Air Conditioning System

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

DTC B1497/97 - BUS IC Communication Malfunction

DESCRIPTION

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






INSPECTION PROCEDURE

PROCEDURE

1. CHECK AIR CONDITIONING AMPLIFIER




(a) Remove the A/C amplifier with its connectors still connected.
(b) Measure the resistance of the connector.
Standard resistance:






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

2. CHECK AIR CONDITIONING AMPLIFIER




(a) Measure the voltage of the connector.
Standard voltage:






NG -- REPLACE AIR CONDITIONING AMPLIFIER
OK -- REPLACE AIR CONDITIONING HARNESS