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Home >> Mitsubishi >> 2017 >> Lancer SE >> Repair and Diagnosis >> External Pages >> Different car >> Section 47 (Headlight System - With Diagnostics - Lancer) >> Symptom Procedures >> Inspection Procedure 9: One of the position light, the taillight, the rear side marker lights or the license plate light does not illuminate >> Lancer SPORTBACK >> Diagnosis

Lancer SPORTBACK: Diagnosis

WARNING: This page is about a different car, the 2015 Mitsubishi Lancer. However, it is still accessible from the selected car via links, so may be relevant.

Required Special Tools: 

  1. STEP 1. Bulb check. 

    Check the bulb(s) of the light that does not illuminate.

    Q: Is the check result normal? 

    1. YES < LANCER >:  Go to Step 2.
    2. YES < LANCER SPORTBACK >:  Go to  Step 8.
    3. NO:  Replace the bulb(s) of the light that does not illuminate.
  2. STEP 2. Check headlight assembly connector A-31 (position light: LH) or A-47 (position light: RH), rear combination light connector F-20 (taillight/rear side marker light: LH) or F-06 (taillight/rear side marker light: RH), taillight connector F-18 (LH) or F-07 (RH), license plate light connector F-13 (LH) or F-11 (RH) for loose, corroded or damaged terminals, or terminals pushed back in the connector. 

    Q: Is headlight assembly connector A-31 (position light: LH) or A-47 (position light: RH), rear combination light connector F-20 (taillight/rear side marker light: LH) or F-06 (taillight/rear side marker light: RH), taillight connector F-18 (LH) or F-07 (RH), license plate light connector F-13 (LH) or F-11 (RH) in good condition? 

    1. YES:  Go to Step 3.
    2. NO:  Repair or replace the damaged component(s). Refer to HARNESS CONNECTOR INSPECTION .
  3. STEP 3. Resistance measurement at headlight assembly connector A-31 (position light: LH) or A-47 (position light: RH), rear combination light connector F-20 (taillight/rear side marker light: LH) or F-06 (taillight/rear side marker light: RH), taillight connector F-18 (LH) or F-07 (RH), license plate light connector F-13 (LH) or F-11 (RH). 
    1. Disconnect the connector, and measure at the wiring harness side.
    2. Measure the resistance between the connector of light which does not illuminate and the body ground.
      • Measure the resistance between headlight assembly connector A-31 (position light: LH) or A-47 (position light: RH) (terminal 6) and body ground.
        Fig 1: Measuring Resistance Between Headlight Assembly Connector A-31 (Position Light LH) Or A-47 (Position Light RH) (Terminal 6) And Body Ground
        G09630023Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
      • Measure the resistance between rear combination light connector F-20 (taillight/rear side marker light: LH) or F-06 (taillight/rear side marker light: RH) (terminal 1) and body ground.
        Fig 2: Measuring Resistance Between Rear Combination Light Connector F-20 (Taillight/Rear Side Marker Light: LH) Or F-06 (Taillight/Rear Side Marker Light: RH) (Terminal 1) And Body Ground
        G09630024Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
      • Measure the resistance between taillight connector F-18 (LH) or F-07 (RH) (terminal 1) and body ground.
        Fig 3: Measuring Resistance Between Taillight Connector F-18 (LH) Or F-07 (RH) (Terminal 1) And Body Ground
        G09630025Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
      • Measure the resistance between license plate light connector F-13 (LH) or F-11 (RH) (terminal 1) and body ground.

        OK: The measured value should be continuity exists (2 ohms or less). 

    Q: Does the measured resistance value correspond with this range? 

    1. YES:  Go to  Step 5.
    2. NO:  Go to Step 4.
      Fig 4: Measuring Resistance Between License Plate Light Connector F-13 (LH) Or F-11 (RH) (Terminal 1) And Body Ground
      G09630026Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
  4. STEP 4. Check the wiring harness between headlight assembly connector, rear combination light connector, taillight connector or license plate light connector and the body ground. 

    Check the ground line for open circuit.

