2001 TOYOTA SEQUOIA Page 18

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.

± 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.

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.

I28847
IG+ GNDI19 Integration Control and Panel:
I28847
GNDI19 Integration Control and Panel:
DI±2364
± DIAGNOSTICSAIR CONDITIONING SYSTEM
2558 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION PROCEDURE
1 Check voltage between terminals IG+ and GND of integration control and panel.
PREPARATION:
(a) Remove the integration control and panel with connec-
tors still connected (See page AC±103).
(b) Turn the ignition switch to ON.
CHECK:
Measure the voltage between terminals IG+ and GND of the in-
tegration control and panel.
OK:
Voltage : 10 to 14 V
OK Proceed to next circuit inspection shown in
problem symptoms table (See page DI±2304).
NG
2 Check continuity between terminal GND of integration control and panel and
body ground.
PREPARATION:
Turn the ignition switch to LOCK.
CHECK:
Measure the resistance between terminal GND of the A/C con-
trol assembly and body ground.
OK:
Resistance : Below 1 W
NG Repair or replace harness or connector.
OK

I15901
GAUGE Fuse Instrument panel J/B
± DIAGNOSTICSAIR CONDITIONING SYSTEM
DI±2365
2559 Author: Date:
2005 SEQUOIA (RM1146U)
3 Check GAUGE fuse.
PREPARATION:
Remove the GAUGE fuse from the instrument panel J/B.
CHECK:
Check continuity of the GAUGE fuse.
OK:
Continuity exists.
NG Check for shot in all the harness and compo-
nents connected to the GAUGE fuse (See page
IN±35).
OK
Check and repair harness and connector between integration control and panel and battery.

I28847
+B I19 Integration Control and Panel:
I22575
DOME Fuse Engine Room J/B
± DIAGNOSTICSAIR CONDITIONING SYSTEM
DI±2367
2561 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION PROCEDURE
1 Check voltage between terminal +B of integration control and panel and body
ground.
PREPARATION:
Remove the integration control and panel with connectors still
connected.
CHECK:
Measure the voltage between terminal +B of the integration
control and panel and body ground.
OK:
Voltage : 10 to 14 V
OK Proceed to next circuit inspection shown in
problem symptoms table (See page DI±2304).
NG
2 Check DOME fuse.
PREPARATION:
Remove the DOME fuse from the engine room J/B.
CHECK:
Check continuity of the DOME fuse.
OK:
Continuity
NG Check for short in all the harness and compo-
nents connected to the DOME fuse (See at-
tached wiring diagram).
OK
Check and repair harness and connector between integration control and panel and battery.