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AUTO AMP. HAC-137 < ECU DIAGNOSIS > [AUTOMATIC AIR CONDITIONER] C D E F G H J K L M A B HAC N O P 26 (B/Y) Ground Sensor ground — Ignition switch ON 0 V 27 (LG) Ground In-vehicle sensor Input — — 28 (O/B) Ground Ambient sensor Input — — 31 (P) Ground Power supply for ambient Output — 5 V 35 (P) Ground CAN-L — — — 36 (R/Y) Ground ILL - — — 0 V 37 (B) Ground Ground (Power) — Ignition switch ON 0 V 39 (Y/R) Ground Power supply from BATT — Ignition switch OFF Battery voltage 40 (G) Ground Power supply from IGN — Ignition switch ON Battery voltage Terminal No. (Wire color) Description Condition Value (Approx.) + − Signal name Input/ Output |