POWER STEERING MALFUNCTION INDICATOR LIGHT/POWER STEERING MALFUNCTION INDICATION DOES NOT ILLUMINATE WITH IGNITION SWITCHED ON [ELECTRIC POWER STEERING (EPS)]

id0603a2803100

Troubleshooting item

Power steering malfunction indicator light/power steering malfunction indication does not illuminate with ignition switched ON

Possible cause

•  Power steering malfunction indicator light/power steering malfunction indication circuit malfunction in the instrument cluster.

•  An error originates from the Electric Power Steering (EPS) control module, and the off signal is generated.

―  Electric Power Steering (EPS) control module malfunction

Troubleshooting item	Power steering malfunction indicator light/power steering malfunction indication does not illuminate with ignition switched ON
Possible cause	• Power steering malfunction indicator light/power steering malfunction indication circuit malfunction in the instrument cluster. • An error originates from the Electric Power Steering (EPS) control module, and the off signal is generated. ― Electric Power Steering (EPS) control module malfunction

Diagnostic Procedure

Step

Inspection

Results

Action

1

VERIFY POWER STEERING MALFUNCTION INDICATOR LIGHT/POWER STEERING MALFUNCTION INDICATION ILLUMINATION CONDITION

•  Switch the ignition ON (engine off or on).

•  Is the power steering malfunction indicator light/power steering malfunction indication illuminated?

Yes

Malfunction may be temporary.

No

Go to the next step.

2

VERIFY COMMUNICATION CONDITION BETWEEN ELECTRIC POWER STEERING (EPS) CONTROL MODULE AND BODY CONTROL MODULE (BCM)

•  Using the M-MDS, display the following PIDs for the body control module (BCM).
(See PID/DATA MONITOR INSPECTION.)

―  EPS_NETWORK

•  Is the EPS_NETWORK PID value "Node Attached and Communicate correctly"?

Yes

Perform the body control module (BCM) configuration, then repeat the inspection from Step 1.

If the malfunction recurs, replace the instrument cluster.

(See INSTRUMENT CLUSTER REMOVAL/INSTALLATION.)

No

Electric Power Steering (EPS) control module malfunction.

Replace the Electric Power Steering (EPS) control module.

(See STEERING WHEEL AND COLUMN REMOVAL/INSTALLATION.)

Perform the repair completion verification.

Repair completion verification

VERIFY THAT MALFUNCTION SYMPTOMS DO NOT RECUR AFTER REPAIR

•  Install/connect the part removed/disconnected during the troubleshooting procedure.

•  Has the malfunction symptom been eliminated?

Yes

Complete the symptom troubleshooting.

Explain to the customer what has been repaired.

No

Refer to the controller area network (CAN) malfunction diagnosis flow to inspect for a CAN communication error.

(See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW.)

If the CAN communication is normal, perform the diagnosis from Step 1.

Step	Inspection	Results	Action
1	VERIFY POWER STEERING MALFUNCTION INDICATOR LIGHT/POWER STEERING MALFUNCTION INDICATION ILLUMINATION CONDITION • Switch the ignition ON (engine off or on). • Is the power steering malfunction indicator light/power steering malfunction indication illuminated?	Yes	Malfunction may be temporary.
1		No	Go to the next step.
2	VERIFY COMMUNICATION CONDITION BETWEEN ELECTRIC POWER STEERING (EPS) CONTROL MODULE AND BODY CONTROL MODULE (BCM) • Using the M-MDS, display the following PIDs for the body control module (BCM). (See PID/DATA MONITOR INSPECTION.) ― EPS_NETWORK • Is the EPS_NETWORK PID value "Node Attached and Communicate correctly"?	Yes	Perform the body control module (BCM) configuration, then repeat the inspection from Step 1. If the malfunction recurs, replace the instrument cluster. (See INSTRUMENT CLUSTER REMOVAL/INSTALLATION.)
2		No	Electric Power Steering (EPS) control module malfunction. Replace the Electric Power Steering (EPS) control module. (See STEERING WHEEL AND COLUMN REMOVAL/INSTALLATION.) Perform the repair completion verification.
Repair completion verification	VERIFY THAT MALFUNCTION SYMPTOMS DO NOT RECUR AFTER REPAIR • Install/connect the part removed/disconnected during the troubleshooting procedure. • Has the malfunction symptom been eliminated?	Yes	Complete the symptom troubleshooting. Explain to the customer what has been repaired.
Repair completion verification		No	Refer to the controller area network (CAN) malfunction diagnosis flow to inspect for a CAN communication error. (See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW.) If the CAN communication is normal, perform the diagnosis from Step 1.