Last Modified: 11-29-2007 1.6 U
Service Category: Vehicle Interior Section: Heating/Air Conditioning
Model Year: 2008 Model: Sequoia Doc ID: RM000002VX2004X
Title: HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM: SYSTEM DIAGRAM (2008 Sequoia)

SYSTEM DIAGRAM



Communication table

Transmitter

Receiver

Line

Signal

Air Conditioning Amplifier

ECM

CAN
  • Heater idle up request signal
  • A/C idle up request signal
  • Outside temperature data
  • Request signal for air conditioning performance assist
  • Request acceleration cut prohibit signal
  • A/C control priority signal
  • Charge control prohibit signal

Air Conditioning Amplifier

Combination Meter

CAN
  • Outside temperature data

Air Conditioning Amplifier

DLC3

CAN
  • Diagnostic tool response

Air Conditioning Amplifier

Integration Control and Panel

LIN
  • Front panel indication signal
  • AUTO indication signal
  • Blower level indication signal
  • A/C indication signal
  • REC indication signal
  • MODE indication signal
  • RDEF indication signal
  • Independence or subordinate indication signal
  • Driver seat set temperature indication signal
  • Passenger seat set temperature indication signal
  • Dimmer signal

Air Conditioning Amplifier

Air Conditioning Control

LIN
  • Rear panel indication signal
  • AUTO indication signal
  • Blower level indication signal
  • MODE indication signal
  • Independence or subordinate indication signal
  • Rear seat set temperature indication signal
  • Dimmer signal

Combination Meter

Air Conditioning Amplifier

CAN
  • Vehicle speed signal
  • Temperature unit signal
  • Destination information

ECM

Air Conditioning Amplifier

CAN
  • Engine coolant temperature signal
  • Engine rpm data
  • A/C control cut-off signal
  • E/G type information
  • Load control level signal

Main Body ECU

Air Conditioning Amplifier

CAN
  • Display dimmer control signal
  • Back door power window position signal

Integration Control and Panel

Air Conditioning Amplifier

LIN
  • Front A/C switch signal
  • AUTO switch signal
  • OFF switch signal
  • Blower switch signal (UP, DOWN)
  • MODE switch signal
  • DEF switch signal
  • RDEF switch signal
  • Driver seat set temperature signal
  • Passenger seat set temperature signal
  • 3 ZONE switch signal

Air Conditioning Control

Air Conditioning Amplifier

LIN
  • OFF switch signal
  • AUTO switch signal
  • MODE switch signal
  • Blower switch signal (UP, DOWN)
  • Rear seat set temperature signal