AC-40 AIR CONDITIONING SYSTEM — Amplifiers Wire Harness Side [Diagram showing connector with pins labeled F, E, D, C, B, A and numbered 1-10] S-12-1 AMPLIFIERS INSPECTION OF AMPLIFIER INSPECT AMPLIFIER CIRCUIT Disconnect the amplifier and inspect the connector on the wire harness side as shown in the chart below. Test conditions: (1) Ignition switch: ON (2) Temperature control lever: MAX COOL (3) Blower switch: HI Check for | Tester connection | Condition | Specified value Continuity | 10 — Ground | Constant | Continuity Voltage | 2 — 10 | Turn A/C switch on. | Battery voltage | | Turn A/C switch off. | No voltage Resistance | 6 — 9 | Constant | Approx. 1.5 kΩ at 25°C (77°F) INSPECTION OF SYSTEM AMPLIFIER (In A/C Control Panel Assembly) 1. False Signal Input to System Amplifier. False Signal | A | B Condition | Interior room temperature is very low. | Interior room temperature is very high. | [Diagram showing SYSTEM AMPLIFIER connected to IN-CAR SENSOR marked OPEN] | [Diagram showing SYSTEM AMPLIFIER connected to IN-CAR SENSOR marked SHORT with ground] | AC-1570 | AC-1571 Your Work | Remove in-car sensor connector | Remove in-car sensor and ground the number 1 pin of in-car sensor female connector