Toyota Tundra (2015 year). Manual — part 871
A
NEXT
NEXT
RESULT
PROCEED TO
Fault not listed in problem symptoms table
A
Fault listed in problem symptoms table
B
B
GO TO STEP 8
7.
OVERALL ANALYSIS AND TROUBLESHOOTING
.
8.
REPAIR OR REPLACE
9.
CONFIRM TEST
NEXT
END
10.
GO TO DTC CHART
NEXT
GO TO STEP 8
WF1AM TRANSFER: TOUCH SELECT 2-4 AND HIGH-LOW SYS...
Last Modified: 9-16-2014
6.6 T
Doc ID: RM0000030AC00MX
Model Year: 2015
Model: Tundra
Prod Date Range: [08/2014 - ]
Title: WF1AM TRANSFER: TOUCH SELECT 2-4 AND HIGH-LOW SYSTEM: PROBLEM SYMPTOMS TABLE; 2015 MY
Tundra [08/2014 - ]
PROBLEM SYMPTOMS TABLE
HINT:
Touch select 2-4 and high-low system
SYMPTOM
SUSPECTED AREA
SEE
PAGE
When the vehicle is in the 2WD state and the transfer position
switch is turned to a position other than 2WD, the 4HI and 4LO
indicator lights are not illuminated
CAN communication system
Combination meter assembly
Transfer position switch (open
circuit in LO terminal circuit or
stuck OFF)
4 wheel drive control ECU
When the vehicle is in the 4H state and the transfer position
switch is turned to a position other than 4H, the 4HI indicator light
is illuminated and the 4LO indicator light is not illuminated
Transfer position switch (short
circuit in 2-4 or LO terminal circuit
or stuck ON)
4 wheel drive control ECU
When the vehicle is in the 4L state and the transfer position switch
is turned to a position other than 4L, the 4HI indicator light is not
illuminated and the 4LO indicator light is illuminated
Transfer position switch (open
circuit in 2-4 terminal circuit or
stuck OFF)
4 wheel drive control ECU
CAN communication system
A.D.D. actuator (differential
vacuum actuator assembly)
Transfer shift actuator assembly
(transfer shift motor)
A.D.D. actuator (differential
vacuum actuator assembly)
(A.D.D. shift motor)
4 wheel drive control ECU
Transfer shift actuator assembly
(transfer shift motor)
4 wheel drive control ECU
*: Blinks at 0.5 second intervals (0.5 seconds on and 0.5 seconds off)
WF1AM TRANSFER: TOUCH SELECT 2-4 AND HIGH-LOW SYS...
WF1AM TRANSFER: TOUCH SELECT 2-4 AND HIGH-LOW SYS...
Last Modified: 9-16-2014
6.6 U
Doc ID: RM0000030AB01CX
Model Year: 2015
Model: Tundra
Prod Date Range: [08/2014 - ]
Title: WF1AM TRANSFER: TOUCH SELECT 2-4 AND HIGH-LOW SYSTEM: TERMINALS OF ECU; 2015 MY Tundra
[08/2014 - ]
TERMINALS OF ECU
1. CHECK 4 WHEEL DRIVE CONTROL ECU
Text in Illustration
*a
Component with harness connected
(4 Wheel Drive Control ECU)
-
-
(a) Measure the voltage and resistance according to the value(s) in the table below.
TERMINAL NO.
(SYMBOL)
WIRING
COLOR
TERMINAL DESCRIPTION
CONDITION
SPECIFIED
CONDITION
A25-1 (DM1) -
A25-5 (GND)
W - W-B
A. D. D. shift motor
output
Ignition switch ON
Transfer position switch 4H →
2WD
(during A.D.D. actuator Lock to
Free operation)
10 to 14 V
A25-2 (DM2) -
A25-5 (GND)
Y - W-B
A. D. D. shift motor
output
Ignition switch ON
Transfer position switch 2WD →
4H
(during A.D.D. actuator Free to
Lock operation)
10 to 14 V
A25-5 (GND) -
Body ground
W-B - Body
ground
Ground
Always
Below 1 Ω
WF1AM TRANSFER: TOUCH SELECT 2-4 AND HIGH-LOW SYS...
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