DTC    B1497/97    BUS IC Communication Malfunction

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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.

DTC No.
DTC Detection Condition
Trouble Area
B1497/97
Communication line error or open
  1. Wire harness
  2. A/C amplifier

INSPECTION PROCEDURE

1.CHECK AIR CONDITIONING AMPLIFIER
E107325E12

  1. Remove the A/C amplifier with its connectors still connected.

  1. Measure the resistance of the connector.

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Condition
    e1-2 (BUSG) - Body ground
    		Always
    		Below 1 Ω



NG
REPLACE AIR CONDITIONING AMPLIFIER
OK


2.CHECK AIR CONDITIONING AMPLIFIER
E107325E13

  1. Measure the voltage of the connector.

    Standard voltage:
    Tester Connection
    		Condition
    		Specified Condition
    e1-2 (BUSG) - e1-4 (BBUS)
    		Engine switch on (IG)
    		10 to 14 V
    Engine switch off
    		Below 1 V



NG
REPLACE AIR CONDITIONING AMPLIFIER
OK

REPLACE AIR CONDITIONING HARNESS