Toyota Sequoia (2005). Manual - part 627

DIDKO–01

I15897

R/F SW

I15897

DEF. SW

STEP

1

2

3

4

5

6

7

8

9

10

DISPLAY
CODE

Fr
BLOWER
LEVEL

Fr
OUTLET

INLET

COMPRESSOR

Fr A/M
DAMPER

Rr
BLOWER
LEVEL

Rr
OUTLET

Rr A/M
DAMPER

1

2

3

4

5

6

7

8

9

0

1

0

16

31

FACE

B/L

FOOT

F/D

DEF

FRS

R/F (50%)

REC

OFF

ON

–14%

50.0%

113.5%

1

0

10

31

FACE1

FACE2

B/L1

B/L2

FOOT

0.0%

40.0%

60.0%

86.5%

–

DIAGNOSTICS

AIR CONDITIONING SYSTEM

DI–2303

2497

ACTUATOR CHECK

1.

ACTUATOR CHECK

(a)

After entering the sensor check mode, press the R/F
switch (See page 

DI–2312

).

(b)

Since each damper, motor and relay automatically oper-
ates at 1 second intervals beginning in order from 20 in
the temperature display, check the temperature and air
flow visually and by hand.
If a slower display is desired, press the DEF. (Fr.) switch
and change it to step operation.  Each time the DEF. (Fr.)
switch is pressed, the display changes by 1 step.

HINT:

Codes are displayed in order from the smallest to the larg-
est numbers.

To cancel the check mode, press the OFF switch.

DI3F3–10

DI–2304

–

DIAGNOSTICS

AIR CONDITIONING SYSTEM

2498

PROBLEM SYMPTOMS TABLE

Front A/C:

Symptom

Suspected Area

See page

Whole functions of the A/C system do not operate

4. Integration control and panel

5. IG power source circuit

IN–35

DI–2363

Air Flow Control: No blower operation

1. IG power source circuit

2. Heater main relay

3. Blower motor circuit

4. Integration control and panel

5. Blower motor controller

DI–2363

AC–95

DI–2374

IN–35

AC–83

Air Flow Control: No blower control

1. Blower motor circuit

2. Integration control and panel

3. Solar sensor circuit

4. Blower motor controller

DI–2374

IN–35

DI–2336

AC–83

Air Flow Control: Insufficient air flow

1. Blower motor circuit

DI–2374

Temperature Control: No cool air comes out

1. Refrigerant volume

2. Drive belt tension

3. Refrigeration system inspection with manifold gauge set

4. Compressor circuit

5. Pressure switch circuit

6. Front air mix damper position sensor circuit

7. Front air mix damper control servomotor circuit

8. Front room temp. sensor circuit

9. Ambient temp. sensor circuit

10.Vehicle speed signal circuit

11.Integration control and panel

AC–23

AC–15

AC–3

DI–2381

DI–2342

DI–2346

DI–2355

DI–2319

DI–2322

DI–2370

IN–35

Temperature Control: No warm air comes out

1. Front air mix damper position sensor circuit

2. Front air mix damper control servomotor circuit

3. Front room temp. sensor circuit

4. Ambient temp. sensor circuit

5. Vehicle speed signal circuit

6. Front evaporator temp. sensor circuit

7. Integration control and panel

DI–2346

DI–2355

DI–2319

DI–2322

DI–2370

DI–2325

IN–35

Temperature Control: Output air is warmer or cooler than the set

temperature or response is slow

1. Refrigerant volume

2. Drive belt tension

3. Refrigeration system inspection with manifold gauge set

4. Cooling fan system

5. Solar sensor circuit

6. Front room temp. sensor circuit

7. Ambient temp. sensor circuit

8. Vehicle speed signal circuit

9. Front evaporator temp. sensor circuit

10.Front air mix damper position sensor circuit

11.Front air mix damper control servomotor circuit

12.Front air inlet damper position sensor circuit

13.Front air inlet damper control servomotor circuit

14.Condenser

15.Evaporator

16.Heater radiator

17.Expansion valve

18.Integration control and panel

AC–23

AC–15

AC–3

AC–96

DI–2336

DI–2319

DI–2322

DI–2370

DI–2325

DI–2346

DI–2355

DI–2349

DI–2358

AC–65

AC–24

AC–35

AC–29

IN–35

–

DIAGNOSTICS

AIR CONDITIONING SYSTEM

DI–2305

2499

Symptom

Suspected Area

See page

Temperature Control: No temperature control (only Max. cool or

Max. warm)

