EPS System

Control System DTCs

EPS DTC Troubleshooting: 39-03

DTC 39-03 : EPS Control Unit Internal Circuit (Power Self-Holding Circuit)

NOTE: Before you troubleshoot, record all freeze data and any on-board snapshot, and review the how to troubleshoot the EPS Initial Inspection and Diagnostic Overview.






1. Problem verification:

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

-2. Clear the DTC with the HDS.

-3. Turn the ignition switch to LOCK (0).

-4. Wait 30 seconds or more.

-5. Turn the ignition switch to ON (II).

-6. Check for DTCs with the HDS.






Is DTC 39-03 indicated?
-YES- The failure is duplicated. Go to step 2.
-NO- Intermittent failure, the system is OK at this time.

2. EPS control unit check (update):

-1. Update the EPS control unit Programming and Relearning if it does not have the latest software.

-2. Turn the ignition switch to LOCK (0).

-3. Wait 30 seconds or more.

-4. Turn the ignition switch to ON (II).

-5. Check for DTCs with the HDS.






Is DTC 39-03 indicated?
-YES- Replace the EPS control unit Service and Repair.
-NO- Troubleshooting is complete.