ON-VEHICLE INSPECTION
PROCEDURE
1. INSPECT REFRIGERANT PRESSURE
(a) This method uses a refrigerant recovery unit set to locate problem areas. Read the refrigerant pressure when the test conditions are established.
Test conditions:
Gauge readings (Reference):
*a |
Pressure on low-pressure side |
*b |
Blower HI Zone |
*c |
Blower LO Zone |
*d |
Pressure on high-pressure side |
(1) Normally functioning refrigeration system. Gauge Reading:
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(2) The A/C system periodically changes between normal and improper function due to moisture in the refrigerant system.
*a |
Low Pressure Side |
*b |
High Pressure Side |
Symptom |
Probable Cause |
Diagnosis |
Corrective Action |
---|---|---|---|
During operation, pressure on low pressure side cycles between normal and vacuum |
Moisture in refrigeration system freezes at expansion valve orifice, causing temporary stop of cycle. However, when melted, normal state is restored. |
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(3) The A/C system does not function effectively due to insufficient refrigerant.
*a |
Low Pressure Side |
*b |
High Pressure Side |
Symptom |
Probable Cause |
Diagnosis |
Corrective Action |
---|---|---|---|
|
Gas leakage from refrigeration system |
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(4) The A/C system does not function effectively due to poor circulation of the refrigerant.
*a |
Low Pressure Side |
*b |
High Pressure Side |
Symptom |
Probable Cause |
Diagnosis |
Corrective Action |
---|---|---|---|
|
Refrigerant flow obstructed by dirt in condenser |
Condenser clogged |
Replace condenser |
(5) The A/C system does not function or functions intermittently because the refrigerant does not circulate.
*a |
Low Pressure Side |
*b |
High Pressure Side |
Symptom |
Probable Cause |
Diagnosis |
Corrective Action |
---|---|---|---|
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Refrigerant does not circulate |
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(6) The A/C system does not function effectively due to the system being overcharged with refrigerant or insufficient cooling of the condenser.
*a |
Low Pressure Side |
*b |
High Pressure Side |
Symptom |
Probable Cause |
Diagnosis |
Corrective Action |
---|---|---|---|
Pressure extremely high on both low and high-pressure sides |
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(7) The A/C system does not function due to air in the refrigeration system.
CAUTION:
The low-pressure piping may be very hot and cause serious burns.
NOTICE:
These gauge indications occur when the refrigeration system opens and the system is charged with refrigerant without vacuum purging.
*a |
Low Pressure Side |
*b |
High Pressure Side |
Symptom |
Probable Cause |
Diagnosis |
Corrective Action |
---|---|---|---|
|
Air in refrigeration system |
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(8) The A/C system does not function effectively due to an expansion valve malfunction.
*a |
Low Pressure Side |
*b |
High Pressure Side |
Symptom |
Probable Cause |
Diagnosis |
Corrective Action |
---|---|---|---|
|
Problem with expansion valve |
|
Replace expansion valve |
(9) The A/C system does not function due to a defective compressor.
*a |
Low Pressure Side |
*b |
High Pressure Side |
Symptom |
Probable Cause |
Diagnosis |
Corrective Action |
---|---|---|---|
|
Internal leakage in compressor |
|
Repair or replace compressor |
Evaporator Temperature Sensor Circuit (B1413)
DESCRIPTION
The cooler thermistor sensor (evaporator temperature sensor) is installed on
the evaporator in the air conditioner unit to detect the temperature of the cooled
air that has passed through the evaporator and is used to control the air conditioning.
It sends signals to the air condi ...
Operation Check
OPERATION CHECK
CHECK PRE-COLLISION SYSTEM SETTING
(a) Turn the ignition switch to ON.
(b) Operate the steering pad switch assembly to change the setting of PCS on
the multi-information display to "On" and check that the pre-collision system turns
on.
HINT:
When the ignition switc ...
Removal
REMOVAL
PROCEDURE
1. REMOVE FRONT NO. 2 EXHAUST PIPE ASSEMBLY (for 2GR-FKS)
2. REMOVE PROPELLER SHAFT HEAT INSULATOR BRACKET SUB-ASSEMBLY
(a) Remove the 2 bolts and propeller shaft heat insulator bracket.
3. REMOVE FRONT PROPELLER SHAFT ASSEMBLY
(a) Place matchmarks on the propeller sh ...