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Toyota Sequoia (2005). Manual - part 630

–

DIAGNOSTICS

AIR CONDITIONING SYSTEM

DI–2315

2509

BLOWER LEVEL

Blower motor speed level /

min.: Level 0 max.: 31

Increases within a range between

0 and 31 as the speed increases.

–

AMBI TEMP

Adjusted ambient temperature /

min.: –30.8

C (–23.44

max.: 50.8

C (123.44

–

SET TEMP SHIFT

Shift set temperature / +2C, +1C,

NORMAL, –1C, –2C

Customized value will be dis-

played

–

AIR INLET MODE

Air inlet mode / AUTO, MANUAL

Customized value will be dis-

played

–

COMPRESSOR MODE

Compressor mode / AUTO,

MANUAL

Customized value will be dis-

played

–

COMPRS/DEF OPER

Compressor / DEF operation

mode / LINK, NORMAL

Customized value will be dis-

played

–

FOOT/DEF MODE

Foot / DEF auto mode / ON, OFF

Customized value will be dis-

played

–

DESTINATION

Destination / DOMEST, USA, EU-

ROPE, AUSTRAL, MIDEAST, NO

INFO

Changes with destination

–

REAR ROOM TEMP

Room temperature sensor (Rear) /

min.: –6.5

C (20.3

max.: 57.25

C (135.05

Actual room temperature is dis-

played

Open in the circuit:

–6.5

C (20.3

Short in the circuit:

57.25

C (135.05

R–EVAP TEMP

Evaporator temperature sensor /

min.: –29.7

C (–21.46

max.: 59.55

C (139.19

Actual evaporator temperature is

displayed

Open in the circuit:

–29.7

C (–21.46

Short in the circuit:

59.55

C (139.19

SET TEMP REAR

Set temperature (Rear side) /

min.: 0 max.: 255

Set temperature and displayed

temperature are the same.

–

ESTIMATE TEMP–R

Estimated temperature (Rear side)

/ min.: –200

C (–328

max.:

200°

C (392

Damper is at ”MAX. COOL”:

–200

C (–328

Damper is at ”MAX. HOT”:

200°

C (392

–

A/M DAMP POS–R

Air mix damper position (Rear

side) / min.: –14% max.: 113.5%

Damper is at ”MAX. COOL”:

–10.0%

Damper is at ”MAX. HOT”

100.0%

–

A/M DAMP TARG–R

Air mix damper target position

(Rear side) /

min.: –14% max.: 113.5%

Damper is at ”MAX. COOL”:

–10.0%

Damper is at ”MAX. HOT”

100.0%

–

BLOWER LEVEL–R

Blower motor speed level /

min.: Level 0 max.: 31

Increases within a range between

0 and 31 as the speed increases.

–

#CODES

Number of trouble codes /

min.: 0 max.: 255

Number of DTCs will be displayed

–

ENGINE AND ECT / ALL:

Item

Measurement Item / Display

(Range)

Normal Condition

Diagnostic Note

A/C SIG

A/C signal / ON or OFF

A/C ON: ON

–

A/C MAG CLUTCH

A/C magnet clutch / ON or OFF

A/C magnet clutch ON: ON

–

DI–2316

–

DIAGNOSTICS

AIR CONDITIONING SYSTEM

2510

ACTIVE TEST

HINT:
Performing the ACTIVE TEST using the hand–held tester allows the relay, VSV, actuator and so on to oper-
ate without part removal. Performing the ACTIVE TEST as the first step of troubleshooting is one way to
shorten labor time.
(a)

Connect the hand–held tester to the DLC3.

(b)

Turn the ignition switch to the ON position.

(c)

From the display on the tester, perform the ”ACTIVE TEST”.

AIR CONDITIONING:

Item

Test Details / Display (Range)

Diagnostic Note

BLOWER MOTOR

Blower motor / min.: 0 max.: 31

–

AIR MIX DAMP–D

Air mix damper (Driver side) / min.: –14% max.: 113.5%

–

A/I DAMP–LINEAR

Air inlet damper position (Linear) / min.: –14% max.: 113.5%

–

REAR BLOWER

Blower motor (Rear) / min.: 0 max.: 31

–

AIR MIX DAMP–R

Air mix damper (Rear) / min.: –14% max.: 113.5%

–

A/C MAG CLUTCH

A/C magnetic clutch relay / OFF, ON

–

DEFOGGER RLY–R

Defogger relay (Rear) / OFF, ON

–

DI3F1–09

–

DIAGNOSTICS

AIR CONDITIONING SYSTEM

DI–2317

2511

DIAGNOSTIC TROUBLE CODE CHART

If a malfunction code is displayed during the DTC check, check the circuit listed for that code in the table
below (Proceed to the page given for that circuit.)

