2001 TOYOTA SEQUOIA terminal TC

DI±2298
± DIAGNOSTICSAIR CONDITIONING SYSTEM
2492 Author: Date:
2005 SEQUOIA (RM1146U)
9. SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
The SEQUOIA is equipped with an SRS (Supplemental Re-
straint System) such as the driver, passenger, side, curtain
shield airbag. Failure to carry out service operation in the cor-
rect sequence could cause the SRS to unexpectedly deploy
during servicing, possibly leading to a serious accident. Before
servicing (including removal or installation of parts, inspection
or replacement), be sure to read the precautionary notices tn
the RS section.
10. INITIALIZATION
NOTICE:
When disconnecting the battery terminal, initialize the fol-
lowing system after the terminal is reconnected.
System NameSee Page
Back Door Power Window Control Sys-
temBE±77

DIDKP±01
I15876
I21 I20I19
I22
± DIAGNOSTICSAIR CONDITIONING SYSTEM
DI±2307
2501 Author: Date:
2005 SEQUOIA (RM1146U)
TERMINALS OF ECU
Integration Control and Panel
Symbols (Terminals No.)Wiring ColorTerminal DescriptionConditionSpecified Condition
+B eGND
(I19±1 e I19±10)R e OPower source (Back±up)Always10 to 14 V
IG+ e GND
(I19±2 e I19±10)R±L e OPower source (IG)IG switch OFF " ON10 to 14 V
PSW e GNDLBOPithil
A/C refrigerant pressure: less than
0.19 MPa
(2.0 kgf/cm2)10 t 14B l 10VPSW e GND
(I19±6 e I19±10)L±B e OPressure switch signal0.19 MPa (2.0 kgf/cm)
or more than 3.14 MPa (32
Kgf/cm2)
10 to 14 " Below 1.0 V
HR e GND
(I22±6 e I19±10)L±Y e OBlower motor operation
signalBlower fan OFF "ON10 to 14 " Below 1.0 V
GND e Body ground
(I19±10 e Body ground)*1O e Body groundGround for main power
supplyConstantContinuity
ACC e GND
(I19±11 e I19±10)P e OPower source (ACC)Turn ignition switch ACC10 to 14 V
TA MSG TAMAbi tt tIG ON, Ambient temp.: 25°C (77°F)1.3 to 1.8 VTAM e SG±TAM
(I19±8 e I19±20)LG±B e Y±BAmbient temperature sen-
sor signalIG ON, Ambient temp.: 40°C
(104°F)0.8 to 1.3 V
BLW e GNDGBOBlower motor operationBl f OFFON10 t 14B l 10VBLW e GND
(I19±4 e I19±10)G±B e OBlower motor o eration
signalBlower fan OFF " ON10 to 14 " Below 1.0 V
RrCLK (I21±15)*1BCommunication signal
Communication circuit
(Built in Fr A/C control panel " Rr
A/C control panel)
±
RrDPD (I21±5)*1RCommunication signal
Communication circuit
(Built in Fr A/C control panel " Rr
A/C control panel)
±
RrSWD (I21±6)*1WCommunication signal
Communication circuit
(Built in Fr A/C control panel " Rr
A/C control panel)
±
RrAMH e GND
(I21±8 e I19±10)*1R±G e ORear air mix control ser-
vomotor operation signalRr temp. control switch: Max.
COOL " Max. HOTBelow 1.0 "
10 to 14 V for 16 sec.
RrAMC e GND
(I21±9 e I19±10)*1L±B e ORear air mix control ser-
vomotor operation signalRr temp. control switch: Max. HOT
" Max. COOLBelow 1.0 "
10 to 14 V for 16 sec.
RrSG e GND
(I21±10 e I19±10)*1L±R e OGround for rear evapora-
tor temperature sensorConstantContinuity
RrS5 e RrSG
(I22±4 e I21±10)*1L±Y e L±RPower supply for rear air
mix control servomotorIG ON4.5 to 5.5 V

