Control Module HVAC: Testing and Inspection
1. REMOVE COMBINATION METER2. REMOVE ECM
3. INSPECT A/C AMPLIFIER CIRCUIT
a. Disconnect the connector from the combination mater and inspect the connector on the wire harness side, as shown in the chart below.
Test condition:
Turn ignition switch to 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.
b. Connect the connector to combination mater and inspect wire harness side from the back side, as shown in the chart below.
Test condition:
- Run engine at idle speed
- Set on 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.
c. Inspect the wire harness side connector of ECM from the back side, as shown in the chart below.
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.