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STEP
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INSPECTION
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ACTION
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1
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• Perform the DTC inspection.
• Is an error message regarding the communication between the EPS control module and the WDS or equivalent displayed?
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Yes
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If a communication error message is displayed even after inspecting according to the procedures displayed on the WDS or equivalent, go to Step 4.
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No
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Go to the next step.
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2
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• Have DTCs been recorded in the memory?
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Yes
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Perform inspection using the appropriate DTC.
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No
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Go to the next step.
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3
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• 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.
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- Terminal 1L (12-pin) and terminal 2X (24-pin)
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- Terminal 1K (12-pin) and terminal 2W (24-pin)
• Is there continuity?
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Yes
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Inspect the instrument cluster. (EPS warning light circuit malfunction in the instrument cluster)
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No
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Repair the wiring harness between the EPS control module and the instrument cluster, then reinspect the malfunction symptoms.
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4
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• Disconnect the EPS control module connector.
• Inspect for continuity between the EPS control module and the DLC-2 at the following terminals.
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- Terminal 1L (12-pin) and CAN_H terminal (16-pin)
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- Terminal 1K (12-pin) and CAN_L terminal (16-pin)
• Is there continuity?
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Yes
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Go to the next step.
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No
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Repair the wiring harness between the EPS control module and the DLC-2, then repeat from Step 1 if the malfunction.
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5
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• Measure the voltage at EPS control module connector terminal 1A (12-pin, IG1 signal).
• Is the voltage within the following range?
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- IG ON: 8.5-17.5 V
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Yes
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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.
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No
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Inspect the battery. If the battery condition is normal, inspect and repair the EPS control module wiring harness (IG1 signal). Reinspect the malfunction symptoms.
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