Toyota Sequoia (2005). Manual — part 629
I22575
DOME Fuse
Engine Room J/B
–
DIAGNOSTICS
AIR CONDITIONING SYSTEM
DI–2311
2505
3.
CLEARING DTC
(a)
Pull out the DOME fuse from the engine room J/B for 10
sec. or longer to clear the diagnostic DTC’s memory.
(b)
After reinserting the fuse, check that the normal code is
output.
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/F
R/F
AUTO
AUTO
AUTO
: Indicates a switch operation.
DEF
DEF
DEF
DEF
R/F: Recirculation/Fresh select switch
DEF: Defogger switch
DI–2312
–
DIAGNOSTICS
AIR CONDITIONING SYSTEM
2506
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.
→
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
1 2 3 4 5 6 7 8
9 10111213141516
DLC3
I15897
AUTO S/W
R/F S/W
AC2163
Blinking Pattern
4 times
1 sec.
1 sec.
ON
OFF
–
DIAGNOSTICS
AIR CONDITIONING SYSTEM
DI–2313
2507
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 Description
Condition
Specified Condition
SIL (7) – SG (5)
Bus ”+” line
During transmission
Pulse generation
CG (4) – Body ground
Chassis ground
Always
Below 1
Ω
SG (5) – Body ground
Signal ground
Always
Below 1
Ω
BAT (16) – Body ground
Battery positive
Always
11 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.
DIDKS–01
DI–2314
–
DIAGNOSTICS
AIR CONDITIONING SYSTEM
2508
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 ”DATA LIST”.
AIR CONDITIONING:
Item
Measurement Item / Display
(Range)
Normal Condition
Diagnostic 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–D
Solar sensor (Driver side) /
min.: 0 max.: 255
Increases as brightness increases
Open 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–D
Set temperature (Driver side) /
min.: 0 max.: 255
Set 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 ”MAX. COOL”:
–200
°
C (–328
°
F)
Damper is at ”MAX. HOT”:
200°
C (392
°
F)
–
A/M DAMP POS–D
Air mix damper position (Driver
side) / min.: –14% max.: 113.5%
Damper is at ”MAX. COOL”:
–10.0%
Damper is at ”MAX. HOT”:
100.0%
–
A/I DAMP POS
Air inlet damper position /
min.: –9% max.: 109%
Damper is at ”RECIRCULATION”:
–9%
Damper is at ”FRESH”: 109.0%
Damper is at ”HALF–RECIR-
CULATION”: 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 ”MAX. COOL”:
–10.0%
Damper is at ”MAX. HOT”:
100.0%
–
A/I DAMP TARG
Air inlet damper target position /
min.: –9% max.: 109%
Damper is at ”RECIRCULATION”:
–9%
Damper is at ”FRESH”: 109.0%
Damper is at ”HALF–RECIR-
CULATION”: 30.0 to 80.0%
Open in the circuit: 50.0%
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