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 okay?
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Yes
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Make sure that battery terminal connection is okay.
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
|
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 okay?
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Yes
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Go to next step.
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No
|
Adjust drive belt tension as necessary.
Replace generator and/or drive belt as necessary.
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4
|
INSPECT ABS (ABS/TCS) HU/CM POWER SUPPLY CIRCUIT FOR OPEN CIRCUIT
• Start engine.
• Measure voltage between ABS (ABS/TCS) HU/CM terminal Z and ground.
• Is voltage above 10 V?
|
Yes
|
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 ABS (ABS/TCS) HU/CM GROUND CIRCUIT FOR POOR GROUND OR OPEN CIRCUIT
• Turn ignition key to OFF.
• Measure resistance between ground and ABS (ABS/TCS) HU/CM terminal AC.
• Is resistance within 0-1 ohm?
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Yes
|
Go to next step.
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No
|
If there is no continuity:
• Repair or replace harness for open circuit between ABS (ABS/TCS) 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
|
VERIFY TROUBLESHOOTING COMPLETED
• Make sure to reconnect all disconnected connectors.
• Clear DTC from memory.
(See Clearing DTCs Procedures)
• Is same DTC present?
|
Yes
|
Replace ABS (ABS/TCS) 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 AFTER REPAIR PROCEDURE
• Is there any other DTC present?
|
Yes
|
Go to applicable DTC inspection.
|
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No
|
Troubleshooting completed.
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