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Low Oil Pressure Indicator Circuit Troubleshooting (Open)

NOTE:
  • Information marked with an asterisk (*1) applies to '09-10 models and '11-12 models (M/T).
  • Information marked with an asterisk (*2) applies to '11-12 models (A/T).
  1. Connect the Honda Diagnostic System (HDS) to the data link connector (DLC) (see step 2 on GENERAL TROUBLESHOOTING INFORMATION ).
  2. Turn the ignition switch to ON (II).
  3. Make sure the HDS communicates with the vehicle and the engine control module (ECM)/powertrain control module (PCM). If it does not, troubleshoot the DLC circuit (see DLC CIRCUIT TROUBLESHOOTING ).
  4. Check for DTCs (see GENERAL TROUBLESHOOTING INFORMATION ). If a DTC is present, diagnose, and repair the cause before continuing with this test.
  5. Turn the ignition switch to ON (II), and check the OIL PRESSURE SWITCH in the DATA LIST with the HDS.

    Is ON indicated? 

    YES  - Replace the gauge control module (see GAUGE CONTROL MODULE REPLACEMENT ).

    NO  - Go to step  6.

  6. Turn the ignition switch to LOCK (0).
  7. Check the oil pressure switch (see OIL PRESSURE SWITCH TEST  ).

    Is the oil pressure switch OK? 

    YES  - Go to step  8.

    NO  - Replace the oil pressure switch (see OIL PRESSURE SWITCH REPLACEMENT  ).

  8. Turn the ignition switch to ON (II), and jump the SCS line with the HDS, then turn the ignition switch to LOCK (0).
    NOTE: This step must be done to protect the ECM/PCM from damage.
  9. Disconnect ECM/PCM connector B (49P) and the oil pressure switch connector.
  10. Check for continuity between ECM/PCM connector terminal B7 and oil pressure switch 1P connector terminal No. 1.
    Fig 1: Checking Continuity Between ECM/PCM Connector Terminal B7 & Oil Pressure Switch Connector
    G05952658Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  - Update the ECM/PCM if it does not have the latest software (see ECM/PCM UPDATE ), or substitute a known-good ECM/PCM (see SUBSTITUTING THE ECM/PCM ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see ECM/PCM REPLACEMENT ).

    NO  - Repair an open in the wire between ECM/PCM connector terminal B7 and oil pressure switch 1P connector terminal No. 1.

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