    • Check the wiring harness between headlight assembly (position light: LH) connector A-31 (terminal 6) and the body ground.
    • Check the wiring harness between headlight assembly (position light: RH) connector A-47 (terminal 6) and the body ground.
    • Check the wiring harness between rear combination light (taillight/rear side marker light: LH) connector F-20 (terminal 1) and the body ground.
    • Check the wiring harness between rear combination light (taillight/rear side marker light: RH) connector F-06 (terminal 1) and the body ground.
    • Check the wiring harness between taillight (LH) connector F-18 (terminal 1) and the body ground.
      NOTE: Also check intermediate connector F-23 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector F-23 is damaged, repair or replace the connector as described in HARNESS CONNECTOR INSPECTION .
    • Check the wiring harness between taillight (RH) connector F-07 (terminal 1) and the body ground.
      NOTE: Also check intermediate connector F-23 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector F-23 is damaged, repair or replace the connector as described in HARNESS CONNECTOR INSPECTION .
    • Check the wiring harness between license plate light (LH) connector F-13 (terminal 1) and the body ground.
      NOTE: Also check intermediate connector F-15 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector F-15 is damaged, repair or replace the connector as described in HARNESS CONNECTOR INSPECTION .
    • Check the wiring harness between license plate light (RH) connector F-11 (terminal 1) and the body ground.
      NOTE: Also check intermediate connector F-15 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector F-15 is damaged, repair or replace the connector as described in HARNESS CONNECTOR INSPECTION .

    Q: Is the wiring harness between headlight assembly connector, rear combination light connector, taillight connector or license plate light connector and the body ground in good condition? 

    1. YES:  Go to  Step 7.
    2. NO:  Repair the wiring harness.
  5. STEP 5. Check ETACS-ECU connector C-304 or C-311 for loose, corroded or damaged terminals, or terminals pushed back in the connector. 

    Q: Is ETACS-ECU connector C-304 or C-311 in good condition? 

    1. YES:  Go to Step 6.
    2. NO:  Repair the damaged parts.
  6. STEP 6. Check wiring harness between headlight assembly connector, rear combination light connector, taillight connector or license plate light connector and ETACS-ECU connector. 

    Check the power supply line for open circuit or short circuit.

    • Check the wiring harness between headlight assembly (position light: LH) connector A-31 (terminal 4) and ETACS-ECU connector C-304 (terminal 3).
    • Check the wiring harness between headlight assembly (position light: RH) connector A-47 (terminal 4) and ETACS-ECU connector C-304 (terminal 7).
    • Check the wiring harness between rear combination light (taillight/rear side marker light: LH) connector F-20 (terminal 3) and ETACS-ECU connector C-311 (terminal 10).
      NOTE: Also check intermediate connectors D-14 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector D-14 is damaged, repair or replace the connector as described in HARNESS CONNECTOR INSPECTION .
    • Check the wiring harness between rear combination light (taillight/rear side marker light: RH) connector F-06 (terminal 3) and ETACS-ECU connector C-311 (terminal 13).
      NOTE: Also check intermediate connector D-11 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector D-11 is damaged, repair or replace the connector as described in HARNESS CONNECTOR INSPECTION .
    • Check the wiring harness between taillight (LH) connector F-18 (terminal 2) and ETACS-ECU connector C-311 (terminal 10).
      NOTE: Also check intermediate connectors D-14 and F-23 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector D-14 or F-23 is damaged, repair or replace the connector as described in HARNESS CONNECTOR INSPECTION .
    • Check the wiring harness between taillight (RH) connector F-07 (terminal 2) and ETACS-ECU connector C-311 (terminal 13).
      NOTE: Also check intermediate connectors D-14 and F-23 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector D-14 or F-23 is damaged, repair or replace the connector as described in HARNESS CONNECTOR INSPECTION .
    • Check the wiring harness between license plate light (LH) connector F-13 (terminal 2) and ETACS-ECU connector C-311 (terminal 10).
      NOTE: Also check intermediate connectors D-14 and F-15 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector D-14 or F-15 is damaged, repair or replace the connector as described in HARNESS CONNECTOR INSPECTION .
    • Check the wiring harness between license plate light (RH) connector F-11 (terminal 2) and ETACS-ECU connector C-311 (terminal 10).
      NOTE: Also check intermediate connectors D-14 and F-15 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector D-14 or F-15 is damaged, repair or replace the connector as described in HARNESS CONNECTOR INSPECTION .

    Q: Is the wiring harness between headlight assembly connector, rear combination light connector, taillight connector or license plate light connector and ETACS-ECU connector in good condition? 

