cardiagn.com (a) Disconnect the R7 front room temperature sensor connector. (b) Measure the resistance between terminals 1 and 2 the of front room temperature sensor connector at each temperature. Standard resistance: 1.65 to 1.75 kΩ at 25°C (77°F) 0.55 to 0.65 kΩ at 50°C (122°F) HINT: As the temperature increases, the resistance decreases. REPLACE FRONT ROOM TEMPERATURE NG SENSOR OK 3. CHECK WIRE HARNESS (AIR CONDITIONING AMPLIFIER - FRONT ROOM TEMPERATURE SENSOR) REPAIR OR REPLACE HARNESS AND NG CONNECTOR OK REPLACE AIR CONDITIONING AMPLIFIER NG REPLACE FRONT ROOM TEMPERATURE SENSOR NG REPAIR OR REPLACE HARNESS AND CONNECTOR OK REPLACE AIR CONDITIONING AMPLIFIER