Tacoma PreRunner Extra Cab 2WD V6-3.4L (5VZ-FE) (2000)
Overdrive Indicator Lamp: Testing and Inspection
O/D Cancel Signal Circuit
CIRCUIT DESCRIPTION
While driving uphill with cruise control activated, in order to minimize gear shifting and provide smooth cruising O/D may be prohibited temporarily
under some conditions.
The cruise control ECU sends O/D cut signals to the ECM as necessary and the ECM cancels O/D shifting until these signals are discontinued.
WIRING DIAGRAM