Advanced Hydraulic Booster

Advanced Hydraulic Booster DTC Troubleshooting: 24

DTC 24:

Brake Pedal Stroke Sensor Malfunction

1. Turn the ignition switch to ON (II).

2. Clear the DTC with the HDS.

3. With the ignition switch in ON (II), press the brake pedal several times.

4. Check for DTCs with the HDS.

Is DTC 24 indicated?

YES -

Go to step 5.

NO -

Intermittent failure, the system is OK at this time. Check for loose terminals at the brake pedal stroke sensor 3P connector and the servo unit 25P connector. Refer to intermittent failures troubleshooting.�

5. Turn the ignition switch to LOCK (0).

6. Check the brake pedal stroke sensor and its connector for damage and proper installation Service and Repair.

Is the brake pedal stroke sensor installation OK?

YES -

Go to step 7.

NO -

Reinstall the brake pedal stroke sensor, and check the mounting position Service and Repair.�

7. Disconnect the brake pedal stroke sensor 3P connector.

8. Disconnect the servo unit 25P connector.

9. Check for continuity between servo unit 25P connector terminals No. 2, No. 14, No. 18, and brake pedal stroke sensor 3P connector terminals No. 3, No. 2, No. 1 individually.





Is there continuity?

YES -

Go to step 10.

NO -

Repair an open in the wire between the brake pedal stroke sensor and the servo unit.�

10. Substitute a known-good brake pedal stroke sensor Service and Repair.

11. Turn the ignition switch to ON (II).

12. Clear the DTC with the HDS.

13. With the ignition switch in ON (II), press the brake pedal several times.

14. Check for DTCs with the HDS.

Is DTC 24 indicated?

YES -

Replace the servo unit Service and Repair.�

NO -

Replace the original brake pedal stroke sensor Service and Repair.