DTC No.

(See page)

Detection Item

Trouble Area

Memory

Normal

–

11 *

(

DI–2319

)

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

(8.5 min. or more)

(

DI–2322

)

Ambient temperature sensor circuit

Ambient temp. sensor

Harness or connector between ambient temp. sensor and

integration control and panel

Integration control and panel

(8.5 min. or more)

(

DI–2325

)

Front evaporator temperature sensor

circuit

Front evaporator temp. sensor

Harness or connector between front evaporator temp. sen-

sor and integration control and panel

Integration control and panel

(8.5 min. or more)

(

DI–2328

)

Engine coolant temperature sensor cir-

cuit

Engine coolant temp. sensor

Harness or connector between engine coolant temp. sensor

and ECM

Harness or connector between ECM and integration control

and panel

Integration control and panel

ECM

–

(

DI–2330

)

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

(8.5 min. or more)

19 *

(

DI–2333

)

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

(8.5 min. or more)

21 *

Solar sensor circuit (Open)

Solar sensor

Harness or connector between solar sensor and integration

–

21 *

(

DI–2336

)

Solar sensor circuit (Short)

Harness or connector between solar sensor and integration

control and panel

Integration control and panel

(8.5 min. or more)

22 *

(

DI–2339

)

All conditions below are detected for 3

sec. or more

(a) Engine speed: 450 rpm or more

(b) Ratio between engine and compres-

sor rpm deviates 20% or more in com-

parison to normal operation.

Compressor drive belt

Compressor lock sensor

Compressor

Harness or connector between compressor lock sensor and

integration control and panel

Integration control and panel

–

(

DI–2342

)

Open in pressure sensor circuit

Abnormal refrigerant pressure

[below 196 kPa (2.0 kgf/cm

, 28 psi)

over 3,140 kPa (32.0 kgf/cm

, 455 psi)]

Pressure switch

Harness or connector between pressure switch and integra-

tion control and panel

Refrigerant pipe line

Integration control and panel

–

DI–2318

–

DIAGNOSTICS

AIR CONDITIONING SYSTEM

2512

(

DI–2346

)

Front air mix damper position sensor

circuit

Front air mix damper position sensor

Harness or connector between front air mix damper position

sensor and integration control and panel

Integration control and panel

(1 min. or more)

(

DI–2349

)

Air inlet damper position sensor circuit

Air inlet damper position sensor

Harness or connector between air inlet damper position

sensor and integration control and panel

Integration control and panel

(1 min. or more)

(

DI–2352

)

Water valve damper position sensor cir-

cuit

Water valve damper position sensor

Harness or connector between water valve damper position

sensor and integration control and panel

Integration control and panel

(1 min. or more)

(

DI–2355

)

Front air mix damper control servomotor

circuit

Front air mix damper control servomotor

Front air mix damper position sensor

Harness or connector between integration control and panel

and front air mix damper control servomotor

Harness or connector between air mix position sensor and

integration control and panel front

Integration control and panel

(15 sec. or more)

(

DI–2358

)

Air inlet damper control servomotor cir-

cuit

Air inlet damper control servomotor

Air inlet damper position sensor

Harness or connector between air inlet damper control ser-

vomotor and integration control and panel

Harness or connector between air inlet damper position

sensor and integration control and panel

Integration control and panel

(15 sec. or more)

(

DI–2361

)

Water valve damper control servomotor

circuit

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

(15 sec. or more)

HINT:

If the room temp. is approx. –20

C (–4

F) or lower, this DTC may be output even though the system

is normal.

If the ambient temp. is approx. –50

C (–58

F) or lower, DTC 12 may be output even though the sys-

tem is normal.

If the check is being performed in a dark place, DTC 21 (solar sensor circuit abnormal) could be dis-

played. In this case, perform DTC check again while illuminating the solar sensor with an inspection
light etc.. If DTC 21 is still displayed, there could be trouble in the solar sensor circuit.

Compressor lock (DTC 22) is indicated only for a current malfunction. (See page

DI–2339

)

To confirm DTC 22, preform the following steps.

(1)

With the engine ON, enter the DTC check mode.

(2)

Press the R/F switch to enter actuator check mode, and set the operation to Step No. 3.

(3)

Press the AUTO switch to return to DTC check mode.

(4)

The DTC is displayed after approx. 3 sec.

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