Checking the wiring and component
Check the resistance of the engine coolant temperature (ECT) sensor. For the resistance values, see Engine coolant temperature (ECT) sensor .
Check the signal cable between control module connector terminal #A40 (#A40) and engine coolant temperature (ECT) sensor terminal 1. Check for an short-circuit to ground. Check for an open-circuit.
Check the ground lead between control module connector terminal #A61 (#B3) and engine coolant temperature (ECT) sensor connector terminal 2. Check for an open-circuit.
Remedy as necessary.
Other information
- To connect the breakout box, see Connecting the breakout box
- To access or replace the engine coolant temperature (ECT) sensor, see Engine coolant temperature (ECT) sensor, replacing
- For information about signals see Signal specification
- See Checking wiring and terminals .
- Continue
Refer to Signal too low, intermittent fault