11-02

EPS DTC Troubleshooting: 11-01, 11-02

DTC 11-01: Low/High IG1-terminal Voltage (Initial Diagnosis)

DTC 11-02: Low/High IG1-terminal Voltage (Regular Diagnosis)

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

2. Clear the DTC with the HDS.

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

4. Start the engine.

5. Wait at least 60 seconds.

Does the EPS indicator come on?
YES - Go to step 6.

NO - Check for loose terminals or poor connections. If the connections are good, the system is OK at this time.


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

7. Disconnect EPS control unit connector D (28P).

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

9. Wait at least 60 seconds.

10. Measure the voltage between EPS control unit connector D (28P) terminal No. 16 and body ground.

Is there battery voltage?
YES - Check for loose terminals in the EPS control unit connectors and repair if necessary If no poor connections are found, replace the EPS control unit.. Service and Repair

NO - If there is no voltage, or the voltage is lower than specified, repair an open or high resistance in the wire between the No 4 (7.5 A) fuse in the under-dash fuse/relay box and EPS control unit. If the wire checks OK, check the battery,. Testing and Inspection and troubleshoot the alternator regulator circuit. Alternator and Regulator Circuit Troubleshooting