2007 TOYOTA SIENNA light

AC–34AIR CONDITIONING – AIR CONDITIONING SYSTEM (for Automatic Air Conditioning Sys-
tem)
AC
OK:
The display is as specified in the normal condition
column.
Result
B
C
A
(a) Disconnect the connector from the evaporator
temperature sensor.
(b) Measure the resistance according to the value(s) in the
table below.
Standard resistance
NOTICE:
• Even slightly touching the sensor may change the
resistance value. Be sure to hold the connector of
the sensor.
• When measuring, the sensor temperature must be
the same as the evaporator temperature.
HINT:
As the temperature increases, the resistance decreases
(see the graph).
NG
OK
Result Proceed to
NGA
OK (When troubleshooting according to the PROBLEM SYMPTOMS TABLE) B
OK (When troubleshooting according to the DTC) C
PROCEED TO NEXT CIRCUIT INSPECTION
SHOWN IN PROBLEM SYMPTOMS TABLE
REPLACE A/C AMPLIFIER
2INSPECT EVAPORATOR TEMPERATURE SENSOR
E148014E02
Tester Connection Condition Specified Condition
A12-1 - A12-2 -10
C (14F) 7.30 to 9.10 k
A12-1 - A12-2 -5C (23F) 5.65 to 6.95 k
A12-1 - A12-2 0C (32F) 4.40 to 5.35 k
A12-1 - A12-2 5C (41F) 3.40 to 4.15 k
A12-1 - A12-2 10C (50F) 2.70 to 3.25 k
A12-1 - A12-2 15C (59F) 2.14 to 2.58 k
A12-1 - A12-2 20C (68F) 1.71 to 2.05 k
A12-1 - A12-2 25C (77F) 1.38 to 1.64 k
A12-1 - A12-2 30C (86F) 1.11 to 1.32 k
REPLACE EVAPORATOR TEMPERATURE
SENSOR

AC–38AIR CONDITIONING – AIR CONDITIONING SYSTEM (for Automatic Air Conditioning Sys-
tem)
AC
Standard resistance
NOTICE:
• Even slightly touching the sensor may change the
resistance value. Be sure to hold the connector of
the sensor.
• When measuring, the sensor temperature must be
the same as the rear evaporator temperature.
HINT:
As the temperature increases, the resistance decreases
(see the graph).
NG
OK
I040629E04
Tester Connection Condition Specified Condition
A26-1 - A26-2 -10
C (14F) 7.40 to 9.20 k
A26-1 - A26-2 -5C (23F) 5.65 to 7.00 k
A26-1 - A26-2 0C (32F) 4.35 to 5.40 k
A26-1 - A26-2 5C (41F) 3.40 to 4.20 k
A26-1 - A26-2 10C (50F) 2.68 to 3.30 k
A26-1 - A26-2 15C (59F) 2.10 to 2.60 k
A26-1 - A26-2 20C (68F) 1.66 to 2.10 k
A26-1 - A26-2 25C (77F) 1.32 to 1.66 k
A26-1 - A26-2 30C (86F) 1.05 to 1.35 k
REPLACE REAR EVAPORATOR
TEMPERATURE SENSOR

AC–244AIR CONDITIONING – EVAPORATOR TEMPERATURE SENSOR
AC
EVAPORATOR TEMPERATURE
SENSOR
ON-VEHICLE INSPECTION
1. INSPECT A/C EVAPORATOR TEMPERATURE
SENSOR
(a) Remove the A/C evaporator temperature sensor (A/
C thermistor).
(b) Disconnect the connector from the A/C evaporator
temperature sensor (A/C thermistor).
(c) Measure the resistance according to the value(s) in
the table below.
Standard resistance
NOTICE:
• Even slightly touching the sensor may
change the resistance value. Be sure to hold
the connector of the sensor.
• When measuring, the sensor temperature
must be the same as the ambient
temperature.
HINT:
As the temperature increases, the resistance
decreases (see the graph).
If the resistance is not as specified, replace the A/C
evaporator temperature sensor (A/C thermistor).
E148014E01
Tester connection Condition Specified condition
1 - 2 -10
C (14F) 7.30 to 9.10 k
1 - 2 -5C (23F) 5.65 to 6.95 k
1 - 2 0C (32F) 4.40 to 5.35 k
1 - 2 5C (41F) 3.40 to 4.15 k
1 - 2 10C (50F) 2.70 to 3.25 k
1 - 2 15C (59F) 2.14 to 2.58 k
1 - 2 20C (68F) 1.71 to 2.05 k
1 - 2 25C (77F) 1.38 to 1.64 k
1 - 2 30C (86F) 1.11 to 1.32 k

RS–18SUPPLEMENTAL RESTRAINT SYSTEM – AIRBAG SYSTEM
RS
(5) Diagnostic circuit
• This circuit constantly diagnoses system
malfunctions. When a malfunction is
detected, it lights up the SRS warning light on
the combination meter assembly to inform the
driver.
(6) Memory circuit
• When a malfunction is detected in the
diagnostic circuit, it is coded and stored in the
memory circuit.
(e) SRS WARNING LIGHT
(1) The SRS warning light is located on the
combination meter assembly. It comes on to
inform the driver of system trouble when a
malfunction is detected in self-diagnosis of the
center airbag sensor assembly. Under normal
operating conditions, when the ignition switch is
turned to the ON position, it comes on for
approximately 6 seconds and then goes off.

SUPPLEMENTAL RESTRAINT SYSTEM – AIRBAG SYSTEMRS–23
RS
B
A
(a) Proceed to Diagnosis System (See page RS-27).
NEXT
(a) Proceed to DTC Check / Clear (See page RS-35).
Result:
B
A
(a) Proceed to Diagnostic Trouble Code Chart (See page
RS-39).
NEXT
(a) Proceed to Diagnosis System (See page RS-27).
NEXT
(a) Proceed to Problem Symptoms Table (See page RS-23).
NEXT
The CAN communication system is not
functioning normally.B
INSPECT CAN COMMUNICATION CIRCUIT
Result Proceed to
5SRS WARNING LIGHT CHECK
6CHECK FOR DTC*
Result Proceed to
DTC is output. A
DTC is not output. B
GO TO STEP 8
7DIAGNOSTIC TROUBLE CODE CHART
GO TO STEP 10
8SYMPTOM SIMULATION
9PROBLEM SYMPTOMS TABLE