NO.2 ELECTRIC POWER STEERING (EPS) WARNING LIGHT DOES NOT GO OUT EVEN THOUGH ENGINE HAS STARTED

id060300800900

2

EPS warning light does not go out even though engine has started.

TROUBLESHOOTING HINTS

•  EPS system malfunction

―  Wiring harness malfunction

―  Connector condition malfunction

―  Torque sensor malfunction

―  EPS motor malfunction

―  Fuse malfunction

―  EPS control module malfunction

•  EPS control module detects an EPS system malfunction even though the EPS system is normal.

•  CAN communication line malfunction

―  Vehicle speed signal malfunction

―  Engine speed signal malfunction

―  CAN wiring harness malfunction

•  EPS warning light circuit malfunction in the instrument cluster

•  CAN wiring harness malfunction

―  Malfunction in wiring harness between EPS control module and instrument cluster

Diagnostic procedure

STEP	INSPECTION		ACTION
1	VERIFY WHETHER MALFUNCTION IS IN INSTRUMENT CLUSTER OR ELSEWHERE • Turn on all warning lights and indicator lights using the instrument cluster PID ‘’WL+IL’’ of active command modes function using the M-MDS. (See PID/DATA MONITOR INSPECTION [INSTRUMENT CLUSTER].) • Does the EPS warning light turn on according to simulation function?	Yes	Go to the next step.
1		No	Replace the instrument cluster. (See INSTRUMENT CLUSTER REMOVAL/INSTALLATION.)
2	CONFIRM INSTRUMENT CLUSTER DTC • Retrieve the instrument cluster DTC using the M-MDS. (See DTC INSPECTION [INSTRUMENT CLUSTER].) • Is there any DTC retrieved?	Yes	Go to the applicable DTC troubleshooting procedure. (See DTC TABLE [INSTRUMENT CLUSTER].)
2		No	Go to the next step.
3	INSPECT CONNECTION OF EPS CONTROL MODULE • Is the EPS control module connector connected securely?	Yes	Go to the next step.
3		No	Connect the connector securely, then go to the next step.
4	CONFIRM EPS CONTROL MODULE DTC • Retrieve the EPS control module DTC using the M-MDS. (See ELECTRIC POWER STEERING (EPS) ON-BOARD DIAGNOSIS.) • Is there any DTC retrieved?	Yes	Go to the applicable DTC troubleshooting procedure. (See ELECTRIC POWER STEERING (EPS) ON-BOARD DIAGNOSIS.)
4		No	Go to the next step.
5	VERIFY WHETHER MALFUNCTION IS IN EPS CONTROL MODULE POWER SUPPLY (TERMINAL 1B) OR ELSEWHERE • Switch the ignition to ON. • Monitor EPS control module PID “VPWR” using the M-MDS. • Is the monitored approx. 12 V?	Yes	Verify that the symptom is remained, replace the EPS control module. (See EPS CONTROL MODULE REMOVAL/INSTALLATION.)
5		No	Go to the next step.
6	INSPECT BATTERY • Is the battery normal?	Yes	Go to the next step.
6	INSPECT BATTERY • Is the battery normal?	No	Charge or replace the battery, then go to the next step.
7	INSPECT CHARGING SYSTEM WITH ELECTRICAL LOAD OPERATING • Is the voltage normal with electrical load (A/C, headlight, rear window defroster, etc.) on the engine idling?	Yes	Go to the next step.
7		No	Inspect the charging system (drive belt tension, generator, etc.).
8	INSPECT EPS POWER SUPPLY FUSE • Is the EPS power supply fuse normal?	Yes	Go to the next step.
8		No	Inspect for short to GND on blown fuse’s circuit. Repair or replace as necessary. Install appropriate amperage fuse.
9	VERIFY MALFUNCTION IS IN WIRING HARNESS (BETWEEN EPS CONTROL MODULE POWER SUPPLY AND EPS CONTROL MODULE FOR CONTINUITY) OR EPS CONTROL MODULE • Switch the ignition to ON. • Measure the voltage at the EPS control module terminal 2A • Is voltage approx. 12 V?	Yes	Replace the EPS control module. (See EPS CONTROL MODULE REMOVAL/INSTALLATION.)
9		No	• Without advanced keyless entry and push button start system ― Inspect for open circuit between EPS control module terminal 2A and ignition switch. • With advanced keyless entry and push button start system ― Inspect for open circuit between EPS control module terminal 2A and ignition relay. Repair or replace as necessary.