Checking wiring and connectors

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.

Check the signal cable between control module terminal #A4 (#A4) and engine coolant temperature (ECT) sensor terminal #1. Check for an intermittent short-circuit to ground.

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 1: Identifying Engine Coolant Temperature (ECT) Sensor Connector Terminals

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 2: Identifying Ohmmeter

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 3: Identifying Engine Coolant Temperature Sensor

Courtesy of VOLVO CARS OF NORTH AMERICA.

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