Signal Too High. Permanent Fault

Signal too high. Permanent fault

Checking the terminal








- Ignition off
- Disconnect the connector for the air conditioning (A/C) pressure sensor.
Check the connector for the air conditioning (A/C) pressure sensor. Check for contact resistance and oxidation according to Checking wiring and terminals. Permanent fault Checking Wiring And Terminals. Permanent Fault.
Remedy as necessary.





Were any faults found?

Yes - Verification

No - Checking the signal cable

-------------------------------------------------

Checking the signal cable








- Air conditioning (A/C) pressure sensor connector disconnected
- Ignition on.
Connect a voltmeter between connector terminal 2 for the air conditioning (A/C) pressure sensor (control module side) and ground.









The voltmeter should read 0 V.

OK - Checking the ground lead

Not OK - Checking the signal cable

-------------------------------------------------

Checking the ground lead
Connect an ohmmeter between connector terminal 1 for the air conditioning (A/C) pressure sensor and the ground terminal.









The ohmmeter should read approximately 0 ohms.

OK - Defective air conditioning (A/C) pressure sensor

Not OK - Checking the ground lead

-------------------------------------------------

Defective air conditioning (A/C) pressure sensor
Try a new air conditioning (A/C) pressure sensor according to Replacing the air conditioning (A/C) system pressure sensor Replacing The Air Conditioning (A/C) System Pressure Sensor.

Select Continue.

Continue - Verification

-------------------------------------------------

Checking the ground lead
Check the cable between connector terminal 1 for the air conditioning (A/C) pressure sensor (control module side) and engine control module (ECM) terminal #77. Check for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring And Terminals. Permanent Fault.
Remedy as necessary.













Select Continue.

Continue - Verification

-------------------------------------------------

Checking the signal cable
Check the cable between connector terminal 2 for the air conditioning (A/C) pressure sensor (control module side) and engine control module (ECM) terminal #14. Check for a short-circuit to supply voltage according to Checking wiring and terminals. Permanent fault Checking Wiring And Terminals. Permanent Fault.
Remedy as necessary.













Select Continue.

Continue - Verification

-------------------------------------------------

Verification








- Reconnect the connectors, reinstall components etc.
- Ignition on.
Read off the parameter for the pressure in the air conditioning (A/C) system.





Is the pressure within its permitted range?

Yes - FAULT FOUND

No - No Fault FoundFault-tracing information

-------------------------------------------------

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

------------------------

FAULT-TRACING FAILED - No Fault Found

Attempt New Test - Checking the terminal

-------------------------------------------------