Control Module HVAC: Testing and Inspection

INSPECT AMPLIFIER CIRCUIT







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






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

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 A/C amplifier and inspect wire harness side connector from the back side, as shown.







Test conditions:
- Ignition switch ON
- A/C switch ON
- Temperature control dial MAX COOL
- Blower control lever HI
- 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.