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 battery terminal voltage normal?
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Yes
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Make sure that battery terminal connection is normal.
Go to next step.
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No
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Charge or replace battery, then go to Step 6.
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2
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INSPECT BATTERY GRAVITY
• Is battery specific gravity as specified?
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Yes
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Go to next step.
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No
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Replace battery, then go to Step 6.
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3
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INSPECT CHARGING SYSTEM
• Are generator and drive belt tension normal?
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Yes
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Go to next step.
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No
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Adjust drive belt tension as necessary.
Replace generator and/or drive belt as necessary.
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4
|
INSPECT DSC HU/CM POWER SUPPLY CIRCUIT FOR OPEN CIRCUIT
• Start engine.
• Measure voltage between DSC HU/CM terminal G and ground.
• Is voltage above 10 V?
|
Yes
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Go to next step.
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No
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Go to Step 6.
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5
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INSPECT DSC HU/CM GROUND CIRCUIT FOR POOR GROUND OR OPEN CIRCUIT
• Turn ignition key to OFF.
• Measure resistance between ground and DSC HU/CM terminal A.
• Is resistance within 0-1 ohm?
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Yes
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Go to next step.
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No
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If there is no continuity:
• Repair or replace harness for open circuit between DSC HU/CM and ground, then go to next step.
If resistance is not within 0-1 ohm:
• Repair or replace harness for poor ground then go to next step.
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6
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VERIFY TROUBLESHOOTING COMPLETED
• Make sure to reconnect all disconnected connectors.
• Clear DTC from memory.
(See Clearing DTCs Procedures.)
• Is same DTC present?
|
Yes
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Replace DSC HU/CM, then go to next step.
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No
|
Go to 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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