B1497

AIR CONDITIONING: AIR CONDITIONING SYSTEM: B1497/97: BUS IC Communication Malfunction
B1497/97 - BUS IC Communication Malfunction

DESCRIPTION

The air conditioning harness assembly connects the air conditioning amplifier and each servomotor. The A/C amplifier supplies power and sends operation instructions to each servomotor through the air conditioning harness assembly. Each servomotor sends the damper position information to the A/C amplifier.





WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. INSPECT AIR CONDITIONING AMPLIFIER

(a) Remove the A/C amplifier with connectors still connected.





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

Standard Voltage:





NG -- REPLACE AIR CONDITIONING AMPLIFIER
OK -- Continue to next step.

2. INSPECT AIR CONDITIONING AMPLIFIER

(a) Remove the A/C amplifier with connectors still connected.





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

Standard Voltage:





NG -- REPLACE AIR CONDITIONING AMPLIFIER

OK -- REPLACE AIR CONDITIONING HARNESS ASSEMBLY