ON-VEHICLE INSPECTION
- INSPECTION HOSE AND TUBE CONNECTIONS FOR LOOSENESS
- INSPECT HOSES AND TUBES FOR LEAKAGE Using a gas leak detector, check for leakage of refrigerant.
Scheme 112
INSPECTION
- CHECK HEATER RADIATOR FINS FOR BLOCKAGE If the fins are clogged, remove them with compressed air.
- CHECK FITTING FOR CRACKS OR SCRATCHES If necessary repair or replace.
- INSPECT AIR INLET SERVOMOTOR OPERATION (See «DTC 42 AIR INLET DAMPER CONTROL SERVOMOTOR CIRCUIT»(ref-215708-S08511526912006011800000) )
- INSPECT AIR INLET DAMPER POSITION SENSOR CIRCUIT (See «DTC 32, 42 AIR INLET DAMPER POSITION SENSOR CIRCUIT»(ref-215708-S06896182592006011800000) )
- INSPECT CONDENSER FINS FOR BLOCKAGE OR DAMAGE If the fins are clogged, wash them with water and dry with compressed air. NOTE: Be careful not to damage the fins. If the fins are bent, straighten them with a screwdriver or pliers.
- INSPECT CONDENSER AND FITTINGS FOR LEAKAGE Using a gas leak detector, check for leaks of refrigerant. If there is a leakage, check the tightening torque at the joints.
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- DISCHARGE REFRIGERANT FROM REFRIGERATION SYSTEM HINT: At the time of installation, evacuate air from the refrigeration system and charge system with the refrigerant and inspect for leaks of the refrigerant. Specified amount: 1,050 +/- 50 g (37.04 +/- 1.76 oz.)
- REMOVE A/T OIL COOLER
- REMOVE ENGINE UNDER COVER
- REMOVE DISCHARGE TUBE Remove the bolt and disconnect the discharge tube from the condenser. Torque: 10 N.m (100 kgf.cm, 7 ft.lbf) Loosen the nut and remove the discharge tube. Torque: 22 N.m (225 kgf.cm, 16 ft.lbf) NOTE: Cap the open fittings immediately to keep moisture or dirt out of the system. HINT: At the time of installation, lubricate 2 new O-rings with compressor oil and install them on the discharge tube.
- DISCONNECT LIQUID TUBE Remove the bolt and disconnect the liquid tube. Torque: 10 N.m (100 kgf.cm, 7 ft.lbf) NOTE: Cap the open fittings immediately to keep moisture or dirt out of the system. HINT: At the time of installation, lubricate a new O-ring with compressor oil and install them on the liquid tube.
- REMOVE CONDENSER Remove the 4 bolts and the 2 upper bracket. Lift up the condenser, then remove the 4 bolts and the 2 lower bracket. Remove the 2 bolts and the 2 center bracket. Remove the condenser. HINT: At the time of installation, please refer to the following item. If condenser is replaced, add compressor oil to condenser. Add: 40 - 50 cc (1.4 - 1.7 fl.oz.) Compressor oil: ND-OIL 8 or equivalent
- CHECK EVAPORATOR FINS FOR BLOCKAGE If the fins are clogged, remove them with compressed air. NOTE: Never use water to clean the evaporator.
- CHECK FITTINGS FOR CRACKS OR SCRATCHES If necessary, repair or replace.
- INSPECT EVAPORATOR TEMPERATURE CIRCUIT (See «DTC 13 FRONT EVAPORATOR TEMPERATURE SENSOR CIRCUIT»(ref-215708-S30390621242006011800000) )
HINT
The rear heater relay is built in the engine room junction block.
Since the relay is constructed with a relay block that is in the junction block as a unit, it is impossible to disconnect the wire harness connecting with the relay block.
If the relay has a malfunction, replace it with the junction block assembly wire harness together.
Scheme 119
Scheme 120
- REMOVE ENGINE ROOM J/B
- INSPECT REAR HEATER RELAY CONTINUITY REAR HEATER RELAY CONTINUITY TABLE Condition Tester connection Specified condition Constant 29 - 31 Continuity Apply B+ between terminals 29 and 31. 2 - 3 Continuity If continuity is not as specified, replace the engine room J/B.
