Diagnostic procedure
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STEP
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INSPECTION
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ACTION
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|---|---|---|---|
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1
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INSPECT BATTERY VOLTAGE
• Is the battery terminal voltage normal?
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Yes
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Make sure that battery terminal connection is okay.
Go to the next step.
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No
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Charge or replace the battery, then go to Step 6.
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2
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INSPECT BATTERY GRAVITY
• Is the battery specific gravity as specified?
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Yes
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Go to the next step.
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No
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Replace the battery, then go to Step 6.
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3
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INSPECT CHARGING SYSTEM
• Are the generator and drive belt tension normal?
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Yes
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Go to the next step.
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No
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Replace the generator and/or drive belt if necessary.
Go to step 6.
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4
|
INSPECT EHPAS CM POWER SUPPLY CIRCUIT FOR OPEN OR SHORT CIRCUIT
• Start the engine.
• Measure the voltage between following EHPAS control module terminal (wiring harness-side) and ground.
• Is the voltage 10 V or more?
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Yes
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Go to the next Step.
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No
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Repair or replace the wiring harness for open circuit between the EHPAS control module and ground, then go to Step 6.
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5
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INSPECT EHPAS CONTROL MODULE GROUND CIRCUIT FOR POOR GROUND OR OPEN CIRCUIT
• Turn the ignition switch off.
• Measure the resistance between the following EHPAS control module terminal (wiring harness-side) and ground.
• Is the resistance within 0-1 ohm?
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Yes
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Go to the next step.
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No
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If there is no continuity:
• Repair or replace the wiring harness for open circuit between the EHPAS control module and ground, then go to the next step.
If the resistance is not within 0-1 ohm:
• Repair or replace the wiring harness for poor ground, then go to the next step.
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6
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VERIFY THAT THE SAME DTC IS NOT PRESENT
• Make sure to reconnect all disconnected connectors.
• Clear the DTC from the memory.
(See Clearing DTCs Procedure.)
• Is the same DTC present?
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Yes
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Replace the electric power steering oil pump, then go to the next step.
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No
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Go to the next step.
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7
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VERIFY THAT NO OTHER DTCS ARE PRESENT
• Are any other DTCs output?
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Yes
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Go to the applicable DTC inspection.
(See DTC Table.)
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No
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DTC troubleshooting completed.
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