Signal Too High. Permanent Fault

Signal too high. Permanent fault

Checking the connectors








- Ignition off
- Check the idle air control (IAC) valve and throttle position (TP) sensor connectors. Check for contact resistance and oxidation according to Checking wiring and terminals. Permanent fault Checking Wiring And Terminals. Permanent Fault. Check for damage carefully.





Select Continue

Continue - Checking components

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Checking components




- Ignition off
- Reinstall the connectors
- Start the engine.
Click on the VCT2000 symbol to read off the value for the throttle angle.
Open the throttle slightly and check that the throttle angle signal increases with increased throttle angle.

Note! In particular, check the signal in the area before closed position. (Close to idling speed).

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.









Is the throttle position (TP) sensor signal correct?

Yes - Checking for air leakage

No - Checking the component

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Checking the component
Check the throttle body (TB) for play between the throttle spindle and the throttle position (TP) sensor.
Remedy as necessary.
Try a new throttle position (TP) sensor if no fault is found during the above fault-tracing.

Other information:
- To check and replace the throttle position (TP) sensor, see Replacing throttle position (TP) sensor Service and Repair.





Select "Continue" when the fault has been remedied.

Continue - Verification

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Checking for air leakage
- Check the intake system for air leakage according to intake system/leak test Intake System/Leak Test
- Replace the idle air control (IAC) valve if no air leakage is found in the above fault-tracing. See Replacing the idle air control (IAC) valve Service and Repair.





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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