DI±2308
± DIAGNOSTICSAIR CONDITIONING SYSTEM
2502 Author: Date:
2005 SEQUOIA (RM1146U)Symbols (Terminals No.)
Wiring ColorTerminal DescriptionConditionSpecified Condition
RrTP e RrSG
(I21±18 e I21±10)*1W e L±RRear air mix damper posi-
tion sensor signalRr temp. control switch: Max.
COOL " Max. HOT4.0 to 1.0 V
AC1 e GND
(I22±4 e I19±10)G ± B e OCompressor operation
signalIG ON, A/C switch: OFF " ON3.7 to 4.5 "
1.3 to 2.6 V
RrFACE2 e GND
(I21±11 e I19±10)*1P±B e ORear air outlet control ser-
vomotor operation signalRr A/C control panel switch: except
FACE " FACE10 to 14 "
Below 1.0 V
RrBLK (I21±4)*1LG±BCommunication signal
Communication circuit
(Built in Fr. A/C control panel " Rr.
A/C control panel)
±
RrSTX (I21±14)*1G±YCommunication signal
Communication circuit
(Built in Fr. A/C control panel " Rr.
A/C control panel)
±
RrVM e GND
(I21±7 e I19±10)*1W±G e ORear blower motor control
signalRr blower control switch: LO " MID
" HI7.2 " 4.2 " 0.5 V
RrHR e GND
(I22±7 e I19±10)*1L±O e ORear blower motor opera-
tion signalRr blower control switch: OFF "
LO10 to 14
"Below 1.0 V
RrBLW e GND
(I21±16 e I19±10)*1L e ORear blower motor opera-
tion signalRr blower control switch: OFF "
LOBelow 1.0 "
1.5 to 3.0 V
RrFACE e GND
(I21±2 e I19±10)*1Y±B e ORear air outlet control ser-
vomotor control signalRr A/C control panel FACE switch:
OFF " ON10 to 14 "
Below 1.0 V while
switch is pushed
RrB/L e GND
(I21±3 e I19±10)*1BR±W e ORear air outlet control ser-
vomotor control signalRr A/C control panel B/L switch:
OFF " ON10 to 14 "
Below 1.0 V while
switch is pushed
RrFOOT e GND
(I21±13 e I19±10)*1G±R e ORear air outlet control ser-
vomotor control signalRr A/C control panel FOOT switch:
OFF " ON10 to 14 "
Below 1.0 V while
switch is pushed
RrTE e RrSG LG RLRRear evaporator tempera-Rr evaporator temp.: 0°C (32°F)2.0 to 2.4 VRrTE e RrSG
(I21±17 e I21±10)*1LG±R e L±RRear eva orator tem era
ture sensor signalRr evaporator temp.: 15°C (59°F)2.0 to 2.4 V
RrB/L2 e GND
(I21±12 e I19±10)*1P±G e ORear air outlet control ser-
vomotor control signalRr A/C control panel switch: except
B/L " B/L10 to 14 "
Below 1.0 V
FOOT eGND
(I21±17 e I19±10)Y±B e OAir outlet control servo-
motor control signalMode control switch except: FOOT
" FOOT10 to 14 " Below 1.0 V
FDEF e GND
(I20±7 e I19±10)LG±R e OAir outlet control servo-
motor control signalMode control switch except: FOOT/
DEF "FOOT/DEF10 to 14 " Below 1.0 V
DEF e GND
(I20±18 e I19±10)B±W e OAir outlet control servo-
motor control signalMode control switch except: DEF "
DEF10 to 14 " Below 1.0 V
AMH e GNDRLOAir mix control servomotorIG ON, Set temp.: Max. CoolBelow 1.0 VAMH e GND
(I20±10 e I19±10)R±L e OAir mix control servomotor
operation signalIG ON, Set temp.: Max. Hot10 to 14 V
S5±AM eSG±TP
(I20±22 e I20±12)R±Y e L±RPower supply for air mix
control servomotorIG ON4.5 to 5.5 V
TP e SG±TPGRLRAir mix damper positionIG ON, Set temp.: Max. Cool3.5 to 4.5 VTP e SG TP
(I20±15 e I20±12)G±R e L±RAir mix dam er osition
sensor signalIG ON, Set temp.: Max. Hot0.5 to 1.5 V
AMC e GNDWLOAir mix control servomotorIG ON, Set temp.: Max. Cool10 to 14 VAMC e GND
(I20±9 e I19±10)W±L e OAir mix control servomotor
control signalIG ON, Set temp.: Max. HotBelow 1.0 V
S5±AI e SG±TPI
(I20±11 e I20±13)L±B e Y±RAir inlet control servomo-
tor control signalIG ON4.5 to 5.5 V
TR e SG±TRLWRWRoom temperature sensorIG ON, Cabin temp.: 25°C (77°F)1.8 to 2.2 VTR e SG TR
(I20±3 e I20±1)L±W e R±WRoom tem erature sensor
signalIG ON, Cabin temp.: 40°C (104°F)1.2 to 1.6 V

