Honda Accord: Brake Pedal Position Switch Signal Circuit Troubleshooting - Idle Control System - Fuel and Emissions - Honda Accord MK8 2008-2012 Service ManualHonda Accord: 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

-lnspect the brake pedal position switch (see page 19-6).

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 1.

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.

ECM/PCM CONNECTOR A (49P)

Terminal side of female terminals


Terminal side of female terminals

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.B NO

-Go to step 9.

9. Connect brake pedal position switch 4P connector terminal No. 2 to body ground with a jumper wire.

BRAKE PEDAL POSITION SWITCH 4P CONNECTOR

Wire side of female terminals


Wire side of female terminals

10. Check for continuity between ECM/PCM connector terminal A42 and body ground.

ECM/PCM CONNECTOR A (49P)

Terminal side of female terminals


Terminal side of female terminals

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 page19-6).

NO

-Repair open in the wire between the ECM/PCM (A42) and the brake pedal position switch.

    PSP Switch Signal Circuit Troubleshooting
    1. Start the engine, and let it idle. 2. Align the steering wheel straight ahead. 3. Check the PSP SWITCH in the DATA LIST with the HDS. Does it indicate ON? YES-Go to step 4. NO-Go to s ...

    Idle Speed Inspection
    NOTE: - Before checking the idle speed, check these items:  - The malfunction indicator lamp (MIL) has not been reported on, and there are no DTCs.  - Ignition timing  - Spark plug ...

    See also:

    Door Locks
    To lock both doors, push the front of the master door lock switch on either door, pull the lock tab rearward on the driver’s door, or use the key on the outside lock on the driver’s do ...

    General Troubleshooting Information
    Mow to Check for DTCs with the HDS NOTE: Check the vehicle battery condition first {see page 22-90). 1. Make sure the ignition switch is turned to LOCK (0). 2. Connect the HDS to the data link ...

    Rear Power Window Motor Test
    1. Remove the rear power window switch (see page 22-307). 2. Test the motor in each direction by connecting battery power and ground to the rear power window switch 14P connector (A) according t ...