Dtc U0101 Lost Communication With Tcm. Corolla Auris

Двигатель. COROLLA, AURIS. ZZE150 ZRE151,152 NDE150
Система Управления Двигателем 1Nd-Tv. COROLLA, AURIS. ZZE150 ZRE151,152 NDE150

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK TCM (+B AND E1 TERMINALS)

CHECK HARNESS AND CONNECTOR (ECM - TCM)

REPLACE ECM

CHECK IF DTC RECURS

CHECK HARNESS OR CONNECTOR (TCM - BODY GROUND)

INSPECT FUSE (ECU-B2 FUSE)

DTC U0101 Lost Communication with TCM


DESCRIPTION

The Transmission Control Module (TCM) and ECM perform 2-way communications with each other via the Controller Area Network (CAN). The TCM sends signals to the ECM concerning required engine rpm, required engine torques, warning indicators in the combination meter, DTCs and other data. The ECM sends signals to the TCM concerning engine rpm, opening angles of the throttle valve, temperature of intake air, temperature of engine coolant, engine torques and other data. If the TCM cannot communicate with the ECM, the TCM will conclude that there is a malfunction in the CAN system, illuminate the MIL and set a DTC.

DTC No.
DTC Detection Condition
Trouble Area
U0101
No communication from TCM continues
  1. Open or short in TCM and ECM circuit
  2. TCM
  3. ECM

WIRING DIAGRAM


COROLLA, AURIS. ZZE150 ZRE151,152 NDE150.Система Управления Двигателем 1Nd-Tv.Система Ecd. Dtc U0101 Lost Communication With Tcm


INSPECTION PROCEDURE

1.CHECK TCM (+B AND E1 TERMINALS)


    COROLLA, AURIS. ZZE150 ZRE151,152 NDE150.Система Управления Двигателем 1Nd-Tv.Система Ecd. Dtc U0101 Lost Communication With Tcm

  1. Disconnect the TCM connector.

  1. Turn the ignition switch to the ON position.

  1. Measure the voltage according to the value(s) in the table below.

    Standard voltage:
    Tester Connection
    		Condition
    		Specified Condition
    E33-1 (+B) - E33-6 (GND)
    		Always
    		9 to 14 V

  1. Turn the ignition switch off.

  1. Reconnect the TCM connector.



NG
Перейдите к шагу 5
OK


2.CHECK HARNESS AND CONNECTOR (ECM - TCM)


    COROLLA, AURIS. ZZE150 ZRE151,152 NDE150.Система Управления Двигателем 1Nd-Tv.Система Ecd. Dtc U0101 Lost Communication With Tcm

  1. Disconnect the TCM connector.

  1. Disconnect the ECM connector.

  1. Measure the resistance according to the value(s) in the table below.

    Standard resistance (check for open):
    Tester Connection
    		Condition
    		Specified Condition
    A57-43 (CAN+) - A34-1 (CAN+)
    		Always
    		Below 1 Ω
    A57-64 (CAN-) - A34-2 (CAN-)
    		Always
    		Below 1 Ω
    Standard resistance (check for short):
    Tester Connection
    		Condition
    		Specified Condition
    A57-43 (CAN+) or A34-1 (CAN+) - Body ground
    		Always
    		10 kΩ or higher
    A57-64 (CAN-) or A34-2 (CAN-) - Body ground
    		Always
    		10 kΩ or higher

  1. Reconnect the TCM connector.

  1. Reconnect the ECM connector.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (ECM - TCM)
OK


3.REPLACE ECM

  1. Replace the ECM (See page Нажмите здесь).

    ПРЕДОСТЕРЕЖЕНИЕ:
    Replace the ECM with a normally functioning ECM of the same model vehicle.

NEXT


4.CHECK IF DTC RECURS

  1. Connect the intelligent tester to the DLC3.

  1. Clear the DTCs (See page Нажмите здесь).

  1. Start the engine.

  1. Enter the following menu items: Powertrain / Engine and ECT / DTC.

  1. Read the DTCs.

    Result:
    Result
    		Proceed to
    DTC U0101 is output
    		A
    DTC is not ouptut
    		B


B
END
A

REPLACE TCM (for C53A) (Нажмите здесь)

5.CHECK HARNESS OR CONNECTOR (TCM - BODY GROUND)


    COROLLA, AURIS. ZZE150 ZRE151,152 NDE150.Система Управления Двигателем 1Nd-Tv.Система Ecd. Dtc U0101 Lost Communication With Tcm

  1. Disconnect the TCM connector.

  1. Measure the resistance according to the value(s) in the table below.

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Condition
    E33-6 (GND) - Body ground
    		Always
    		Below 1 Ω

  1. Reconnect the TCM connector.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (TCM - BODY GROUND)
OK


6.INSPECT FUSE (ECU-B2 FUSE)


    COROLLA, AURIS. ZZE150 ZRE151,152 NDE150.Система Управления Двигателем 1Nd-Tv.Система Ecd. Dtc U0101 Lost Communication With Tcm

  1. Remove the ECU-B2 fuse from the engine room relay block.

  1. Measure the resistance according to the value(s) in the table below.

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Condition
    ECU-B2 fuse
    		Always
    		Below 1 Ω

  1. Reinstall the ECU-B2 fuse.



NG
REPLACE FUSE (ECU-B2 FUSE)
OK

REPAIR OR REPLACE HARNESS OR CONNECTOR (TCM - BATTERY)