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 ECM/PCM connector A (44P).
Check for continuity between ECM/PCM connector terminal A40 and body ground.

Fig 1: Checking Continuity Between ECM/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 ECM/PCM (A40) and the brake pedal position switch. Also, replace the No. B24 STOP, HORN (10 A) fuse.

NO -Go to step 9.
Connect brake pedal position switch 4P connector terminal No. 1 to body ground with a jumper wire.

Fig 2: Connecting Brake Pedal Position Switch 4P Connector Terminal No. 1 To Body Ground With Jumper Wire
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Check for continuity between ECM/PCM connector terminal A40 and body ground.

Fig 3: Checking Continuity Between ECM/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. B24 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 ECM/PCM (A40) and the brake pedal position switch.