68-11
VSA DTC Troubleshooting: 68-11
DTC 68-11:
Brake Pedal Position Switch Stuck OFF
NOTE:
- Troubleshoot any fuel and emissions DTCs first.
- Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information Reading and Clearing Diagnostic Trouble Codes.
1. Start the engine.
2. Check the BRAKE PRESSURE in the VSA DATA LIST with the HDS.
NOTE: Do not press the brake pedal.
Is there 10 MPa or less?
YES -
Go to step 3.
NO -
Check for brake drag Symptom Related Diagnostic Procedures or a misadjusted brake pedal position switch Adjustments. If they are normal, go to step 32.
3. 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.
NO -
Go to step 4.
4. Turn the ignition switch to LOCK (0).
5. Disconnect the brake pedal position switch 4P connector Service and Repair.
6. Connect the brake pedal position switch 4P connector terminals No. 1 and No. 2 with a jumper wire.
7. Turn the ignition switch to ON (II).
8. Check the BRAKE SWITCH in the VSA DATA LIST with the HDS.
Does it indicate ON?
YES -
Check the brake pedal position switch adjustment Adjustments. If it is OK, replace the brake pedal position switch Service and Repair.
NO -
Go to step 9.
9. Turn the ignition switch to LOCK (0).
10. Disconnect the jumper wire.
11. Check the No. 13 (15 A) fuse in the under-hood fuse/relay box.
Is the fuse blown?
YES -
Go to step 12.
NO -
Reinstall the checked fuse, then go to step 22.
12. Check for continuity between brake pedal position switch 4P connector terminal No. 1 and body ground.
Is there continuity?
YES -
Repair a short to body ground in the wire between the No. 13 (15 A) fuse in the under-hood fuse/relay box and the brake pedal position switch.
NO -
Go to step 13.
13. Short the SCS line with the HDS.
14. Disconnect PCM connector A (49P) Service and Repair.
15. Check for continuity between brake pedal position switch 4P connector terminal No. 2 and body ground.
Is there continuity?
YES -
Repair a short to body ground in the wire between the brake pedal position switch and the PCM.
NO -
Install a new No. 13 (15 A) fuse in the under-hood fuse/relay box, then go to step 16.
16. Reconnect all connectors.
17. Turn the ignition switch to ON (II).
18. Clear the DTC with the HDS.
19. Turn the ignition switch to LOCK (0).
20. Test-drive the vehicle at 6 mph(10 km/h) or more.
NOTE: Drive the vehicle on the road, not on a lift.
21. Check for DTCs with the HDS.
Is DTC 68-11 indicated?
YES -
Check for loose terminals in the PCM connector A (49P). If the PCM was updated, substitute a known-good PCM, then retest. If the PCM was substituted, go to step 1.
NO -
The troubleshooting is complete.
22. Measure the voltage between brake pedal position switch 4P connector terminal No. 1 and body ground.
Is there battery voltage?
YES -
Go to step 23.
NO -
Repair an open in the wire between the No. 13 (15 A) fuse in the under-hood fuse/relay box and the brake pedal position switch.
23. Short the SCS line with the HDS.
24. Disconnect PCM connector A (49P) Service and Repair.
25. Check for continuity between brake pedal position switch 4P connector terminal No. 2 and PCM connector A (49P) terminal No. 8.
Is there continuity?
YES -
Go to step 26.
NO -
Repair an open in the wire between the PCM and the brake pedal position switch.
26. Reconnect all connectors.
27. Update the PCM if it does not have the latest software PCM Update, or substitute a known-good PCM.
28. Clear the DTC with the HDS.
29. Turn the ignition switch to LOCK (0).
30. Test-drive the vehicle at 6 mph(10 km/h) or more.
NOTE: Drive the vehicle on the road, not on a lift.
31. Check for DTCs with the HDS.
Is DTC 68-11 indicated?
YES -
Check for loose terminals in the PCM connector A (49P). If the PCM was updated, substitute a known-good PCM, then retest. If the PCM was substituted, go to step 1.
NO -
The troubleshooting is complete.
32. Update the VSA modulator-control unit if it does not have the latest software Testing and Inspection.
33. Turn the ignition switch to LOCK (0).
34. Test-drive the vehicle at 6 mph(10 km/h) or more.
NOTE: Drive the vehicle on the road, not on a lift.
35. Check for DTCs with the HDS.
Is DTC 68-11 indicated?
YES -
Check for loose terminals in the VSA modulator-control unit 36P connector. If the VSA modulator-control unit was updated and the symptom/indication is still present, replace the VSA modulator-control unit Service and Repair, then retest.
NO -
Troubleshooting is complete. If any other DTCs are indicated, go to the indicated DTCs troubleshooting.