Manufacturer Code Charts: 43

Advanced Hydraulic Booster DTC Troubleshooting: 43

DTC 43:

Master Cylinder 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 43 indicated?

YES -

Replace the servo unit Service and Repair.�

NO -

Go to step 5.

5. Do the HYDRAULIC BOOSTER CAS TEST in the FUNCTION MENU with the HDS.

6. Check for DTCs with the HDS.

Is DTC 43 indicated?

YES -

Replace the servo unit Service and Repair.�

NO -

Intermittent failure, the system is OK at this time. Check for loose terminals at the servo unit25P connector. Refer to intermittent failures troubleshooting Initial Inspection and Diagnostic Overview.