2001 TOYOTA SEQUOIA Service Repair Manual

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Page 2513 of 4323

TOYOTA SEQUOIA 2001 Service Repair Manual I22575
DOME Fuse Engine Room J/B
± DIAGNOSTICSAIR CONDITIONING SYSTEM
DI±2311
2505 Author: Date:
2005 SEQUOIA (RM1146U)
3. CLEARING DTC
(a) Pull out the DOME fuse from the engine room J/B for 10

Page 2514 of 4323

TOYOTA SEQUOIA 2001 Service Repair Manual DIDKR±01
AT0716
0.5 Seconds
0.5 Seconds ON
OFF
Turn ignition switch ON with AUTO and
R/F switches held down.
Indicator Check
DTC Check
(Sensor Check)
(continuous operation)
DTC Chec

Page 2515 of 4323

TOYOTA SEQUOIA 2001 Service Repair Manual A04550
12345678
9 1 0 111 21 31 41 51 6
DLC3
I15897
AUTO S/W
R/F S/W
AC2163
Blinking Pattern
4 times
1 sec.
1 sec.
ON
OFF
± DIAGNOSTICSAIR CONDITIONING SYSTEM
DI±2313
2507 Author: Date:
2005 SEQU

Page 2516 of 4323

TOYOTA SEQUOIA 2001 Service Repair Manual DIDKS±01
DI±2314
± DIAGNOSTICSAIR CONDITIONING SYSTEM
2508 Author: Date:
2005 SEQUOIA (RM1146U)
DATA LIST / ACTIVE TEST
1. DATA LIST
HINT:
From the DATA LIST displayed on the hand±held tester,

DIDKS±01
DI±2314
± DIAGNOSTICSAIR CONDITIONING SYSTEM
2508 Author: Date:
2005 SEQUOIA (RM1146U)
DATA LIST / ACTIVE TEST
1. DATA LIST
HINT:
From the DATA LIST displayed on the hand±held tester, you can read the values of the displays, sensors,
actuators and so on without part removal. Reading the DATA LIST 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, select ºDATA LISTº.
AIR CONDITIONING:
ItemMeasurement Item / Display
(Range)Normal ConditionDiagnostic Note
ROOM TEMP
Room temperature sensor /
min.: ±6.5°C (20.3°F)
max.: 57.25°C (135.05°F)Actual room temperature is dis-
played
Open in the circuit:
±6.5°C (20.3°F)
Short in the circuit:
57.25°C (135.05°F)
AMBI TEMP SENS
Ambient temperature sensor /
min.: ±30.8°C (±23.44°F)
max.: 50.8°C (123.44°F)Actual ambient temperature is dis-
played
Open in the circuit:
±30.8°C (±23.44°F)
Short in the circuit:
50.8°C (123.44°F)
EVAP TEMP
Evaporator temperature sensor /
min.: ±29.7°C (±21.46°F)
max.: 59.55°C (139.19°F)Actual evaporator temperature is
displayed
Open in the circuit:
±29.7°C (±21.46°F)
Short in the circuit:
59.55°C (139.19°F)
SOLAR SENS±DSolar sensor (Driver side) /
min.: 0 max.: 255Increases as brightness increasesOpen in the circuit: 0
Short in the circuit: 255
COOLANT TEMP
Engine coolant temperature /
min.: 1.3°C (34.34°F)
max.: 90.55°C (194.99°F)Actual engine coolant temperature
is displayed while the engine is
warmed up
±
SET TEMP±DSet temperature (Driver side) /
min.: 0 max.: 255Set temperature and displayed
temperature are the same±
ESTIMATE TEMP±D
Estimated temperature (Driver
side) / min.: ±200°C (±328°F)
max.: 200°C (392°F)Damper is at ºMAX. COOLº:
±200°C (±328°F)
Damper is at ºMAX. HOTº:
200°C (392°F)
±
A/M DAMP POS±DAir mix damper position (Driver
side) / min.: ±14% max.: 113.5%
Damper is at ºMAX. COOLº:
±10.0%
Damper is at ºMAX. HOTº:
100.0%
±
A/I DAMP POSAir inlet damper position /
min.: ±9% max.: 109%
Damper is at ºRECIRCULATIONº:
±9%
Damper is at ºFRESHº: 109.0%
Damper is at ºHALF±RECIR-
CULATIONº: 30.0 to 80.0%
Open in the circuit: 50.0%
A/M DAMP TARG±D
Air mix damper target position
(Driver side) /
min.: ±14% max.: 113.5%Damper is at ºMAX. COOLº:
±10.0%
Damper is at ºMAX. HOTº:
100.0%
±
A/I DAMP TARGAir inlet damper target position /
min.: ±9% max.: 109%
Damper is at ºRECIRCULATIONº:
±9%
Damper is at ºFRESHº: 109.0%
Damper is at ºHALF±RECIR-
CULATIONº: 30.0 to 80.0%
Open in the circuit: 50.0%

