A/C Compressor Regulator Valve -N280-, Checking Activation

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NOTE:

Perform an electrical test for the activation of the A/C Compressor Regulator Valve -N280- as it is described in the A/C system Guided Fault Finding using the Vehicle Diagnostic Tester in the "Guided Fault Finding" function.

The activation of the A/C Compressor Regulator Valve -N280- occurs via the Vehicle Electrical System Control Module -J519-. Refer to Wiring Diagram. The request to activate the A/C Compressor Regulator Valve -N280- and the necessary current to regulate the compressor output to reach the desired temperature at the evaporator. Sent via the Data Bus from the Climatronic Control Module -J255- A/C display and control head to the Vehicle Electrical System Control Module -J519-. The Vehicle Electrical System Control Module -J519- then controls the A/C Compressor Regulator Valve -N280-.

If a fault in the A/C Compressor Regulator Valve -N280- is detected, then it will be stored in the DTC memory for the Vehicle Electrical System Control Module -J519- and the Climatronic Control Module -J255- A/C display and control head. It will be necessary to the check the Vehicle Electrical System Control Module -J519- DTC memory when reading the DTC memory for the Climatronic Control Module -J255- A/C display and control head using the Vehicle Diagnostic Tester in the "Guided Fault Finding" function.

The activation of the A/C Compressor Regulator Valve -N280- is displayed in the Vehicle Electrical System Control Module -J519- measured values block using the Vehicle Diagnostic Tester in the "Guided Fault Finding" function.