9000 CSE L4-2290cc 2.3L DOHC Turbo EFI (1995)
A/C not working and the fault points to the circuit in the Electronic Display Unit (EDU).
Action
1
Connect the Intelligent Saab Tester (ISAT) and read "COOLANT TEMPERATURE" under "READ VALUES". The temperature should be below
118° C (244° F) (4 cyl), 115° C (239° F) (6 cyl). If the engine temperature exceeds these values, the EDU automatically disconnects the A/C
compressor.
If the temperature is under the specified values, go to point 2.
2
Go into the ISAT menu "AC" under "ACTIVATE". Activate the A/C and measure the voltage on pin 2 of pressure switch 166. This should be
battery positive voltage.
If there is voltage, go to point 4.
If not, check the cable assembly between pin 2 on the pressure switch and pin 4 on the control module.
3
If the fault remains, proceed to "Action Before Changing A Control Module".
4
Check that there is voltage to pin 10 on the control module when the Automatic Climate Control/A/C switch is in the ON position.
If not, the fault is in the cable assembly to these components.
Check Engine