Checking the wiring

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-6120 Engine cooling fan (FC) control module may be stored. After fault-tracing the connector must be reconnected.

NOTE:

This diagnostic trouble code (DTC) is stored if the engine coolant temperature (ECT) sensor freezes. This may happen if the coolant level is low or there is too little glycol in the coolant. Check the engine coolant level and its freezing point. Remedy as necessary.

Fig 1: Identifying Ignition ON

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Fig 2: Connecting Connector

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Ignition off
Check the ground lead between control module terminal #A60 (#A60) and engine coolant temperature (ECT) sensor terminal #2. Check for an open-circuit
Reinstall the components, reconnect the connectors etc.
Other information
- To connect the breakout box / access the control module, see Connecting the breakout box
- To access the engine coolant temperature (ECT) sensor, see Temperature sensor engine coolant, replacing
- For resistance values, see Component specifications
- For information about signals:
  - For 6 cylinder engines -2001, see Signal specification
  - For 6 cylinder engines 2002-, see Signal specification
  - For 6 cylinder engines -2004, see Signal specification
  - For 6 cylinder engines 2005-, see Signal specification .
- See Contents .
Fig 3: Identifying Engine Coolant Temperature (ECT) Sensor Connector Terminals
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Fig 4: Identifying Ohmmeter
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Fig 5: Identifying Engine Coolant Temperature Sensor
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Were any faults found in the ground cable?

YES
Refer to Verification
NO
Refer to Checking the engine coolant temperature (ECT)