air conditioning TOYOTA RAV4 2006 Service Owner's Guide

AIR CONDITIONING – AIR CONDITIONING SYSTEM (for Automatic Air Conditioning Sys-
tem)AC–9
AC
SYSTEM DIAGRAM
(2005/11-2006/01)
E123515E02

AC–10AIR CONDITIONING – AIR CONDITIONING SYSTEM (for Automatic Air Conditioning Sys-
tem)
AC
Communication table
Sender Receiver Signal Communication Line
Air conditioning amplifier ECMA/C compressor control signal
CAN Idle up request signal
External variable control solenoid
current signal
Cooling fan motor driving request
signal
Ambient temperature signal
Air conditioning amplifier Air conditioning control assemblyFront panel indication signal
LIN AUTO indication signal
A/C indication signal
MODE indication signal
REC indication signal
FRS indication signal
RDEF indication signal
Blower level indication signal
Set temperature indication signal
Combination meter assembly Air conditioning amplifierVehicle speed signal
CAN
Ambient temperature signal
ECM Air conditioning amplifierEngine revolution speed signal
CAN Engine coolant temperature
signal
A/C control cut signal
Variable control prohibition signal
Air conditioning control assembly Air conditioning amplifierAUTO switch signal
LIN OFF switch signal
A/C switch signal
DEF switch signal
MODE switch signal
RDEF switch signal
Blower switch signal (FAN+, FAN-
)
Set temperature switch signal
(UP, DOWN)

AIR CONDITIONING – AIR CONDITIONING SYSTEM (for Automatic Air Conditioning Sys-
tem)AC–11
AC
SYSTEM DIAGRAM
(2006/01- )
E127579E01

AC–12AIR CONDITIONING – AIR CONDITIONING SYSTEM (for Automatic Air Conditioning Sys-
tem)
AC
Communication table
Sender Receiver Signal Communication Line
Air conditioning amplifier ECMA/C compressor control signal
CAN Idle up request signal
External variable control solenoid
current signal
Cooling fan motor driving request
signal
Ambient temperature signal
Air conditioning amplifier Air conditioning control assemblyFront panel indication signal
LIN AUTO indication signal
A/C indication signal
MODE indication signal
REC indication signal
FRS indication signal
RDEF indication signal
Blower level indication signal
Set temperature indication signal
Combination meter assembly Air conditioning amplifierVehicle speed signal
CAN
Ambient temperature signal
ECM Air conditioning amplifierEngine revolution speed signal
CAN Engine coolant temperature
signal
A/C control cut signal
Variable control prohibition signal
Air conditioning control assembly Air conditioning amplifierAUTO switch signal
LIN OFF switch signal
A/C switch signal
DEF switch signal
MODE switch signal
RDEF switch signal
Blower switch signal (FAN+, FAN-
)
Set temperature switch signal
(UP, DOWN)

AIR CONDITIONING – AIR CONDITIONING SYSTEM (for Automatic Air Conditioning Sys-
tem)AC–13
AC
SYSTEM DESCRIPTION
1. GENERAL
(a) The air conditioning system has the following
features:
• In accordance with the temperature set using the
temperature control switch, the air conditioning
amplifier determines the outlet temperature
based on the input signals from various sensors.
In addition, corrections are made in accordance
with the signals from the water temperature
sensor to control the outlet air temperature.
• Controls the blower motor in accordance with the
airflow volume determined by the air conditioning
amplifier based on the input signals from various
sensors.
• Automatically changes the outlets in accordance
with the outlet mode ratio that is determined by
the air conditioning amplifier based on the input
signals from various sensors.
• Based on the signals from the ambient
temperature sensor, this system calculates the
outside temperature and indicates it in the multi-
information display in the combination meter
assembly.
• The left/right independent temperature control
and neural network control make air conditioner
control available to suit the persons in the driver
seat and in the passenger seat.
• Turns the rear defogger and outside rear mirror
heaters on for 15 minutes when the rear
defogger switch is pressed. Turns them off if the
switch is pressed while they are operating.
• Checks the sensors in accordance with the
operation of the air conditioner switches.
• The air conditioning amplifier has the function of
controlling the indicator lighting.