- INSTALL ENGINE ROOM J/B
HINT
The magnetic clutch relay is built in the engine room junction block. Since the relay is constructed with a relay block that is in the junction block as a unit, it is impossible to disconnect the wire harness connecting with the relay block.
If the relay has a malfunction, replace it with the junction block assembly wire harness together.
Scheme 121
Scheme 122
- REMOVE ENGINE ROOM J/B
- INSPECT MAGNETIC CLUTCH RELAY CONTINUITY MAGNETIC CLUTCH RELAY CONTINUITY TABLE Condition Tester connection Specified condition Constant 57 - 65 Continuity Apply B+ between terminals 57 and 65 63 - 65 Continuity If continuity is not as specified, replace the engine room J/B.
- INSTALL ENGINE ROOM J/B
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- REMOVE CENTER CLUSTER FINISH PANEL Disengage the 9 clips and remove the center cluster finish panel, then disconnect the connector.
- REMOVE CENTER RESISTORS Disengage the 6 clips and remove the center resistors both side.
- REMOVE INTEGRATION CONTROL PANEL ASSEMBLY Remove the 4 bolts. Disengage the 7 clips and remove the integration control panel assembly, then disconnect the connectors.
- w/ LEXUS navigation system: REMOVE A/C AMPLIFIER Disconnect the connector clamp. Remove the 3 screws, the 4 bolts and the radio receiver bracket LH. Remove the 2 screws and the A/C amplifier.
- w/ LEXUS navigation system: REMOVE EMV Remove the 2 screws, the 2 bolts and the EMV.
- w/ LEXUS navigation system: REMOVE INTEGRATION CONTROL PANEL Disconnect the connector clamps. Remove the screw, the 2 bolts and the radio receiver bracket RH. Remove the integration control panel from the radio receiver.
- w/o LEXUS navigation system: REMOVE INTEGRATION CONTROL PANEL Disconnect the connector clamp. Remove the 6 bolts and the radio receiver bracket LH. Disconnect the connector clamp. Remove the 6 bolts and the radio receiver bracket RH. Remove the integration control panel.
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Scheme 141
- w/LEXUS navigation system: REMOVE KNOB Using a screwdriver, pull out the knobs. HINT: Tape up the screwdriver tip before use.
- w/ LEXUS navigation system: REMOVE INTEGRATION CONTROL PANEL Remove the 3 screws. Remove the screw and the board.
- w/ LEXUS navigation system: REMOVE HEATER CONTROL HOUSING Disconnect the connector clamps. Remove the 2 screws and pull out the board from the heater control housing.
- REMOVE KNOB Using a screwdriver, pull out the knobs. HINT: Tape up the screwdriver tip before use. Remove the nut.
- w/o LEXUS navigation system: REMOVE KNOB Using a screwdriver, pull out the knobs. HINT: Tape up the screwdriver tip before use.
- w/o LEXUS navigation system: REMOVE INTEGRATION CONTROL PANEL Remove the 6 screws and pull out the A/C amplifier. Remove the 5 screws and the board.
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- w/o LEXUS navigation system: INSPECT ILLUMINATION OPERATION Connect the positive (+) lead from the battery to terminal C10 and negative (-) lead to terminal C19 then check that the indicators' illuminate. If operation is not as specified, check the faulty bulb. Remove the bulb (See «DISASSEMBLY»(ref-215765-S39520878232006081800000) ). Using the tester (Scheme 143), test the continuity. If continuity exists, replace the heater control. If no continuity exists, replace the bulb.
- w/o LEXUS navigation system: INSPECT INDICATORS OPERATION Connect the positive (+) lead from the battery to terminal C22 and negative (-) lead to terminal C12. Check that the indicators come on while operate the switches. If operation is not as specified, replace the heater control.
- INSPECT A/C CONTROL ASSEMBLY CIRCUIT (See «TERMINALS OF ECU»(ref-215708-S00533108252006011800000) )
- w/ LEXUS navigation system: INSPECT INDICATORS OPERATION Connect the positive (+) lead from the battery to terminal A8 and negative (-) lead to terminal A16. Check that the indicators come on while operating the switches. If operation is not as specified, replace the heater control.
- INSPECT A/C CONTROL ASSEMBLY CIRCUIT (See «TERMINALS OF ECU»(ref-215708-S00533108252006011800000) )