Signal Too Low

Signal too low

Checking the status




- Ignition on.
Activate the valve in the leak diagnostic unit to check whether the fault is permanent or intermittent.
The valve clicks when it is activated.
The fault is permanent if the valve does not activate.
The fault is intermittent if the valve activates.






Continue - Checking components and wiring

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Checking components and wiring
Check the resistance of the valve between the leak diagnostic unit connector terminals #3 and #4 (leak diagnostic pump side).
Check the signal cable between engine control module (ECM) terminal #B40 (#B50) and leak diagnostic unit terminal #3. Check for a short-circuit to supply voltage.
Try a new leak diagnostic unit if no fault is found during the above fault-tracing.
Remedy as necessary.

Other information:
- Connecting the breakout box, B5244T5, B5254T2 Connecting the Breakout Box
- For information about signals for 5 cylinder engines: Signal specification Signal Description / Specification
- For information about signals for 6 cylinder engines: Signal specification Signal Description / Specification
- For resistance values: Component specifications Specifications
- Leak diagnostic pump, replacing Service and Repair
- Checking wiring and terminals Checking Wiring And Terminals










Continue - Verification

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Verification




Verification

Verification

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




- Ignition on
- Activate the valve in the leak diagnostic unit.
The valve should click.
Check that the function is OK.









Is the function 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 - FAULT-TRACING FAILED

No - Attempt New Test

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FAULT-TRACING FAILED - FAULT-TRACING FAILED

Attempt New Test - Checking the status

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