1. Front room temp. sensor circuit

2. Ambient temp. sensor circuit

3. Front air mix damper position sensor circuit

4. Front air mix damper control servomotor circuit

5. Integration control and panel

DI–2319

DI–2322

DI–2346

DI–2355

IN–35

No air inlet control

1. Front air inlet damper position sensor circuit

2. Front air inlet damper control servomotor circuit

3. Integration control and panel

DI–2349

DI–2358

IN–35

No air flow control

1. Air outlet damper position sensor circuit

2. Air outlet damper control servomotor circuit

3. Integration control and panel

AC–35

AC–35

IN–35

Engine idle up does not occur, or is continuous

1. Compressor circuit

2. ECM

DI–2381

DI–34

No DTC is recorded. Set mode is cleared when IG switch is

turned off.

1. Back–up power source circuit

2. Integration control and panel

DI–2366

IN–35

Rear A/C:

Symptom

Suspected Area

See page

Whole functions of the rear A/C system do not operate

1. Heater control assembly

2. Integration control and panel

3. ACC power source circuit

IN–35

DI–2368

DI–2368

Air Flow Control: No blower operation

1. ACC power source circuit

2. Rear heater main relay

3. Rear blower motor

4. Rear blower motor controller

5. Heater control assembly

6. Integration control and panel

DI–2368

AC–95

AC–45

–

IN–35

DI–2368

Air Flow Control: No blower control

1. Rear heater main relay

2. Rear blower motor

3. Rear blower motor controller

4. Heater control assembly

5. Integration control and panel

6. Solar sensor circuit

AC–95

AC–45

–

IN–35

DI–2336

DI–2368

Air Flow Control: Insufficient air flow

1. Rear blower motor

2. Rear blower resister

AC–45

–

Temperature Control: No cool air comes out

1. Refrigerant volume

2. Drive belt tension

3. Refrigeration system inspection with manifold gauge set

4. Compressor circuit

5. Pressure switch circuit

6. Water valve damper position sensor circuit

7. Water valve damper control servomotor circuit

8. Rear room temp. sensor circuit

9. Ambient temp. sensor circuit

10.ECM

11.Heater control assembly

12.Integration control and panel

AC–23

AC–15

AC–3

DI–2381

DI–2342

DI–2352

DI–2361

DI–2333

DI–2322

DI–34

DI–2368

IN–35

Temperature Control: No warm air comes out

1. Water valve damper position sensor circuit

2. Water valve damper control servomotor circuit

3. Rear room temp. sensor circuit

4. Ambient temp. sensor circuit

5. Rear evaporator temp. sensor circuit

6. Heater control assembly

7. Integration control and panel

DI–2352

DI–2361

DI–2333

DI–2322

DI–2330

IN–35

IN–35

DI–2306

–

DIAGNOSTICS

AIR CONDITIONING SYSTEM

2500

Temperature Control: Output air is warmer or cooler than the set

temperature or response is slow

1. Refrigerant volume

2. Drive belt tension

3. Refrigeration system inspection with manifold gauge set

4. Cooling fan system

5. Solar sensor circuit

6. Rear room temp. sensor circuit

7. Ambient temp. sensor circuit

8. Rear evaporator temp. sensor circuit

9. Water valve damper position sensor circuit

10.Water valve damper control servomotor circuit

11.Condenser

12.Evaporator

13.Heater radiator

14.Expansion valve

15.Heater control assembly

16.Integration control and panel

AC–23

AC–15

AC–3

AC–96

DI–2336

DI–2333

DI–2322

DI–2330

DI–2352

DI–2361

AC–65

AC–70

AC–45

AC–76

IN–35

IN–35

Temperature Control: No temperature control (only Max. cool or

Max. warm)

1. Rear room temp. sensor circuit

2. Ambient temp. sensor circuit

3. Water valve damper position sensor circuit

4. Water valve damper control servomotor circuit

5. Heater control assembly

6. Integration control and panel

DI–2333

DI–2322

DI–2352

DI–2361

IN–35

IN–35