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- Check battery (Refer to GROUP 54A - Battery - On-vehicle Service - Battery test
).
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Q.
Is the check result normal?
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(1)Disconnect the connector, and measure at the wiring harness side.
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(2)Check the voltage between the engine-ECU connector (BACK terminal) and body earth. OK: System voltage
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Q.
Is the check result normal?
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![](../../../buttons/03btn002.png)
Repair BACK line between battery and engine-ECU connector.
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Q.
Is the check result normal?
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Repair the connector(s) or wiring harness.
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Q.
Does the trouble symptom persist?
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Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions).
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