DI–522
–
DIAGNOSTICS
AUTOMATIC TRANSMISSION (A340E, A340F)
784
Author:
Date:
2003 TOYOTA TACOMA (RM1002U)
O/D Main Switch & O/D OFF Indicator Light Circuit
CIRCUIT DESCRIPTION
The O/D main switch is a momentary type switch. When pressing the O/D OFF main switch, the O/D OFF
indicator light lights up and ECM prohibit shifting to O/D, and when pressing it again, the O/D OFF indicator
light goes off and ECM allows shifting to O/D. Turning the IG switch OFF will reset the O/D OFF indicator
light.
DI0T2–08
D13074
3RZ–FE
B–R
J/B No. 3
19
3D
3D
20 B–R
L–O
5
C10
C12
6
O/D OFF
Indicator Light
10
E5 ODLP
ECM
J/B No. 1
5
1F
1I
2
GAUGE
B–Y
I14
Ignition Switch
4
2
W
R/B No. 2
W
W–B
ALT
AM1
2
1
1
2
2
2
O/D Main
Switch
10
5
S4
S4
LG
25
E6 ODMS
J/B No. 3
Battery
22
17
3G
3G
W–B
W–B
IE
IG
L–O
J13
J/C
B
B
W–B
IG1
AM1
–
DIAGNOSTICS
AUTOMATIC TRANSMISSION (A340E, A340F)
DI–523
785
Author:
Date:
2003 TOYOTA TACOMA (RM1002U)
WIRING DIAGRAM
D10874
5VZ–FE
B–R
J/B No. 3
19
20
3D
3D B–R
L–O
O/D OFF
Indicator Light
5
6
C10
C12
ECM
ODLP
J/B No. 1
5
1F
1I
GAUGE
2
B–Y
I14
Ignition Switch
4
2
W
R/B No. 2
W
2
2
2
2
ALT
AM1
1
1
Battery
W–B
10
S4
O/D Main
Switch
5
S4
LG
14
E6 ODMS
J/B No. 3
22
17
3G
3G
W–B
W–B
W–B
IG
IE
E6
20
J13
J/C
B
B
L–O
AM1
IG1
DI–524
–
DIAGNOSTICS
AUTOMATIC TRANSMISSION (A340E, A340F)
786
Author:
Date:
2003 TOYOTA TACOMA (RM1002U)
–
DIAGNOSTICS
AUTOMATIC TRANSMISSION (A340E, A340F)
DI–525
787
Author:
Date:
2003 TOYOTA TACOMA (RM1002U)
INSPECTION PROCEDURE
1
Check operation of O/D main switch.
PREPARATION:
Turn the ignition switch ON.
CHECK:
(a)
Check O/D OFF indicator light when O/D main switch is
pushed in to ON.
(b)
Check O/D OFF Indicator light when O/D main switch is
pushed again.
OK:
(a) O/D OFF indicator light lights up.
(b) O/D OFF indicator light goes off.
OK
Proceed to next inspection shown on problem
symptoms table (See page DI–476).
NG
2
Check and replace the combination meter (See page BE–2).
NG
Replace the combination meter.
OK
Q08284
D12443
3RZ–FE
ODMS
(–)
(+)
5VZ–FE
ODMS
(–)
(+)
DI–526
–
DIA