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7B-56 Air Conditioning System: HVAC Control Module and Its Circuits Inspection S6JB0B7204032 CAUTION !
HVAC control module can not be checked by itself.
HVAC control module and its circuits can be checked at HVAC control module wiring couplers by measuring voltage. Voltage Check 1) Remove HVAC control module. Refer to “HVAC Control Module Removal and Installation in Section 7A”. module. 3) Check each terminal voltage with couplers connected by referring to “HVAC Control Module Voltage Table: ”. Terminal arrangement of HVAC control module (viewed from harness side) HVAC Control Module Voltage Table 16 15 14 13 12 11 10 8 6 5 4 3 2 1 32 31 30 29 28 27 23 22 21 20 19 18 17 I5JB0A720030-02 Terminal Wire color Circuit Normal value Condition G52-1 PPL/RED Power supply 10 – 14 V Ignition switch turned ON. G52-2 WHT Electric power source 10 – 14 V Constantly. G52-3 PPL/WHT Serial communication 10 – 14 V Ignition switch turned ON. G52-4 RED/YEL Illumination switch 0 – 1 V Ignition switch turned ON, lighting switch OFF 10 – 14 V Ignition switch turned ON, lighting switch ON G52-5 RED/GRN Illumination ground 0 – 1 V Constantly. G52-6 PNK/BLK Theft deterrent light — — G52-8 BLK/RED Rear defogger driving 10 – 14 V Ignition switch turned ON, rear defogger switch ON. 0 – 1 V Ignition switch turned ON, rear defogger switch OFF. G52-10 YEL/RED Serial communication Refer to “Inspection of BCM and Its Circuits in Section 10B”. G52-11 PNK/GRN Serial communication Refer to “Reference waveform No. 1: ”. G52-12 YEL Ground for sunload 0 – 1 V Constantly. G52-13 BLK/RED Ground for sensors 0 – 1 V Constantly. G52-14 RED/WHT Output of 5 V power 4 – 6 V Ignition switch turned ON. |