Brake Pedal Position Switch Signal Circuit Troubleshooting

WARNING: This page is about a different car, the 2012 Honda Fit, 2011 Honda Fit, 2010 Honda Fit, and 2009 Honda Fit. However, it is still accessible from the selected car via links, so may be relevant.

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, 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 (49P).
Check for continuity between ECM/PCM connector terminal A42 and body ground.

Fig 1: Checking Continuity Between ECM/PCM Connector Terminal A42 & Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES: Repair short in the wire between the ECM/PCM (A42) 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 ECM/PCM connector terminal A42 and body ground.

Fig 3: Checking Continuity Between ECM/PCM Connector Terminal A42 & Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES: Repair 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 ADJUSTMENT ).

NO: Repair open in the wire between the ECM/PCM (A42) and the brake pedal position switch.