Signal Missing

Signal missing

Checking connectors and wiring
Check the leak diagnostic unit connectors. Check for contact resistance and oxidation.
Check the signal cable between engine control module (ECM) terminal #B34 (#B44) and leak diagnostic unit terminal #2. Check for an open-circuit.
Check the power supply cable between system relay terminal #5 and leak diagnostic unit terminal #4. Check for an open-circuit. Check for a short-circuit to ground.

Hint: With the ignition on, the voltage between leak diagnostic unit connector terminal #4 and the ground terminal must be battery voltage.

If no fault is found in the above fault-tracing and the fault recurs. Try a new leak diagnostic unit.
Remedy as necessary.

Other information:
- For resistance values, see Component specifications Specifications
- To connect the breakout box, see Connecting the breakout box, B5234T9, B5244T7 Connecting The Breakout Box
- For information about signals, see Signal specification Signal Specifications
- To access or replace the leak diagnostic unit, see Leak diagnostic pump, replacing 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
In case of this defect, troubleshooting is not followed by verification.
The information can be displayed again or the fault-tracing for this fault can be interrupted.

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Yes - Attempt New Test

No - FAULT FOUND

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Attempt New Test - Checking connectors and wiring

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