    1. YES:  Go to Step 7.
    2. NO:  Repair the wiring harness.
  7. STEP 7. Retest the system. 

    Check that the position light, taillight, rear side marker light, or license plate light illuminate normally.

    Q: Do the position light, taillight, rear side marker light, or license plate light work normally? 

    1. YES (The light illuminate normally.):  The trouble can be an intermittent malfunction (Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTION ).
    2. NO < When the position light does not illuminate >:  Replace the position light socket.
    3. NO < When the rear combination light (taillight/rear side marker light) do not illuminate >:  Replace the rear combination light socket.
    4. NO < When the taillight do not illuminate >:  Replace the taillight socket.
    5. NO < When the license plate light does not illuminate >:  Replace the license plate light socket.
  8. STEP 8. Check headlight assembly connector A-31 (position light: LH) or A-47 (position light: RH), rear combination light connector F-20 (taillight: LH) or F-06 (taillight: RH), rear side marker light connector F-40 (LH) or F-35 (RH), license plate light connector F-13 (LH) or F-11 (RH) for loose, corroded or damaged terminals, or terminals pushed back in the connector. 

    Q: Is headlight assembly connector A-31 (position light: LH) or A-47 (position light: RH), rear combination light connector F-20 (taillight: LH) or F-06 (taillight: RH), rear side marker light connector F-40 (LH) or F-35 (RH), license plate light connector F-13 (LH) or F-11 (RH) in good condition? 

    1. YES:  Go to Step 9.
    2. NO:  Repair or replace the damaged component(s). Refer to HARNESS CONNECTOR INSPECTION .
  9. STEP 9. Resistance measurement at headlight assembly connector A-31 (position light: LH) or A-47 (position light: RH), rear combination light connector F-20 (taillight: LH) or F-06 (taillight: RH), rear side marker light connector F-40 (LH) or F-35 (RH), license plate light connector F-13 (LH) or F-11 (RH). 
    1. Disconnect the connector, and measure at the wiring harness side.
    2. Measure the resistance between the connector of light which does not illuminate and the body ground.
      • Measure the resistance between headlight assembly connector A-31 (position light: LH) or A-47 (position light: RH) (terminal 6) and body ground.
        Fig 5: Measuring Resistance Between Headlight Assembly Connector A-31 (Position Light: LH) Or A-47 (Position Light: RH) (Terminal 6) And Body Ground
        G09630027Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
      • Measure the resistance between rear combination light connector F-20 (taillight: LH) or F-06 (taillight: RH) (terminal 3) and body ground.
        Fig 6: Measuring Resistance Between Rear Combination Light Connector F-20 (Taillight: LH) Or F-06 (Taillight: RH) (Terminal 3) And Body Ground
        G09630028Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
      • Measure the resistance between rear side marker light connector F-40 (LH) or F-35 (RH) (terminal 1) and body ground.
        Fig 7: Measuring Resistance Between Rear Side Marker Light Connector F-40 (LH) Or F-35 (RH) (Terminal 1) And Body Ground
        G09630029Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
      • Measure the resistance between license plate light connector F-13 (LH) or F-11 (RH) (terminal 1) and body ground.

        OK: The measured value should be continuity exists (2 Ω or less). 

    Q: Does the measured resistance value correspond with this range? 

    1. YES:  Go to  Step 11.
    2. NO:  Go to Step 10.
      Fig 8: Measuring Resistance Between License Plate Light Connector F-13 (LH) Or F-11 (RH) (Terminal 1) And Body Ground
      G09630030Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
  10. STEP 10. Check the wiring harness between headlight assembly connector, rear combination light connector, rear side marker light connector or license plate light connector and the body ground. 

    Check the ground line for open circuit.

    • Check the wiring harness between headlight assembly (position light: LH) connector A-31 (terminal 6) and the body ground.
    • Check the wiring harness between headlight assembly (position light: RH) connector A-47 (terminal 6) and the body ground.
    • Check the wiring harness between rear combination light connector F-20 (taillight: LH) (terminal 3) and the body ground.
    • Check the wiring harness between rear combination light connector F-06 (taillight: RH) (terminal 3) and the body ground.
    • Check the wiring harness between rear side marker light connector F-40 (LH) (terminal 1) and the body ground.
    • Check the wiring harness between rear side marker light connector F-35 (RH) (terminal 1) and the body ground.
    • Check the wiring harness between license plate light (LH) connector F-13 (terminal 1) and the body ground.
      NOTE: Also check intermediate connector F-30 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector F-30 is damaged, repair or replace the connector as described in HARNESS CONNECTOR INSPECTION .
    • Check the wiring harness between license plate light (RH) connector F-11 (terminal 1) and the body ground.
      NOTE: Also check intermediate connector F-30 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector F-30 is damaged, repair or replace the connector as described in HARNESS CONNECTOR INSPECTION .

