Dtc B1497/97 Bus Ic Communication Malfunction

Heater & Air Conditioning System. Camry. Acv40 Gsv40
Air Conditioning. Camry. Acv40 Gsv40

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK HARNESS AND CONNECTOR

INSPECT AIR CONDITIONING AMPLIFIER

INSPECT AIR CONDITIONING AMPLIFIER

REPLACE AIR CONDITIONING HARNESS

DTC B1497/97 BUS IC Communication Malfunction


DESCRIPTION

The air conditioning harness connects the air conditioning amplifier and each servo motor. The air conditioning amplifier supplies power and sends operation instructions to each servo motor through the air conditioning harness. Each servo motor 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. Air conditioning harness
  2. A/C amplifier

WIRING DIAGRAM


Camry. Acv40 Gsv40.Air Conditioning.Air Conditioning System. Dtc B1497/97 Bus Ic Communication Malfunction


INSPECTION PROCEDURE

1.CHECK HARNESS AND CONNECTOR

  1. Remove the A/C amplifier.



    Camry. Acv40 Gsv40.Air Conditioning.Air Conditioning System. Dtc B1497/97 Bus Ic Communication Malfunction

  1. Disconnect the connector from the A/C amplifier.

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

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Condition
    E38-14 (GND) - Body ground
    		Always
    		Below 1 Ω


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


2.INSPECT AIR CONDITIONING AMPLIFIER


    Camry. Acv40 Gsv40.Air Conditioning.Air Conditioning System. Dtc B1497/97 Bus Ic Communication Malfunction

  1. Reconnect the connector to the A/C amplifier.

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

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Condition
    e1-2 (BUS G) - E38-14 (GND)
    		Always
    		Below 1 Ω


NG
REPLACE AIR CONDITIONING AMPLIFIER
OK


3.INSPECT AIR CONDITIONING AMPLIFIER


    Camry. Acv40 Gsv40.Air Conditioning.Air Conditioning System. Dtc B1497/97 Bus Ic Communication Malfunction

  1. Disconnect the connector (e1) from the A/C amplifier .

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

    Standard voltage:
    Tester Connection
    		Condition
    		Specified Condition
    e1-4 (B BUS) - Body ground
    		Ignition switch: LOCK
    		Below 1 V
    e1-4 (B BUS) - Body ground
    		Ignition switch: ON
    		10 to 14 V


NG
REPLACE AIR CONDITIONING AMPLIFIER
OK


4.REPLACE AIR CONDITIONING HARNESS

  1. Replace the air conditioning harness.

    HINT:
    Since the air conditioning harness cannot be inspected while it is removed from the vehicle, replace the air conditioning harness with a normal one and check that the condition returns to normal.

  1. Check for DTCs.

    Result:
    Result
    		Proceed to
    DTC B1497/97 is output.
    		A
    DTC B1497/97 is not output.
    		B


B
END
A

REPLACE AIR CONDITIONING AMPLIFIER