ATTE/A340 Automatic Trans (GTE) — O D Main Switch & O D Off Indicator Light Circuit, page 108

AT2–108
A340E (2JZ—GTE) AUTOMATIC TRANSMISSION – TROUBLESHOOTING

O D Main Switch & O D OFF Indicator Light Circuit

— CIRCUIT DESCRIPTION —

The O/D main switch contacts go off when the switch is pushed in and comes on when it is pushed out.
In O/D main switch OFF position the O/D OFF indicator lights up, and the ECM prohibits shifting to over-
drive. The ECM also causes the O/D OFF indicator light to blink when a malfunction is detected. In this
case, connecting the terminals in the DLC2 or DLC1 can display the malfunction code.

— WIRING DIAGRAM —

5 1J
GAUGE
J/B No.1
12 1E

O/D OFF
Indicator Light

Y    1    2

V-G         5    V-G    28  OD2
                  II1         E10
V-G
IF3  3

V-G    V-G → To DLC2
2
O/D Main (*)
Switch
4
W-B
1E

ECM

(*) O/D Main Switch
    Contacts go off with button pushed in.
    Contacts go on with button pushed out.

Q06898