Air Conditioning System (For Manual Air Conditioning System)

AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Manual Air Conditioning System): B1497/97: BUS IC Communication Malfunction
B1497/97 - BUS IC Communication Malfunction

DESCRIPTION

The air conditioning harness connects the air conditioning amplifier and the servos. The air conditioning amplifier supplies power and sends operation instructions to each servo through the air conditioning harness. Each servo sends damper position information to the air conditioning amplifier.





WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK AIR CONDITIONING AMPLIFIER

(a) Remove the air conditioning amplifier with its connectors still connected Removal.





(b) Measure the resistance according to the value(s) in the table below.

Standard resistance:





NG -- CHECK GROUND LINE AND AIR CONDITIONING AMPLIFIER
OK -- Continue to next step.

2. CHECK AIR CONDITIONING AMPLIFIER

(a) Remove the air conditioning amplifier with its connectors still connected Removal.





(b) Measure the voltage according to the value(s) in the table below.

Standard voltage:





NG -- REPLACE AIR CONDITIONING AMPLIFIER Removal

OK -- REPLACE AIR CONDITIONING HARNESS ASSEMBLY