A/T Does Not Shift: D3 -> D2

A/T Does Not Shift: D3 -> D2

SYMPTOM:
The vehicle does not shift down from the D3 to D2 .

DIAGNOSTIC PROCEDURE
1. CHECK SELF-DIAGNOSIS
With CONSULT-II
After executing a traveling test, confirm that the self-diagnosis results. Do the following malfunctioning items indicate?
^ High & low reverse clutch solenoid valve
^ Vehicle speed sensor A/T (revolution sensor)
^ Vehicle speed sensor MTR
No Tools
Execute the self-diagnosis. Is a malfunction indicated in the results?
Yes or No
YES >> Check the malfunctioning system(s). Refer to "DTC P0720 VEHICLE SPEED SENSOR A/T (REVOLUTION SENSOR)", "DTC P1721 VEHICLE SPEED SENSOR MTR", "DTC P1767 HIGH AND LOW REVERSE CLUTCH SOLENOID VALVE".
NO >> GO TO 2.

2. CHECK SYMPTOM
Check again.
OK or NG
OK >> INSPECTION END
NG >> GO TO 3.

3. CHECK TCM INSPECTION
1. Perform TCM input/output signal inspection.
2. If NG, recheck TCM pin terminals for damage or loose connection with harness connector.
OK or NG
OK >>INSPECTION END
NG >>
1. Repair or replace damaged parts.
2. Replace the transmission assembly. Refer to "Precautions for A/T Assembly Replacement".