Toyota Tundra 2005 Service - Repair - Maintenance page 3903

4WD (Access/Standard Cab)
H2 to L4
When the touch select 2-4 SW in the integration control and panel is turned ON, and the touch select high-low SW is turned
ON, a signal is input into TERMINAL (A) 8 of the 4WD control ECU.
The 4WD control ECU is activated by this, and the current flows from the 4WD control ECU TERMINAL (B) 2 to transfer shift
actuator TERMINAL 2 to motor to TERMINAL 1 to 4WD control ECU TERMINAL (B) 1 to GROUND, and the transfer shifts to
4WD (H4 position.)
When the system shifts to 4WD, the detection SW (Transfer 4WD position) is turned ON, and the current flows from 4WD
control ECU TERMINAL (A) 2 to ADD actuator TERMINAL 5 to motor to TERMINAL 1 to 4WD control ECU TERMINAL (A) 1
to GROUND, and the ADD actuator is activated, and the ADD is connected. Then a signal is input into TERMINAL (A) 15 of
the 4WD control ECU and the 4WD control ECU is activated by this, so the current flows from the 4WD control ECU
TERMINAL (B) 2 to transfer shift actuator TERMINAL 2 to motor to TERMINAL 1 to 4WD control ECU TERMINAL (B) 1 to
GROUND. The transfer shifts to 4WD LO position (L4 position), and the 4LO indicator light comes ON.
Service Hints
F20 (A) 4WD Control ECU
(A) 5-Ground : Approx. 12 volts with ignition SW at ON or ST position
(A) 6-Ground : Always continuity
(A) 9-Ground : 4 pulses with 1 rotation
(A) 8-Ground : 2 volts or less with touch select 2-4 SW on
(A)17-Ground : 2 volts or less with detection SW (Transfer L4 position) on and transfer shift lever at L4 position
I24 (A), I25 (B) Integration Control and Panel
(A) 5-(B) 1 : Closed with touch select 2-4 SW on
P1 Park/Neutral Position SW
2-9 : Closed with A/T shift lever at N position
: Parts Location
Code
52 (2UZ-FE)
A5 A5
54 (1GR-FE)
A9 52 (2UZ-FE)
C11 A 56
C12 B 56
D3 52 (2UZ-FE)
D4 52 (2UZ-FE)
D8 57
E5 57
: Junction Block and Wire Harness Connector
Code See Page
24 (*2)
1F 1F
28 (*1)
24 (*2)
1G 1G
28 (*1)
24 (*2)
1J 1J
28 (*1)
: Connector Joining Wire Harness and Wire Harness
Code See Page
EC1 74 (2UZ-FE)
ED1 74 (2UZ-FE)
IE1
80 80
IE4
IJ1 80
* 1 : w/ Daytime Running Light
* 6 : Captain Seat * 7 : Access Cab Captain Seat
246
See Page Code
F20
F21
I24
J8
J9
J10
J12
J13
J28
Junction Block and Wire Harness (Connector Location)
Cowl Wire and Driver Side J/B (Lower Finish Panel) Cowl Wire and Driver Side J/B (Lower Finish Panel)
Joining Wire Harness and Wire Harness (Connector Location)
Engine No.2 Wire and Engine Wire (Near the Starter)
Engine No.2 Wire and Differential Wire (Near the Transmission)
Engine Wire and Cowl Wire (Right Side of Instrument Panel) Engine Wire and Cowl Wire (Right Side of Instrument Panel)
Cowl Wire and Cowl Wire (Instrument Panel Reinforcement RH)
* 2 : w/o Daytime Running Light
* 8 : Standard Cab Bench Seat
2005 TOYOTA TUNDRA (EWD611U)
See Page
A 57
B 57
A 57
58
58
58
58
58
A 58
* 3 : Access Cab
Code
J29 B 58
J64 58
J66 A 58
J67 B 58
53 (2UZ-FE)
P1 P1
55 (1GR-FE)
53 (2UZ-FE)
S29 S29
55 (1GR-FE)
T3 53 (2UZ-FE)
* 4 : Standard Cab * 5 : Bench Seat
* 9 : Access Cab w/o Power Seat
See Page