AC–14AIR CONDITIONING – AIR CONDITIONING SYSTEM (for Automatic Air Conditioning Sys-
tem)
AC
2. MODE POSITION AND DAMPER OPERATION
Control Damper Control PositionDamper
PositionOperation
Air Inlet Control DamperFRESH A Brings in fresh air.
RECIRC B Recirculates internal air.
Air Mix Control
Damper (Left/
Right
Independent
Control)Driver and Front
Passenger SideMAX COOL to MAX HOT
(TEMP. SETTING 18 to 32
C
(65 to 85
F))C, D, EVaries mixture ratio of fresh air and recirculation
air in order to regulate temperature continuously
from HOT to COOL.
E123516E03

AIR CONDITIONING – AIR CONDITIONING SYSTEM (for Automatic Air Conditioning Sys-
tem)AC–15
AC
3. AIR OUTLET AND AIRFLOW VOLUME
Mode Control
Film DamperDriver and Front
Passenger SideFA C E
I, J, L, P, UAir blows out of center registers and side
registers.
BI-LEVEL
I, Q, M, R,
TAir mainly blows out of center registers, side
registers, and footwell register ducts.
FOOT
H, K, N, O,
SAir mainly blows out of front and rear footwell
register ducts.
In addition, air blows out slightly from front and
side defrosters, and side registers.
FOOT/DEF
G, K, N, O,
TAir mainly blows out of front and side defrosters
to defrost windshield. Air also blows out from
front and rear footwell register ducts, and side
registers.
DEF
F, K, N, O,
UAir blows out of front and side defrosters and
side registers to defrost windshield. Control Damper Control PositionDamper
PositionOperation
E123517E02

AC–16AIR CONDITIONING – AIR CONDITIONING SYSTEM (for Automatic Air Conditioning Sys-
tem)
AC
The circle size () indicates the proportion of the flow
volume.
Air Outlet ModeAir Outlet Position Symbol
ABCD
Center Face Side Face Foot Defroster
FA C E X X
BI-LEVELX
FOOT X
FOOT/DEF X
DEF X X

AIR CONDITIONING – AIR CONDITIONING SYSTEM (for Automatic Air Conditioning Sys-
tem)AC–17
AC
HOW TO PROCEED WITH
TROUBLESHOOTING
(2005/11-2006/01)
HINT:
• Use these procedures to troubleshoot the air conditioning
system.
• *: Use the intelligent tester.
NEXT
NEXT
Standard voltage:
11 to 14 V
If the voltage is below 11 V, recharge or replace the battery
before proceeding.
NEXT
(a) Use the intelligent tester to check if the CAN
communication system is functioning.
Result
B
A
(a) Check DTCs or sensor check codes.
(1) Write down the DTCs or sensor check codes.
(b) Clear the DTCs or sensor check codes.
(c) Check whether the DTCs or sensor check codes recur.
(1) Reproduce the problem symptoms in accordance
with the DTCs or sensor check codes that were
written down, and check whether the DTCs or
sensor check codes recur.
1VEHICLE BROUGHT TO WORKSHOP
2CUSTOMER PROBLEM ANALYSIS AND SYMPTOM CHECK
3INSPECT BATTERY VOLTAGE
4CHECK CAN COMMUNICATION SYSTEM*
Result Proceed to
CAN DTC is not output A
CAN DTC is output B
Go to CAN COMMUNICATION SYSTEM
5CHECK DTC OR CHECK SENSOR CHECK CODE THROUGH PANEL DIAGNOSIS*

AC–18AIR CONDITIONING – AIR CONDITIONING SYSTEM (for Automatic Air Conditioning Sys-
tem)
AC
HINT:
Refer to the DTC chart when any DTCs or sensor
check codes are output.
Result
B
A
Result
B
A
(a) DATA LIST / ACTIVE TEST (see page AC-34)
(b) Panel diagnosis (indicator check) (see page AC-31)
(c) Panel diagnosis (actuator check) (see page AC-31)
(d) Panel diagnosis (sensor check) (see page AC-31)
(e) Terminals of ECU (see page AC-24)
NEXT
NEXT
NEXT
Result Proceed to
DTC or sensor check code is not
outputA
DTC or sensor check code is output B
Go to step 8
6REFER TO PROBLEM SYMPTOMS TABLE
Result Proceed to
Fault not listed in problem
symptoms tableA
Fault listed in problem symptoms
tableB
Go to step 8
7OVERALL ANALYSIS AND TROUBLESHOOTING*
8ADJUST, REPAIR OR REPLACE
9CONFIRMATION TEST
END