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14. A/T Does Not Shift: D 3 → D 4 SYMPTOM: I A/T does not shift from D 3 to D 4 at the specified speed. I A/T must be warm before D 3 to D 4 shift will occur. Are 10. Vehicle Does Not Creep Forward 1 OK? Yes E No Go to 10. Vehicle Does 1 Does self-diagnosis, after cruise test, I Park/neutral position switch I Overdrive control switch I A/T fluid temperature sensor I Vehicle speed sensor ⋅ A/T (Revolu- tion sensor) I Shift solenoid valve A or B I Vehicle speed sensor ⋅ MTR No E Yes Check damaged circuit. Check throttle (accelerator) position sen- OK E NG Repair or replace throttle 1. Remove oil pan. OK E NG 1. Remove control valve assembly. Refer to 2. Check the following items: I Shift valve B I Overrun clutch control I Shift solenoid valve B I Pilot valve I Pilot filter 3. Disassemble A/T. items: I Servo piston assembly I Brake band I Torque converter I Oil pump assembly 1. Remove control valve assembly. Refer to AT-113. 2. Check the following items: I Shift valve B I Overrun clutch control valve I Shift solenoid valve B I Pilot valve I Pilot filter OK F OK Check again. OK E NG 1. Perform TCM input/ output signal inspection. 2. If NG, recheck TCM pin terminals for damage or INSPECTION END SAT833HA NAT262 SAT171B H H H H H H H DIAGNOSTIC PROCEDURES FOR SYMPTOMS AT-105 |