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:

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.
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:

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:

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:

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:

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):

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):

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):

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):

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


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):

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