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

BHE060301038W06

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 | INSPECT EPS CONTROL MODULE AND DLC-2 FOR CONTINUITY OR SHORT • Perform the DTC inspection. • Is an error message regarding the communication between the EPS control module and the WDS or equivalent displayed? | Yes | If a communication error message is displayed even after inspecting according to the procedures displayed on the WDS or equivalent, go to Step 5.
No | Go to the next step.
2 | INSPECT FOR DTCS IN EPS CONTROL MODULE • Have DTCs been recorded in the memory? | Yes | Perform inspection using the appropriate DTC.
No | Go to the next step.
3 | INSPECT PID/DATA IN EPS CONTROL MODULE • Select the following items using the WDS or equivalent Datalogger function. – EPSLAMP (EPS warning light) • Is the EPSLAMP ON after the engine is already running? | Yes | Repeat the DTC inspection. If no DTCs have been recorded in the memory, replace the EPS control module. (See EPS CONTROL MODULE REMOVAL/INSTALLATION.)
No | The EPS system is normal. Go to the next step.
4 | INSPECT WIRING HARNESS FOR CONTINUITY BETWEEN EPS CONTROL MODULE AND INSTRUMENT CLUSTER • Disconnect the EPS control module connector and the instrument cluster connector. • Inspect for continuity between the EPS control module and the instrument cluster at the following terminals. – Terminal 2M (13-pin) and terminal 1J (12-pin) – Terminal 2K (13-pin) and terminal 1L (12-pin) • Is there continuity? | Yes | Inspect the instrument cluster. (EPS warning light circuit malfunction in the instrument cluster) (See INSTRUMENT CLUSTER INPUT/OUTPUT CHECK MODE.)
No | Repair the wiring harness between the EPS control module and the instrument cluster, then reinspect the malfunction symptoms.
5 | INSPECT WIRING HARNESS FOR CONTINUITY BETWEEN EPS CONTROL MODULE AND DLC-2 • Disconnect the EPS control module connector. • Inspect for continuity between the EPS control module and the DLC-2 at the following terminals. – Terminal 2M (13-pin) and CAN_H terminal (16-pin) – Terminal 2K (13-pin) and CAN_L terminal (16-pin) • Is there continuity? | Yes | Go to the next step.
No | Repair the wiring harness between the EPS control module and the DLC-2, then repeat from Step 1 if the malfunction.
6 | INSPECT VOLTAGE AT EPS CONTROL MODULE • Measure the voltage at EPS control module connector terminal 2P (13-pin, IG1 signal). • Is the voltage within the following range? – IG ON: 10-16 V | Yes | Inspect the EPS control module connectors, then repeat from Step 1 if the malfunction recurs. If the same symptoms recur, replace the EPS control module. (See EPS CONTROL MODULE REMOVAL/INSTALLATION.)
No | Inspect the battery. If the battery condition is normal, inspect and repair the EPS control module wiring harness (IG1 signal). Reinspect the malfunction symptoms.