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- Item 6: Engine coolant temperature sensor
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OK:
Engine cold state: At ambient temperature (atmospheric temperature) or equivalent. Engine hot state: At 80 - 120°C
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Q.
Is the check result normal?
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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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- Engine coolant temperature sensor connector check.
- Engine coolant temperature sensor check (Refer to ).
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Q.
Is the check result normal?
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Repair or replace the connector, or replace the engine coolant temperature sensor.
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- Use special tool test harness (MB991709) to connect connector, and measure at pick-up harness.
- Ignition switch: "ON"
- Voltage between terminal engine-ECU WTS line and body earth.
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OK:
Engine coolant temperature at -20°C: 3.9 - 4.5 V Engine coolant temperature at 0°C: 3.2 - 3.8 V Engine coolant temperature at 20°C: 2.3 - 2.9 V Engine coolant temperature at 40°C: 1.3 - 1.9 V Engine coolant temperature at 60°C: 0.7 - 1.3 V Engine coolant temperature at 80°C: 0.3 - 0.9 V
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Q.
Is the check result normal?
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- Check power line for damage.
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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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- Check earthing line for damage.
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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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- Item 6: Engine coolant temperature sensor
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OK:
Engine cold state: At ambient temperature (atmospheric temperature) or equivalent. Engine hot state: At 80 - 120 °C
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Q.
Is the check result normal?
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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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