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Home >> Mitsubishi >> 2014 >> Lancer SE >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 32 (Twin Clutch SPORTRONIC Shift Transmission (TC-SST) - With Diagnostics - Lancer (5 Of 6)) >> Diagnosis < Shift Lever > >> Symptom Procedures >> INSPECTION PROCEDURE 3: Back-up light does not illuminate < LANCER > >> Diagnostic Procedure

Diagnostic Procedure

WARNING: This page is about a different variant/trim than selected.
  1. STEP 1. Scan tool CAN bus diagnostics 

    Using scan tool MB991958, diagnose the CAN bus lines.

    Q: Is the check result normal? 

    1. YES:  Go to Step 2.
    2. NO:  Repair the CAN bus lines. (Refer to TROUBLESHOOTING .) After repairing the CAN bus line, go to Step 2.
  2. STEP 2. Scan tool actuator test 

    Item No. 2: Back-up light (Refer to SPECIAL FUNCTION (ACTUATOR TEST REFERENCE TABLE)  .)

    Q: Is the check result normal? 

    1. YES:  Intermittent malfunction. (Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTION .)
    2. NO:  Go to Step 3.
  3. STEP 3. Scan tool diagnostic trouble code 

    Check the ETACS diagnostic trouble code. (Refer to TROUBLESHOOTING .)

    Q: Is the DTC set? 

    1. YES:  Perform the relevant troubleshooting.
    2. NO:  Go to Step 4.
  4. STEP 4. Bulb check 

    Check if the bulb of the back-up light which does not illuminate is normal.

    Q: Is the check result normal? 

    1. YES:  Go to Step 5.
    2. NO:  Replace the bulb.
  5. STEP 5. Measure the resistance at F-08 back-up light (RH) connector and F-17 back-up light (LH) connector. 

    Disconnect the connector, and measure the resistance between the connector terminal No. 2 and ground at the wiring harness side.

    OK: Continuity exists. (2 Ω or less) 

    Q: Is the check result normal? 

    1. YES:  Go to  Step 8.
    2. NO:  Go to Step 6.
  6. STEP 6. Inspection of the back-up light (RH) connector, back-up light (LH) connector, and intermediate connector: F-08, F-17, F-23 

    Check for the contact with the connector terminals.

    Q: Is the check result normal? 

    1. YES:  Go to Step 7.
    2. NO:  Repair the defective connector.
  7. STEP 7. Check the wiring harness between F-08 back-up light (RH) connector terminal No. 2 and body ground, and between F-17 back-up light (LH) connector terminal No. 2 and body ground. 

    Check the ground line for open circuit.

    Q: Is the check result normal? 

    1. YES:  Intermittent malfunction. (Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTION .)
    2. NO:  Repair the wiring harness.
  8. STEP 8. Measure the voltage at F-08 back-up light (RH) connector and F-17 back-up light (LH) connector. 
    1. Disconnect the connector, and measure the voltage between the connector terminal No. 3 and ground at the wiring harness side.
    2. Turn the ignition switch to the "ON" position.
    3. Place the shift lever to the R range.

      OK: Battery positive voltage 

    Q: Is the check result normal? 

    1. YES:  Intermittent malfunction. (Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTION .)
    2. NO:  Go to Step 9.
  9. STEP 9. Inspection of intermediate connector, shift lever assembly connector, ETACS-ECU connector, and back-up light connector: C-39, C-49, C-304, C-311, C-313, D-14, F-08, F-17, F-23 

    Check for the contact with the connector terminals.

    Q: Is the check result normal? 

    1. YES:  Go to Step 10.
    2. NO:  Repair the defective connector.
  10. STEP 10. Check the wiring harness between F-08 back-up light (RH) connector terminal No. 3 and C-311 ETACS-ECU connector terminal No. 2, and between F-17 back-up light (RH) connector terminal No. 3 and C-311 ETACS-ECU connector terminal No. 2. 

    Check the power supply line for open or short circuit.

    Q: Is the check result normal? 

    1. YES:  Go to Step 11.
    2. NO:  Repair the wiring harness.
  11. STEP 11. Check the wiring harness between C-49 shift lever assembly connector terminal No. 3 and C-304 ETACS-ECU connector terminal No. 2. 

    Check the power supply line for open or short circuit.

    Q: Is the check result normal? 

    1. YES:  Go to Step 12.
    2. NO:  Repair the wiring harness.
  12. STEP 12. Check the wiring harness between C-49 shift lever assembly connector terminal No. 4 and C-313 ETACS-ECU connector terminal No. 4. 

    Check the power supply line for open or short circuit.

    Q: Is the check result normal? 

    1. YES:  Replace the ETACS-ECU. (Refer to ETACS-ECU . Then go to Step 13.
    2. NO:  Repair the wiring harness.
  13. STEP 13. Retest the system. 

    Q: Does a malfunction take place again? 

    1. YES:  Replace the shift lever assembly. (Refer to >> A << TRANSAXLE CONTROL CABLE (TRANSAXLE SIDE/SHIFT LEVER SIDE) INSTALLATION .)
    2. NO:  This diagnosis is complete.
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