Mazda 3 manuals

Mazda 3 Service Manual: Judder Upon Torque Converter Clutch (TCC) Operation [Fw6 A EL]

Mazda 3 Service Manual / Drivetrain / Transmission/Transaxle / Automatic / Judder Upon Torque Converter Clutch (TCC) Operation [Fw6 A EL]


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

  • Poor GND

  • Torque converter malfunction


CAUTION:

Related PIDs


Monitor item (Definition)

Unit/Condition

Condition/Specification (Reference)

APP

%

  • Accelerator pedal released: approx. 0 %

  • Accelerator pedal depressed: approx. 100 %

RPM

RPM

  • Displays the 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.

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 2.0].)

    • APP (APP sensor)

    • RPM (CKP sensor)

  • Is there any malfunction?

Yes

Repair or replace any malfunctioning parts according to the inspection result.

No

Go to the next step.

3

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?

Yes

Repair or replace any malfunctioning parts according to the inspection result.

No

Replace the automatic transaxle.

(See AUTOMATIC TRANSAXLE REMOVAL/INSTALLATION [FW6A-EL].)


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