Signal Too Low

Signal too low

Checking the component and wiring
Check the resistance of the pump motor between the leak diagnostic unit connector terminals #1 and #4 (leak diagnostic pump side).
Check the signal cable between engine control module (ECM) terminal #B33 (#C33) and leak diagnostic unit terminal #1. Check for a short-circuit to ground.
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 Connecting The Breakout Box, Engine Control Module (ECM)
- Signal specification Signal Specification, Engine Control Module (ECM)
- Component specifications [1][2]Electrical Specifications
- Leak diagnostic pump Service and Repair Leak diagnostic pump Service and Repair
- Checking wiring and terminals Checking Wiring and Terminals










Continue - Fault-tracing information

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Fault-tracing information




Information

Fault-tracing information
Fault-tracing is not followed by verification for this fault.

Hint: After the diagnostic trouble codes (DTCs) are erased, the function of the leak diagnostic unit can be checked by running a quick test of the fuel tank system in the vehicle communication socket. If there is a fault, the fault status will be "FAULT FOUND" on the leak diagnostic unit.

The information can be displayed again or fault-tracing 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 - Checking the component and wiring

Fault Found - DONE

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