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12. A/T Does Not Shift: D 1 → D 2 Or Does Not Kickdown: D 4 → D 2 SYMPTOM: A/T does not shift from D 1 to D 2 at the specified speed. A/T does not shift from D 4 to D 2 when depressing accelerator pedal fully at the specified speed. Are 10. Vehicle Does Not Creep Forward 1 OK? Yes E No Go to 10. Vehicle Does 1 Does “ECU INPUT SIGNALS” in ----------------------------------------------------------------------------------------------------------------------- OR ----------------------------------------------------------------------------------------------------------------------- Does self-diagnosis show damage to No E Yes Check park/neutral position Check vehicle speed sensor ⋅ A/T (revolu- tion sensor) and vehicle speed ⋅ OK E NG Repair or replace vehicle ⋅ A/T (revolu- tion sensor) and vehicle ⋅ MTR. Refer Check throttle (accelerator) position sen- OK E NG Repair or replace throttle 1. Remove oil pan. OK E NG 1. Remove control valve. Refer to AT-118. 2. Check the following items: I Shift valve A I Shift solenoid valve A I Pilot valve I Pilot filter 3. Disassemble A/T. items: I Servo piston assembly I Brake band I Oil pump assembly 1. Remove control valve. Refer to AT-118. I Shift valve A I Shift solenoid valve A 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 SAT146BA NAT262 SAT171B H H H H H H H H DIAGNOSTIC PROCEDURES FOR SYMPTOMS AT-108 |