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Home >> Honda >> 2012 >> Accord SE >> Repair and Diagnosis >> Engine Performance >> System >> Idle Control System (4-CYL) >> Symptom Troubleshooting >> PSP Switch Signal Circuit Troubleshooting >> Brake Pedal Position Switch Signal Circuit Troubleshooting
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Brake Pedal Position Switch Signal Circuit Troubleshooting

  1. Turn the ignition switch to ON (II).
  2. Check the BRAKE SWITCH in the DATA LIST with the HDS.

    Does it indicate OFF? 

    YES  -Go to step 3.

    NO  -Inspect the brake pedal position switch (see BRAKE PEDAL AND BRAKE PEDAL POSITION SWITCH ADJUSTMENT ).

  3. Press the brake pedal, and check the BRAKE SWITCH in the DATA LIST with the HDS.

    Does it change to ON? 

    YES  -The brake pedal position switch signal circuit (BKSW line) is OK.

    NO  -Go to step 4.

  4. Turn the ignition switch to LOCK (0).
  5. Jump the SCS line with the HDS.
  6. Disconnect the brake pedal position switch 4P connector.
  7. Disconnect ECM/PCM connector A (49P).
  8. Check for continuity between ECM/PCM connector terminal A42 and body ground.
    Fig 1: Checking Continuity Between ECM/PCM Connector Terminal And Body Ground
    G07341691Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Repair short in the wire between the ECM/PCM (A42) and the brake pedal position switch. Replace the No. 10 HORN/STOP (20 A) fuse.

    NO  -Go to step 9.

  9. Connect brake pedal position switch 4P connector terminal No. 2 to body ground with a jumper wire.
    Fig 2: Identifying Brake Pedal Position Switch Connector Terminal And Body Ground
    G07341692Courtesy of AMERICAN HONDA MOTOR CO., INC.
  10. Check for continuity between ECM/PCM connector terminal A42 and body ground.
    Fig 3: Checking Continuity Between ECM/PCM Connector Terminal And Body Ground
    G07341693Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Repair open in the wire between the brake pedal position switch and the No. 10 HORN/STOP (20 A) fuse. Inspect the brake pedal position switch (see BRAKE PEDAL AND BRAKE PEDAL POSITION SWITCH ADJUSTMENT ).

    NO  -Repair open in the wire between the ECM/PCM (A42) and the brake pedal position switch.