sensor TOYOTA RAV4 2006 Service Repair Manual

AIR CONDITIONING – AIR CONDITIONING SYSTEM (for Automatic Air Conditioning Sys-
tem)AC–29
AC
TERMINALS OF ECU
(2006/01- )
1. CHECK AIR CONDITIONING AMPLIFIER
(a) Measure the voltage and resistance of the
connectors.
HINT:
Check from the rear of the connector while it is
connected to the air conditioning amplifier.
E115964E03
Symbols (Terminal No.) Wiring Color Terminal Description ConditionSpecified Condition
B (E37-21) - GND (E37-
14)R - W-B Power source (Back-up) Always 10 to 14 V
SOL+ (E37-2) - GND
(E37-14)GR - W-BA/C compressor operation
signalEngine idling
Pulse generation
(see waveform 1) Blower switch LO
A/C switch ON
BLW (E37-23) - GND
(E37-14)R - W-BBlower motor control
signalIgnition switch ON
Pulse generation
(see waveform 2)
Blower switch LO
PRE (E37-9) - SG-2 (E37-
13)L - GAir conditioning pressure
sensor signalRefrigerant pressure:
Normal0.76 to 4.74 V
PRE (E37-9) - SG-2 (E37-
13)L - GAir conditioning pressure
sensor signalRefrigerant pressure:
Abnormal (less than 0.196
MPa [2.0 kgf/cm
2, 28 psi]) Below 0.76 V
PRE (E37-9) - SG-2 (E37-
13)L - GAir conditioning pressure
sensor signalRefrigerant pressure:
Abnormal (more than 3.14
MPa [32 kgf/cm
2, 455 psi])4.74 V or higher
TSD (E37-33) - S5-4 (E37-
31)L - LGDriver side solar sensor
signalIgnition switch ON
0.8 to 4.3 V
Solar sensor subject to
electric light
TSP (E37-32) - S5-4 (E37-
31)P - LGPassenger side solar
sensor signalIgnition switch ON
0.8 to 4.3 V
Solar sensor subject to
electric light
TR (E37-29) - SG-1 (E37-
34)CR - VRoom temperature sensor
signalIgnition switch ON
1.8 to 2.2 V
Vehicle interior
temperature: 25
C (77F)
SG-1 (E37-34) - Body
groundV - Body groundGround for room
temperature sensorAlways Below 1
GND (E37-14) - Body
groundW-B - Body groundGround for main power
supplyAlways Below 1
IG+ (E37-1) - GND (E37-
14)Y - W-B Power source (IG) Ignition switch ON 10 to 14 V
S5-3 (E37-10) - GND
(E37-14)B - W-BPower supply for pressure
sensorIgnition switch ON 4.5 to 5.5 V
CANH (E37-11) - GND
(E37-14)V - W-B Hi-level CAN bus line Ignition switch ONPulse generation
(see waveform 3)

