Mazda 3 Service Manual: 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

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

STEP

INSPECTION

ACTION

1

• 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 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

• 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].)