INSPECTION PROCEDURE N-7: Column switch: The ETACS-ECU does not receive any signal from windshield mist wiper switch, windshield intermittent wiper switch, windshield low-speed wiper switch, windshield high-speed wiper switch, rear wiper switch, windshield washer switch or rear washer switch.: Diagnosis

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
  • MB991911: M.U.T.-III Main Harness B
• MB991813: SWS monitor kit
  • MB991806: SWS monitor cartridge
  • MB991812: SWS monitor harness (for column-ECU)
  • MB991922: Probe harness

1. STEP 1. Use scan tool MB991502 to select "ECU COMM Check" on the SWS monitor display. 

   Check the column-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. Connect special tool MB991911 before connecting special tool MB991812. Be sure to connect special tool MB991806 after turning on special tool MB991824.
   1. Connect the special tool. Refer to "HOW TO CONNECT SWS MONITOR " .
   2. Turn the ignition switch to the "LOCK" (OFF) position.
   3. Operate scan tool MB991958 according to the procedure below to display "ECU COMM Check."
      1. Select "Interactive Diagnosis."
      2. Select "System select."
      3. Select "SWS."
      4. Select "SWS MONITOR."
      5. Select "ECU COMM Check."
   4. Scan tool MB991958 should show "OK" on the "ECU COMM Check" menu for the "COLUMN ECU" menu.

   Q: Is "OK" displayed on the "COLUMN ECU" menu? 

   YES:  Go to Step 2.

   NO:  Refer to INSPECTION PROCEDURE A-2 "COMMUNICATION WITH THE COLUMN SWITCH (COLUMN-ECU) IS NOT POSSIBLE  ."

   Fig 1: Connecting Scan Tool To Data Link Connector

   Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
2. STEP 2. Check the windshield wiper and washer switch. 

   Remove the windshield wiper and washer switch. Then check continuity between the switch terminals.

   WINDSHIELD WIPER AND WASHER SWITCH CHECK
   
   

   SWITCH POSITION	TESTER CONNECTION	SPECIFIED CONDITION
   OFF	4 - 6, 5 - 6, 6 - 7, 6 - 8, 6 - 9, 6 - 10, 6 - 11	Open circuit
   Windshield mist wiper switch	6 - 11	Less than 2 ohms
   Windshield intermittent wiper switch	6 - 10	Less than 2 ohms
   Windshield low-speed wiper switch	6 - 9	Less than 2 ohms
   Windshield high-speed wiper switch	6 - 8	Less than 2 ohms
   Windshield washer switch	6 - 7	Less than 2 ohms
   Rear wiper switch < GSR and MR edition >	4 - 6	Less than 2 ohms
   Rear washer switch < GSR and MR edition >	5 - 6	Less than 2 ohms

   Fig 2: Identifying Terminals Of Windshield Wiper And Washer Switch

   Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

   Q: Are the windshield wiper and washer switch in good condition? 

   YES:  Go to Step 3.

   NO:  Replace the column switch. If the equipment described in "CIRCUIT OPERATION " works normally, the input signal from the column switch (windshield wiper and washer switch) should be normal.

3. STEP 3. Check the switch body. 

   Remove the turn-signal light and lighting switch and windshield wiper and washer switch. Then check continuity between the switch body terminals.

   SWITCH BODY CHECK
   
   

   SWITCH BODY	TESTER CONNECTION	SPECIFIED CONDITION
   Lighting switch side - Windshield wiper and washer switch side	4 - 4, 5 -5, 6 -6, 7 -7, 8 -8, 9 -9, 10 -10, 11 -11	Less than 2 ohms

   Q: Is the switch body in good condition? 

   YES:  Go to Step 4.

   NO:  Replace the column switch. If the equipment described in "CIRCUIT OPERATION " works normally, the input signal from the column switch (windshield wiper and washer switch) should be normal.

   Fig 3: Identifying Lighting Switch And Windshield Wiper And Washer Switch Terminals

   Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
4. STEP 4. Replace the column switch. 
   1. Replace the column switch.
   2. If the equipment described in "CIRCUIT OPERATION " works normally, the input signal from the column switch (windshield wiper and washer switch) should be normal.

   Q: Does the column switch (windshield wiper and washer switch) send a normal signal to the ECU? 

   YES:  No action is necessary and testing is complete.

   NO:  Replace the ETACS-ECU. If the equipment described in "CIRCUIT OPERATION " works normally, the input signal from the column switch (windshield wiper and washer switch) should be normal.