Mazda 3 manuals

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


CAUTION:

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

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.

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.

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 Glass Installation
WARNING: Using a utility knife with bare hands can cause injury. Always wear gloves when using a utility knife. CAUTION: Proper installation of the glass may be difficult if sealant is cracked or the glass is pushed out by air pressure when a door is opened/closed with al ...

Steering Switch Inspection
Without Bluetooth System WARNING: Handling the air bag module improperly can accidentally deploy the air bag module, which may seriously injure you. Read the air bag system service warnings and cautions before handling the air bag module.. 1. Disconnect the negative battery cabl ...

Manual Transaxle Oil Replacement [C66 M R]
1. Park the vehicle on level ground. 2. Remove the aerodynamic under cover No.2.. 3. Remove the drain plug and gasket, and drain the manual transaxle oil. 4. Install a new gasket and the drain plug. Tightening torque 39—59 N·m {4.0—6.0 kgf·m, 29—43 ft·lbf} 5. Remove the oil ...

© 2016-2025 Copyright www.mazda3tech.com