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.





Continue - cont

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cont - Checking the fault status

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Checking the fault status




- Ignition off
- Start the engine.
Read off the diagnostic status and the fault status for the diagnostic trouble code (DTC).
Check the fault status when the status of the diagnostic is COMPLETED.
If the fault status is "NO FAULT FOUND" when the diagnostic status is COMPLETED the fault is intermittent at the moment.






Continue - Checking the component and wiring

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Checking the component and wiring




- Ignition off
- Check the throttle unit and engine control module (ECM) connectors. Check for contact resistance and oxidation.
Check the resistance value of the damper motor winding in the throttle unit. Take readings between throttle unit terminals #1 and #4 (component side). Check for an open-circuit. Check for a short-circuit.

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

Check damper motor (+) and (-) cables. Check for an open-circuit. Check for a short-circuit to ground or supply voltage.
Check between:
- Engine control module (ECM) terminal #A74 (#B14) and throttle unit terminal #4 (cable harness side)
- Engine control module (ECM) terminal #A75 (#B15) and throttle unit terminal #1 (cable harness side).
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.
Remedy as necessary.

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














Continue - Adaptation of the throttle unit

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Adaptation of the throttle unit

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 car 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.









Then select Continue when the adaptation has been completed correctly.

Continue - Verification

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Verification








- Ignition off
- Reinstall the connectors, components etc.
- Start the engine
- Read off the diagnostic status and the fault status for diagnostic trouble code (DTC) ECM-919A.
Check that the fault status is "NO FAULT FOUND" when the diagnostic status is COMPLETED. If the fault status is "FAULT FOUND" when the diagnostic status is COMPLETED there is a fault.





Is the fault status "NO FAULT FOUND" when the status of the diagnostic is completed?

Yes - Fault Found

No - Programming the engine control module (ECM)

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Programming the engine control module (ECM)

Hint: This diagnostic trouble code (DTC) may be caused by faulty software.




- Ignition off.
Try downloading new software to the engine control module (ECM). To download new software, see: Engine control module (ECM) Engine Control Module (ECM)
Remedy as necessary.


Continue - Adaptation of the throttle unit

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Adaptation of the throttle unit

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 car 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.









Then select Continue when the adaptation has been completed correctly.

Continue - Verification

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Verification




Verification

Verification

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








- Ignition off
- Reinstall the connectors, components etc.
- Start the engine.
Read off the diagnostic status and the fault status for the diagnostic trouble code (DTC).
Check that the fault status is "NO FAULT FOUND" when the diagnostic status is COMPLETED. If the fault status is "FAULT FOUND" when the diagnostic status is COMPLETED there is a fault.
Remedy as necessary.





Is the fault status is "NO FAULT FOUND"?

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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