Brake Pedal Position Switch Signal Circuit Troubleshooting

Turn the ignition switch to ON (II).
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/IDLE STOP SWITCH ADJUSTMENT ).
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.
Turn the ignition switch to LOCK (0).
Jump the SCS line with the HDS.
Disconnect the brake pedal position switch 4P connector.
Disconnect PCM connector A (44P).
Check for continuity between PCM connector terminal A40 and body ground.

Fig 1: Checking Continuity Between PCM Connector Terminal A40 And Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES -Repair a short in the wire between the PCM (A40) and the brake pedal position switch. Also, replace the No. 24 STOP/HORN (10 A) fuse.

NO -Go to step 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 No. 2 To Body Ground With Jumper Wire
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Check for continuity between PCM connector terminal A40 and body ground.

Fig 3: Checking Continuity Between PCM Connector Terminal A40 And Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES -Repair an open or short in the wire between the brake pedal position switch and the No. 24 STOP/HORN (10 A) fuse. Also, inspect the brake pedal position switch (see BRAKE PEDAL AND BRAKE PEDAL POSITION SWITCH/IDLE STOP SWITCH ADJUSTMENT ).

NO -Repair an open in the wire between the PCM (A40) and the brake pedal position switch.