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Home >> Mitsubishi >> 2003 >> Eclipse GS, Standard >> Repair and Diagnosis >> Accessories & Equipment >> Cruise Control Systems >> Auto-Cruise Control System >> Auto-Cruise Control System Diagnosis >> Diagnostic Trouble Code Procedures >> DTC 17: Throttle Position Sensor System >> Diagnosis

DTC 17: Throttle Position Sensor System: Diagnosis

Required Special Tools: 

  1. STEP 1. Check the throttle position sensor  .
    CAUTION: To prevent damage to scan tool MB991502, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991502.
    1. Using scan tool MB991502.
    2. Connect scan tool MB991502 to the data link connector.
    3. Turn the ignition switch to the "ON" position.
    4. Read the MFI-DTC.
    5. Turn the ignition switch to the "LOCK" (OFF) position.

    Q: Is the MFI-DTC P0120 is output? 

    1. YES:  For 2.4L engine, refer to DIAGNOSTIC TROUBLE CODE DEFINITIONS .

      For 3.0L engine, refer to DIAGNOSTIC TROUBLE CODE DEFINITIONS .

    2. NO:  Go to Step 2.
    Fig 1: Connecting Scan Tool To Data Link Connector (DTC 17)
    G01932123Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
  2. STEP 2. Check the output circuit voltage at auto-cruise control ECU connector C-20 (terminal number 1) by backprobing  .
    1. Do not disconnect auto-cruise control ECU connector C-20.
    2. Turn the ignition switch to the "ON" position and the auto-cruise control main switch to the "ON" position.
    3. Measure the voltage between terminal 1 and ground by backprobing.
      • Voltage should be between 4.0 and 5.5 volts.

        (When accelerator pedal is fully depressed.)

      • Voltage should be between 0.4 and 1.0 volts.

        (When accelerator pedal is released.)

    4. Turn the ignition switch to the "LOCK" (OFF) position.

    Q: Are the voltage within specifications? 

    1. YES:  Check that diagnostic trouble code 17 is not output. If diagnostic trouble code 17 is output, replace the auto-cruise control ECU. (Refer to AUTO-CRUISE CONTROL .)

      Then check that diagnostic trouble code 17 is not output.

    2. NO:  Go to Step 3.
    Fig 2: Checking Output Circuit Voltage At Auto-Cruise Control ECU Connector C-20 By Backprobing (DTC 17)
    G01932124Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
  3. STEP 3. Check auto-cruise control ECU connector C-20  .

    Q: Is the connector damaged? 

    1. YES:  Repair or replace connector.

      Then check that diagnostic trouble code 17 is not output.

    2. NO:  Go to Step 4.
    Fig 3: Identifying Auto-Cruise Control ECU Connector C-20 Location (DTC 17)
    G01932125Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
  4. STEP 4. Check the harness wire between throttle position sensor connector B-07 (terminal number 3) and auto-cruise control ECU connector C-20 (terminal number 1)  .

    Q: Is the harness wire between throttle position sensor connector B-07 (terminal number 3) and auto-cruise control ECU connector C-20 (terminal number 1) damaged? 

    1. YES:  Repair harness wire and then check that diagnostic trouble code 17 is not output.
    2. NO:  Check that diagnostic trouble code 17 is not output. If diagnostic trouble code 17 is output, replace the auto-cruise control ECU. (Refer to AUTO-CRUISE CONTROL .)

    Then check that diagnostic trouble code 17 is not output.

    Fig 4: Identifying Throttle Position Sensor Connector B-07 Wire Harness Location (DTC 17) - 2.4L Engine
    G01932126Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
    Fig 5: Identifying Throttle Position Sensor Connector B-07 Wire Harness Location (DTC 17) - 3.0L Engine
    G01932127Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
    Fig 6: Identifying Auto-Cruise Control ECU Connector C-20 Location (DTC 17)
    G01932128Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
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