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 to see if any other diagnostic trouble codes (DTCs) are stored. If other diagnostic trouble codes (DTCs) are stored, the engine control module (ECM) may not be able to run the adaptation.
Are any other diagnostic trouble codes (DTCs) stored?
Yes - Fault-tracing information
No - Checking the status
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Checking the status
Note! The ignition must be switched on for at least 30 seconds after the basic conditions are met in order for the adaptation to start. It takes approximately 10 seconds to run the adaptation.
- Ignition off
- Ignition on.
Read off parameters.
Check that the following basic conditions for adaptation of the throttle unit are met.
1. Ignition on / engine off
2. Battery voltage above 10 V
3. Accelerator pedal (AP) unaffected
4. The vehicle must be stationary (no vehicle speed signal).
5. Engine coolant temperature (ECT) between 5-100 °C
6. Intake air temperature (IAT) above 5 °C.
Remedy as necessary.
Check that the adaptation is correctly run after the "Adaptation of the throttle unit running" parameter changes status from "YES" to "NO". When all basic conditions are met, the adaptation must be completed after approximately 40 seconds. When the adaptation is completed correctly, the following information will be displayed:
- Adaptation of the throttle unit: OK
- Adaptation of the throttle unit running: NO.
The fault is intermittent at the moment if the adaptation has been completed correctly.
Continue - Checking connectors and components
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Checking connectors and components
- 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.
Check that the shutter in the throttle unit is not blocked or sticking. Clean as necessary.
Remedy as necessary.
Other information
- Signal specification, B5254T7 Signal Specification
- Component specifications, B5254T7 [1][2]Engine Control Module
- Throttle body, B5254T7 Removal and Replacement
- Throttle body, cleaning, B5254T7 Procedures
- Checking wiring and terminals Checking Wiring and Terminals
Continue - Verification
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Fault-tracing information
Remedy stored diagnostic trouble code(s) (DTCs).
Remedy as necessary.
Continue - DONE
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Verification
Verification
Hint: After carrying out the repair, check that the fault has been remedied.
Note! The ignition must be switched on for at least 30 seconds after the basic conditions are met in order for the adaptation to start. It takes approximately 10 seconds to run the adaptation.
- Ignition off
- Reinstall the connectors, components etc.
- Ignition on.
Read off parameters.
Check that the following basic conditions for adaptation of the throttle unit are met.
1. Ignition on / engine off
2. Battery voltage above 10 V
3. Accelerator pedal (AP) unaffected
4. The vehicle must be stationary (no vehicle speed signal).
5. Engine coolant temperature (ECT) between 5-100 °C
6. Intake air temperature (IAT) above 5 °C.
Remedy as necessary.
Check that the adaptation is correctly run after the "Adaptation of the throttle unit running" parameter changes status from "YES" to "NO". When all basic conditions are met, the adaptation must be completed after approximately 40 seconds. When the adaptation is completed correctly, the following information will be displayed:
- Adaptation of the throttle unit: OK
- Adaptation of the throttle unit running: NO.
The fault has been remedied if the adaptation has been completed correctly.
Is the adaptation OK?
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 - Exit fault-tracing
No - Attempt New Test
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Attempt New Test - Fault-tracing information
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