting Scan Tool To Data Link Connector
  Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
STEP 2. Using scan tool MB991958, Check whether the diagnostic trouble code is reset.
Check again if the DTC is set to the ETACS-ECU.
1. Replace the wiper/washer switch.
2. Turn the ignition switch to the "ON" position.
3. Erase the DTC.
4. Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
5. Check if DTC is set.
6. Turn the ignition switch to the "LOCK" (OFF) position.
  Q: Is the DTC set?
  - YES: Go to Step 3.
  - NO: The procedure is complete.
STEP 3. Using scan tool MB991958, Check whether the diagnostic trouble code is reset.
Check again if the DTC is set to the ETACS-ECU.
1. Replace the lighting switch (integrated with the column-ECU).
2. Turn the ignition switch to the "ON" position.
3. Erase the DTC.
4. Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
5. Check if DTC is set.
6. Turn the ignition switch to the "LOCK" (OFF) position.
  Q: Is the DTC set?
  - YES: Replace the ETACS-ECU.
  - NO: The procedure is complete.