EPS Indicator Does Not Go Off, and No DTCs Are Stored
EPS indicator does not go off, and no DTCs are stored1. Turn the ignition switch ON (II).
2. Check for DTCs with the HDS.
Are any DTCs indicated?
YES - Troubleshoot the indicated DTC.
NO - Go to step 3.
3. Start the engine.
4. Check the WARNING LAMP in the EPS DATA LIST with the HDS.
Is OFF indicated?
YES - Go to step 10.
NO - Go to step 5.
5. Turn the ignition switch OFF.
6. Check the No. 2 (60 A) fuse in the under-hood fuse/relay box.
Is the fuse OK?
YES - Reinstall the fuse, and go to step 7.
NO - Replace the fuse, and recheck. If the fuse is blown, check for a short to body ground in this fuse circuit.
7. Disconnect EPS control unit connector A (2P).
8. Measure voltage between EPS control unit connector A (2P) terminal No. 2 and body ground.
Is there battery voltage?
YES - Go to step 9.
NO - Repair open in the wire between the EPS control unit and the under-hood fuse/relay box.
9. Check for continuity between EPS control unit connector A (2P) terminal No. 1 and body ground.
Is there continuity?
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 - Repair open in the wire between the EPS control unit and body ground (G451).
10. Measure the voltage between EPS control unit connector D (28P) terminal No. 4 and body ground.
Is there any voltage?
YES - Substitute a known-good gauge control module, then go to step 1 and recheck. If it is OK, replace the original gauge control module.
NO - Repair open in the wire between the gauge control module and the EPS control unit.