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Brake Pedal Position Switch Signal Circuit Troubleshooting

WARNING: This page is about a different car, the 2011 Acura TL, 2010 Acura TL, and 2009 Acura TL. However, it is still accessible from the selected car via links, so may be relevant.
  1. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode
  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), or press the engine start/stop button to select the OFF mode
  5. Jump the SCS line with the HDS
  6. Disconnect the brake pedal position switch 4P connector
  7. Disconnect PCM connector A (49P)
  8. Check for continuity between PCM connector terminal A8 and body ground
    Fig 1: Checking Continuity Between PCM Connector Terminal A8 And Body Ground
    G05987545Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Repair short in the wire between the PCM (A8) and the brake pedal position switch Also replace the No 10 HORN/STOP (20 A) fuse in the under-hood fuse/relay box

    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: Connecting Brake Pedal Position Switch 4P Connector Terminal 2 To Body Ground With Jumper Wire
    G05987546Courtesy of AMERICAN HONDA MOTOR CO., INC.
  10. Check for continuity between PCM connector terminal A8 and body ground
    Fig 3: Checking Continuity Between PCM Connector Terminal A8 And Body Ground
    G05987547Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Repair open in the wire between the brake pedal position switch, and also replace the No 10 HORN/STOP (20 A) fuse in the under-hood fuse/relay box Inspect the brake pedal position switch (see BRAKE PEDAL AND BRAKE PEDAL POSITION SWITCH ADJUSTMENT )

    NO  -Repair open in the wire between the PCM (A8) and the brake pedal position switch