Advanced Hydraulic Booster

Advanced Hydraulic Booster DTC Troubleshooting: 37, 38

DTC 37:

RNO Solenoid Valve Duty Limit Out

DTC 38:

RNC Solenoid Valve Duty Limit Out

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

2. Clear the DTC with the HDS.

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

4. Do the REGENERATIVE BRAKE TEST in the FUNCTION TEST with the HDS.

5. Check for DTCs with the HDS.

Is DTC 37 or 38 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.