DTC 68-21: Brake Pedal Position Switch Stuck OFF

WARNING: This page is about a different car, the 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.

NOTE: Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information. (See General Troubleshooting Information ).

NOTE: Troubleshoot any fuel and emissions DTCs first.

Turn the ignition switch to ON (II).
Check the BRAKE PRESS in the VSA DATA LIST with the HDS. Do not press the brake pedal.
Is there 10 MPa or less?

YES - Go to step 3.

NO - Check for brake drag (see SYMPTOM TROUBLESHOOTING ) or a misadjusted brake pedal position switch (see BRAKE PEDAL AND BRAKE PEDAL POSITION SWITCH ADJUSTMENT ). If they are normal, go to step 32 .
Check the BRAKE SWITCH in the VSA DATA LIST with the HDS while moving the brake pedal.
Does it indicate ON when the pedal is pressed, and OFF when the pedal is released?

YES - Intermittent failure, the system is OK at this time. Refer to intermittent failures troubleshooting (see Intermittent Failures ).

NO - Go to step 4.
Turn the ignition switch to LOCK (0).
Disconnect the brake pedal position switch 4P connector (see BRAKE PEDAL AND BRAKE PEDAL POSITION SWITCH ADJUSTMENT ).
Connect brake pedal position switch 4P connector terminals No. 1 and No. 2 with a jumper wire.

Fig 1: Connecting Brake Pedal Position Switch 4P Connector Terminals No. 1 & No. 2 With Jumper Wire
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Turn the ignition switch to ON (II).
Check the BRAKE SWITCH in the VSA DATA LIST with the HDS.
Does it indicate ON?

YES - Check the brake pedal position switch adjustment (see BRAKE PEDAL AND BRAKE PEDAL POSITION SWITCH ADJUSTMENT ). If it is OK, replace the brake pedal position switch.

NO - Go to step 9.
Turn the ignition switch to LOCK (0).
Disconnect the jumper wire.
Check the No. 24 (10 A) fuse in the under-dash fuse/relay box.
Is the fuse blown?

YES - Go to step 12.

NO - Reinstall the checked fuse, then go to step 22 .
Check for continuity between brake pedal position switch 4P connector terminal No. 1 and body ground.

Fig 2: Checking Continuity Between Brake Pedal Position Switch 4P Connector Terminal No. 1 & Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES - Repair short to body ground in the wire between the No. 24 (10 A) fuse in the under-dash fuse/relay box and the brake pedal position switch.

NO - Go to step 13.
Short the SCS line with the HDS.
Disconnect ECM/PCM connector A (49P). See ECM/PCM REPLACEMENT .
Check for continuity between brake pedal position switch 4P connector terminal No. 2 and body ground.

Fig 3: Checking Continuity Between Brake Pedal Position Switch 4P Connector Terminal No. 2 & Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES - Repair short to body ground in the wire between the brake pedal position switch and the ECM/PCM.

NO - Install a new No. 24 (10 A) fuse in the under-dash fuse/relay box, then go to step 16.
Reconnect all connectors.
Turn the ignition switch to ON (II).
Clear the DTC with the HDS.
Turn the ignition switch to LOCK (0).
Test-drive the vehicle at 10 km/h (6 mph) or more.
NOTE: Drive the vehicle on the road, not on a lift.
Check for DTCs with the HDS.
Is DTC 68-21 indicated?

YES - Go to step 32 .

NO - The troubleshooting is complete.
Measure the voltage between brake pedal position switch 4P connector terminal No. 1 and body ground.

Fig 4: Measuring Voltage Between Brake Pedal Position Switch 4P Connector Terminal No. 1 & Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there battery voltage?

YES - Go to step 23.

NO - Repair an open in the wire between the No. 24 (10 A) fuse in the under-dash fuse/relay box and the brake pedal position switch.
Short the SCS line with the HDS.
Disconnect ECM/PCM connector A (49P). See ECM/PCM REPLACEMENT .
Check for continuity between brake pedal position switch 4P connector terminal No. 2 and ECM/PCM connector terminal A42.

Fig 5: Checking Continuity Between Brake Pedal Position Switch 4P & ECM/PCM Connector A (49P) Terminal
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES - Go to step 26

NO - Repair an open in the wire between the ECM/PCM and the brake pedal position switch.
Reconnect all connectors.
Update the ECM/PCM if it does not have the latest software (see ECM/PCM UPDATE ), or substitute a known-good ECM/PCM (see SUBSTITUTING THE ECM/PCM ).
Clear the DTC with the HDS.
Turn the ignition switch to LOCK (0).
Test-drive the vehicle. Drive the vehicle at 7 mph(10 km/h) or more.
NOTE: Drive the vehicle on a straight section of road, not on a lift.
Check for DTCs with the HDS.
Is DTC 68-21 indicated?

YES - Check for loose terminals in the ECM/PCM connector A (44P). If the PCM was updated, substitute a known-good ECM/PCM, (see SUBSTITUTING THE ECM/PCM ), then retest. If the ECM/PCM was substituted, go to step 1.

NO - The troubleshooting is complete.
Update the VSA modulator-control unit if it does not have the latest software (see VSA MODULATOR-CONTROL UNIT UPDATE ).
Turn the ignition switch to LOCK (0).
Test-drive the vehicle at 10 km/h (6 mph) or more.
NOTE: Drive the vehicle on a straight section of road, not on a lift.
Check for DTCs with the HDS.
Is DTC 68-21 indicated?

YES - Check for loose terminals in the VSA modulator-control unit 36P connector. If the symptom/indication is still present, replace the VSA modulator-control unit (see VSA MODULATOR-CONTROL UNIT REMOVAL AND INSTALLATION ).

NO - If the VSA modulator-control unit was updated, troubleshooting is complete. If any other DTCs are indicated, go to the indicated DTCs troubleshooting.