A/T Does Not Shift: D4->D3, OD Control Switch On->Off

17. A/T Does Not Shift: D4 -> D3, When Overdrive Control Switch ON -> OFF

SYMPTOM: A/T does not shift from D4 to D3 when changing overdrive control switch to OFF position.


1. CHECK OVERDRIVE CONTROL SWITCH CIRCUIT
With CONSULT-II
Does "TCM INPUT SIGNALS" in Data Monitor show damage to overdrive control switch circuit?








Without CONSULT-II
Does self-diagnosis show damage to overdrive control switch circuit?

Yes or No?

Yes >> Check overdrive control switch circuit. Refer to "20. Vehicle Does Not Decelerate By Engine Brake; DIAGNOSTIC PROCEDURE". Vehicle Does Not Decelerate By Engine Brake

No >> Go to "10. A/T Does Not Shift: D2 -> D3". A/T Does Not Shift: D2->D3