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Home >> Mitsubishi >> 2002 >> Montero Limited >> Repair and Diagnosis >> Accessories & Equipment >> Cruise Control Systems >> Diagnostic Tests >> DTC 14: Stoplight Switch System

DTC 14: Stoplight Switch System

  1. Check output circuit voltage at stoplight switch connector D-123 by backprobing. See Fig 1 . Is voltage approximately battery positive voltage?

    If Yes, then go to step 3.

    If No, then go to next step.

    Fig 1: Measuring Voltage Between terminal No. 3 & Ground
    G00228057Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
  2. Check stoplight switch connector D-123. See Fig 2 . Is connector damaged?

    If Yes, then repair or replace connector. Then check that diagnostic trouble code 14 is not output.

    If No, then go to step 13.

    Fig 2: Checking Stoplight Switch Connector D-123
    G00228058Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
  3. Check output circuit voltage at stoplight switch connector D-123 by backprobing. See Fig 3 . Is voltage approximately battery positive voltage?

    If Yes, then go to step 6.

    If No, then go to next step.

    Fig 3: Measuring Voltage Between terminal No. 4 & Ground
    G00228059Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
  4. Check stoplight switch connector D-123. See Fig 2 . Is connector damaged?

    If Yes, then repair or replace connector. Then check that diagnostic trouble code 14 is not output.

    If No, then go to next step.

  5. Check stoplight switch. See Fig 4 . Is circuit open?

    If Yes, then replace stoplight switch. Then check that diagnostic trouble code 14 is not output.

    If No, then check that diagnostic trouble code 14 is not output. If diagnostic trouble code 14 is output, then replace auto-cruise control-ECU. Then check that diagnostic trouble code 14 is not output.

    Fig 4: Checking Stoplight Switch
    G00228060Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
  6. Check output circuit voltage auto-cruise control vacuum pump connector B-50 by backprobing. See Fig 5 . Is voltage approximately battery positive voltage?

    If Yes, then go to step  8 .

    If No, then go to next step.

    Fig 5: Measuring Voltage Between terminal No. 1 & Ground
    G00228061Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
  7. Check auto cruise control vacuum pump connector B-50 and intermediate connector D-125 and E-110. See Figure , Fig 6 and Fig 7 . Is any connector damaged?

    If Yes, then repair or replace connector. Then check that diagnostic trouble code 14 is not output.

    If No, then check harness wire between stoplight switch connector D-123 and auto-cruise control vacuum pump connector B-50 for open circuit or damage. Repair if necessary. Then check that diagnostic trouble code 14 is not output.

    Fig 6: Checking Intermediate Connector D-125
    G00228062Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
    Fig 7: Checking Intermediate Connector E-110
    G00228063Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
  8. Check output circuit voltage at auto-cruise control-ECU connector D-12 by backprobing. See Figure . Are values satisfied?

    If Yes, then check that DTC 14 is not output. If diagnostic trouble code 14 is output, then replace auto-cruise control-ECU. Then check that DTC 14 is not.

    If No, then go to next step.

  9. Check auto-cruise control-ECU connector D-12. See Figure . Is connector damaged?

    If Yes, then repair or replace connector. Then check that diagnostic trouble code 14 is not output.

    If No, then go to next step.

  10. Check auto-cruise control vacuum pump connector B-50. See Figure . Is connector damaged?

    If Yes, then repair or replace connector. Then check that diagnostic trouble code 14 is not output.

    If No, then go to next step.

  11. Check auto-cruise vacuum pump. See Figure . Are values satisfied?

    If Yes, then go to next step.

    If No, then replace auto-cruise vacuum pump. Then check that diagnostic trouble code 14 is not output.

  12. Check harness wire between auto-cruise control vacuum pump connector B-50 and auto-cruise control-ECU connector D-12. See Figure and Figure . Is any harness wire between auto-cruise control vacuum pump connector B-50 and auto-cruise control-ECU connector D-12 damaged?

    If Yes, then repair harness wire and then check that diagnostic trouble code 14 is not output.

    If No, then check that diagnostic trouble code 14 is not output. If diagnostic trouble code 14 is output, then replace auto-cruise control-ECU. Then check that diagnostic trouble code 14 is not output.

  13. Check output circuit voltage at auto-cruise control-ECU connector D-12 by backprobing. See Fig 8 . Is voltage approximately battery positive voltage?

    If Yes, then go to next step.

    If No, then go to step 15.

    Fig 8: Measuring Voltage Between terminal No. 5 & Ground
    G00228064Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
  14. Check intermediate connector D-125 and E-110. See Fig 6 and Fig 7 . Is any connector damaged?

    If Yes, then repair or replace connector. Then check that diagnostic trouble code 14 is not output.

    If No, then check harness wire between auto-cruise control-ECU connector D-12 and stoplight switch connector D-123 for open circuit or damage. Repair if necessary, then check that diagnostic trouble code 14 is not output.

  15. Check auto-cruise control-ECU connector D-12. See Figure . Is connector damaged?

    If Yes, then repair or replace connector. Then check that diagnostic trouble code 14 is not output.

    If No, then check that diagnostic trouble code 14 is not output. If diagnostic trouble code 14 is output, then replace auto-cruise control-ECU. Then check that diagnostic trouble code 14 is not output.

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