Page 2517 of 4323

TOYOTA SEQUOIA 2001 Service Repair Manual ± DIAGNOSTICSAIR CONDITIONING SYSTEM
DI±2315
2509 Author: Date:
2005 SEQUOIA (RM1146U)BLOWER LEVEL
Blower motor speed level /
min.: Level 0 max.: 31Increases within a range between
0 and 31 as

± DIAGNOSTICSAIR CONDITIONING SYSTEM
DI±2315
2509 Author: Date:
2005 SEQUOIA (RM1146U)BLOWER LEVEL
Blower motor speed level /
min.: Level 0 max.: 31Increases within a range between
0 and 31 as the speed increases.±
AMBI TEMP
Adjusted ambient temperature /
min.: ±30.8°C (±23.44°F)
max.: 50.8°C (123.44°F)
±±
SET TEMP SHIFTShift set temperature / +2C, +1C,
NORMAL, ±1C, ±2CCustomized value will be dis-
played±
AIR INLET MODEAir inlet mode / AUTO, MANUALCustomized value will be dis-
played±
COMPRESSOR MODECompressor mode / AUTO,
MANUALCustomized value will be dis-
played±
COMPRS/DEF OPERCompressor / DEF operation
mode / LINK, NORMALCustomized value will be dis-
played±
FOOT/DEF MODEFoot / DEF auto mode / ON, OFFCustomized 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°F)
max.: 57.25°C (135.05°F)Actual room temperature is dis-
played
Open in the circuit:
±6.5°C (20.3°F)
Short in the circuit:
57.25°C (135.05°F)
R±EVAP TEMP
Evaporator temperature sensor /
min.: ±29.7°C (±21.46°F)
max.: 59.55°C (139.19°F)Actual evaporator temperature is
displayed
Open in the circuit:
±29.7°C (±21.46°F)
Short in the circuit:
59.55°C (139.19°F)
SET TEMP REARSet temperature (Rear side) /
min.: 0 max.: 255Set temperature and displayed
temperature are the same.±
ESTIMATE TEMP±R
Estimated temperature (Rear side)
/ min.: ±200°C (±328°F)
max.: 200°C (392°F)Damper is at ºMAX. COOLº:
±200°C (±328°F)
Damper is at ºMAX. HOTº:
200°C (392°F)
±
A/M DAMP POS±RAir mix damper position (Rear
side) / min.: ±14% max.: 113.5%
Damper is at ºMAX. COOLº:
±10.0%
Damper is at ºMAX. HOTº
100.0%
±
A/M DAMP TARG±R
Air mix damper target position
(Rear side) /
min.: ±14% max.: 113.5%Damper is at ºMAX. COOLº:
±10.0%
Damper is at ºMAX. HOTº
100.0%
±
BLOWER LEVEL±RBlower motor speed level /
min.: Level 0 max.: 31Increases within a range between
0 and 31 as the speed increases.±
#CODESNumber of trouble codes /
min.: 0 max.: 255Number of DTCs will be displayed±
ENGINE AND ECT / ALL:
ItemMeasurement Item / Display
(Range)Normal ConditionDiagnostic Note
A/C SIGA/C signal / ON or OFFA/C ON: ON±
A/C MAG CLUTCHA/C magnet clutch / ON or OFFA/C magnet clutch ON: ON±

