Checking wiring and connectors
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 open-circuit. Check for an intermittent short-circuit to supply voltage.
HINT: With the ignition on and engine coolant temperature (ECT) sensor connector disconnected the voltage between terminal #1 and ground terminal should be approximately 5 V.
Check the ground lead between control module terminal #A60 (#A60) and engine coolant temperature (ECT) sensor terminal #2. Check for an intermittent open-circuit.
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 the 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 .
- Continue
Refer to Information