A/T Does Not Shift D1 To D2

TROUBLE DIAGNOSIS FOR SYMPTOMS


A/T Does Not Shift: D1 to D2


SYMPTOM:
The vehicle does not shift-up from the D1 to D2 gear at the specified speed.

DIAGNOSTIC PROCEDURE
1.CONFIRM THE SYMPTOM
Check if vehicle creeps forward in "D" or "L" 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" Or "L" Position, Vehicle Cannot Be Started From D1.
2.CHECK A/T FLUID LEVEL
Check the A/T fluid level. Refer to Inspections Before Trouble Diagnosis.
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 Service and Repair.
2. Disassemble A/T. Refer to Disassembly.
3. Check the following items:
- One-way clutch No.1. Refer to One-Way Clutch Outer Race Sub Assembly And 2nd Coast Brake Hub And One-Way Clutch No.1.
- One-way clutch No.2. Refer to Disassembly.
- 2nd coast brake. Refer to Service and Repair, One-Way Clutch Outer Race Sub Assembly And 2nd Coast Brake Hub And One-Way Clutch No.1.
- 2nd brake. Refer to Service and Repair.
OK or NG
OK - GO TO 5.
NG - Repair or replace damaged parts.
5.CHECK TCM
1. Check TCM input/output signal. Refer to 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.