Faulty Signal. Intermittent Fault

Faulty signal. Intermittent fault

Checking wiring and connectors




- Ignition off
- Check the intake air temperature (IAT) sensor and engine control module (ECM) connectors for loose connections according to Checking wiring and terminals. Intermittent faults Checking Wiring And Terminals. Intermittent Faults and contact resistance and oxidation according to Checking wiring and terminals. Intermittent faults Checking Wiring And Terminals. Intermittent Faults
- Check the signal cable between engine control module (ECM) terminal 48 and intake air temperature (IAT) sensor terminal 1 for a short-circuit to ground according to Checking wiring and terminals. Intermittent faults Checking Wiring And Terminals. Intermittent Faults
- Check the ground lead between intake air temperature (IAT) sensor terminal 2 and engine control module (ECM) terminal 79 for an intermittent open-circuit according to Checking wiring and terminals. Intermittent faults Checking Wiring And Terminals. Intermittent Faults
- Check the signal cable between intake air temperature (IAT) sensor terminal 1 and engine control module (ECM) terminal 48. Check the cable 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. Intermittent faults Checking Wiring And Terminals. Intermittent Faults
- 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
If the fault is intermittent, do not verify fault-tracing if the fault does not recur.
It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).

Do you want to view the information again?

Yes - Attempt New Test

No - FAULT FOUND

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Attempt New Test - Checking wiring and connectors

FAULT FOUND - DONE

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