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NO.6 LOW MAXIMUM SPEED AND POOR ACCELERATION [FS5A-EL]

id050308801100

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 the engine circuit. 1. Clutch slippage, burnt • Line pressure low • Shift solenoid D malfunction • Shift solenoid A malfunction • Shift solenoid B malfunction • Shift solenoid C malfunction • Shift solenoid F malfunction • Pressure control solenoid A malfunction • Body GND malfunction • Control valve body malfunction 2. Signal malfunction • Vehicle speed sensor malfunction • Sensor GND malfunction • TP sensor malfunction • APP sensor malfunction • Input/turbine speed sensor malfunction 3. Transaxle fixed in 3GR (Operation of fail-safe function) • Short or open circuit in wiring harness • Poor connection of connector • Malfunction of electronic parts of output and input system 4. Transaxle fixed in 4GR (Operation of fail-safe function) • Forward clutch slippage • Vehicle speed sensor malfunction • Shift solenoid A malfunction (Stuck on) • Poor connection of connector 5. Insufficient starting torque (Suspected when in-gear condition, shift control and engine circuit are normal) • Torque converter malfunction (Poor operation, stuck) 6. Engagement of TCC operation range (Operation of fail-safe function) • Transaxle fluid temperature sensor malfunction (Short or open circuit) 7. Transaxle fixed in M range • M range switch malfunction 8. TR switch adjustment incorrect Note • Before following the troubleshooting steps, make sure that the Automatic Transaxle On-Board Diagnostic and Automatic Transaxle Basic Inspection are conducted.

Diagnostic procedure

STEP | INSPECTION | ACTION
--- | --- | ---
1 | With the ignition switch at the ON position, does the gear position indicator light indication correspond to the selector lever position? | Yes | Go to the next step.
No | Go to No.27 "GEAR POSITION INDICATOR LIGHT DOES NOT ILLUMINATE IN M RANGE" or No.28 "GEAR POSITION INDICATOR LIGHT ILLUMINATES IN D RANGE OR P, N, R POSITIONS"
2 | Go to No.12 "LACK/LOSS OF POWER". (See NO.12 LACK/LOSS OF POWER-ACCELERATION/CRUISE [L8, LF, L3].) Is the CIS system normal? | Yes | Go to the next step.
No | Repair or replace any malfunctioning parts.
3 | Disconnect the solenoid connector. Does the vehicle operate as follows? D range: 3GR (fixed) R position: Reverse | Yes | Go to the next step.
No | Overhaul the control valve body and repair or replace any malfunctioning parts. (See ATX workshop manual [FS5A-EL].) If any problem remains, overhaul the transaxle and repair or replace any malfunctioning parts. (See ATX workshop manual [FS5A-EL].)
4 | Drive the vehicle in D range. Does the vehicle start from stop in first gear? | Yes | Go to the next step.
No | Inspect the value at the following PCM and TCM PIDs using the WDS or equivalent. (See PCM INSPECTION [L8, LF, L3].) (See TCM INSPECTION [FS5A-EL].) PCM PIDs: • APP • TP REL TCM PIDs: • THOP • OSS • TSS • TR Repair or replace any malfunctioning parts.
5 | Inspect the value at the following TCM PIDs using the WDS or equivalent. (See TCM INSPECTION [FS5A-EL].) • SSA/SS1 • SSB/SS2 • SSC/SS3 • SSF_SS6 Are the PID values normal? | Yes | Go to the next step.
No | Inspect the value at the following PCM and TCM PIDs using the WDS or equivalent. (See PCM INSPECTION [L8, LF, L3].) (See TCM INSPECTION [FS5A-EL].) PCM PIDs: • APP • TP REL TCM PIDs: • THOP • OSS • TSS Repair or replace any malfunctioning parts.
6 | Perform the stall test. (See Stall Test.) Is stall speed normal? | Yes | Reverify symptoms of malfunction.
No | Overhaul the transaxle and repair or replace any malfunctioning parts. (See ATX workshop manual [FS5A-EL].)
7 | • Verify the test results. - If normal, return to the diagnostic index to service any additional symptoms. - If the malfunction remains, inspect the related Service information and perform repair or diagnosis. • If the vehicle is repaired, troubleshooting is completed. • If the vehicle is not repaired or additional diagnostic information is not available, replace the TCM.