Compressor temperature

Fig 1: Temperature Versus Resistance Graph

Courtesy of PORSCHE OF NORTH AMERICA, INC.

DIAGNOSIS/TROUBLESHOOTING PROCEDURE

Work instruction			Display OK	If not OK
1	Check compressor temperature sensor	Switch off ignition. Pull plug B off level control module. Measure resistance on level control module plug B between 'pins 85 and 93'.	12.2 - 13.72 Ω at 20°C or see 'COMPRESSOR TEMPERATURE ' diagram Go to Step 2	Replace level control system compressor. → End
2	Check wiring between level control system compressor and level control module for short circuit to ground	Switch off ignition. Measure resistance between level control module plug B 'pins 85, 93' and ground.	∞ Ω Go to Step 3	Repair or replace wiring harness. → End
3	Check wiring between level control system compressor and level control module for short circuit with respect to each other	Measure resistance on level control module plug B between 'pin 85' and 'pin 93'.	∞ Ω Go to Step 4	Repair or replace wiring harness. → End
4	Replace level control module		→ End