ON-VEHICLE INSPECTION
PROCEDURE
1. INSPECT REFRIGERANT PRESSURE WITH MANIFOLD GAUGE SET
HINT:
This is a method where a manifold gauge set is used to help locate the problem.
(a) Read the manifold gauge pressure when the following conditions are met:
Test conditions:
(1) Normally functioning refrigeration system Gauge Reading
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(2) Moisture is present in the refrigeration system.
Symptom |
Probable Cause |
Diagnosis |
Corrective Action |
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During operation, pressure on low pressure side cycles between normal and vacuum |
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(3) Insufficient cooling
Symptom |
Probable Cause |
Diagnosis |
Corrective Action |
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Gas leaks from the refrigeration system |
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(4) Poor circulation of refrigerant
Symptom |
Probable Cause |
Diagnosis |
Corrective Action |
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Refrigerant flow is obstructed by dirt inside the pipes of the condenser core |
Receiver is clogged |
Replace condenser |
(5) Refrigerant does not circulate.
Symptom |
Probable Cause |
Diagnosis |
Corrective Action |
---|---|---|---|
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Refrigerant does not circulate |
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(6) Refrigerant is overcharged or cooling effectiveness of condenser is insufficient.
Symptom |
Probable Cause |
Diagnosis |
Corrective Action |
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(7) Air is present in the refrigeration system.
Symptom |
Probable Cause |
Diagnosis |
Corrective Action |
---|---|---|---|
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Air in system |
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(8) Expansion valve malfunction
Symptom |
Probable Cause |
Diagnosis |
Corrective Action |
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Expansion valve may be stuck |
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Check expansion valve |
(9) Insufficient compressor compression
Symptom |
Probable Cause |
Diagnosis |
Corrective Action |
---|---|---|---|
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Internal leak in compressor |
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Replace compressor |
Gauge readings (Reference)
Reassembly
REASSEMBLY
PROCEDURE
1. INSTALL COOLER DRYER
(a) Using pliers, install a new cooler dryer to the modulator.
(b) Apply sufficient compressor oil to the O-ring and fitting surfaces
of t ...
Disassembly
DISASSEMBLY
PROCEDURE
1. REMOVE TRANSFER AND TRANSAXLE SETTING STUD BOLT
(a) Remove the 4 transfer and transaxle setting stud bolts.
2. REMOVE NO. 2 TRANSFER CASE PLUG
(a) Remove the No. ...
Rear Right Sensor Malfunction (C1AE9)
DESCRIPTION
The No. 1 ultrasonic sensor (rear right sensor) is installed on the rear bumper.
The ECU detects obstacles based on signals received from the No. 1 ultrasonic sensor
(rear right sensor). If the No. 1 ultrasonic sensor (rear right sensor) has a ...