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

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


TROUBLESHOOTING ITEM	Torque converter clutch (TCC) non-operation
DESCRIPTION	TCC does not operate when vehicle reaches TCC operation range.
POSSIBLE CAUSE	Signal malfunction APP sensor malfunction Brake switch malfunction CKP sensor malfunction ECT sensor No.1 malfunction Poor GND Torque converter malfunction

TROUBLESHOOTING ITEM

Torque converter clutch (TCC) non-operation

DESCRIPTION

TCC does not operate when vehicle reaches TCC operation range.

POSSIBLE CAUSE

Signal malfunction

APP sensor malfunction
Brake switch malfunction
CKP sensor malfunction
ECT sensor No.1 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 %
BOO	OFF/ON	Brake pedal released: Off Brake pedal depressed: On
ECT	°C, °F	Displays the ECT
ECT	V	ECT is 20 °C {68 °F}: approx. 3.10 V ECT is 40 °C {104 °F}: approx. 2.16 V ECT is 60 °C {140 °F}: approx. 1.40 V ECT is 80 °C {176 °F}: approx. 0.87 V ECT is 100 °C {212 °F}: approx. 0.54 V
RPM	RPM	Displays the engine speed

Diagnostic procedure


STEP	INSPECTION		ACTION
1	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) BOO (Brake switch) ECT (ECT sensor No.1) RPM (CKP sensor) Is there any malfunction?	Yes	Repair or replace any malfunctioning parts according to the inspection result.
1		No	Go to the next step.
2	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.
2		No	Replace the torque converter. (See AUTOMATIC TRANSAXLE REMOVAL/INSTALLATION [FW6A-EL].)

TCM Removal/Installation [FS5 A EL]

CAUTION: Do not apply a shock to or touch the projection on the TCM, otherwise it may not operate normally. 1. Perform the following procedures. a. Remove the battery cover.. b. D ...

Transmission/Transaxle SST

1: Mazda SST number 2: Global SST number Example 1:49 UN30 3009 2:303-009 Crankshaft damper remover Clutch [G35M-R] 1:49 E011 1A0 2: ...

Other materials:

PID/Data Monitor Inspection [Two Step Deployment Control System]
1. Connect the M-MDS (IDS) to the DLC-2. 2. After the vehicle is identified, select the following items from the initialization screen of the IDS. a. Select “DataLogger”. b. Select “Modules”. c. Select “RCM”. 3. Select the applicable PID from the PID table. 4. Verify the PID data a ...

i-ELOOP
On conventional vehicles, the kinetic energy that is generated when the vehicle is decelerated by applying the brakes or during engine braking ends up being discarded as heat. By utilizing this discarded kinetic energy to generate electricity and use it to power the vehicle's electrical dev ...

Starting the Engine
WARNING Radio waves from the key may aff ect medical devices such as pacemakers: Before using the key near people who use medical devices, ask the medical device manufacturer or your physician if radio waves from the key will aff ect the device. NOTE The key mus ...