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D3 Switch Circuit Troubleshooting

  1. Turn the ignition switch to LOCK (0).
  2. Disconnect the D3 switch/park pin switch/A/T gear position indicator panel light harness connector (see A/T GEAR POSITION INDICATOR PANEL LIGHT HARNESS REPLACEMENT  ).
  3. Check for continuity between D3 switch/park pin switch/A/T gear position indicator panel light harness connector terminals No. 1 and No. 3 when pressing the D3 button.
    Fig 1: Checking Continuity Between D3 Switch/Park Pin Switch/A/T Gear Position Indicator Panel Light Harness Connector Terminals 1
    G06681002Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity when pressing the D3 button once, and no continuity when pressing the button again? 

    YES  -Go to step 4.

    NO  -Replace the D3 switch (see D3 SWITCH REPLACEMENT  ).

  4. Turn the ignition switch to ON (II).
  5. Measure the voltage between D3 switch/park pin switch/A/T gear position indicator panel light harness connector terminals No. 1 and No. 3.
    Fig 2: Measuring Voltage Between D3 Switch/Park Pin Switch/A/T Gear Position Indicator Panel Light Harness Connector Terminals 1
    G06681003Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there battery voltage? 

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

    NO  -Go to step 6.

  6. Turn the ignition switch to LOCK (0).
  7. Check for continuity between D3 switch/park pin switch/A/T gear position indicator panel light harness connector terminal No. 3 and body ground.
    Fig 3: Checking Continuity Between A/T Gear Position Indicator Panel Light Harness Connector Terminal 3 And Body Ground
    G06681004Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Go to step 8.

    NO  -Repair open in the wire between D3 switch/park pin switch/A/T gear position indicator panel light harness connector terminal No. 3 and body ground (G501), or repair poor body ground (G501).

  8. Turn the ignition switch to LOCK (0).
  9. Jump the SCS line with the HDS.
  10. Disconnect PCM connector A (49P).
  11. Check for continuity between D3 switch/park pin switch/A/T gear position indicator panel light harness connector terminal No. 1 and body ground.
    Fig 4: Checking Continuity Between A/T Gear Position Indicator Panel Light Harness Connector Terminal 1 And Body Ground
    G06681005Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Repair short to body ground in the wire between PCM connector terminal A17 and the D3 switch/park pin switch/A/T gear position indicator panel light harness connector.

    NO  -Go to step 12.

  12. Check for continuity between D3 switch/park pin switch/A/T gear position indicator panel light harness connector terminal No. 1 and PCM connector terminal A17.
    Fig 5: Checking Continuity Between A/T Gear Position Indicator Panel Light Harness Connector Terminal 1 And PCM Connector Terminal A17
    G06681006Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

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

    NO  -Repair open in the wire between PCM connector terminal A17 and the D3 switch/park pin switch/A/T gear position indicator panel light harness connector.

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