± DIAGNOSTICSAIR CONDITIONING SYSTEM
DI±2309
2503 Author: Date:
2005 SEQUOIA (RM1146U)Symbols (Terminals No.)
Wiring ColorTerminal DescriptionConditionSpecified Condition
TS e S5±TSLGBSl i lIG ON08t 43VTS e S5 TS
(I20±14 e I20±21)LG e BSolar sensor signalIG ON0.8 to 4.3 V
AIR e GNDGWOAir inlet control servomo-IG ON, Push FRS switchBelow 1.0 VAIR e GND
(I20±20 e I19±10)G±W e OAir inlet control servomo
tor operation signalIG ON, Push REC switch10 to 14 V
AIF e GNDROAir inlet control servomo-IG ON, Push FRS switch10 to 14 VAIF e GND
(I20±8 e I19±10)R e OAir inlet control servomo
tor operation signalIG ON, Push REC switchBelow 1.0 V
TPI e SG±TPIWYRAir inlet control servomo-IG ON, Push REC switch3.5 to 4.5 VTPI e SG TPI
(I20±16 e I20±13)W e Y±RAir inlet control servomo
tor control signalIG ON, Push FRS switch0.5 to 1.5 V
RTRSG R TRRttIG ON, Rr room temp.: 25°C (77°F)1.8 to 2.2 VRrTR e SG±RrTR
(I22±13 e I22±14)*1GR±R e R±YRear room temperature
sensor signalIG ON, Rr room temp.: 40°C
(104°F)1.2 to 1.6 V
FACE eGND
(I20±5 e I19±10)GR e OAir outlet control servo-
motor control signalMode control switch: except FACE
" FACE10 to 14 " Below 1.0 V
B/L eGND
(I20±6 e I19±10)BR±W e OAir outlet control servo-
motor control signalMode control switch: except BI±
LEVEL " BI±LEVEL10 to 14 " Below 1.0 V
IGN e GNDYGOEi lti i lE i idliPl tiIGN e GND
(I22±3 e I19±10)Y±G e OEngine revolution signalEngine idlingPulse generation
TW e GNDWROEngine coolant tempera-IG ONPl tiTW e GND
(I22±2 e I19±10)W±R e OEngine coolant tem era
ture sensor signalIG ONPulse generation
ACT eGND
(I22±5 e I19±10)LG±B e OCompressor operation
signalIG ON, A/C switch: OFF " ONBelow 1.0 "10 to 14 V
TE e SG±TEGBWGEvaporator temperature
IG ON, Evaporator temp.: 0°C
(32°F)2.0 to 2.4 VTE e SG TE
(I20±4 e I20±2)G±B e W±GEva orator tem erature
sensor signalIG ON, Evaporator temp.: 15°C
(59°F)1.4 to 1.8 V
MGC eGND
(I19±5 e I19±10)L e OMagnetic clutch control
signalEngine start
A/C switch: OFF " ON10 to 14 " Below 1.0 V
LOCK eGND
(I19±9 e I19±10)W±R e OCompressor lock sensor
signalEngine start
A/C switch: OFF " ONPulse generation
*1: w/ Rear A/C

