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:

Buckle Switch Inspection
Driver Side 1. Switch the ignition to off. 2. Disconnect the negative battery cable.. 3. Remove the front seat.. 4. Remove the front buckle.. 5. Inspect for continuity between the buckle switch terminals using a tester. If not as indicated in the table, replace the driver sid ...

Front Shock Absorber And Coil Spring Removal/Installation
CAUTION: Performing the following procedures without first removing the ABS wheel-speed sensor may possibly cause an open circuit in the wiring harness if it is pulled by mistake. Before performing the following procedures, disconnect the ABS wheel-speed sensor wiring harness connec ...

Clock Spring Inspection [Standard Deployment Control System]
1. Disconnect the negative battery cable.. 2. Remove the driver–side air bag module.. 3. Remove the steering wheel.. 4. Remove the column cover. 5. Remove the clock spring.. 6. Verify that the continuity is as indicated in the table. If not as indicated in the table, replace the cl ...

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