Faulty Signal. Permanent Fault

Faulty signal. Permanent fault

Checking wiring and connectors




- Ignition off
- Check the intake air temperature (IAT) sensor and engine control module (ECM) connectors for contact resistance and oxidation according to Checking wiring and terminals. Permanent fault Checking Wiring And Terminals. Permanent Fault
- Check the signal cable between engine control module (ECM) terminal # 48 and intake air temperature (IAT) sensor terminal #1. Check for a short-circuit to ground according to Checking wiring and terminals. Permanent fault Checking Wiring And Terminals. Permanent Fault
- Check the ground lead between intake air temperature (IAT) sensor terminal # 2 and engine control module (ECM) terminal # 79. Check for an intermittent open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring And Terminals. Permanent Fault
- Check the signal cable between intake air temperature (IAT) sensor terminal #1 and engine control module (ECM) terminal #48. Check the ground lead between intake air temperature (IAT) sensor terminal #2 and engine control module (ECM) terminal # 79. Check these cables for an intermittent short-circuit to supply voltage according to Checking wiring and terminals. Permanent fault Checking Wiring And Terminals. Permanent Fault
- Remedy as necessary
- Try a new intake air temperature (IAT) sensor if no fault is found during the above fault-tracing.

Other information
- To connect the breakout box, see Connecting the breakout box. EMS 2000 Connecting The Breakout Box. EMS 2000
- For information about signals see Signal specification EMS2000.













Select Continue when the fault has been remedied.

Continue - Fault-tracing information

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Fault-tracing information




Information

Fault-tracing information
In case of this defect, troubleshooting is not followed by verification.
The information can be displayed again or the fault-tracing for this fault can be interrupted.

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FAULT FOUND - FAULT FOUND

Attempt New Test - Checking wiring and connectors

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