Toyota Tundra 2005 Service - Repair - Maintenance page 2392

STANDARD VALUE OF ECU TERMINAL
Terminals (Symbols)
F20−9 (SPD) − F20−6
(GND)
F20−8 (2−4) − F20−6 (GND)
F20−22 (N) − F20−6 (GND)
F21−22 (4WD) − F20−6
(GND)
F20−15 (LO) − F20−6 (GND)
F21−23 (TL3) − F20−6
(GND)
F21−25 (TL1) − F20−6
(GND)
F20−13 (DL1) − F20−6
(GND)
F20−2 (DM1) − F20−1 (DM2) F20 2 (DM1) F20 1 (DM2)
F20−5 (IG) − F20−6 (GND)
F21 2 (TM1) F21−2 (TM1) − F21−1 (TM2) F21 1 (TM2)
F21−7 (L4) − F20−6 (GND)
F21−26 (ADD) − F20−6
(GND)
TRANSFER
F20
6 5 2
4 3
16 15 14 13 12 11 10
24 23 22 21 20
During driving
S Ignition switch ON
S Touch select 2−4 switch OFF
S Ignition switch ON
S Transmission shift lever : positions other than N
S Ignition switch ON
S Touch select 2−4 switch OFF
S Ignition switch ON, touch select 2−4 switch ON
S Touch select high−low switch OFF
S Ignition switch ON, touch select 2−4 switch ON
S 4HI (touch select high−low switch OFF)
ON)
S Ignition switch ON
S 4HI (touch select 2−4 switch ON)
S Ignition switch ON
S A.D.D. FREE
LOCK
S Ignition switch ON
S A.D.D. LOCK
S Ignition switch ON
S A.D.D. FREE
Ignition switch ON
S Ignition switch ON
S Touch select 2−4 switch OFF
S Ignition switch ON
S Touch select 2−4 switch ON
S Ignition switch ON, touch select 2−4 switch ON
S Touch select high−low switch OFF ON
S Ignition switch ON
S A.D.D. LOCK
− TOUCH SELECT 2−4 AND HIGH−LOW SYSTEM
8. INSPECT 4HI AND 4LO INDICATOR LIGHT
Check the combination meter (See page BE−86).
9. INSPECT 4WD CONTROL ECU
Connect the wire harness side connector to the 4WD control
ECU and inspect the wire harness side connector from the
back, as shown.
F21
1 6 5 4 3 2 1
9 8 7
17 16 15 14 13 12 11 10 9 8 7
19 18 17
26 25 24 23 22 21 20 19 18
Condition
ON
N
ON
ON
4LO (touch select high−low switch
2WD (touch select 2−4 switch OFF)
TR−43
F20086
STD Voltage (V)
Pulse generation
10 to 14 1.5 or less
10 to 14 1.5 or less
10 to 14 1.5 or less
10 to 14 1.5 or less
10 to 14 0.88 or less
10 to 14 0.88 or less
10 to 14 0.5 or less
10 to 14 (for about 5 10 to 14 (for about 5
seconds) less than 0.5
10 to 14
10 to 14 (for about 5 10 to 14 (for about 5
seconds) less than 0.5
10 to 14 1.5 or less
10 to 14 1.5 or less