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

2016 – MX-5 – Transmission/Transaxle

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. (See SELECTOR LEVER INSPECTION.) (See TRANSMISSION RANGE (TR) SWITCH INSPECTION [SJ6A-EL].) (See TRANSMISSION RANGE (TR) SWITCH ADJUSTMENT [SJ6A-EL].)
2	Inspect the following solenoid: (See SOLENOID VALVE INSPECTION [SJ6A-EL].) 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 REMOVAL/INSTALLATION [SJ6A-EL].) (See Automatic Transmission Workshop Manual [SJ6A-EL].)
		No	Inspect the coupler component. If normal, replace the control valve body. (See CONTROL VALVE BODY REMOVAL [SJ6A-EL].) (See CONTROL VALVE BODY INSTALLATION [SJ6A-EL].)
3	Verify test results. If normal, return to the diagnostic index to service any additional symptoms. If malfunction remains, inspect the related Service Bulletins and/or On-line Repair 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].)