Page 2518 of 4323

TOYOTA SEQUOIA 2001 Service Repair Manual DI±2316
± DIAGNOSTICSAIR CONDITIONING SYSTEM
2510 Author: Date:
2005 SEQUOIA (RM1146U)
2. ACTIVE TEST
HINT:
Performing the ACTIVE TEST using the hand±held tester allows the relay, VSV, actuator

Page 2519 of 4323

TOYOTA SEQUOIA 2001 Service Repair Manual DI3F1±09
± DIAGNOSTICSAIR CONDITIONING SYSTEM
DI±2317
2511 Author: Date:
2005 SEQUOIA (RM1146U)
DIAGNOSTIC TROUBLE CODE CHART
If a malfunction code is displayed during the DTC check, check the

DI3F1±09
± DIAGNOSTICSAIR CONDITIONING SYSTEM
DI±2317
2511 Author: Date:
2005 SEQUOIA (RM1146U)
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 ItemTrouble AreaMemory
00Normal±±
11 *1
(DI±2319)
Front room temperature sensor circuitFront 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)
12 *2
(DI±2322)
Ambient temperature sensor circuitAmbient temp. sensor
Harness or connector between ambient temp. sensor and
integration control and panel
Integration control and panel

(8.5 min. or more)
13
(DI±2325)
Front evaporator temperature sensor
circuitFront 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)
14
(DI±2328)
Engine coolant temperature sensor cir-
cuitEngine 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
±
17
(DI±2330)
Rear evaporator temperature sensor
circuitRear 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 *1
(DI±2333)
Rear room temperature sensor circuitRear 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 *3
Solar sensor circuit (Open)Solar sensor
Harness or connector between solar sensor and integration±
21 *3
(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 *4
(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
±
23
(DI±2342)
Open in pressure sensor circuit
Abnormal refrigerant pressure
[below 196 kPa (2.0 kgf/cm
2, 28 psi)
over 3,140 kPa (32.0 kgf/cm2, 455 psi)]
Pressure switch
Harness or connector between pressure switch and integra-
tion control and panel
Refrigerant pipe line
Integration control and panel
±

Page 2520 of 4323

TOYOTA SEQUOIA 2001 Service Repair Manual DI±2318
± DIAGNOSTICSAIR CONDITIONING SYSTEM
2512 Author: Date:
2005 SEQUOIA (RM1146U)31
(DI±2346)
Front air mix damper position sensor
circuitFront air mix damper position sensor
Harness or

DI±2318
± DIAGNOSTICSAIR CONDITIONING SYSTEM
2512 Author: Date:
2005 SEQUOIA (RM1146U)31
(DI±2346)
Front air mix damper position sensor
circuitFront 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)
32
(DI±2349)
Air inlet damper position sensor circuitAir 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)
37
(DI±2352)
Water valve damper position sensor cir-
cuitWater 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)
41
(DI±2355)
Front air mix damper control servomotor
circuitFront 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)
42
(DI±2358)
Air inlet damper control servomotor cir-
cuitAir 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)
47
(DI±2361)
Water valve damper control servomotor
circuitWater 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:
*1 If the room temp. is approx. ±20°C (±4°F) or lower, this DTC may be output even though the system
is normal.
*2
If the ambient temp. is approx. ±50°C (±58°F) or lower, DTC 12 may be output even though the sys-
tem is normal.
*3
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.
*4
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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