Sigma V6-2972cc 3.0L SOHC (1989)
A/C Signal: Testing and Inspection
System Schematic
To test the Air Conditioning Signal to the ECU, disconnect the ECU connector and locate pins 7 and 65 on the ECU connector and test for the presence
of power with the A/C switch in the "on" position and the ignition on. System voltage should be available with the switch in the "on" position and 0 volts
should be present in the "off" position. If there is no power at the ECU, the air conditioning circuits should be checked. Refer to HEATING,
VENTILATION AND AIR CONDITIONING.
