Checking 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 Switch ON Position

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Fig 2: Identifying Connector(s) Reinstallation

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Ignition off
Check the engine coolant temperature (ECT) sensor connector for contact resistance and oxidation according to Contact resistance and oxidation .
Reinstall components, reconnect 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
- To access the engine coolant temperature (ECT) sensor, see engine temperature sensor .
Fig 3: Identifying Terminal connectors
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Fig 4: Identifying VCT2000 Diagnostic Tool
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Fig 5: Identifying engine Coolant Temperature (ECT) Sensor
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Is the temperature within its permitted range?

YES
OKAY: Troubleshooting has been completed.
NO
Refer to Checking wiring and components