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17. A/T Does Not Shift: D 4 → D 3 , When Overdrive Control Switch “ON” → “OFF” =NBAT0089 SYMPTOM: 4 to D 3 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? SAT344H Yes or No Yes © Check overdrive control switch circuit. Refer to AT-257. No © Go to “10. A/T Does Not Shift: D 2 , D 3 ”, AT-239. GI MA EM LC EC FE TF PD AX SU BR ST RS BT HA SC EL IDX TROUBLE DIAGNOSES FOR SYMPTOMS 17. A/T Does Not Shift: D 4 → D 3 , When Overdrive Control Switch “ON” → “OFF” AT-253 |