EPS Symptom Troubleshooting - EPS indicator does not go off (Without LKAS)

1.

Problem verification:

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:

DTC check

?1.

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:

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

Replace the gauge control module.?

4.

Fuse check 1:

Fuse check 1

?1.	Turn the vehicle to the OFF (LOCK) mode.

?2.

Check the following fuse.

Fuse	No. C27 (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 5.


	NO

Replace the fuse. Turn the vehicle to the ON mode, then to the OFF (LOCK) mode. If the fuse blows again, repair a short to ground in the No. C27 (7.5 A) fuse circuit.?

5.

Fuse check 2:

Fuse check 2

?1.

Check the following fuse.

Fuse	No. D1-1 (70 A)^*1
	No. D1-1 (60 A)^*2
Location	Auxiliary under-dash fuse box
*1: USA and Canada models
*2: Mexico models

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 a short to ground in the No. D1-1 (70 A) fuse circuit (USA and Canada models) or the No. D1-1 (60A) fuse circuit (Mexico models).?

6.

Open wire check (+B EPS line):

Open wire check (+B EPS line)

?1.

Disconnect the following connector.

EPS control unit connector C (2P)^*1

EPS control unit connector A (2P)^*2

*1: USA and Canada models

*2: Mexico models

?2.

Measure the voltage between test points 1 and 2.

Test condition	Vehicle OFF (LOCK) mode
	EPS control unit connector C (2P)^*1: disconnected
	EPS control unit connector A (2P)^*2: disconnected
Test point 1	EPS control unit connector C (2P) No. 2^*1
	EPS control unit connector A (2P) No. 1^*2
Test point 2	Body ground
*1: USA and Canada models
*2: Mexico models

Is there battery voltage?


	YES

The +B EPS wire is OK. Go to step 7.


	NO

Repair an open in the wire between the EPS control unit and the No. D1-1 (70 A) fuse (USA and Canada models) or the No. D1-1 (60A) fuse (Mexico models).?

7.

Open wire check (IG1 VSA/ABS line):

Open wire check (IG1 VSA/ABS line)

?1.

Disconnect the following connector.

EPS control unit connector B (6P)^*1

EPS control unit connector B (5P)^*2

*1: USA and Canada models

*2: Mexico models

?2.	Turn the vehicle to the ON mode.

?3.

Measure the voltage between test points 1 and 2.

Test condition	Vehicle ON mode
	EPS control unit connector C (2P)^*1: disconnected
	EPS control unit connector A (2P)^*2: disconnected
	EPS control unit connector B (6P)^*1: disconnected
	EPS control unit connector B (5P)^*2: disconnected
Test point 1	EPS control unit connector B (6P) No. 1^*1
	EPS control unit connector B (5P) No. 5^*2
Test point 2	Body ground
*1: USA and Canada models
*2: Mexico models

Is there battery voltage?


	YES

The IG1 VSA/ABS wire is OK. Go to step 8.


	NO

Repair an open in the wire between the EPS control unit and the No. C27 (7.5 A) fuse.?

8.

Open wire check (GND line):

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 OFF (LOCK) mode
	EPS control unit connector C (2P)^*1: disconnected
	EPS control unit connector A (2P)^*2: disconnected
	EPS control unit connector B (6P)^*1: disconnected
	EPS control unit connector B (5P)^*2: disconnected
Test point 1	EPS control unit connector C (2P) No. 1^*1
	EPS control unit connector A (2P) No. 2^*2
Test point 2	Body ground
*1: USA and Canada models
*2: Mexico models

Is there continuity?


	YES

The GND wire is OK. Go to step 9.


	NO

Repair an open in the wire between the EPS control unit and body ground (G402).?

9.

Open wire check (F-CAN_H, F-CAN_L lines):

Open wire check (F-CAN_H, F-CAN_L lines)

?1.

Disconnect the following connector.

Gauge control module 32P connector

?2.

Check for continuity between test points 1 and 2.

Test condition	Vehicle OFF (LOCK) mode
	EPS control unit connector C (2P)^*1: disconnected
	EPS control unit connector A (2P)^*2: disconnected
	EPS control unit connector B (6P)^*1: disconnected
	EPS control unit connector B (5P)^*2: disconnected
	Gauge control module 32P connector: disconnected
Test point 1	EPS control unit connector B (6P) No. 4^*1
	EPS control unit connector B (5P) No. 1^*2
Test point 2	Gauge control module 32P connector No. 21

Test point 1	EPS control unit connector B (6P) No. 3^*1
	EPS control unit connector B (5P) No. 3^*2
Test point 2	Gauge control module 32P connector No. 22
*1: USA and Canada models
*2: Mexico models

Is there continuity?


	YES

The F-CAN_H and F-CAN_L wires are OK. Go to step 10.


	NO

Repair an open in the wire between the gauge control module and the EPS control unit.?

10.

EPS control unit check (update):

EPS control unit check (update)

?1.

Reconnect the following connectors.

EPS control unit connector C (2P)^*1

EPS control unit connector A (2P)^*2

EPS control unit connector B (6P)^*1

EPS control unit connector B (5P)^*2

Gauge control module 32P connector

*1: USA and Canada models

*2: Mexico models

?2.	Update the EPS control unit if it does not have the latest software.

?3.	Turn the vehicle to the OFF (LOCK) mode, then start the engine.

?4.	Check the EPS indicator.

Does the EPS indicator come on, then go off?


	YES

Troubleshooting is complete.?


	NO

Check for loose terminals and poor connections at the EPS control unit connectors. If the EPS control unit was updated and the symptom/indication is still present, replace the steering column/EPS control unit.?