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Home >> Toyota >> 2012 >> Highlander Limited, FWD >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> Air Conditioning (Automatic) (Diagnostic Codes & Circuit Tests) (Except Hybrid) >> AIR CONDITIONING SYSTEM (for Automatic Air Conditioning System) >> DTC B1497/97: BUS IC Communication Malfunction >> Description

DTC B1497/97: BUS IC Communication Malfunction: Description

for Front Side: 

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.

for Rear Side (w/ Rear Air Conditioning System): 

The rear 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
  • Air conditioning harness
  • Rear air conditioning harness*1
  • Air mix control servo motor (for driver side)
  • Air mix control servo motor (for front passenger side)
  • Air outlet control servo motor
  • Air inlet control servo motor
  • Rear air outlet control servo motor*1
  • Rear air mix control servo motor*1
  • Air conditioning amplifier
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