AC–30AIR CONDITIONING – AIR CONDITIONING SYSTEM (for Automatic Air Conditioning Sys-
tem)
AC
HINT:
*: for 2GR-FE
(b) Using an oscilloscope, check waveform 1.
A/C Compressor* operation signal
HINT:
*: Compressor and pulley for 2AZ-FE, Compressor
and magnetic clutch for 2GR-FE.
(c) Using an oscilloscope, check waveform 2.
Blower motor control signal
HINT:
When the blower level is increased, the duty ratio
changes accordingly.
CANL (E37-12) - GND
(E37-14)W - W-B Lo-level CAN bus line Ignition switch ONPulse generation
(see waveform 4)
SG-2 (E37-13) - Body
groundG - Body groundGround for pressure
sensorAlways Below 1
RDFG (E37-38) - GND
(E37-14)B - W-BRear defogger switch
signalIgnition switch ON
Rear defogger switch OFF10 to 14 V
RDFG (E37-38) - GND
(E37-14)B - W-BRear defogger switch
signalIgnition switch ON
Rear defogger switch ONBelow 1 V
LIN1 (E37-37) - GND
(E37-14)B - W-B LIN communication signal Ignition switch ON Pulse generation
BUS G (c1-2) - Body
ground- Ground for BUS IC Always Below 1
BUS (c1-3) - BUS G (c1-2) - BUS IC control signal Ignition switch ON Pulse generation
B BUS (c1-4) - BUS G (c1-
2)- Power supply for BUS IC Ignition switch ON 11 to 13 V
SGA (c1-5) - Body ground -Ground for evaporator
temperature sensorAlways Below 1
TEA (c1-6) - SGA (c1-5) -Evaporator temperature
sensor signalIgnition switch ON
1.4 to 1.8 V
Evaporator temperature:
15
C (59F)
LOCK (E37-8)* - SG-2
(E37-13)W - GCompressor lock sensor
signalIgnition switch ON
AUTO switch ON
A/C switch ON
Magnetic clutch ONPulse generation
(see waveform 5)
MGC (E37-20)* - GND
(E37-14)V - W-BMagnetic clutch relay
signalIgnition switch ON
Magnetic clutch OFF10 to 14 V
MGC (E37-20)* - GND
(E37-14)V - W-BMagnetic clutch relay
signalIgnition switch ON
Magnetic clutch ONBelow 1.5 V Symbols (Terminal No.) Wiring Color Terminal Description ConditionSpecified Condition
E074977E11
Item Content
Symbols (Terminal No.) SOL+ (E37-2) - GND (E37-14)
Tool Setting 5 V/DIV., 500
sec./DIV.
ConditionEngine idling, Blower switch LO, A/C
switch ON
E103396E05
Item Content
Symbols (Terminal No.) BLW (E37-23) - GND (E37-14)
Tool Setting 1 V/DIV., 500
sec./DIV.
Condition Ignition switch ON, Blower switch LO

AIR CONDITIONING – AIR CONDITIONING SYSTEM (for Automatic Air Conditioning Sys-
tem)AC–31
AC
(d) Using an oscilloscope, check waveform 3.
CAN communication signal
HINT:
The waveform varies depending on the CAN
communication signal.
(e) Using an oscilloscope, check waveform 4.
CAN communication signal
HINT:
The waveform varies depending on the CAN
communication signal.
(f) Using an oscilloscope, check waveform 5.
Compressor lock sensor signal*
HINT:
*: for 2GR-FE
2. CHECK AIR CONDITIONING CONTROL
(a) Measure the voltage and resistance of the
connectors.
A086154E10
Item Content
Symbols (Terminal No.) CANH (E37-11) - GND (E37-14)
Tool Setting 1 V/DIV., 10
sec./DIV.
Condition Ignition switch ON
A086155E11
Item Content
Symbols (Terminal No.) CANL (E37-12) - GND (E37-14)
Tool Setting 1 V/DIV., 10
sec./DIV.
Condition Ignition switch ON
E127551E01
Item Content
Symbols (Terminal No.) LOCK (E37-8)* - SG-2 (E37-13)
Tool Setting 500 mV/DIV., 20 msec./DIV.
ConditionIgnition switch ON, AUTO switch ON, A/
C switch ON, Magnetic clutch ON
E123518E01
Symbols (Terminal No.) Wiring Color Terminal Description ConditionSpecified Condition
IG+ (E23-2) - GND (E23-
7)L - W-B Power source (IG) Ignition switch ON 10 to 14 V
GND (E23-7) - Body
groundW-B - Body groundGround for air conditioning
control assemblyAlways Below 1
LIN1 (E23-11) - GND
(E23-7)B - W-B LIN communication signalIgnition switch ON Pulse generation
+B (E23-1) - GND (E23-7) R - W-B Power source (Back-up) Always 10 to 14 V

AIR CONDITIONING – ROOM TEMPERATURE SENSOR (for Automatic Air Conditioning
System)AC–231
AC
INSTALLATION
1. INSTALL ROOM TEMPERATURE SENSOR
(a) Attach the claws to install the sensor.
(b) Connect the connector.
(c) Connect the duct.
2. INSTALL LOWER INSTRUMENT PANEL
(a) Install the lower instrument panel (see page IP-23).

