Heating & A/C System: 75

75-AC REQUEST OUTPUT SIGNAL HIGH WHEN DRIVEN LOW

For a complete wiring diagram, refer to the Wiring Information.

- When Monitored:
With the ignition on.

- Set Condition:
If the A/C Heater Control detects voltage above 4.49 volts on the (C221) A/C Switch Sense circuit with the A/C switched on.

NOTE: This DTC must be active for the results of this test to be valid. Do not perform this test if this DTC is stored. HVAC System Test (MTC) for stored DTC test procedures. Testing and Inspection

Perform 73-AC REQUEST OUTPUT SIGNAL TOO HIGH diagnostic test procedure. 73