Toyota Sequoia (2005). Manual — part 633
N16207
Thermometer
Ice
More than
10 cm (3.94in.)
1
2
I28971
Temperature
Resistance (k
Ω
)
9.0
10.0
8.0
5.0
7.0
4.0
2.0
3.0
0.0
14
32
50
68
86
–10
0
10
20
30
(
F)
(
C)
6.0
1.0
–
DIAGNOSTICS
AIR CONDITIONING SYSTEM
DI–2327
2521
2
Check front evaporator temperature sensor.
PREPARATION:
Remove the front evaporator temperature sensor.
CHECK:
Measure the resistance between terminals 1 and 2 of the evap-
orator temperature sensor connector at each temperature.
OK:
Tester connection
Condition
Specified condition
1–2
–10
C (14
F)
7.40 to 9.20 k
Ω
1–2
–5
C (23
F)
5.65 to 7.00 k
Ω
1–2
0
C (32
F)
4.35 to 5.40 k
Ω
1–2
5
C (41
F)
3.40 to 4.20 k
Ω
1–2
10
C (50
F)
2.68 to 3.30 k
Ω
1–2
15
C (59
F)
2.10 to 2.60 k
Ω
1–2
20
C (68
F)
1.66 to 2.10 k
Ω
1–2
25
C (77
F)
1.32 to 1.66 k
Ω
1–2
30
C (86
F)
1.05 to 1.35 k
Ω
NOTICE:
Even slightly touching the sensor may change the re-
sistance 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 on the left).
NG
Replace front evaporator temperature sensor.
OK
3
Check harness and connector between front evaporator temperature sensor and
integration control and panel (See page
NG
Repair or replace harness or connector.
OK
Replace integration control and panel.
I08286
E2
Engine Coolant
Temp. Sensor
1
2
Integration Control and Panel
I22
E8
21
28
E8
E2
THW
ECM
THWO
E5
14
W–R
2
G–Y
G–W
TW
DI–2328
–
DIAGNOSTICS
AIR CONDITIONING SYSTEM
2522
DTC
14
Engine Coolant Temperature Sensor Circuit
CIRCUIT DESCRIPTION
This sensor detects the engine coolant temperature and sends the appropriate signals to the integration
control and panel. These signals are used for warm up control when the engine is cold.
DTC No.
Detection Item
Trouble Area
14
Open or short in engine coolant temperature sensor circuit.
Engine coolant temp. sensor
Harness or connector between engine coolant temp. sensor
and ECM
Harness or connector between ECM and integration control
and panel
ECM
Integration control and panel
WIRING DIAGRAM
DI935–03
–
DIAGNOSTICS
AIR CONDITIONING SYSTEM
DI–2329
2523
INSPECTION PROCEDURE
1
Is DTC P0115, P0117 or P0118 output?
YES
Go to engine troubleshooting
(See page
).
NO
2
Check harness and connector between ECM and integration control and panel.
NG
Repair or replace harness or connector.
OK
Replace integration control and panel.
I15861
Integration Control and Panel
A29
A/C Evaporator Temp.
Sensor (Rear)
I21
RrTE
17
LG–R
BH1
8
1
2
1
L–R
L–R
10
RrSG
18
IJ3
6
LG–R
BH1
LG–R
w/ Rear A/C:
L–R
IJ3
I21
DI–2330
–
DIAGNOSTICS
AIR CONDITIONING SYSTEM
2524
DTC
17
Rear Evaporator Temperature Sensor Circuit
CIRCUIT DESCRIPTION
This sensor detects the rear evaporator temperature and sends the appropriate signals to the integration
control and panel.
DTC No.
Detection Item
Trouble Area
17
Open or short in rear evaporator temperature sensor circuit.
Rear evaporator temp. sensor
Harness or connector between rear evaporator temp. sensor
and integration control and panel
Integration control and panel
WIRING DIAGRAM
DIDKW–01
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