Control Module HVAC: Testing and Inspection

ON-VEHICLE INSPECTION





Inspect A/C Amplifier Circuit





1. Disconnect the connector from the amplifier and inspect connector on wire harness side, as shown in the chart.

Test conditions:
- Ignition switch ON
- Temperature control lever to MAX COOL
- Blower switch ON

If circuit is as specified, try replacing the amplifier with a new one. If the circuit is not as specified, inspect the circuits connected to other parts.








2. Connect the connector to amplifier and inspect the wire harness side connector from the back side, as shown in the chart.

Test conditions:
- Ignition switch ON
- Temperature control lever to MAX COOL
- Blower switch HI
- A/C switch ON
- Install manifold gauge set

If circuit is as specified, try replacing the amplifier with a new one. If the circuit is not as specified, inspect the circuits connected to other parts.