Signal Missing

Signal missing

Checking the component and wiring
Check the connector for the air conditioning (A/C) pressure sensor. Check for contact resistance and oxidation.
Check the signal cable between engine control module (ECM) terminal #B51 (#C51) and air conditioning (A/C) pressure sensor terminal #2. Check for an open-circuit.
Remedy as necessary.

Other information
- Connecting the breakout box, B5254T7 Connecting the Breakout Box, Engine Control Module (ECM)
- Signal specification, B5254T7 Signal Specification
- Location of components, engine compartment, B5254T7 Locations
- 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.
- Start the engine
- Read off the air conditioning (A/C) pressure
- A/C on
- Blower fan on.
Check that the pressure increases in the air conditioning (A/C) system when the air conditioning (A/C) compressor engages. Also check that cold air blows out of the blower when at the coolest setting.





Is the 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 component and wiring

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