FREE REPAIR MANUALS & LABOR GUIDES 1982-2013 Vehicles
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Signal Missing






Signal missing

Checking the connector








- Ignition off
- Check the engine control module (ECM) connectors and terminals. Check for contact resistance and oxidation
- Check the VGLA control module connectors and terminals. Check for contact resistance and oxidation.

Note! Visually check the connectors and terminals.

- Reinstall the components, reconnect the connectors etc.
- Try starting the car and check that the function is OK.
If the function is OK the cause of the fault was contact resistance or oxidation in the connector.

Other information
- To access or replace the VGLA control module, see Replacing the control module Replacing the Control Module
- Checking wiring and terminals Checking Wiring and Terminals.

Is the function OK?

Yes - Fault has been remedied

No - Checking components and wiring

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Checking components and wiring
Check the signal cable between engine control module (ECM) terminal #A12 and VGLA control module terminal #B22. Check for an open-circuit.
Remedy as necessary.

Other information:
- To connect the breakout box / access the control module, see Connecting the breakout box, B5234T9, B5244T7 Connecting The Breakout Box
- To access or replace the VGLA control module, see Replacing the control module Replacing the Control Module
- For information about signals, see Signal specification Signal Specifications
- 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
- Check that the engine cannot be started when the clutch pedal is unaffected
- Check that the engine can be started with the clutch pedal pressed down.
The fault has been remedied if the function is OK.

Is function OK?

Yes - VERIFIED

No - VERIFICATION FAILED

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VERIFICATION FAILED - Fault-tracing information

VERIFIED - FAULT FOUND

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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 the connector

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