DI563 DI560 IN27 DI536 DIAGNOSTICS AIR CONDITIONING SYSTEM 688Author\u0102 Date\u0102

Di563 di560 in27 di536 diagnostics air conditioning

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DI–563 DI–560 IN–27
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DI–536 DIAGNOSTICS AIR CONDITIONING SYSTEM 688 AuthorĂ: DateĂ: 1997 LEXUS ES300 (RM511U) No air inlet control 1. Air inlet damper position sensor circuit 2. Air inlet control servomotor circuit 3. A/C control assembly DI–560 DI–560 DI–566 IN–27 No air outlet control 1. Air outlet control servomotor circuit 2. A/C control assembly DI–574 IN–27 Engine idle up does not occur, or is continuous 1. Compressor circuit 2. Igniter circuit 3. A/C control assembly DI–569 DI–585 IN–27 Blinking of A/C switch indicator. 1. Compressor lock sensor circuit 2. A/C control assembly DI–552 IN–27 Set temperature value displayed does not much up with operation of temperature control switch. A/C control assembly IN–27 Brightness does not changes when rheostat volume or light con- trol switch it turned. 1. Illumination light system 2. A/C control assembly BE–2 IN–27 Unable to access the diagnosis mode. A/C control assembly IN–27 DTC not recorded. Set mode is cleared when IG switch is turned off. 1. Back–up power source circuit 2. A/C control assembly DI–578 IN–27
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DI0D8–01 I00315 Room Temp. Sensor 2 1 G–Y A14 4 5 V A/C Control Assembly 1 A13 SG TR J21 J20 D E W–B W–B J/C DIAGNOSTICS AIR CONDITIONING SYSTEM DI–537 689 AuthorĂ: DateĂ: 1997 LEXUS ES300 (RM511U) CIRCUIT INSPECTION DTC 11 Room Temperature Sensor Circuit CIRCUIT DESCRIPTION This sensor detects the temperature inside the cabin and sends the appropriate signals to the A/C control assembly. DTC No. Detection Item Trouble Area 11 Open or short in room temperature sensor circuit D Room temperature sensor D Harness or connector between room temp. sensor and A/C control Assembly D A/C control assembly WIRING DIAGRAM
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BE3840 I00316 I00333 ON SG(–) TR(+) I00317 DI–538 DIAGNOSTICS AIR CONDITIONING SYSTEM 690 AuthorĂ: DateĂ: 1997 LEXUS ES300 (RM511U) INSPECTION PROCEDURE 1 Check voltage between terminals TR and SG of air conditioning control assem- bly connector PREPARATION: (a) Remove A/C control assembly with connectors still con- nected (See page BO–79 ). (b) Turn the ignition switch ON. CHECK: Check voltage between terminals TR and SG of air conditioning control assembly connector at each temperature. OK: at 25 ° C (77 ° F): 1.8 – 2.2 V at 40 ° C (104 ° F): 1.2 – 1.6 V NG Go to step 2. OK Proceed to next circuit inspection shown on matrix chart (See page DI–535 ). However, if DTC 11 is displayed, check and replace air conditioning control assembly. 2 Check room temperature sensor. PREPARATION: (a) Remove room temperature sensor from safety pad No.2 (See page BO–79 ). (b) Disconnect room temperature sensor connector. CHECK: Check resistance between terminals 1 and 2 of room tempera- ture sensor connector at each temperature. OK: at 25 ° (77 ° F): 1.6 – 1.8 k at 40 ° (104 ° F): 0.5 – 0.7 k HINT: As the temperature increases, the resistance decreases. NG Replace room temperature sensor. OK
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DIAGNOSTICS AIR CONDITIONING SYSTEM DI–539 691 AuthorĂ: DateĂ: 1997 LEXUS ES300 (RM511U) 3 Check harness and connector between air conditioning control assembly and room temperature sensor (See page IN–27 ).
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