AC–24 AIR CONDITIONING SYSTEM – TROUBLESHOOTING Terminal No. | Symbol | Tester Connection | Wiring Color | Condition | Standard Value A13-3 | MH | A13-3↔A14-9 | V↔W-B | Temperature set: MAX. COOL→MAX. HOT | Below 1.0 V → 10~14 V A13-5 | TR | A13-5↔A13-9 | Y-L↔V-W | Cabin temp.: 25°C (77°F)/40°C (104°F) | 1.8~2.2 V/ 1.2~1.6 V A13-6 | TAM | A13-6↔A13-9 | P-B↔V-W | Cabin temp.: 25°C (77°F)/40°C (104°F) | 1.3~1.8 V/ 0.8~1.3 V A13-7 | TE | A13-7↔A13-9 | L-Y↔V-W | Evapo. Ambient Temp.: 0°C (32°F)/15°C (59°F) | 2.0~2.4V/1.4~1.8V A13-9 | SG | A13-9↔Body GND | V-W↔Body GND | Always | Below 1 Ω A13-11 | SPD | A13-11↔A14-9 | P↔W-B | Turn the propeller shaft slowly. | 10~14 V→ Below 1.0 V A13-14 | PSW | A13-14↔A14-9 | L-Y↔W-B | Normal A/C pressure | Below 1.0 V A13-16 | TW | A13-16↔A13-9 | LG-R↔V-W | Engine coolant temp.: 0°C (32°F)/40°C (104°F) | 2.8~3.2 V/ 1.8~2.2 V Engine coolant temp.: 70°C (158°F) | 0.9~1.3 V A13-17 | TS | A13-17↔A13-9 | Y-G↔V-W | Sensor subjected to electric light | 0.8↔4.3 V Sensor covered by a cloth | Below 0.8 V A13-18 | TP | A13-18↔A13-9 | G-W↔V-W | Temperature set: MAX. COOL→MAX. HOT | 3.7~4.3 V→ 0.8~1.2 V A14-6 | MGC | A14-6↔A14-9 | L-R↔W-B | A/C compressor: ON → OFF | Below 1.0 V → 10~14 V A14-7 | +B | A14-7↔A14-9 | W-R↔W-B | Always | 10~14 V A14-8 | IG | A14-8↔A14-9 | R-L↔W-B | Turn ignition switch IG | 10~14 V A14-9 | GND | A14-9↔Body GND | W-B↔Body GND | Always | Below 1Ω A14-10 | TPM | A14-10↔A13-9 | LG↔V-W | IG ON. Mode control switch: FACE→DEF | 3.7 V~4.3 V→ 0.8~1.2 V A14-11 | TSET | A14-11↔A13-9 | L-B↔V-W | IG ON. Temperature set: MAX.HOT→MAX.COOL | Below 0.3 V→ Over 4.7 V A14-15 | BLW | A14-15↔A14-9 | L↔W-B | IG ON. Fan speed: LO→HI | Approx. 1 V→ Approx. 2 V A14-16 | HR | A14-16↔A14-9 | L-W↔W-B | IG ON. OFF switch: ON mode→ OFF mode Mode control switch: DEF | Below 1.0 V→ 10~14 V A14-17 | MR/F | A14-17↔A14-9 | GR↔W-B | During cool-down on AUTO after hot soak | Below 1.0 V A14-18 | RDEF | A14-18↔A14-9 | B↔W-B | IG ON. Rear DEF switch: OFF→ON | 10~14 V→ Below 1.0 V* A14-19 | MREC | A14-19↔A14-9 | G-R↔W-B | IG ON. Air inlet control switch: FRS→REC | 10~14 V→ Below 1.0 V A14-20 | MFRS | A14-20↔A14-9 | G↔W-B | IG ON. Air inlet control switch: REC→FRS | 10~14 V→ Below 1.0 V * After 15 minutes, ON mode will change to OFF mode automatically.