Signal Too Low

Signal too low

Checking the status




- Ignition on.
Check whether the fault is permanent or intermittent by reading off the signal from the engine coolant temperature (ECT) sensor.
Check that the signal is within its permitted range.
The fault is permanent if the signal is incorrect. The fault is intermittent if the signal is correct.










Continue - Checking the component and wiring

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Checking the component and wiring
Check the signal cable between engine control module (ECM) terminal #A40 (#A40) and engine coolant temperature (ECT) sensor terminal #1. Check for an open-circuit. Check for a short-circuit to ground.
Check the ground lead between engine control module (ECM) terminal #A61 (#B3) and engine coolant temperature (ECT) sensor terminal #2. Check for an open-circuit.
Remedy as necessary.

Other information
- Connecting the breakout box Connecting the Breakout Box
- Signal specification Signal Description / Specification
- Engine coolant temperature (ECT) sensor, replacing Service and Repair
- Checking wiring and terminals Checking Wiring And Terminals














Continue - Verification

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Verification




Verification

Verification

Hint: After carrying out the repair, check that the fault has been remedied.








- Ignition off
- Reinstall the connectors, components etc.
- Ignition on.
Read off the signal from the engine coolant temperature (ECT) sensor.
Check that the signal is within its permitted range.









Is the signal within its permitted range?

Yes - VERIFIED

No - VERIFICATION FAILED

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VERIFICATION FAILED - Fault-tracing information

VERIFIED - Fault Found

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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 - FAULT-TRACING FAILED

No - Attempt New Test

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FAULT-TRACING FAILED - FAULT-TRACING FAILED

Attempt New Test - Checking the status

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