2001 TOYOTA SEQUOIA wiring diagram

I28481
Radio and Navigation Assy
P1
Park/Neutral Position Switch
Instrument Panel J/BREV
IG4J/C
J51 J52
From Ignition
SwitchR29
IPORAD No. 2
1D 1CRB
RL L±R B±Y5 FH
L±R B±Y
L±R7
1
8
6 9
1 2 DI±2294
± DIAGNOSTICSNAVIGATION SYSTEM
2488 Author: Date:
2005 SEQUOIA (RM1146U)
Reverse signal circuit
CIRCUIT DESCRIPTION
The radio and navigation assy receives the reverse signal from the park/neutral position switch and informa-
tion about the GPS antenna, and then adjusts the vehicle position.
WIRING DIAGRAM
DIDDQ±01

DIDKT±01
I25617
A14
A/C Room Temp.
Sensor (Front)
2 1
R±W
SG±TR TR Integration Control and Panel
3
L±W
I20
1
I20
± DIAGNOSTICSAIR CONDITIONING SYSTEM
DI±2319
2513 Author: Date:
2005 SEQUOIA (RM1146U)
CIRCUIT INSPECTION
DTC 11 Front Room Temperature Sensor Circuit
CIRCUIT DESCRIPTION
This sensor detects the temperature inside the cabin and sends the appropriate signals to the integration
control and panel.
DTC No.Detection ItemTrouble Area
11Open or short in front room temperature sensor circuit.

Front room temp. sensor

Harness or connector between front room temp. sensor and
integration control and panel

Integration control and panel
WIRING DIAGRAM

I28832
SG±TAM Integration Control
and Panel
20
12
I19 Y±B
IA5
13 A1
A/C Ambient
Temp. SensorY±B
8
TA M LG±B LG±B 1
2
I19 IA5Y±BJ/C
J14 CA
J15 DI±2322
± DIAGNOSTICSAIR CONDITIONING SYSTEM
2516 Author: Date:
2005 SEQUOIA (RM1146U)
DTC 12 Ambient Temperature Sensor Circuit
CIRCUIT DESCRIPTION
This sensor detects the ambient temperature and sends the appropriate signals to the integration control
and panel.
DTC No.Detection ItemTrouble Area
12Open or short in ambient temperature sensor circuit.

Ambient temp. sensor

Harness or connector between ambient temp. sensor and
integration control and panel

Integration control and panel
WIRING DIAGRAM
DIDKU±01

I28833
A13
A/C Evaporator
Temp. Sensor
(Front)
12
2 Integration Control and Panel
TE
SG±TE W±GG±B4
I20
I20
± DIAGNOSTICSAIR CONDITIONING SYSTEM
DI±2325
2519 Author: Date:
2005 SEQUOIA (RM1146U)
DTC 13 Front Evaporator Temperature Sensor Cir-
cuit
CIRCUIT DESCRIPTION
This sensor detects the temperature inside the cooling unit and sends the appropriate signals to the integra-
tion control and panel.
DTC No.Detection ItemTrouble Area
13Open or short in front evaporator temperature sensor circuit.

Front evaporator temp. sensor

Harness or connector between front evaporator temp. sensor
and integration control and panel

Integration control and panel
WIRING DIAGRAM
DIDKV±01

I08286
E2
Engine Coolant
Temp. Sensor
1 2Integration Control and Panel
I22 E821
28
E8E2 THWECM
THWO
E5 14
W±R2 G±Y
G±WTW DI±2328
± DIAGNOSTICSAIR CONDITIONING SYSTEM
2522 Author: Date:
2005 SEQUOIA (RM1146U)
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 ItemTrouble Area
14Open 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

I15861
Integration Control and Panel
A29
A/C Evaporator Temp.
Sensor (Rear)I21
RrTE 17
LG±R
BH18
1
2
1
L±R
L±R10
RrSG 18
IJ3
6 LG±R
BH1 LG±R w/ Rear A/C:
L±R
IJ3
I21 DI±2330
± DIAGNOSTICSAIR CONDITIONING SYSTEM
2524 Author: Date:
2005 SEQUOIA (RM1146U)
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 ItemTrouble Area
17Open 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

I24455
A31
A/C Room Temp.
Sensor (Rear)
2
SG±RrTRRrTR Integration Control and Panel
14 13
I22
I22 GR±R B
1 w/ Rear A/C:
GR±R
R±Y R±YJ31
E J32F
AJ/C
J31 J32
± DIAGNOSTICSAIR CONDITIONING SYSTEM
DI±2333
2527 Author: Date:
2005 SEQUOIA (RM1146U)
DTC 19 Rear Room Temperature Sensor Circuit
CIRCUIT DESCRIPTION
This sensor detects the temperature inside the cabin and sends the appropriate signals to the integration
control and panel.
DTC No.Detection ItemTrouble Area
19Open or short in rear room temperature sensor circuit.

Rear room temp. sensor

Harness or connector between rear room temp. sensor and
integration control and panel

Integration control and panel
WIRING DIAGRAM
DIDKX±01

Resistance of photo diode
High
Low
Weak
Strong
Strength of solar radiation
I28834
A15
Solar
Sensor
TS 21 Integration Control and Panel
14S5±TS
I20 B
LG 1
2
I20 DI±2336
± DIAGNOSTICSAIR CONDITIONING SYSTEM
2530 Author: Date:
2005 SEQUOIA (RM1146U)
DTC 21 Solar Sensor Circuit
CIRCUIT DESCRIPTION
A photo diode in the solar sensor detects solar radiation and
sends signals to the integration control and panel.
DTC NoDetection ItemTrouble Area
21
Open or short in solar sensor circuit.
Note that output of diagnostic trouble code 21 is not abnormal
when the sensor is not receiving solar radiation.
Solar sensor

Harness or connector between solar sensor and integration
control and panel

Integration control and panel
WIRING DIAGRAM
DI3FB±11