{"model":"mk4","model_name":"MK4 Supra","vehicle":"Toyota Supra A80 (1993–2002, 2JZ-GE / 2JZ-GTE)","document":"Repair Manual","section":"AC","section_name":"Air Conditioning","page":35,"pages_in_section":111,"title":"Inspection Procedure","section_header":"Air Conditioning System — Troubleshooting","ocr_text":"AC–35\nAIR CONDITIONING SYSTEM – TROUBLESHOOTING\n\nINSPECTION PROCEDURE\n\n1 Check voltage between terminals TW and SG of A/C amplifier connector.\n\nON\nConnect\n\nTW    SG\n\nBE3840\nN08797\n\nP Remove A/C amplifier with connectors still connected.\n\nC 1. Turn ignition switch ON.\n2. Measure voltage between terminal TW of SG of A/C amplifier connector at each temperature.\n\nOK Voltage:\nat 0˚C (32˚F):   2.8 ~ 3.2  V\nat 40˚C (104˚F):  1.8 ~ 2.2  V\nat 70˚C (158˚F):  1.3 ~ 1.5  V\n\nHINT: As the temperature increases, the voltage decreases gradually.\n\nNG\n\nOK Proceed to next circuit inspection shown on matrix chart (See page AC–26). However, if the light is still blinking, check and replace A/C amplifier.\n\n2 Check engine coolant temperature sensor.\n\nN08773\n\nP 1. Remove A/C unit (See page AC–80).\n2. Remove engine coolant temperature sensor.\n\nC Measure resistance between terminals 1 and 2 of engine coolant temperature sensor connector at each temperature.\n\nOK Resistance:\nat  0˚C (32˚F):    Below 50 k\nat  40˚C (104˚F):  2.4 ~  2.8 k\nat 100˚C (212˚F):  Over 0.2 k\n\nHINT: As the temperature increases, the resistance decreases gradually.\n\nOK\n\nNG Replace engine coolant temperature sensor.\n\n3 Check harness and connector between A/C amplifier and engine coolant temperature sensor (See page IN–30).\n\nOK\n\nNG Repair or replace harness or connector.\n\nCheck and replace A/C 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