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

id0603a2808800

Troubleshooting item

Power steering malfunction indicator light/power steering malfunction indication does not illuminate with main power switched ON (READY off)

Possible cause

•  Power steering malfunction indicator light/power steering malfunction indication 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 main power switched ON (READY off)
Possible cause	• Power steering malfunction indicator light/power steering malfunction indication 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

•  Main power is switched ON (READY off).

•  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.)

―  EPAS_NETWORK

•  Is the EPAS_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.

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 [L.H.D. (E)].)

(See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW [R.H.D.].)

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 • Main power is switched ON (READY off). • 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.) ― EPAS_NETWORK • Is the EPAS_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.
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 [L.H.D. (E)].) (See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW [R.H.D.].) If the CAN communication is normal, perform the diagnosis from Step 1.