Inspect Air Conditioning Amplifier

Air Conditioning Amplifier

(a) Remove the air conditioning amplifier with its connectors still connected.

(b) Turn the ignition switch ON.

(c) When the PTC heater operating conditions are met (engine at idling speed or faster, ambient temperature is 10°C (50°F) or less, engine coolant temperature is 65°C (149°F) or less, and No. 3 heater control knob setting is MAX HOT), turn the blower switch to the Lo setting.

(d) Wait 30 seconds.

(e) Measure the voltage. Standard voltage

Tester Connection

Specified Condition

E9-9 (PTC1) - Body ground

11 to 14 V

E9-10 (PTC2) - Body ground

11 to 14 V

E9-12 (PTC3) - Body ground

11 to 14 V

(f) Reinstall the air conditioning amplifier.

Do It Yourself Car Diagnosis

Do It Yourself Car Diagnosis

Don't pay hundreds of dollars to find out what is wrong with your car. This book is dedicated to helping the do it yourself home and independent technician understand and use OBD-II technology to diagnose and repair their own vehicles.

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    How to check air conditioner amplifier?
    1 year ago

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