Toyota Tundra. Manual — part 2941

Illuminates

4WD HIGH

detection switch 4WD [4WD: ON]



High-low transfer shift actuator limit
switch High [HL1: ON, HL2: OFF,
HL3: OFF]



High-low transfer shift actuator neutral
position switch 4HI [NP: OFF]



A.D.D. actuator limit switch Lock [DL1:
ON, DL2: OFF]



A.D.D. actuator A.D.D. detection switch
Lock [ADD: ON]

During 4WD HIGH to
2WD switching

While 2WD-4WD transfer shift actuator and
A.D.D. actuator are switching, within 3
seconds of operation of 4WD control switch
(4H to 2WD)

Does not illuminate

2WD



2WD-4WD transfer shift actuator limit
switch 2WD [TL1: ON, TL3: OFF]



2WD-4WD transfer shift actuator 4WD
detection switch 2WD [4WD: OFF]



High-low transfer shift actuator limit
switch High [HL1: ON, HL2: OFF,
HL3: OFF]



High-low transfer shift actuator neutral
position switch 4HI [NP: OFF]



A.D.D. actuator limit switch Free [DL1:
OFF, DL2: ON]



A.D.D. actuator A.D.D. detection switch
Free [ADD: OFF]

During 2WD to 4WD
HIGH switching

While 2WD-4WD transfer shift actuator and
A.D.D. actuator are switching, within 3
seconds of operation of 4WD control switch
(2WD to 4H)

4WD LOW



2WD-4WD transfer shift actuator limit
switch 4WD [TL1: OFF, TL3: ON]



2WD-4WD transfer shift actuator 4WD
detection switch 4WD [4WD: ON]



High-low transfer shift actuator limit
switch Low [HL1: OFF, HL2: ON, HL3:
OFF]



High-low transfer shift actuator neutral
position switch 4LO [NP: OFF]



A.D.D. actuator limit switch Lock [DL1:
ON, DL2: OFF]



A.D.D. actuator A.D.D. detection switch

2009 Toyota Tundra

2009 TRANSMISSION JF1A Transfer - Tundra

b. 4LO Indicator Light

4LO INDICATOR LIGHT CONDITION

Lock [ADD: ON]

During 4WD LOW to
4WD HIGH or 4WD
LOW to 2WD
switching



From change of 4WD control switch
from 4L to 4H, until high-low transfer
shift actuator change completes



From change of 4WD control switch
from 4L to 2WD, until high-low transfer
shift actuator change completes

Blinks (ON: 0.5 seconds,

OFF: 0.5 seconds)

During 2WD to 4WD
HIGH or 4WD HIGH
to 2WD switching

While 2WD-4WD transfer shift actuator and
A.D.D. actuator are switching, from 3 seconds
or more after operation of 4WD control switch
(2WD to 4H or 4H to 2WD) to switch
completion
During 4WD LOW to 2WD return control

During 4WD LOW to
2WD switching

After change of 4WD control switch from 4L
to 2WD, from high-low transfer shift actuator
switch completion until 2WD-4WD transfer
shift actuator and A.D.D. actuator switch
completion

When ignition switch is ON and 4WD control switch is between 2WD
and 4H, or 4H and 4L

Blinks (ON: 0.5 seconds,
OFF: 0.5 seconds)
Warning buzzer sounds
(ON: 0.5 seconds OFF: 0.5
seconds)

During 2WD to 4WD
HIGH or 4WD HIGH
to 2WD switching
control violation



At ambient temperature and vehicle
speed at 100 km/h (62 mph) or more,
2WD to 4WD switching operation is
performed



With vehicle speed at 100 km/h (62
mph) or more, 4WD to 2WD switching
operation is performed

During A.D.D.
actuator switching
violation

During A.D.D. actuator switching, there is
difference in rotation of front wheels and rear
wheels or front left and right wheel

Blinks (ON: 0.2 seconds,

OFF: 0.2 seconds)

During malfunction



During A.D.D. actuator limit switch
malfunction



During 2WD-4WD transfer shift
actuator limit switch malfunction



During 2WD to 4WD switching control
malfunction



During wheel speed signal malfunction



During vehicle speed signal malfunction

From 2WD to 4WD return control switching completion until 4WD
control switch is changed to 2WD

