Manufacturer Code Charts: 73

Advanced Hydraulic Booster DTC Troubleshooting: 73

DTC 73:

Brake Fluid Level Switch Malfunction

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

2. Check the brake fluid level in the subreservoir.

Is brake fluid level OK?

YES -

Go to step 3.

NO -

Do the brake pad inspection: Front Front Brake Pad Inspection and Replacement, rear Rear Brake Pad Inspection and Replacement, check for brake fluid leaks or replace worn pads. Fill the fluid reservoir to the correct level or replace the pads, then go to step 3.

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

4. Clear the DTC with the HDS.

5. Turn the ignition switch to LOCK (0), then turn it to ON (II) again.

6. Check for DTCs with the HDS.

Is DTC 73 indicated?

YES -

Go to step 7.

NO -

Intermittent failure, the system is OK at this time.�

7. Clear the DTC with the HDS.

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

9. Disconnect the brake fluid level switch 2P connector Service and Repair.

10. Disconnect the gauge control module (tach) 36P connector Gauge Control Module Replacement.

11. Check for continuity between brake level switch 2P connector terminal No. 2 and body ground.





Is there continuity?

YES -

Repair a short to body ground in the wire between the gauge control module (tach) and the brake fluid level switch.�

NO -

Replace the subreservoir (brake fluid level switch is included) Service and Repair.