Toyota Corolla (E120) 2002–2008 Repair Manual / Heater & air conditioner / Refrigerant / On–vehicle inspection
Toyota Corolla (E120): On–vehicle inspection
1. Inspect refrigerant pressure with manifold gauge set
- this is a method in witch the trouble is located by using
a manifold gauge set. Read the manifold gauge pressure
when the these conditions are established.
Test conditions:
- temperature at the air inlet with the switch set at recirc is 30 – 35 °c (86 – 95 °f)
- engine running at 1500 rpm
- blower speed control switch at ”hi” position
- temperature control dial at ”cool” position a/c switch on
- fully open doors
- Normally functioning refrigeration system.
Gauge reading:
low pressure side:
0.15 – 0.25 Mpa (1.5 – 2.5 Kgf/cm2) high pressure side:
1.37 – 1.57 Mpa (14 – 16 kgf/cm2)
- Moisture present in refrigeration system.
Symptom |
Probable cause |
Diagnosis |
Remedy |
During operation, pressure on low pressure side sometimes become a vacuum and sometime normal | Moisture in refrigerating system freezes at expansion valve orifice causing a temporary stop of cycle, however, when it melts, normal state is restored. |
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- Insufficient cooling
Symptom |
Probable cause |
Diagnosis |
Corrective actions |
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Gas leakage in refrigeration system |
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- Poor circulation of refrigerant
Symptom |
Probable cause |
Diagnosis |
Corrective actions |
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Refrigerant flow obstructed by dirt in receiver | Receiver clogged | Replace condenser |
- Refrigerant does not circulate
Symptom |
Probable cause |
Diagnosis |
Corrective actions |
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Refrigerant does not circulate |
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- Refrigerant overcharged or insufficient cooling of condenser
Symptom |
Probable cause |
Diagnosis |
Corrective actions |
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- Air present in refrigeration system
Symptom |
Probable cause |
Diagnosis |
Corrective actions |
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Air entered in refrigerating system |
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- Expansion valve improperly
Symptom |
Probable cause |
Diagnosis |
Corrective actions |
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Trouble in expansion valve |
|
Check expansion valve |
- Defective compression compressor
Symptom |
Probable cause |
Diagnosis |
Corrective actions |
|
Internal leak in compressor |
|
Repair or replace compressor |
Gauge readings (reference)
Other materials:
If the vehicle becomes stuck
Carry out the following procedures
if the tires spin or
the vehicle becomes stuck
in mud, dirt or snow:
Recovering procedure
1. Stop the engine. Set the
parking brake and shift the
shift lever to P.
Do not press the shift release button
after shifting the shift lever to P.
2. Remove the mud, snow ...
If you think something is wrong
If you notice any of the following symptoms, your vehicle probably needs adjustment
or repair. Contact your Toyota dealer as soon as possible.
Visible symptoms
● Fluid leaks under the vehicle.
(Water dripping from the air conditioning after use is normal.)
● Flat-looking tires or u ...
Skid control sensor
Replacement
Hint:
replace the rh side by the same procedure as the lh side.
1. Remove rear wheel
2. Remove rear brake drum sub–assy
3. Disconnect skid control sensor wire
Disconnect the skid control sensor wire connector from
the skid control sensor.
4. Remove rear axle hub & ...