DTC: U3003-1C

DTC U3003-1C  : 12V Battery Voltage Failure

NOTE: Before you troubleshoot, review the general troubleshooting information .

DTC (EPS)

1. Problem verification

   -1. Turn the vehicle to the ON mode.

   -2. Clear the DTC with the HDS.

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

   -4. Turn the steering wheel to left and right several times, and keep holding each direction for 35 seconds.

   -5. Check for DTCs with the HDS.

   DTC Description	DTC	Freeze Frame
   U3003-1C 12V Battery Voltage Failure

   Is DTC U3003-1C indicated?

   YES 

   The failure is duplicated. Go to step 2.

   NO 

   Intermittent failure, the system is OK at this time. If the freeze data/on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the freeze data/on-board snapshot.

2. EPS control unit parameter check 1

   -1. Check the parameter (s) below with the HDS.

   Signal	Threshold		Current conditions
   	Values	Unit	Values	Unit
   BATTERY VOLTAGE	More than 18	V

   Is indicated more than 18 V?

   YES 

   Check the 12 volt battery , and check the PGM-FI DTCs .

   NO 

   Go to step 3.

3. EPS control unit parameter check 2

   -1. Check the parameter (s) below with the HDS.

   Signal	Threshold		Current conditions
   	Values	Unit	Values	Unit
   BATTERY VOLTAGE	Less than 8.3	V

   Is indicated less than 8.3 V?

   YES 

   Go to step 4.

   NO 

   Check for loose terminals and poor connections at the EPS control unit connectors. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting. If they are OK, replace the steering gearbox .

4. Fuse check

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

   -2. Check the following fuse.

   Fuse

   No. A2-7

   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. A2-7 fuse circuit.

5. Open wire check (+B EPS line)

   -1. Disconnect the following connector.

   EPS control unit connector A (2P)

   -2. Measure the voltage between test points 1 and 2.

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

   Test point 2

   Body ground

   Is there battery voltage?

   YES 

   The +B EPS wire is OK. Check for loose terminals and poor connections at the EPS control unit connectors. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting. If they are OK, replace the steering gearbox .

   NO 

   Repair an open in the wire between the EPS control unit and the No. A2-7 fuse .