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 ADJUSTMENT ). ■
Press the brake pedal while checking the BRAKE SWITCH in the DATA LIST with the HDS.
Does it change to ON?

YES - The brake pedal position switch signal circuit (BK SW 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 (49P).
Check for continuity between PCM connector terminal A8 and body ground.
Is there continuity?

YES - Repair short in the wire between the PCM (A8) and the No. 11 STOP/HORN (20 A) fuse. Also, replace the No. 11 STOP/HORN (20 A) fuse. ■

NO - Go to step 9.

Fig 1: Checking Continuity Between PCM Connector Terminal A8 & Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.
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 A8 and body ground.
Is there continuity?

YES - Repair open in the wire between the brake pedal position switch and the No. 11 STOP/HORN (20A) fuse. If the circuit is OK, replace 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. ■

Fig 3: Checking Continuity Between PCM Connector Terminal A8 & Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.