Checking The Connector

WARNING:

Before fault-tracing can begin, the engine cooling fan (FC) connector must be disconnected to prevent the engine cooling fan (FC) engaging. Diagnostic trouble code (DTC) ECM-6110 Engine cooling fan (FC) low-speed signal may be stored. After fault-tracing the connector must be reconnected.

Fig 1: Identifying Ignition ON

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Fig 2: Connecting Connector

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Ignition off
Check the connector on the engine coolant temperature (ECT) sensor. Check for contact resistance and oxidation
Reinstall the components, reconnect the connectors etc.
Ignition on
Read off the engine coolant temperature (ECT) sensor.
If the temperature is now within its permitted range, the fault was caused by loose connections in the connector.

Other information
- see CHECKING WIRING AND TERMINALS
- For B5xx4T, see REPLACING THE THERMOSTAT AND/OR ENGINE COOLANT TEMPERATURE SENSOR
- For B6xx4T, see ENGINE COOLANT TEMPERATURE (ECT) SENSOR, REPLACING .
Fig 3: Identifying 2-Bit Connector
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Fig 4: Identifying VCT2000 Diagnostic Tool Symbol In VIDA
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Fig 5: Identifying 2-Bit Connector Side View
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Is the temperature within its permitted range?

YES
OKAY: Troubleshooting has been completed.
NO
Refer to CHECKING THE WIRING AND COMPONENT