AIR CONDITIONING SYSTEM, Diagnostic DTC:B1497/97

DTC Code DTC Name
B1497/97 BUS IC Communication Malfunction

DESCRIPTION

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

DTC No. DTC Detection Condition Trouble Area
B1497/97 Communication line error or open

  • Air conditioning harness

  • A/C amplifier

WIRING DIAGRAM

A015YU2E05

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (A/C AMPLIFIER - BODY GROUND)


    1. Remove the A/C amplifier.

    2. A0162IGE11

      Disconnect the A/C amplifier connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      J58-20 (GND) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  2. INSPECT A/C AMPLIFIER


    1. A0160AFE44

      Reconnect the A/C amplifier connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      e1-2 (BUS G) - J58-20 (GND) Always Below 1 Ω

    NG

    REPLACE A/C AMPLIFIER Click here

    OK

  3. INSPECT A/C AMPLIFIER


    1. A0160AFE45

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      e1-4 (B BUS) - e1-2 (BUS G) Engine switch off Below 1 V
      e1-4 (B BUS) - e1-2 (BUS G) Engine switch on (IG) 11 to 14 V

    NG

    REPLACE A/C AMPLIFIER Click here

    OK

    REPLACE AIR CONDITIONING HARNESS Click here