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 SEQUOIA (RM1146U)
3. CHECK DLC3
The vehicle's ECM uses the ISO 9141±2 communication proto-
col. The terminal arrangement of the DLC3 complies with SAE
J1962 and matches the ISO 9141±2 format.
Symbols (Terminal No.)Terminal DescriptionConditionSpecified Condition
SIL (7) ± SG (5)Bus º+º lineDuring transmissionPulse generation
CG (4) ± Body groundChassis groundAlwaysBelow 1 W
SG (5) ± Body groundSignal groundAlwaysBelow 1 W
BAT (16) ± Body groundBattery positiveAlways11 to 14 V
4. INDICATOR CHECK
(a) Turn the ignition switch on while pressing the A/C control
AUTO switch and R/F SW simultaneously.
(b) Check that all the indicators light up and go off at 1 second
intervals 4 times in succession.
HINT:

After the indicator check is ended, the diagnostic trouble
code check begins automatically.

Press the OFF switch when desiring to cancel the check
mode.

I28847
SG±TR TRI20 Integration Control and Panel:
DI±2320
± DIAGNOSTICSAIR CONDITIONING SYSTEM
2514 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION PROCEDURE
1 Check voltage between terminals TR and SG±TR of integration control and pan-
el.
PREPARATION:
Remove integration control and panel with connectors still con-
nected.
CHECK:
(a) Turn the ignition switch to ON.
(b) Measure the voltage between terminals TR and SG±TR
of the integration control and panel connector at each
temperature.
OK:
Voltage :
at 25°C (77°F) : 1.8 to 2.2 V
at 40°C (104°F) : 1.2 to 1.6 V
HINT:
As the temperature increases, the voltage decreases.
NG Go to step 2.
OK
Proceed to next circuit inspection shown in problem symptoms table (See page DI±2304). How-
ever, if DTC 11 is displayed, replace integration control and panel.

I08310
21
I28970
Resistance (kW)
Temperature
4.0
2.0 3.5
1.5
0.0
10 3.0
1.0 2.5
0.5
20 30 40 5060
68 86 104 122140
(C)
(F) 50
± DIAGNOSTICSAIR CONDITIONING SYSTEM
DI±2321
2515 Author: Date:
2005 SEQUOIA (RM1146U)
2 Check front room temperature sensor.
PREPARATION:
Disconnect the room temperature sensor connector.
CHECK:
Measure the resistance between terminals 1 and 2 of the room
temperature sensor connector at each temperature.
OK:
Tester connectionConditionSpecified condition
1±210C (50F)3.00 to 3.73 kW
1±215C (59F)2.45 to 2.88 kW
1±220C (68F)1.95 to 2.30 kW
1±225C (77F)1.60 to 1.80 kW
1±230C (86F)1.28 to 1.47 kW
1±235C (95F)1.00 to 1.22 kW
1±240C (104F)0.80 to 1.00 kW
1±245C (113F)0.65 to 0.85 kW
1±250C (122F)0.50 to 0.70 kW
1±255C (131F)0.44 to 0.60 kW
1±260C (140F)0.36 to 0.50 kW
NOTICE:

Even slightly touching the sensor may change the re-
sistance value. Be sure to hold the connector of the
sensor.

When measuring, the sensor temperature must be
the same as the ambient temperature.
HINT:
As the temperature increases, the resistance decreases (see
the graph on the left).
NG Replace front room temperature sensor.
OK
3 Check harness and connector between front room temperature sensor and in-
tegration control and panel (See page IN±35).
NG Repair or replace harness or connector.
OK
Replace integration control and panel.

I28847
SG±TAMTA M I19 Integration Control and Panel:
± DIAGNOSTICSAIR CONDITIONING SYSTEM
DI±2323
2517 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION PROCEDURE
1 Check voltage between terminals TAM and SG±TAM of integration control and
panel.
PREPARATION:
Remove the integration control and panel with connectors still
connected.
CHECK:
(a) Turn the ignition switch to ON.
(b) Measure the voltage between terminals TAM and SG±
TAM of the integration control and panel connector at
each temperature.
OK:
Voltage :
at 25°C (77°F) : 1.35 to 1.75 V
at 40°C (104°F) : 0.85 to 1.25 V
HINT:
As the temperature increases, the voltage decreases.
NG Go to step 2.
OK
Proceed to next circuit inspection shown in problem symptoms table (See page DI±2304). How-
ever, if DTC 12 is displayed, replace integration control and panel.