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TROUBLESHOOTING HINTS Mitsubishi Eclipse IV facelift

Traction Control/active Skid Control System: Diagnosis 6 illustrations ~1131 words

TROUBLESHOOTING HINTS

  1. Malfunction of the combination meter
  2. Damaged harness, connector
  3. Malfunction of the TCL/ASC-ECU

Required Special Tools

  1. 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
  1. STEP 1. Using scan tool MB991958, diagnose the CAN bus line. 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 scan tool MB991958 to the data link connector. Turn the ignition switch to the "ON" position. Diagnose the CAN bus line. Turn the ignition switch to the "LOCK" (OFF) position. Disconnect scan tool MB991958. Q: Is the check result satisfactory? YES : Go to Step 2 NO : Repair the CAN bus lines. Refer to «CONTROLLER AREA NETWORK (CAN)»(ref-313851) . Then go to Step 4 .
  2. STEP 2. Using scan tool MB991958, read the diagnostic trouble code. 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 scan tool MB991958 to the data link connector. Turn the ignition switch to the "ON" position. Use scan tool MB991958 to read the TCL/ASC diagnostic trouble codes. (Refer to «DIAGNOSTIC FUNCTION»(ref-308302-S14505027832009020200000) ). Turn the ignition switch to the "LOCK" (OFF) position. Disconnect scan tool MB991958. Q: Is any DTC set? YES : Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-308302-S23690000172009020200000) . Then go to Step 4 . NO : Go to Step 3.
  3. STEP 3. Using scan tool MB991958, read the diagnostic trouble code. 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 scan tool MB991958 to the data link connector. Turn the ignition switch to the "ON" position. Check for Combination meter system diagnostic trouble code. (Refer to «HOW TO READ AND ERASE DIAGNOSTIC TROUBLE CODES»(ref-308263-S11555736242009020200000) ). Turn the ignition switch to the "LOCK" (OFF) position. Disconnect scan tool MB991958. Q: Is DTC U1102 set? YES : Replace the hydraulic unit (integrated with TCL/ASC-ECU). (Refer to «HYDRAULIC UNIT»(ref-308276-S34835063872009020200000) ). Then go to Step 4. NO : Replace the combination meter assembly. (Refer to «COMBINATION METER ASSEMBLY»(ref-308263-S34931017242009020200000) ). Then go to Step 4.
  4. STEP 4. Retest the system Q: Turn the ignition switch to the "ON" position. Do the "ASC OFF" indicator and the TCL/ASC work indicator illuminate for three seconds, and then go out after the engine starts? YES : The procedure is complete. NO : Return to Step 1 .

Scheme 258

Scheme 258: INSPECTION PROCEDURE 9: WHEN THE ASC OFF SWITCH IS PUSH ON, ASC DOES NOT BE CANCELLED
Scheme 258: INSPECTION PROCEDURE 9: WHEN THE ASC OFF SWITCH IS PUSH ON, ASC DOES NOT BE CANCELLED
  1. Malfunction of the ASC OFF switch
  2. Damaged harness, connector
  3. Malfunction of the TCL/ASC-ECU

Required Special Tools

  1. MB991223: Harness Set
  2. MB991997: ASC Check Harness
  3. MB992006: Extra Fine Probe

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  1. STEP 1. Measure the terminal voltage at TCL/ASC-ECU connector A-38. Disconnect the TCL/ASC-ECU connector A-38. Connect special tool MB991997 between the TCL/ASC-ECU and the body-side harness connector A-38. Turn the ignition switch to the "ON" position. Measure the terminal voltage between special tool MB991997 connector terminal 38 (TCL/ASC-ECU connector A-38 terminal 38) and ground. When the ASC OFF switch is not pressed, the voltage should measure battery positive voltage (approximately 12 volts). When the ASC OFF switch is pressed, the voltage should measure 1 volt or less. Turn the ignition switch to the "LOCK" (OFF) position. Disconnect special tool MB991997 between the TCL/ASC-ECU and the body-side harness connector A-38. Connect the TCL/ASC-ECU connector A-38. Q: Is the terminal voltage battery positive voltage when the ASC OFF switch is not pressed, and is the terminal voltage 1 volt or less when the ASC OFF switch is pressed? YES : Go to Step 6 . NO : Go to Step 2.
  2. STEP 2. Check the ASC OFF switch. Remove the ASC OFF switch. (Refer to «ASC OFF SWITCH»(ref-308302-S31818870612009020200000) ). Connect an ohmmeter to the ASC OFF switch between terminals 1 and 2. Check for continuity between terminals 1 and 2 when the ASC OFF switch is operated. There is no continuity between terminals 1 and 2 when the ASC OFF switch is not pressed. There is continuity between terminals 1 and 2 when the ASC OFF switch is pressed. Q: Is there no continuity between terminals 1 and 2 when the ASC OFF switch is not pressed, and is there continuity when the ASC OFF switch is pressed? YES : Install the ASC OFF switch. (Refer to «ASC OFF SWITCH»(ref-308302-S31818870612009020200000) ). Then go to Step 3. NO : Replace the ASC OFF switch. (Refer to «ASC OFF SWITCH»(ref-308302-S31818870612009020200000) ). Then go to Step 7 .
  3. STEP 3. Check TCL/ASC-ECU connector A-38, intermediate connector C-24 and ASC OFF switch connectors C-133 for loose, corroded or damaged terminals, or terminals pushed back in the connector. Q: Are there connectors and terminals in good condition? YES : Go to Step 4. NO : Repair or replace the faulty connector. (Refer to «HARNESS INSPECTION»(ref-308257-S10589022692009020200000) and «CONNECTOR INSPECTION SERVICE POINTS»(ref-308257-S31314734772009020200000) ). Then go to Step 7 .
  4. STEP 4. Check the harness wire between TCL/ASC-ECU connector A-38 terminal 38 and ASC OFF switch connector C-133 terminal 1 for damage. Q: Are there harness wires in good condition? YES : Go to Step 5. NO : Repair the damaged harness wire. Then go to Step 7 .
  5. STEP 5. Check the harness wire between ASC OFF switch connector C-133 terminal 2 and ground for damage. Q: Is the harness wire in good condition? YES : Go to Step 6. NO : Repair the damaged harness wire. Then go to Step 7 .
  6. STEP 6. Retest the system Q: Is ASC cancelled when the ASC OFF switch is push on? YES : It can be assumed that this malfunction is intermittent. Refer to «HOW TO COPE WITH INTERMITTENT MALFUNCTIONS»(ref-308257-S10174114642009020200000) . NO : Replace the hydraulic unit (integrated with TCL/ASC-ECU). Refer to «HYDRAULIC UNIT»(ref-308276-S34835063872009020200000) . Then go to Step 7.
  7. STEP 7. Retest the system Q: Is ASC cancelled when the ASC OFF switch is push on? YES : The procedure is complete. NO : Return to Step 1 .
  1. Malfunction of the CAN bus line.
  2. Malfunction of the TCL/ASC-ECU.

Required Special Tools

  1. 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
  1. STEP 1. Hydraulic unit check Refer to «HYDRAULIC UNIT CHECK»(ref-308276-S18916536722009020200000) . Q: Is the hydraulic unit normal? YES : Go to Step 2. NO : Connect the brake pipes correctly, repair the external brake lines, or replace the hydraulic unit.
  2. STEP 2. Verify that the condition described by the customer exists. Q: Can any faults be found with the brake operation? YES : Check the brake system related components except the ASC system. NO : The procedure is complete.