    Q: Is the wiring harness between headlight assembly connector, rear combination light connector, rear side marker light connector or license plate light connector and the body ground in good condition? 

    1. YES:  Go to  Step 13.
    2. NO:  Repair the wiring harness.
  11. STEP 11. Check ETACS-ECU connector C-304 or C-311 for loose, corroded or damaged terminals, or terminals pushed back in the connector. 

    Q: Is ETACS-ECU connector C-304 or C-311 in good condition? 

    1. YES:  Go to Step 12.
    2. NO:  Repair the damaged parts.
  12. STEP 12. Check wiring harness between headlight assembly connector, rear combination light connector, rear side marker light connector or license plate light connector and ETACS-ECU connector. 

    Check the power supply line for open circuit or short circuit.

    • Check the wiring harness between headlight assembly (position light: LH) connector A-31 (terminal 4) and ETACS-ECU connector C-304 (terminal 3).
    • Check the wiring harness between headlight assembly (position light: RH) connector A-47 (terminal 4) and ETACS-ECU connector C-304 (terminal 7).
    • Check the wiring harness between rear combination light (taillight: LH) connector F-20 (terminal 2) and ETACS-ECU connector C-311 (terminal 10).
      NOTE: Also check intermediate connectors D-14 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector D-14 is damaged, repair or replace the connector as described in HARNESS CONNECTOR INSPECTION .
    • Check the wiring harness between rear combination light (taillight: RH) connector F-06 (terminal 2) and ETACS-ECU connector C-311 (terminal 13).
      NOTE: Also check intermediate connector D-11 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector D-11 is damaged, repair or replace the connector as described in HARNESS CONNECTOR INSPECTION .
    • Check the wiring harness between rear side marker light (LH) connector F-40 (terminal 2) and ETACS-ECU connector C-311 (terminal 10).
      NOTE: Also check intermediate connector D-14 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector D-14 is damaged, repair or replace the connector as described in HARNESS CONNECTOR INSPECTION .
    • Check the wiring harness between rear side marker light (RH) connector F-35 (terminal 2) and ETACS-ECU connector C-311 (terminal 13).
      NOTE: Also check intermediate connector D-11 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector D-11 is damaged, repair or replace the connector as described in HARNESS CONNECTOR INSPECTION .
    • Check the wiring harness between license plate light (LH) connector F-13 (terminal 2) and ETACS-ECU connector C-311 (terminal 10).
      NOTE: Also check intermediate connectors D-14 and F-30 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector D-14 or F-30 is damaged, repair or replace the connector as described in HARNESS CONNECTOR INSPECTION .
    • Check the wiring harness between license plate light (RH) connector F-11 (terminal 2) and ETACS-ECU connector C-311 (terminal 10).
      NOTE: Also check intermediate connectors D-14 and F-30 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector D-14 or F-30 is damaged, repair or replace the connector as described in HARNESS CONNECTOR INSPECTION .

    Q: Is the wiring harness between headlight assembly connector, rear combination light connector, rear side marker light connector or license plate light connector and ETACS-ECU connector in good condition? 

    1. YES:  Go to Step 13.
    2. NO:  Repair the wiring harness.
  13. STEP 13. Retest the system. 

    Check that the position light, taillight, rear side marker light, or license plate light illuminate normally.

    Q: Do the position light, taillight, rear side marker light, or license plate light work normally? 

    1. YES (The light illuminate normally.):  The trouble can be an intermittent malfunction (Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTION ).
    2. NO < When the position light does not illuminate >:  Replace the position light socket.
    3. NO < When the rear combination light (taillight) do not illuminate >:  Replace the rear combination light socket.
    4. NO < When the rear side marker light do not illuminate >:  Replace the rear side marker light socket.
    5. NO < When the license plate light does not illuminate >:  Replace the license plate light socket.
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