2009 Toyota Tundra

2009 TRANSMISSION JF1A Transfer - Tundra

Indicator Condition

Vehicle Condition

Details [Terminal Name: Switch

Condition]

Illuminates

4WD LOW



2WD-4WD transfer shift actuator
limit switch 4WD [TL1: OFF, TL3:
ON]



2WD-4WD transfer shift actuator
4WD detection switch 4WD [4WD:
ON]



High-low transfer shift actuator limit
switch Low [HL1: OFF, HL2: ON,
HL3: OFF]



High-low transfer shift actuator
neutral position switch 4LO [NP:
OFF]



A.D.D. actuator limit switch Lock
[DL1: ON, DL2: OFF]



A.D.D. actuator A.D.D. detection
switch Lock [ADD: ON]

During 4WD LOW to
4WD HIGH switching

While High-Low transfer shift actuator is
switching, within 3 seconds of operation of
4WD control switch (4L to 4H)

Does not illuminate

2WD



2WD-4WD transfer shift actuator
limit switch 2WD [TL1: ON, TL3:
OFF]



2WD-4WD transfer shift actuator
4WD detection switch 2WD [4WD:
OFF]



High-low transfer shift actuator limit
switch High [HL1: ON, HL2: OFF,
HL3: OFF]



High-low transfer shift actuator
neutral position switch 4HI [NP:
OFF]



A.D.D. actuator limit switch Free
[DL1: OFF, DL2: ON]



A.D.D. actuator A.D.D. detection
switch Free [ADD: OFF]

During 2WD to 4WD HIGH switching



2WD-4WD transfer shift actuator
limit switch 4WD [TL1: OFF, TL3:
ON]



2WD-4WD transfer shift actuator
4WD detection switch 4WD [4WD:

2009 Toyota Tundra

2009 TRANSMISSION JF1A Transfer - Tundra

4WD HIGH

ON]



High-low transfer shift actuator limit
switch High [HL1: ON, HL2: OFF,
HL3: OFF]



High-low transfer shift actuator
neutral position switch 4HI [NP:
OFF]



A.D.D. actuator limit switch Lock
[DL1: ON, DL2: OFF]



A.D.D. actuator A.D.D. detection
switch Lock [ADD: ON]

During 4WD HIGH to 2WD switching

During 4WD HIGH to
4WD LOW switching

While high-low transfer shift actuator is
switching, within 3 seconds of operation of
4WD control switch (4H to 4L)

Blinks (ON: 0.5 seconds,

OFF: 0.5 seconds)

During 4WD LOW to
4WD HIGH, or 4WD
HIGH to 4WD LOW
switching

While High-Low transfer shift actuator is
switching, from 3 seconds or more after
operation of 4WD control switch (4L to 4H
or 4H to 4L) to switch completion



During 4WD LOW to 4WD HIGH
return control



During 4WD HIGH to 4WD LOW
return control

When ignition switch is ON and 4WD control switch is between
2WD and 4H, or 4H and 4L

Blinks (ON: 0.5 seconds,
OFF: 0.5 seconds) Warning
buzzer sounds (ON: 0.5
seconds OFF: 0.5 seconds)

During 4WD LOW to
4WD HIGH or 4WD
LOW to 2WD switching
control violation



With vehicle speed at 5 km/h (3 mph)
or more, 4WD HIGH to 4WD LOW
or 4WD LOW to 4WD HIGH
switching operation is performed



With shift lever on position other
than N, 4WD HIGH to 4WD LOW or
4WD LOW to 4WD HIGH switching
operation is performed

When 2WD to 4WD HIGH switching is not completed, from when
4WD control switch is accidentally changed to 4L, until 4WD control
switch is changed to 4H or 2WD

During malfunction



During High-low transfer shift
actuator limit switch malfunction



During 4WD HIGH to 4WD LOW
switching control malfunction



During vehicle speed signal
malfunction



During shift position P signal

2009 Toyota Tundra

2009 TRANSMISSION JF1A Transfer - Tundra