Signal Too Low. Permanent Fault

Signal too low. Permanent fault

Checking the connectors








- Ignition off
- Check the idle air control (IAC) valve and throttle position (TP) sensor connectors for contact resistance and oxidation according to Checking wiring and terminals. Permanent fault Checking Wiring And Terminals. Permanent Fault. Check for damage carefully
- Remove the idle air control (IAC) valve according to Replacing the idle air control (IAC) valve Service and Repair. Check if the hoses and ducts for the idling system and throttle angle are blocked
- Try a new idle air control (IAC) valve 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 - Verification

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Verification




Verification

Verification

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




- Reinstall the components, reconnect the connectors etc.
- Start the engine and run it to normal operating temperature. Let the engine idle.




- Read off the engine speed (RPM) by clicking the symbol for VCT-2000
- Check that the idling speed is be approximately 750 rpm





Is the idling speed correct?

Yes - VERIFIED

No - VERIFICATION FAILED

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VERIFIED - FAULT FOUND

VERIFICATION FAILED - 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 - FAULT-TRACING FAILED

No - Attempt New Test

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Attempt New Test - Checking the connectors

FAULT-TRACING FAILED - No Fault Found

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