JUDDER UPON TORQUE CONVERTER CLUTCH (TCC) OPERATION [FW6A-EL]

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2014 - Mazda6 - Transmission/Transaxle


TROUBLESHOOTING ITEM	Judder upon torque converter clutch (TCC) operation
DESCRIPTION	Vehicle jolts when TCC is engaged.
POSSIBLE CAUSE	Signal malfunction APP sensor malfunction CKP sensor malfunction Torque converter malfunction

CAUTION:

Verify the malfunction symptom according to not only the PID value but also the symptom troubleshooting.

Related PCM PIDs


Item (definition)	Unit/Condition	Definition	Condition/Specification (Reference)
APP	%	Accelerator pedal position	Accelerator pedal released: Approx. 0% Accelerator pedal depressed: Approx. 100%
RPM	RPM	Engine speed	Displays engine speed

Item (definition)

Unit/Condition

Definition

Condition/Specification (Reference)

APP

Accelerator pedal position

Accelerator pedal released: Approx. 0%

Accelerator pedal depressed: Approx. 100%

RPM

Engine speed

Displays engine speed

Diagnostic procedure


STEP	INSPECTION		ACTION
1	VERIFY MALFUNCTION SYMPTOM Is the malfunction symptom at the same level compared to a vehicle of the same model?	Yes	Symptom troubleshooting is completed.
1		No	Go to the next step.
2	INSPECT SIGNAL PARTS FOR MALFUNCTION Inspect the value at the following PCM PIDs using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-G 2.5].) APP (APP sensor) RPM (CKP sensor) Is there any malfunction?	Yes	Repair or replace any malfunctioning parts according to the inspection result.
2		No	Replace the automatic transaxle. (See AUTOMATIC TRANSAXLE REMOVAL/INSTALLATION [FW6A-EL].)

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