Signal Too High
Signal too high
Checking the wiring and component
Warning! Before fault-tracing can begin, the engine cooling fan (FC) connector must be disconnected to prevent the engine cooling fan (FC) engaging. A diagnostic trouble code (DTC) for engine cooling fan (FC) low-speed may be stored. After fault-tracing the connector must be reconnected.
- Ignition off.
Check the resistance of the engine coolant temperature (ECT) sensor. Take readings between terminals #1 and #2 on the component.
Check the signal cable between engine control module (ECM) terminal #A4 (#A4) and engine coolant temperature (ECT) sensor terminal #1. Check for a short-circuit to ground.
If no faults are found and the fault is permanent, replace the engine coolant temperature (ECT) sensor.
Remedy as necessary.
Other information
- Connecting the breakout box Connecting the Breakout Box
- Signal specification Signal Specification
- Component specifications Specifications
- Temperature sensor engine coolant, replacing Service and Repair
- Checking wiring and terminals Checking Wiring and Terminals
Continue - Verification
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Verification
Verification
Hint: After carrying out the repair, check that the fault has been remedied.
- Ignition off
- Reconnect the connectors, reinstall components etc.
- Ignition on
- Read off the engine coolant temperature (ECT) sensor.
Is the temperature within its permitted range?
Yes - Troubleshooting procedure complete
No - Fault-tracing information
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Fault-tracing information
Information
Fault-tracing information
The fault should have been detected and remedied. As this is not the case fault-tracing has failed.
Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.
Do you want to exit fault-tracing?
Yes - Exit Fault-tracing
No - Attempt New Test
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Attempt New Test - Checking the wiring and component
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