2001 TOYOTA SEQUOIA air conditioning

DI±2356
± DIAGNOSTICSAIR CONDITIONING SYSTEM
2550 Author: Date:
INSPECTION PROCEDURE
1 Actuator check.
PREPARATION:
(a) Warm up the engine.
(b) Set to the actuator check mode (See page DI±2303).
(c) Press the DEF switch and change it to step operation.
CHECK:
Press the DEF switch and check the operation of the air mix damper and the condition of the blower.
OK:
Display CodeAir Mix DamperCondition
0 ± 3±14% (Fully closed)Cool air comes out
4, 550%±
6 ± 9113.5% (Fully opened)Warm air comes out
HINT:
However, if DTC 41 is displayed, replace the integration control and panel.
OK Proceed to next circuit inspection shown in
problem symptoms table (See page DI±2304).
NG

I15902
Cool
Warm
± DIAGNOSTICSAIR CONDITIONING SYSTEM
DI±2357
2551 Author: Date:
2 Check front air mix damper control servomotor.
PREPARATION:
Remove the front air mix servomotor (See page AC±86).
CHECK:
Connect the positive (+) lead to terminal 1 and the negative (±)
lead to terminal 2.
OK:
The lever turns smoothly to the warm side.
CHECK:
Connect the positive (+) lead to terminal 2 and the negative (±)
lead to terminal 1.
OK:
The lever turns smoothly to the cool side.
NG Replace front air mix servomotor.
OK
3 Check harness and connector between front air mix servomotor and integration
control and panel (See page IN±35).
NG Repair or replace harness or connector.
OK
Replace integration control and panel.

I28840
A16 Air Inlet Damper
Control Servomotor
520
8AIR
AIF Integration Control and Panel
G±W
I20
R 4
REC
FRS
I20 DI±2358
± DIAGNOSTICSAIR CONDITIONING SYSTEM
2552 Author: Date:
DTC 42 Air Inlet Damper Control Servomotor Circuit
CIRCUIT DESCRIPTION
The air inlet damper control servomotor is controlled by the integration control and panel and moves the air
inlet damper to the desired position.
DTC No.Detection itemTrouble Area

Air inlet damper control servomotor

Air inlet damper position sensor
42
Air inlet damper position sensor value does not change even if
integration control and panel operated air inlet damper control
servomotor

Harness or connector between air inlet damper control servo-
motor and integration control and panel

Harness or connector between air inlet damperposition sen-servomotor.
Harness or connector between air inlet damper position sen-
sor and integration control and panel

Integration control and panel
WIRING DIAGRAM
DI3FJ±14

± DIAGNOSTICSAIR CONDITIONING SYSTEM
DI±2359
2553 Author: Date:
INSPECTION PROCEDURE
1 Actuator check.
PREPARATION:
(a) Remove the glove compartment door to see and check the air inlet damper operation.
(b) Set to the actuator check mode (See page DI±2303).
(c) Press the DEF switch and change it to step operation.
CHECK:
Press the DEF switch and check the operation of the air inlet damper.
OK:
Display CodeAir Inlet Damper
0 ± 2FRS
3REC/FRS
4 ± 9REC
HINT:
However, if DTC 42 is displayed, replace the integration control and panel.
OK Proceed to next circuit inspection shown in
problem symptoms table (See page DI±2304).
NG

I25201
RECFRS
DI±2360
± DIAGNOSTICSAIR CONDITIONING SYSTEM
2554 Author: Date:
2 Check air inlet damper control servomotor.
PREPARATION:
Remove the air inlet servomotor (See page AC±49).
CHECK:
Connect the positive (+) lead to terminal 4 and the negative (±)
lead to terminal 5.
OK:
The lever moves smoothly to the REC position.
CHECK:
Connect the positive (+) lead to terminal 5 and the negative (±)
lead to terminal 4.
OK:
The lever moves smoothly to the FRS position.
NG Replace air inlet servomotor.
OK
3 Check harness and connector between air inlet servomotor and integration con-
trol and panel (See page IN±35).
NG Repair or replace harness or connector.
OK
Replace integration control and panel.

I28841
Integration Control
and Panel
5
IJ3
I219
RrAMC
RrAMH L±B
BH13
4
R±G R±G A34
A/C Water Valve (Rear)
R±G L±B
28
10 L±B w/ Rear A/C:
7
M.COOL
M.HOTI21 IJ3 BH1
± DIAGNOSTICSAIR CONDITIONING SYSTEM
DI±2361
2555 Author: Date:
2005 SEQUOIA (RM1146U)
DTC 47 Water Valve Damper Control Servomotor
Circuit
CIRCUIT DESCRIPTION
The water valve damper control servomotor is controlled by the integration control and panel and moves the
water valve damper to the desired position.
DTC No.Detection ItemTrouble Area
47
Water valve damper position sensor value does not change
even if integration control and panel operates water valve
damper control servomotor.

Water valve damper control servomotor

Water valve damper position sensor

Harness or connector between water valve damper control
servomotor and integration control and panel

Harness or connector between water valve damper position
sensor and integration control and panel

Integration control and panel
WIRING DIAGRAM
DI936±04

I28853
5
4
WARM
I28854
COOL54
DI±2362
± DIAGNOSTICSAIR CONDITIONING SYSTEM
2556 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION PROCEDURE
1 Check water valve damper control servomotor.
PREPARATION:
Remove the water valve servomotor (See page AC±42).
CHECK:
Connect the positive (+) lead to terminal 5 and the negative (±)
lead to terminal 4.
OK:
The lever turns smoothly to the warm side.
CHECK:
Connect the positive (+) lead to terminal 4 and the negative (±)
lead to terminal 5.
OK:
The lever turns smoothly to the cool side.
NG Replace water valve servomotor.
OK
2 Check harness and connector between water valve servomotor and integration
control and panel (See page IN±35).
NG Repair or replace harness or connector.
OK
Replace integration control and panel.

I28842
Integration Control
and Panel
IG+
Battery15 A GAUGE 3A5
3E2
I19 R±L
B±Y
5I18
Ignition Switch
21AM1
1L
W±L IG1
40 A AM11C 1C 1E
BW 8 F10
Fusible Link BlockW±L R±L
4 7 15
R±L
16Instrument Panel J/B Instrument Panel J/B
I1910
GND
140 A ALT
O
J43 J43J/C
A
A
O 2 1 Sub J/B No. 3
± DIAGNOSTICSAIR CONDITIONING SYSTEM
DI±2363
2557 Author: Date:
2005 SEQUOIA (RM1146U)
IG Power Source Circuit
CIRCUIT DESCRIPTION
This is the power source for the integration control and panel and servomotors, etc.
WIRING DIAGRAM
DI937±04