NO.2 VEHICLE MOVES IN N POSITION [SJ6A-EL]


id050307800700

2
Vehicle moves in N position
DESCRIPTION
•  Vehicle creeps in N position.
•  Vehicle creeps if brake pedal is not depressed in N position.
POSSIBLE CAUSE
•  If the vehicle moves in N position, basically, the malfunction is in the AT. Since a malfunction in the sensor circuit or output circuit is the cause of the malfunction in the AT, inspect the sensors, output circuit, and the related wiring harnesses.
―  Clutch burnt (C1 clutch, C4 clutch, One-way clutch)
•  Line pressure low
•  Shift solenoid B malfunction
•  Shift solenoid C malfunction
•  Shift solenoid E malfunction
•  Shift solenoid G malfunction
•  Control valve body malfunction
―  Selector lever position disparity (Although the selector indicator shows N position, the hydraulic circuit shows D or R position)
•  TR switch mis-adjustment

Diagnostic procedure

STEP

INSPECTION

ACTION

1
•  Does the vehicle creep when selector lever is moved slightly in N position?
Yes
Go to the next step.
No
Inspect and adjust the selector lever and TR switch.
2
•  Inspect the following solenoid:
―  Shift solenoid B
―  Shift solenoid C
―  Shift solenoid E
―  Shift solenoid G
•  Are these solenoids normal?
Yes
Overhaul the transmission and repair or replace any malfunctioning parts (clutch slippage, worm).
(See Automatic Transmission Workshop Manual [SJ6A-EL].)
No
Inspect the coupler component.
•  If normal, replace the control valve body.
3
•  Verify test results.
―  If normal, return to the diagnostic index to service any additional symptoms.
―  If malfunction remains, inspect the related Service Information and perform repair or diagnosis.
•  If the vehicle is repaired, troubleshooting completed.
•  If the vehicle is not repaired or additional diagnostic information is not available, replace the TCM. (See TCM REMOVAL/INSTALLATION [SJ6A-EL].)