DTC 11-01

DTC Troubleshooting

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

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, and troubleshoot the alternator regulator circuit.