LOW MAXIMUM SPEED AND POOR ACCELERATION [FW6A-EL]
id050315100900
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TROUBLESHOOTING ITEM |
Low maximum speed and poor acceleration |
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DESCRIPTION
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• Vehicle acceleration is poor at start.
• Delayed acceleration when accelerator pedal is depressed while driving.
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POSSIBLE CAUSE
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• Engine control system malfunction
• Signal malfunction
• Poor GND
• Torque converter malfunction
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Diagnostic procedure
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STEP |
INSPECTION |
ACTION |
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1
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INSPECT ENGINE CONTROL SYSTEM FOR MALFUNCTION
• Perform the symptom troubleshooting “NO.12 LACK/LOSS OF POWER-ACCELERATION/CRUISE”.
• Is there any malfunction?
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Yes
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Repair or replace any malfunctioning parts according to the inspection result.
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No
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Go to the next step.
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2
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INSPECT SIGNAL PARTS FOR MALFUNCTION
• Inspect the value at the following PCM PIDs using the M-MDS.
• Is there any malfunction?
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Yes
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Repair or replace any malfunctioning parts according to the inspection result.
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No
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Go to the next step.
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3
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VERIFY IF MALFUNCTION CAUSE IS TCM GND OR TORQUE CONVERTER
• Switch the ignition to off.
• Disconnect the TCM connector.
• Visually inspect for pin deformity, open circuit, or wiring harness non-insulation between TCM terminal 1B and body GND.
• Is there any malfunction?
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Yes
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Repair or replace any malfunctioning parts according to the inspection result.
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No
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Replace the automatic transaxle.
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