Camry L4-1995cc 2.0L SOHC (2S-E) (1984)
Control Module HVAC: Testing and Inspection
A/C Amplifier Inspection
ENGINE SPEED DETECTING CIRCUIT (2S-E ENGINE)
1.
Run engine with A/C operating. Check that compressor clutch disengages at:
Cut-Off rpm: 600 - 700 rpm
2.
If cut-off rpm is too high, turn amplifier adjust knob clockwise to adjust.
3.
If cut-off rpm is too low, turn amplifier adjust knob counter clockwise to adjust.
TEMPERATURE DETECTING CIRCUIT
1.
Remove glove box with undercover.
2.
Unplug thermistor and connect a variable resistor.
3.
Run engine with A/C set for maximum cooling:
a. Air Intake Control: "RECIRC"
b. Air Flow Control: "VENT"
c. Temperature Control: "COOL"
d. Blower Control: "HI"
4.
Measure resistance of variable resistor when compressor clutch engages and disengages. If resistance is not between two lines shown on image
chart, adjust amplifier:
a. If resistance is too high, turn temperature adjusting screw clockwise.
b. If resistance is too low or evaporator is frosted, turn screw counter clockwise until clutch engages at the specified resistance.