AIR CONDITIONING – AMBIENT TEMPERATURE SENSOR (for Automatic Air Conditioning
System)AC–233
AC
INSTALLATION
1. INSTALL AMBIENT TEMPERATURE SENSOR
(a) Connect the connector, and then push in the sensor.
2. INSTALL FRONT BUMPER COVER
(a) Install the front bumper cover (see page ET-10).
3. CONNECT CABLE TO NEGATIVE BATTERY
TERMINAL
4. CHECK SRS WARNING LIGHT
(a) Check SRS warning light (see page RS-37).

AIR CONDITIONING – SOLAR SENSOR (for Automatic Air Conditioning System)AC–237
AC
INSTALLATION
1. INSTALL SOLAR SENSOR
(a) Connect the connector, and then push in the solar
sensor.
2. CONNECT CABLE TO NEGATIVE BATTERY
TERMINAL
3. CHECK SRS WARNING LIGHT
(a) Check the SRS warning light (see page RS-37).

SUPPLEMENTAL RESTRAINT SYSTEM – AIRBAG SYSTEMRS–25
RS
SYSTEM DESCRIPTION
1. GENERAL
(a) In conjunction with an impact absorbing structure for
a frontal collision, the SRS (Supplemental Restraint
System) driver airbag, front passenger airbag and
driver side knee airbag were designed to
supplement seat belts in the event of a frontal
collision in order to help reduce shock to the head,
chest and knee of the driver and front passenger.
This system is a 3-sensor type airbag system to
detect the impact during a frontal collision using the
center airbag sensor and front airbag sensors. It
also operates the airbag system and seat belt
pretensioner.
(b) In order to detect the extent of the collision during
the initial stages of the collision in further detail, the
front airbag sensors have been changed from
mechanical type to electrical type deceleration
sensors. Accordingly, the deployment of the driver
airbag and front passenger airbag is controlled in
two stages according to the severity of the impact.
(c) In conjunction with an impact absorbing structure for
a side collision, the side airbag and curtain shield
airbag were designed to help reduce shock to the
driver and front passenger in the event of a side
collision.
(d) A curtain shield airbag that helps reduce shock to
the front and rear seat occupants with a single
curtain shield airbag has been adopted. In
conjunction with this system, the side airbag
sensors have been installed at the bottom of the
center pillars and rear airbag sensors have been
installed at the bottom of the rear pillars.
(e) In this system, a front side collision is detected by
the side airbag sensor in order to simultaneously
deploy the side airbag. A rear side collision is
detected by the rear airbag sensor and the center
airbag sensor in order to deploy the side airbag and
curtain shield airbag.
(f) The center airbag sensor sends the airbag
deployment signal to the ECM through the CAN
(Controller Area Network) to operate the fuel pump
control.
2. CONSTRUCTION AND OPERATION
(a) FRONT AIRBAG SENSOR
(1) The front airbag sensors are installed on the
right and left radiator supports.
(2) The front airbag sensor consists of the
deceleration sensor.

