AC-23 AIR CONDITIONING SYSTEM – TROUBLESHOOTING A C AMPLIFIER TERMINAL STANDARD VALUE A14 A13 A12 8 7 6 5 4 3 2 1 7 6 5 4 3 2 1 9 8 7 6 5 4 3 2 1 20 19 18 17 16 15 14 13 12 11 10 9 18 17 16 15 14 13 12 11 10 9 8 22 21 20 19 18 17 16 15 14 13 12 11 10 N08791 Terminal No. | Symbol | Tester Connection | Wiring Color | Condition | Standard Value A12-1 | L-B/L | A12-1↔A14-9 | BR-W↔W-B | IG ON. B/L mode switch: OFF→ON | 10~14 V → Below 1.0 V A12-2 | L-FACE | A12-2↔A14-9 | G↔W-B | IG ON. FACE mode switch: OFF→ON | 10~14 V → Below 1.0 V A12-3 | L-M1 | A12-3↔A14-9 | P-B↔W-B | IG ON. Fan speed dial: LO→M1 | 10~14 V → Below 1.0 V A12-4 | L-DEF | A12-4↔A14-9 | R-Y↔W-B | IG ON. DEF mode switch: OFF→ON | 10~14 V → Below 1.0 V A12-6 | L-AUTO | A12-6↔A14-9 | R-B↔W-B | IG ON. AUTO switch: OFF→ON | 10~14 V → Below 1.0 V A12-7 | A/C-IN | A12-7↔A14-9 | L↔W-B | IG ON. A/C compressor: ON→OFF | 10~14 V → Below 1.0 V A12-8 | MDEF | A12-8↔A14-9 | Y-L↔W-B | IG ON. Mode control switch: FACE→DEF | Below 1.0 V → 10~14 V A12-9 | MFAC | A12-9↔A14-9 | W↔W-B | IG ON. Mode control switch: DEF→FACE | Below 1.0 V → 10~14 V A12-10 | L-F/D | A12-10↔A14-9 | BR↔W-B | IG ON. F/D mode switch: OFF→ON | 10~14 V → Below 1.0 V A12-11 | L-FOOT | A12-11↔A14-9 | Y↔W-B | IG ON. FOOT mode switch: OFF→ON | 10~14 V → Below 1.0 V A12-12 | L-HI | A12-12↔A14-9 | LG↔W-B | IG ON. Fan speed dial: LO→HI | 10~14 V → Below 1.0 V A12-13 | L-LO | A12-13↔A14-9 | R↔W-B | IG ON. Fan speed dial: HI→LO | 10~14 V → Below 1.0 V A12-14 | L-M2 | A12-14↔A14-9 | B-W↔W-B | IG ON. Fan speed dial: LO→M2 | 10~14 V → Below 1.0 V A12-15 | L-M3 | A12-15↔A14-9 | P↔W-B | IG ON. Fan speed dial: LO→M3 | 10~14 V → Below 1.0 V A12-16 | L-RDEF | A12-16↔A14-9 | V↔W-B | IG ON. Rear DEF switch: OFF→ON | 10~14 V → Below 1.0 V A12-17 | L-REC | A12-17↔A14-9 | LG-B↔W-B | IG ON. REC mode switch: OFF→ON | 10~14 V → Below 1.0 V A12-18 | L-FRS | A12-18↔A14-9 | GR↔W-B | IG ON. FRS mode switch: OFF→ON | 10~14 V → Below 1.0 V A12-19 | L-A/C | A12-19↔A14-9 | B↔W-B | IG ON. A/C switch: OFF→ON | 10~14 V → Below 1.0 V A12-20 | ACC | A12-20↔A14-9 | L-R↔W-B | Turn ignition switch ACC | 10~14 V A12-21 | IGN | A12-21↔A14-9 | B-W↔W-B | Start the engine | Pulse signal A12-22 | LOCK-IN | A12-22↔A13-9 | G-Y↔V-W | IG ON. A/C compressor: ON | Pulse signal A13-1 | MC | A13-1↔A14-9 | R-Y↔W-B | Temperature set: MAX. HOT→MAX. COOL | Below 1.0 V → 10~14 V A13-2 | S5 | A13-2↔A14-9 | BR-W↔W-B | Always | 4.5~5.5 V