Faulty Signal

Faulty signal

Fault-tracing information




Fault-tracing information

Fault-tracing information

Caution! The male and female pins on the electronic throttle unit connectors are gold plated. Great care must be taken when measuring. Damage to the gold plating can result in operating difficulties.






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Continue - Checking the diagnostic trouble codes (DTCs)

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Checking the diagnostic trouble codes (DTCs)




- Ignition on
- Read off diagnostic trouble codes (DTCs).
Check if any diagnostic trouble codes (DTCs) are stored for the electronic throttle unit, throttle position (TP) sensor or engine control module (ECM).
If any of these diagnostic trouble codes (DTCs) are stored, these must be remedied first.





Are any of the above diagnostic trouble codes (DTCs) stored?

Yes - Fault-tracing information

No - Checking components and wiring

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Checking components and wiring




- Ignition off.
Check the throttle unit and engine control module (ECM) connectors. Check for contact resistance and oxidation.
Check the resistance values of the potentiometers in the throttle unit and damper motor winding.

Note! The resistance of the motor winding in the damper motor is very low.

Replace the throttle unit if necessary.
Check the damper motor (+) and (-) cables. Check for an open-circuit. Check for a short-circuit to ground. Check for a short-circuit to supply voltage.
Check between:
- Engine control module (ECM) terminal #A74 (#B14) and throttle unit terminal #4
- Engine control module (ECM) terminal #A75 (#B15) and throttle unit terminal #1.
Also check the damper motor cables (+) and (-). Check for a short-circuit to each other.
Check that the shutter in the throttle unit is not blocked or sticking. Clean as necessary.
The throttle unit is damaged if the diagnostic trouble code (DTC) recurs.

Note! If the throttle unit is replaced it must be adapted. See VIDA vehicle communication (Throttle unit adaptation).

Other information
- Connecting the breakout box, B5254T7 Connecting the Breakout Box, Engine Control Module (ECM)
- Signal specification, B5254T7 Signal Specification
- Component specifications, B5254T7 [1][2]Engine Control Module
- Throttle body, cleaning, B5254T7 Procedures
- Throttle body, B5254T7 Removal and Replacement
- Checking wiring and terminals Checking Wiring and Terminals









Continue - Fault-tracing information

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Fault-tracing information
Remedy stored diagnostic trouble code(s) (DTCs).
Remedy as necessary.

Continue - DONE

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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.

Do you want to view the information again?

Yes - Attempt New Test

No - FAULT FOUND

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Attempt New Test - Fault-tracing information

FAULT FOUND - DONE

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