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Home › Mitsubishi › 1997 › Montero LS › Repair and Diagnosis › Engine Performance › System › Engine Controls - Tests W/Codes › Circuit Tests › DTC P0201-P0206: Fuel Injector Circuit Failure › Test Procedures

Test Procedures

  1. If using scan tool, go to step 3). Using a stethoscope or long-bladed screwdriver, listen for clicking sound from each fuel injector while engine is running or being cranked. If no sound is heard from fuel injector(s), check fuel injector connections. Repair connections as necessary. If connections are okay, go to next step.
  2. Ensure engine coolant temperature is at 68°F (20°C). Disconnect fuel injector connector. Using DVOM, check resistance between specified fuel injector terminals. See FUEL INJECTOR TERMINAL IDENTIFICATION  table. If resistance is not 13-16 ohms, replace fuel injector(s). If resistance is as specified, go to step 6).
    FUEL INJECTOR TERMINAL IDENTIFICATION

    Application Terminals No.
    Montero (1) 8 & 1
    8 & 2
    8 & 3
    8 & 5
    8 & 6
    8 & 7
    (1) Check resistance at intermediate fuel injector connector (component side).
    INJECTOR CRANKING DRIVE TIME SPECIFICATIONS

    Coolant Temperature Drive Time (ms)
    32°F (0°C) 11.0-17.0
    68°F (20°C) 28.0-42.0
    176°F (80°C) 7.4-11.2
    INJECTOR OPERATING DRIVE TIME SPECIFICATIONS

    Engine Speed Drive Time (ms)
    750 RPM 2.1-3.3
    2000-2500 RPM 1.9-3.1
    Suddenly Accelerated (1)
    (1) Drive time should increase.
  3. Disconnect MFI relay connector and fuel injector connector at faulty fuel injector. Using DVOM, check for continuity between MFI relay connector terminal No. 3 and fuel injector connector terminal No. 8. If continuity does not exist, repair wiring harness as necessary. If continuity exists, go to step 9).
  4. Ground specified ECM connector terminal. See INJECTOR-TO-ECM CIRCUIT IDENTIFICATION  table. Using DVOM, check for continuity between chassis ground and specified fuel injector connector terminal. If continuity does not exist, repair appropriate circuit as necessary. If continuity exists, condition required to set DTC is not present at this time. Go to next step.
    INJECTOR-TO-ECM CIRCUIT IDENTIFICATION

    Injector No. Injector Connector Terminal No. PCM Terminal No.
    1 3 1
    2 2 14
    3 1 2
    4 7 15
    5 6 3
    6 5 16
  5. Test is complete. Intermittent problem may exist. Road test vehicle (if necessary) and attempt to duplicate conditions that caused original complaint. Recheck for DTCs. If no DTCs are displayed, go to INTERMITTENT DTCS  .
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