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

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:

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

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.
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 2.0].) APP (APP sensor) RPM (CKP sensor) Is there any malfunction?	Yes	Repair or replace any malfunctioning parts according to the inspection result.
2		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.
3		No	Replace the automatic transaxle. (See AUTOMATIC TRANSAXLE REMOVAL/INSTALLATION [FW6A-EL].)

Joint Shaft Assembly [Mzr 2.5 (ATX)]

1. Assemble in the order indicated in the table. 1 Bracket 2 Bearing . 3 Dust seal (RH) . 4 ...

Key Interlock System Inspection

Key Interlock System Inspection 1. Switch the ignition to ON. 2. Perform the following procedures to inspect the key interlock system. If there is any malfunction, inspect the key interlock ...

Other materials:

Crankshaft Position (CKP) Sensor Inspection [Mzr 2.0, Mzr 2.5]
Visual Inspection CAUTION: When foreign material such as an iron chip is on the CKP sensor, it can cause abnormal output from the sensor because of flux turbulence and adversely affect the engine control. Be sure there is no foreign material on the CKP sensor when replacing. ...

Air Bleeding
CAUTION: If the strainer is removed, impurities may penetrate the power steering system and damage it. To prevent this, always bleed air with the strainer installed. Do not maintain the steering wheel fully turned for 5 s or more. The oil temperature could rise and damage ...

Oil Seal (Differential) Replacement [G66 M R]
1. On level ground, jack up the vehicle and support it evenly on safety stands. 2. Remove the aerodynamic under cover No.2.. 3. Drain the oil from the transaxle.. 4. Remove the front splash shield.. 5. Separate the drive shaft and joint shaft from the transaxle.. 6. Remove the oil seals u ...