Diesel Data: Automotive Repair

Temperature Control Switch Circuit


Temperature Control Switch Circuit





CIRCUIT DESCRIPTION
By turning the temp. control switch, the set temperature of the NC can be adjusted in steps of 1°F (USA) or 0.5°C (Canada). Turning the switch fully will set the A/C to MAX. COLD or MAX. HOT
The ECU calculates the set temperature from the combination of Hi (5V) or Low (0 V) terminals SET 1-5 of the temp. control 5W and displays the set temperature on the LCD display.
If a malfunction occurs in the temp. control 5W circuit, malfunctions such as not being able to set the desired temperature occur.





WIRING DIAGRAM

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INSPECTION PROCEDURE