EPS Symptom Troubleshooting - EPS indicator does not go off, and no DTCs are stored
EPS indicator does not go off, and no DTCs are stored
- 1. Problem verification:
- 1. Start the engine.
- 2. Check the EPS indicator.
Does the EPS indicator come on, then go off?
YES
Intermittent failure, the system is OK at this time.
NO
Go to step 2.
- 2. DTC check:
- 1. Test-drive the vehicle at 19 mph (30 km/h).
- 2. Check for DTCs with the HDS.
DTC Description DTC Freeze Frame Are there DTCs indicated?
YES
Go to indicated DTC's troubleshooting.
NO
Go to step 3.
- 3. Gauge control module operation check:
- 1. Do the gauge control module self-diagnostic function .
Does the EPS indicator blink?
YES
Go to step 4.
NO
- 4. Body electrical system DTC check:
- 1. Check for DTCs in the gauge control module with the HDS.
DTC Description DTC Are there DTCs indicated?
YES
Go to indicated DTC's troubleshooting.
NO
Go to step 5.
- 5. Fuse check 1:
- 1. Turn the vehicle to the OFF (LOCK) mode.
- 2. Check the following fuse.
Fuse No. A1-1 (70 A) Location Under-hood fuse/relay box Is the fuse OK?
YES
The fuse is OK. Reinstall the fuse, then go to step 6.
NO
Replace the fuse. If the fuse blows again, repair the short to ground on the No. A1-1 (70 A) fuse circuit.
- 6. Fuse check 2:
- 1. Check the following fuse.
Fuse No. B24 (7.5 A) Location Under-dash fuse/relay box Is the fuse OK?
YES
The fuse is OK. Reinstall the fuse, then go to step 7.
NO
Replace the fuse. Turn the vehicle to the ON mode, then to the OFF (LOCK) mode. If the fuse blows again, repair the short to ground on the No. B24 (7.5 A) fuse circuit.
- 7. Open wire check (+B EPS line):
- 1. Disconnect the following connector.
EPS control unit connector A (11P) - 2. Measure the voltage between test points 1 and 2.
Test condition Vehicle OFF (LOCK) mode EPS control unit connector A (11P): disconnected Test point 1 EPS control unit connector A (11P) No. 2 Test point 2 Body ground Is there battery voltage?
YES
The +B EPS wire is OK. Go to step 8.
NO
Repair an open in the wire between the EPS control unit and the No. A1-1 (70 A) fuse in the under-hood fuse/relay box.
- 8. Open wire check (IG1 ABS/VSA line):
- 1. Turn the vehicle to the ON mode.
- 2. Measure the voltage between test points 1 and 2.
Test condition Vehicle ON mode EPS control unit connector A (11P): disconnected Test point 1 EPS control unit connector A (11P) No. 11 Test point 2 Body ground Is there battery voltage?
YES
The IG1 ABS/VSA wire is OK. Go to step 9.
NO
Repair an open in the wire between the EPS control unit and the No. B24 (7.5 A) fuse in the under-dash fuse/relay box.
- 9. Open wire check (GND line):
- 1. Turn the vehicle to the OFF (LOCK) mode.
- 2. Check for continuity between test points 1 and 2.
Test condition Vehicle ON mode EPS control unit connector A (11P): disconnected Test point 1 EPS control unit connector A (11P) No. 1 Test point 2 Body ground Is there continuity?
YES
The GND wire is OK. Go to step 10.
NO
Repair an open in the wire between the EPS control unit and body ground (G403).
- 10.Open wire check (F-CAN_H, F-CAN_L lines):
- 1. Disconnect the following connector.
Gauge control module connector A (32P) - 2. Check for continuity between test points 1 and 2.
Test condition Vehicle OFF (LOCK) mode EPS control unit connector A (11P): disconnected Gauge control module connector A (32P): disconnected Test point 1 EPS control unit connector A (11P) No. 7 Test point 2 Gauge control module connector A (32P) No. 19 Test point 1 EPS control unit connector A (11P) No. 9 Test point 2 Gauge control module connector A (32P) No. 20 Is there continuity?
YES
The F-CAN_H and F-CAN_L wires are OK. Go to step 11.
NO
Repair an open in the wire between the gauge control module and the EPS control unit.
- 11.EPS control unit check (update):
- 1. Reconnect the following connectors.
EPS control unit connector A (11P) Gauge control module connector A (32P) - 2. Update the EPS control unit if it does not have the latest software.
- 3. Turn the vehicle to the OFF (LOCK) mode.
- 4. Start the engine.
- 5. Check the EPS indicator.
Does the EPS indicator come on, then go off?
YES
Troubleshooting is complete.
NO