RS–26SUPPLEMENTAL RESTRAINT SYSTEM – AIRBAG SYSTEM
RS
(3) The deceleration sensor is built into the front
airbag sensor, and the distortion that is created
in the sensor is converted into an electric signal
based on the vehicle deceleration rate during a
frontal collision. Accordingly, the extent of the
initial collision can be detected in detail.
(b) SIDE AIRBAG SENSOR
(1) The side airbag sensors are installed on the
bottom of the right and left center pillars.
(2) The side airbag sensor consists of the
deceleration sensor and ignition control circuit.
(3) The deceleration sensor is built into the side
airbag sensor, and the distortion that is created
in the sensor is converted into an electric signal
based on the vehicle deceleration rate during a
front side collision. Accordingly, the extent of the
initial collision can be detected in detail.
(c) REAR AIRBAG SENSOR
(1) The rear airbag sensors are installed on the right
and left rear pillars.
(2) The rear airbag sensor consists of the
deceleration sensor and ignition control circuit.
(3) The deceleration sensor is built into the rear
airbag sensor, and the distortion that is created
in the sensor is converted into an electric signal
based on the vehicle deceleration rate during a
rear side collision. Accordingly, the extent of the
initial collision can be detected in detail.
(d) CENTER AIRBAG SENSOR
(1) General
• The center airbag sensor is installed on the
center floor under the console box.
• The center airbag sensor consists of the
deceleration sensor, safing sensor, electronic
safing sensor, ignition control circuit and
diagnostic circuit.
• The center airbag sensor receives signals
from the deceleration sensor and safing
sensor built into the center airbag sensor and
front airbag sensor. Then the center airbag
sensor determines whether or not the driver
airbag, front passenger airbag, driver side
knee airbag and seat belt pretensioner should
be activated, and diagnoses system
malfunctions.
• The center airbag sensor causes the side
airbag and the curtain shield airbag to deploy
when receiving signals from the side and rear
airbag sensor.

SUPPLEMENTAL RESTRAINT SYSTEM – AIRBAG SYSTEMRS–27
RS
• The center airbag sensor receives signals
from the deceleration sensor and the
electronic safing sensor built into the center
airbag sensor and the rear airbag sensor, and
determines whether or not the side airbag
and curtain shield airbag should be activated,
and diagnoses system malfunctions.
• The center airbag sensor sends the airbag
deployment signal to ECM through the CAN
to operate the fuel pump control.
(2) Deceleration sensor and ignition control circuit
• The deceleration sensor is built into the
center airbag sensor.
• The ignition control circuit performs
calculations based on the signal output from
the deceleration sensors of the center airbag
sensor and front airbag sensor. If the
calculated values are greater than the
specified values, it activates the deployment
operation.
(3) Safing sensor
The safing sensor is built into the center airbag
sensor. During a frontal collision, the sensor
turns on and outputs an ON signal to the center
airbag sensor if a deceleration rate greater than
the specified value is applied to the safing
sensor.
(4) Electronic safing sensor
The electronic safing sensor is built into the
center airbag sensor. During a side collision, the
sensor turns on and outputs an ON signal to the
center airbag sensor if a deceleration rate
greater than the specified value is applied to the
electronic safing sensor.
(5) Back-up power source
The back-up power source consists of a power
supply capacitor and a DC-DC converter. When
the power system does not function during a
collision, the power supply capacitor discharges
and supplies electric power to the system. The
DC-DC converter operates as a boosting
transformer when the battery voltage falls below
a predetermined level.
(6) Diagnostic circuit
This circuit constantly diagnoses system
malfunctions. When a malfunction is detected, it
lights up the SRS warning light on the telltale
light to inform the driver.
(7) Memory circuit
When a malfunction is detected in the diagnostic
circuit, it is coded and stored in the memory
circuit.

RS–28SUPPLEMENTAL RESTRAINT SYSTEM – AIRBAG SYSTEM
RS
(e) SRS WARNING LIGHT
(1) The SRS warning light is located on the telltale
light. It comes on to inform the driver of system
trouble when a malfunction is detected in the
self-diagnosis of the center airbag sensor. Under
normal operating conditions when the ignition
switch is turned on, it comes on for
approximately 6 seconds and then goes off.
3. DEPLOYMENT CONDITION
When the vehicle collides and the shock is greater than
the specified value, the SRS is activated automatically.
The center airbag sensor includes the safing sensor and
deceleration sensor. The safing sensor was designed to
be turned on at a smaller deceleration rate than the
deceleration sensor.
(a) The center airbag sensor determines whether or not
deployment is necessary based on signals from the
deceleration sensor and the front airbag sensor*. If
the safing sensor turns on simultaneously, current
flows to the squibs to deploy the SRS as shown in
the illustration below.
C109526E06