Corolla LE Sedan L4-1762cc 1.8L DOHC MFI (1998)
Control Module HVAC: Testing and Inspection
INSPECT AMPLIFIER CIRCUIT
a. Remove lower panel.
b. Disconnect the connector and inspect the connector on wire harness side, as shown in the chart.
Test conditions:
^
Ignition switch ON
^
Blower speed control switch at "HI" position
If circuit is as specified, try to replace the amplifier with a new one. If the circuit is not as specified, inspect the circuits connected to other parts.
c. Connect the connector to amplifier and inspect wire harness side connector from the back side, as shown in the chart.
Test conditions:
^
Running engine at idle speed
^
Blower speed control switch at "HI" position
^
A/C switch ON
^
Temperature control dial at "MAX. COOL" position
^
Set on manifold gauge set
If circuit is as specified, try to replace the amplifier with a new one. If the circuit is not as specified, inspect the circuits connected to other parts.
