NO.2 ELECTRIC POWER STEERING (EPS) WARNING LIGHT/MASTER WARNING LIGHT DOES NOT TURN OFF EVEN THOUGH ENGINE HAS STARTED [ELECTRIC POWER STEERING (EPS)]
NO.2 ELECTRIC POWER STEERING (EPS) WARNING LIGHT/MASTER WARNING LIGHT DOES NOT TURN OFF EVEN THOUGH ENGINE HAS STARTED [ELECTRIC POWER STEERING (EPS)]
SM2335527
id0603a2950800
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Troubleshooting item |
Electric power steering (EPS) warning light/master warning light does not turn off even though engine has started. |
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Possible cause
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• EPS system malfunction.
• EPS control module detects an EPS system malfunction even though the EPS system is normal.
• CAN communication line and/or CAN signal malfunction.
• EPS warning light/master warning light circuit malfunction in the instrument cluster.
• CAN wiring harness malfunction.
• Body control module (BCM) configuration procedure was not completed properly.
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Diagnostic Procedure
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Step |
Inspection |
Results |
Action |
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1
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VERIFY EPS CONTROL MODULE DTCs
• Switch the ignition off and maintain this condition approx. 1 minute.
• Switch the ignition ON (engine on).
• Perform the DTC inspection. (See DTC INSPECTION.)
• Are any DTCs present?
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Yes
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Go to the applicable DTC inspection.
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No
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Go to the next step.
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2
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VERIFY ELECTRIC POWER STEERING WARNING LIGHT ILLUMINATION CONDITION
• Ignition is switched ON (engine off)
• Does the EPS warning light/master warning light turn off?
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Yes
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Go to the next step.
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No
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Malfunction may be temporary.
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3
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VERIFY COMMUNICATION CONDITION BETWEEN 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.)
• Is the EPAS_NETWORK PID value Node Attached and Communicate correctly?
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Yes
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Perform the body control module (BCM) configuration, then repeat the inspection from Step 1.
If the malfunction recurs, replace the instrument cluster.
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No
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EPS control module malfunction. Replace the EPS control module.
Perform the repair completion verification.
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Repair completion verification
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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?
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Yes
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Complete the symptom troubleshooting.
Explain to the customer what has been repaired.
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No
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Refer to the controller area network (CAN) malfunction diagnosis flow to inspect for a CAN communication error.
If the CAN communication is normal, perform the diagnosis from Step 1.
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