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Q.
Was the battery terminal removed just before reading the diagnosis code?
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- Temporarily place the ignition switch in "LOCK" (OFF) position, and 10 seconds after that, place it in "ON" position again.
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Q.
Is diagnosis code of P1603 stored?
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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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Repair or replace the connector(s), or check and repair the harness of short to earth and open circuit in 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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- Reconfirmation of diagnosis code.
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Q.
Is diagnosis code stored?
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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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