A/T Does Not Shift: D4->D5

A/T Does Not Shift: D4 -> D5

SYMPTOM: The vehicle does not shift-up from the D. to D3 gear at the specified speed.

DIAGNOSTIC PROCEDURE
1. CONFIRM THE SYMPTOM
Check if vehicle creeps forward in "D" position and vehicle can be started from D1.
OK or NG
OK >>GO TO 2.
NG >>Refer to "Vehicle Does Not Creep Forward In "D" Position" ,AT-217 Vehicle Does Not Creep Forward In "D" Position, "Vehicle Cannot Be Started From D1" Vehicle Cannot Be Started From D1.

2. CHECK A/T FLUID LEVEL Check the A/T fluid level. Refer to "A/T FLUID CHECK".
OK or NG
OK >>GO TO 3.
NG >>Refill ATF.

3. CHECK SELF-DIAGNOSTIC RESULTS
Perform self-diagnosis.
Is any malfunction detected by self-diagnostic?
YES >>Check the malfunctioning system.
NO >>GO TO 4.

4. DETECT MALFUNCTIONING ITEM
1. Control valve assembly. Refer to "Control Valve Assembly".
2. Disassemble A/T. Refer to "DISASSEMBLY".
3. Check the following items:
^ Forward and direct clutch assembly. Refer to "DISASSEMBLY".
^ 2nd coast brake. Refer to "Oil Pump. 2nd Coast Brake & 2nd Brake", "One-Way Clutch Outer Race Sub Assembly & 2nd Coast Brake Hub & One-Way Clutch No.1".
^ One-way clutch No.1. Refer to "One-Way Clutch Outer Race Sub Assembly & 2nd Coast Brake Hub & One-Way Clutch No.1".
OK or NG
OK >>GO TO 5.
NG >>Repair or replace damaged parts.

5. CHECK TCM
1. Check TCM input/output signal. Refer to "TCM Input/Output Signal Reference Values". Pinout Values and Diagnostic Parameters
2. If NG, recheck TCM pin terminals for damage or loose connection with harness connector.
OK or NG
OK >>GO TO 6.
NG >>Repair or replace damaged parts.

6. CHECK SYMPTOM
Check again.
OK or NG
OK >> INSPECTION END
NG >>Repair or replace damaged parts.