NO.6 LOW MAXIMUM SPEED AND POOR ACCELERATION (GENERAL (L.H.D.) SPECS. SPORT AT) [FN4A-EL]


6	Low maximum speed and poor acceleration
DESCRIPTION	• Vehicle acceleration is poor at start. • Delayed acceleration when accelerator pedal is depressed while driving.
POSSIBLE CAUSE	• If the clutch is stuck or does not stay in 3GR, the malfunction is in engine circuit. 1. Clutch slipped, burned • Line pressure low • Shift solenoid D malfunction • Shift solenoid E malfunction • Shift solenoid A malfunction • Shift solenoid B malfunction • Shift solenoid C malfunction • Pressure control solenoid malfunction • Body GND malfunction • Control valve body malfunction 2. Signal malfunction • Vehicle speed sensor malfunction • Sensor GND malfunction • Accelerator pedal position sensor malfunction • TP sensor malfunction • Input/turbine speed sensor malfunction 3. Transaxle fixed in 3GR (Operation of fail-safe function) • Short or open circuit in wiring • Poor connection of connector • The electronic parts of output and input system have malfunction 4. Insufficient starting torque (Suspected when in-gear condition, shift control and engine circuit are normal) • The torque converter have malfunction (Poor operation, stuck) 5. Engagement of TCC operation range (Operation of fail-safe function) • Transaxle fluid temperature sensor malfunction (Short or open circuit) 6. Transaxle fixed in M range • M range switch malfunction 7. TR switch adjustment incorrect Note • Before following troubleshooting steps, make sure that Automatic Transaxle On-Board Diagnostic and Automatic Transaxle Basic Inspection are conducted. (See BASIC INSPECTION (GENERAL (L.H.D.) SPECS. SPORT AT) [FN4A-EL].)


STEP	INSPECTION		ACTION
1	With ignition switch at ON, does gear position indicator light indication correspond to selector lever position?	Yes	Go to next step.
1		No	Go to No.27 "GEAR POSITION INDICATOR LIGHT DOES NOT ILLUMINATE IN M RANGE", or No.30 "GEAR POSITION INDICATOR LIGHT ILLUMINATES IN D RANGE OR P, N, R POSITIONS."
2	Go to No.12 "LACK/LOSS OF POWER-ACCELERATION/CRUISE". (See NO.12 LACK/LOSS OF POWER-ACCELERATION/CRUISE [LF, L3].) Is CIS system okay?	Yes	Go to next step.
2		No	Repair or replace any defective parts.
3	Disconnect transaxle connector. Does vehicle operate as follows? D range: 3GR (fixed) R position: Reverse	Yes	Go to next step.
3		No	Overhaul control valve body and repair or replace any defective parts. (See ATX Workshop Manual (FN4A-EL).) If problem remains, overhaul transaxle and repair or replace any defective parts.
4	Drive vehicle in D range. Does vehicle start from stop in first gear?	Yes	Go to next step.
4		No	Check the value at the following. PCM PIDs (using WDS or equivalent): • APP1 • APP2 • TP_REL • VSS Terminal voltage: • TCM terminal 2I, 2K (TSS sensor) • TCM terminal 2H (TR switch) (See TCM INSPECTION (GENERAL (L.H.D.) SPECS. SPORT AT) [FN4A-EL].) Repair or replace any defective parts.
5	Stop engine. Inspect shift solenoid A, B or C. Are they okay?	Yes	Go to next step.
5		No	Inspect for shift solenoid mechanical stuck. • If shift solenoids okay, inspect for open or short circuit between TCM connector terminals 1A, 1B, 1C and control valve body terminals A, C or G.
6	Perform the stall test. Is stall speed okay?	Yes	Reverify symptoms of malfunction.
6	Perform the stall test. Is stall speed okay?	No	Overhaul transaxle and repair or replace any defective parts. (See ATX Workshop Manual (FN4A-EL).)
7	• Verify test results. - If okay, return to diagnostic index to service any additional symptoms. - If malfunction remains, inspect related Service Bulletins and/or On-line Repair Information and perform repair or diagnosis. • If vehicle repaired, troubleshooting completed. • If vehicle not repaired or additional diagnostic information not available, replace TCM.