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DI-1274 DIAGNOSTICS - AUTOMATIC TRANSMISSION (A750E/A750F for
2UZ-FE)
DIDX5-01
O/D Main Switch Circuit
CIRCUIT DESCRIPTION
The O/D main switch (transmission control switch) is a momentary type switch. When pressing the O/D main
switch once, the O/D OFF indicator light comes on and the ECM prohibits shifting into O/D. When pressing
it once again, the O/D OFF indicator light goes off and the ECM allows shifting into O/D. Turning the IG switch
OFF will reset the O/D OFF indicator light.
WIRING DIAGRAM
Except Double Cab:
O4
ECM
O/D
Main SW 12
W-B R
E3 ODMS
1 3
A
J3
J/C
IF
D14232
Double Cab:
O4
J56 ECM
O/D
J/C
Main SW 12
W-B W-B B
E3 ODMS
D D 1 3
A
J58
J/C
IN
D14243
DIAGNOSTICS - AUTOMATIC TRANSMISSION (A750E/A750F for DI-1275
2UZ-FE)
INSPECTION PROCEDURE
1 Check harness and connector (O/D main switch - body ground)
Wire Harness Side: PREPARATION:
(Connector Front View): Disconnect the O/D main switch connector.
CHECK:
O4 Measure the resistance according to the value(s) in the table
below.
OK:
Tester Connection Specified Condition
1 - Body ground Below 1
D14181
NG Repair or replace the harness or connector
(See page IN-30).
OK
2 Inspect O/D main switch.
Switch Side: CHECK:
(Connector Front View): Measure the resistance according to the value(s) in the table
below.
OK:
O4
Switch Condition Tester Connection Specified Condition
O/D main switch pressed
1-3 Below 1
and held
O/D main switch released 10 k or higher
D14182
NG Replace O/D main switch (See page AT-19).
OK
DI-1276 DIAGNOSTICS - AUTOMATIC TRANSMISSION (A750E/A750F for
2UZ-FE)
3 Check harness and connector (O/D main switch - ECM).
ECM: PREPARATION:
E7 E6 E5 E4 E3 (a) Connect the O/D main switch connector.
(b) Disconnect the connector from the ECM.
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
ODMS Switch Condition Tester Connection Specified Condition
D14183
O/D main switch pressed E3 - 12 (ODMS) -
Below 1
and held Body ground
O/D main switch released 10 k or higher
NG Repair or replace the harness or connector
(See page IN-30).
OK
Proceed to next circuit inspection shown on
matrix chart (See page DI-1136).
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