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:

Rear Window Wiper and Washer
The ignition must be switched ON to use the wiper. Rear Window Wiper Turn the wiper on by turning the rear wiper/washer switch Rear Window Washer To spray washer fluid, turn the rear wiper/ washer switch to the position. After the switch is released, the washer will stop. If the w ...

Light Bulbs
WARNING Do not replace the xenon fusion bulbs yourself: Replacing the xenon fusion bulbs yourself is dangerous. Because the xenon fusion bulbs require high voltage, you could receive an electric shock if the bulbs are handled incorrectly. Consult an Authorized ...

On Board Diagnostic System PID/Data Monitor Inspection [Fw6 A EL]
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 “TCM”. 3. Select the applicable PID from the PID table. 4. Verify the PID data a ...