A/T Does Not Shift: D4 -> D5

A/T Does Not Shift: D4 -> D5

SYMPTOM:
^ The vehicle does not shift-up from the D4 to D5 gear at the specified speed.
^ The vehicle does not shift-up from the D4 to D5 gear unless A/T is warmed up.

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 AT-187, "Vehicle Does Not Creep Forward In "D" Position". Vehicle Does Not Creep Forward In "D" Position
Refer to AT-189, "Vehicle Cannot Be Started From D1". Vehicle Cannot Be Started From D1

2. CHECK SELF-DIAGNOSTIC RESULTS
Perform self-diagnosis. Refer to AT-90, "SELF-DIAGNOSTIC RESULT MODE". Self-Diagnostic Result Mode
Is any malfunction detected by self-diagnostic results?
YES >> Check the malfunctioning system. Refer to AT-90, "SELF-DIAGNOSTIC RESULT MODE". Self-Diagnostic Result Mode
NO >> GO TO 3.

3. CHECK A/T FLUID LEVEL
Check A/T fluid level.
OK or NG
OK >> GO TO 4.
NG >> Refill ATF.

4. CHECK LINE PRESSURE
Check line pressure at the engine stall point. Refer to AT-55, "LINE PRESSURE TEST". Line Pressure Test
OK or NG
OK >> GO TO 7.
NG - 1 >> Line pressure high. GO TO 5.
NG - 2 >> Line pressure low. GO TO 6.

5. DETECT MALFUNCTIONING ITEM
1. Check control valve with TCM.
2. Disassemble A/T.
3. Check the following.
^ Oil pump assembly.
OK or NG
OK >> GO TO 7.
NG >> Repair or replace damaged parts.

6. DETECT MALFUNCTIONING ITEM
1. Check control valve with TCM.
2. Disassemble A/T.
3. Check the following.
^ Oil pump assembly.
^ Power train system.
^ Transmission case.
OK or NG
OK >> GO TO 7.
NG >> Repair or replace damaged parts.

7. CHECK A/T FLUID CONDITION
1. Remove oil pan.
2. Check A/T fluid condition. Refer to AT-54, "Fluid Condition Check". Fluid Condition Check
OK or NG
OK >> GO TO 8.
NG >> GO TO 11.

8. DETECT MALFUNCTIONING ITEM
^ Check the malfunction items. If any items are damaged, repair or replace damaged parts. Refer to AT-65, "Symptom Chart" (Symptom No.13). Symptom Chart
OK or NG
OK >> GO TO 9.
NG >> Repair or replace damaged parts.

9. CHECK SYMPTOM
Check again. Refer to AT-59, "Cruise Test - Part 1". Cruise Test - Part 1
OK or NG
OK >> INSPECTION END
NG >> GO TO 10.

10. PERFORM TCM INSPECTION
1. Perform TCM input/output signals inspection. Refer to AT-87, "TCM Input/Output Signal Reference Values". Pinout Values and Diagnostic Parameters
2. If NG, recheck A/T assembly harness connector terminals for damage or loose connection with harness connector.
OK or NG
OK >> INSPECTION END
NG >> Repair or replace damaged parts.

11. DETECT MALFUNCTIONING ITEM
^ Check the malfunction items. If any items are damaged, repair or replace damaged parts. Refer to AT-65, "Symptom Chart" (Symptom No.13). Symptom Chart
OK or NG
OK >> GO TO 9.
NG >> Repair or replace damaged parts.