EPS Symptom Troubleshooting - EPS indicator does not go off (2/4-door, With 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.

All DTCs check:

All DTCs check

?1.	Do the All DTCs check with the HDS.

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. A2-1

Is the fuse OK?


	YES

The fuse is OK. Reinstall the fuse, then go to step 5.


	NO

Replace the fuse. If the fuse blows again, repair a short to ground in the No. A2-1 fuse circuit.?

5.

Fuse check 2:

Fuse check 2

?1.

Check the following fuse.

Fuse

No. B34

Is the fuse OK?


	YES

The fuse is OK. Reinstall the fuse, then go to step 6.


	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. B34 fuse circuit.?

6.

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)

?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 B (6P): disconnected
Test point 1	EPS control unit connector B (6P) No. 5
Test point 2	Body ground

Is there battery voltage?


	YES

The IG1 VSA/ABS wire is OK. Go to step 7.


	NO

Repair an open in the wire between the EPS motor/control unit and the No. B34 fuse.?

7.

Open wire check (+B EPS line):

Open wire check (+B EPS line)

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

?2.

Disconnect the following connector.

EPS control unit connector A (2P)

?3.

Measure the voltage between test points 1 and 2.

Test condition	Vehicle OFF (LOCK) mode
	EPS control unit connector A (2P): disconnected
	EPS control unit connector B (6P): disconnected
Test point 1	EPS control unit connector A (2P) 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 motor/control unit and the No. A2-1 fuse.?

8.

Open wire check (GND line):

Open wire check (GND line)

?1.

Check for continuity between test points 1 and 2.

Test condition	Vehicle OFF (LOCK) mode
	EPS control unit connector A (2P): disconnected
	EPS control unit connector B (6P): disconnected
Test point 1	EPS control unit connector A (2P) No. 1
Test point 2	Body ground

Is there continuity?


	YES

The GND wire is OK. Go to step 9.


	NO

Repair an open in the wire between the EPS motor/control unit and body ground (G304).?

9.

F-CAN circuit communication check:

F-CAN circuit communication check

?1.

Reconnect the following connectors.

EPS control unit connector A (2P)

EPS control unit connector B (6P)

?2.	Select the FUNCTION TEST in the CAN gateway with the HDS, then select the F-CAN Bus Connected Unit Check.

Which result is indicated?


	EPS control unit is Not Available for Bus B

Go to step 10.


	Gauge control module is Not Available for Bus C

Go to step 11.


	EPS control unit and gauge control module are Detected

Intermittent failure, the system is OK at this time.?

10.

Open wire check (F-CAN B_H, F-CAN B_L lines):

Open wire check (F-CAN B_H, F-CAN B_L lines)

?1.

Disconnect the following connectors.

EPS control unit connector B (6P)

CAN gateway 16P connector

?2.

Check for continuity between test points 1 and 2.

Test condition	Vehicle OFF (LOCK) mode
	EPS control unit connector B (6P): disconnected
	CAN gateway 16P connector: disconnected
Test point 1	EPS control unit connector B (6P) No. 3
Test point 2	CAN gateway 16P connector (female terminals) No. 6:

Test point 1	EPS control unit connector B (6P) No. 1
Test point 2	CAN gateway 16P connector (female terminals) No. 14:

Is there continuity?


	YES

The F-CAN B_H and F-CAN B_L wires are OK. Check for poor connections or loose terminals at the CAN gateway and the EPS control unit connector. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting. If they are OK, replace the EPS motor/control unit.?


	NO

Repair an open in the wire between the CAN gateway and the EPS motor/control unit.?

11.

Open wire check (F-CAN C_H, F-CAN C_L lines):

Open wire check (F-CAN C_H, F-CAN C_L lines)

?1.

Disconnect the following connectors.

Gauge control module connector A (32P)

CAN gateway 16P connector

?2.

Check for continuity between test points 1 and 2.

Test condition	Vehicle OFF (LOCK) mode
	Gauge control module connector A (32P): disconnected
	CAN gateway 16P connector: disconnected
Test point 1	Gauge control module connector A (32P) No. 19
Test point 2	CAN gateway 16P connector (female terminals) No. 5:

Test point 1	Gauge control module connector A (32P) No. 20
Test point 2	CAN gateway 16P connector (female terminals) No. 13:

Is there continuity?


	YES

The F-CAN C_H and F-CAN C_L wires are OK. Check for poor connections or loose terminals at the CAN gateway and the gauge control module connector. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting. If they are OK, substitute a known-good gauge control module, then retest. If the indicators come on then go off after substitution, replace the original gauge control module.?


	NO

Repair an open in the wire between the CAN gateway and the gauge control module.?