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- Disconnect connector, and measure at the harness side.
- Ignition switch: ON
- Voltage between terminal engine-ECU OPSW line and body earth.
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Q.
Is the check result normal?
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- Check output line for open/short circuit.
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Q.
Is the check result normal?
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Repair or replace the connector, or repair the damaged harness wire.
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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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- Disconnect engine-ECU connector, and connect special tool power plant ECU
check harness (MB992291) to measure at connector for inspection.
- Engine: Idling
- Voltage between terminal OPSW and body earth.
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OK:
1 V or less (ignition switch: ON) System voltage (during idling)
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Q.
Is the check result normal?
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- Check output line for damage.
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Q.
Is the check result normal?
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Replace the engine oil pressure switch.
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Repair or replace the connector, or repair the damaged harness wire.
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