ATTE/A340 Automatic Trans (GTE) — O D Cancel Signal Circuit, page 111

AT2–111
A340E (2JZ—GTE) AUTOMATIC TRANSMISSION – TROUBLESHOOTING

O D Cancel Signal Circuit

— CIRCUIT DESCRIPTION —

While driving with cruise control activated, in order to minimize gear shifting and provide smooth up–hill
cruising, overdrive may be prohibited temporarily in some conditions.
The Cruise Control ECU sends O/D cut signals to the ECM as necessary and the ECM cancels overdrive
shifting until these signals are discontinued.
(For details see the cruise control section, page BE–162)

— WIRING DIAGRAM —

Cruise Control ECU                                          ECM

                                                    4 — 6 V

        OD  C16   9   BR-B   11   U2   BR-B   12  OD1  E10

Q04434

INSPECTION PROCEDURE

1    Check voltage between terminal OD1 of ECM connector and body ground.

ON
        Check Harness A
        ECM

   A  12        OD1

BE6653
AT8774

P    1.  Connect the Check Harness A to the ECM
     2.  Turn ignition switch ON.

C    Measure voltage between terminal OD1 of ECM
     connector and body ground.

OK   Voltage: 4 — 6 V

NG                          OK    Proceed to next circuit inspection shown on ma-
                                  trix chart (See page AT2–64).

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