Brake Pedal Position Switch Signal Circuit Troubleshooting

Turn the ignition switch 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 POSITION SWITCH TEST ).
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 OFF.
Jump the SCS line with the HDS.
Disconnect the brake pedal position switch 4P connector.
Disconnect ECM/PCM connector E (31P).
Check for continuity between ECM/PCM connector terminal E22 and body ground.
Is there continuity?

YES - Repair short in the wire between the ECM/PCM (E22) and the No. 7 HORN, STOP (15 A) fuse. Replace the No. 7 HORN, STOP (15 A) fuse.

NO - Go to step 9.

Fig 1: Checking Continuity Between ECM/PCM Connector Terminal E22 & Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Check for continuity between ECM/PCM connector terminal E22 and brake pedal position switch 4P connector terminal No. 2.
Is there continuity?

YES - Repair open in the wire between the brake pedal position switch and the No. 7 HORN, STOP (15 A) fuse. Inspect the brake position switch (see BRAKE PEDAL POSITION SWITCH TEST ).

NO - Repair open in the wire between the ECM/PCM (E22) and the brake pedal position switch.

Fig 2: Checking Continuity Between ECM/PCM Connector Terminal E22 & Brake Pedal Position Switch 4P Connector Terminal No. 2
Courtesy of AMERICAN HONDA MOTOR CO., INC.