2001 TOYOTA SEQUOIA ECO mode

PKB OFF
REV OFFSPEED 49km/h
TAIL OFF
I28975
DI±2216
± DIAGNOSTICSNAVIGATION SYSTEM
2410 Author: Date:
2005 SEQUOIA (RM1146U)
Illumination for panel switch does not come on with tail switch on
INSPECTION PROCEDURE
1 Display check mode (Vehicle signal check mode).
PREPARATION:
Enter the ºDisplay Checkº mode (Vehicle Signal Check Mode)
(See page DI±2176).
CHECK:
Turn the light control switch to the TAIL, HEAD or OFF position.
OK:
Light Control SwitchDisplay
TAIL or HEADON
OFFOFF
HINT:
The display is updated once per second. As a result, it is normal
for the display to lag behind the actual change in the switch.
OK Replace radio and navigation assy.
NG
Proceed to next circuit inspection shown in problem symptoms table (See page DI±2184).
DIDCA±01

I28248
PKB OFF
REV OFFSPEED 49km/h
TAIL OFF
I28975
± DIAGNOSTICSNAVIGATION SYSTEM
DI±2217
2411 Author: Date:
2005 SEQUOIA (RM1146U)
Display does not dim (Night screen) with tail switch on
INSPECTION PROCEDURE
1 Check image quality setting.
PREPARATION:
(a) Enter the display adjustment screen by pressing the ºDIS-
PLAYº switch.
(b) Turn the light control switch to the TAIL position.
CHECK:
Check if ºDAY MODEº on the display adjustment is ON.
OK:
ºDAY MODEº is ON.
OK Turn forced ºDAY MODEº setting off.
NG
2 Display check mode (Vehicle signal check mode).
PREPARATION:
Enter the ºDisplay Checkº mode (Vehicle Signal Check Mode)
(See page DI±2176).
CHECK:
Turn the light control switch to the TAIL, HEAD or OFF position.
OK:
Light Control SwitchDisplay
TAIL or HEADON
OFFOFF
HINT:
The display is updated once per second. As a result, it is normal
for the display to lag behind the actual change in the switch.
OK Replace radio and navigation assy.
NG
Proceed to next circuit inspection shown in problem symptoms table (See page DI±2184).
DIDCC±01

I28262
DI±2240
± DIAGNOSTICSNAVIGATION SYSTEM
2434 Author: Date:
2005 SEQUOIA (RM1146U)
3 Navigation check mode (Vehicle sensors check).
CHECK:
Check the ºREVº display according to the table below.
OK:
Shift leverDisplay
RON
Any position except ROFF
HINT:
The display is updated once per second. As a result, it is normal
for the display to lag behind the actual change in the switch.
NG Go to ºreverse signal circuitº in flow chart
(See page DI±2294).
OK
Proceed to next circuit inspection shown in problem symptoms table (See page DI±2184).

DIDKO±01
I15897R/F SW
I15897DEF. SW
STEP
1
2
3
4
5
6
7
8
9
10DISPLAY
CODE
Fr
BLOWER
LEVELFr
OUTLETINLET
COMPRESSORFr A/M
DAMPERRr
BLOWER
LEVELRr
OUTLETRr A/M
DAMPER
1
2
3
4
5
6
7
8
9 0
1 0
16
31FACE
B/L
FOOT
F/D
DEFFRS
R/F (50%)
RECOFF
ON±14%
50.0%
113.5%1 0
10
31FACE1
FACE2
B/L1
B/L2
FOOT0.0%
40.0%
60.0%
86.5%
± DIAGNOSTICSAIR CONDITIONING SYSTEM
DI±2303
2497 Author: Date:
2005 SEQUOIA (RM1146U)
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.

± DIAGNOSTICSAIR CONDITIONING SYSTEM
DI±2305
2499 Author: Date:
2005 SEQUOIA (RM1146U)Symptom
Suspected AreaSee 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 panelDI±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 panelDI±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 panelAC±35
AC±35
IN±35
Engine idle up does not occur, or is continuous1. Compressor circuit
2. ECMDI±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 panelDI±2366
IN±35
Rear A/C:
SymptomSuspected AreaSee 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 circuitIN±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 panelDI±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 circuitAC±95
AC±45
±
IN±35
DI±2336
DI±2368
Air Flow Control: Insufficient air flow1. Rear blower motor
2. Rear blower resisterAC±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 panelAC±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 panelDI±2352
DI±2361
DI±2333
DI±2322
DI±2330
IN±35
IN±35

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 Check
(Sensor Check)
(stepped operation)
Cancel check mode and start A/C
control Actuator Check
(continuous operation)
Actuator Check
(stepped operation) AUTO switch and R/F switch are
not pressed at the same time.
OFF
OFF
OFF
OFF R/F
R/FR/F AUTO
AUTO
AUTO
: Indicates a switch operation.
DEFDEF
DEFDEF
R/F: Recirculation/Fresh select switch
DEF: Defogger switch DI±2312
± DIAGNOSTICSAIR CONDITIONING SYSTEM
2506 Author: Date:
2005 SEQUOIA (RM1146U)
CHECK MODE PROCEDURE
1. WARNING FOR A/C COMPRESSOR LOCK
If compressor lock occurs during A/C operation, the A/C switch
indicator on the A/C control assembly starts blinking.
When this occurs, check for compressor lock (DTC 22) using
diagnosis trouble code check then proceed to inspect the circuit
or the component.
Compressor lock sensor circuit. " (See page DI±2339)
2. LIST OF OPERATION METHODS
By operating each of the A/C control switches as shown in the diagram below, it is possible to enter the diag-
nosis check mode.

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.

± 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±