Checking the wiring and component: Notes
Check the resistance of the engine coolant temperature (ECT) sensor.
The engine coolant temperature (ECT) sensor may be defective as a result of the signal cable having been short-circuited to supply voltage. Check this before replacing the sensor.
Check the signal cable between control module terminal #A4 (#A4) and engine coolant temperature (ECT) sensor terminal #1. Check for an open-circuit. Check for a 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 must 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 open-circuit.
Remedy as necessary.
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 .
- Continue
Refer to Verification