EPS Warning
EPS WARNING LAMPDescription
^ Turns ON when there is a malfunction in EPS system. It indicates that fail-safe mode is engaged and enters a manual steering state (Control turning force steering wheel becomes heavy), fixed at a particular point or decreased simultaneously, to protect the system.
^ Also turns ON when ignition switch is turned ON, for purpose of lamp check. Turns OFF within a few seconds after READY mode if the system is in the normal condition.
EPS WARNING LAMP INDICATION:
Diagnosis Procedure
1. CHECK TERMINALS AND HARNESS CONNECTORS
Check EPS control unit pin terminals for damage or loose connection with harness connector.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair or replace the harnesses or connectors.
2. CHECK DTC WITH EPS CONTROL UNIT
With CONSULT-III
Perform EPS control unit self-diagnosis.
Is DTC "U0129" or "U0293" detected?
YES >> Proceed to LAN-16, "Trouble Diagnosis Flow Chart".
Trouble Diagnosis
NO >> GO TO 3.
3. CHECK EPS CONTROL UNIT IGNITION POWER SUPPLY CIRCUIT
1. Turn the ignition switch OFF.
2. Disconnect EPS control unit harness connector.
3. Check the voltage between EPS control unit harness connector and ground.
4. Turn the ignition switch ON.
5. Check the voltage between EPS control unit harness connector and ground.
Is the inspection result normal?
YES >> GO TO 4.
NO >> ^ Check the following. If any items are damaged, repair or replace damaged parts.
- 10A fuse (#34)
- Harness for short or open between IPDM E/R and EPS control unit harness connector
4. CHECK EPS CONTROL UNIT GROUND CIRCUIT
1. Turn the ignition switch OFF.
2. Disconnect EPS control unit harness connector.
3. Check the continuity between EPS control unit harness connector and ground.
Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >> GO TO 5.
NO >> Repair open circuit or short to ground or short to power in harness or connectors.
5. CHECK DTC WITH COMBINATION METER
With CONSULT-III
Perform the self-diagnosis of the combination meter.
Is any error system detected?
YES >> Check the error system.
NO >> GO TO 6.
6. CHECK EPS WARNING LAMP OPERATION
1. Turn the ignition switch ON (READY).
2. Check EPS warning lamp operation.
Does EPS warning lamp turn OFF after being ON for a few seconds?
YES >> INSPECTION END
NO >> Replace EPS control unit.