Fault-Tracing

Fault-tracing

Checking component and connections




- Ignition on
- Activate readout of electronic throttle unit's position.
- Check that read-off throttle position shows reasonable values at different deployments.
- Ignition off
Check engine control module ECM) and the electronic throttle unit's connector for contact resistance and oxidation.
Check if the electronic throttle unit is blocked by an object and press on the throttle disc to see if it binds.
Clean the electronic throttle unit if needed.

Other information
- Connecting the breakout box, B8444S Connecting The Breakout Box, Engine Control Module (ECM)
- Signal specification, B8444S Signal Specification, Engine Control Module (ECM)
- Throttle body, B8444S Removal and Replacement
- Throttle body, cleaning, B8444S Procedures
- Checking wiring and terminals Checking Wiring and Terminals













Continue - Verification

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Verification




Verification

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








- Ignition off
- Reinstall the connectors, components etc.
- Ignition on
Activate readout of electronic throttle unit's position.
Check that read-off throttle position shows reasonable values at different deployments.





Are these values within their permitted ranges?

Yes - Troubleshooting complete for this DTC

No - 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 - Exit Fault-Tracing

No - Attempt New Test

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Attempt New Test - Checking component and connections

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