Toyota Corolla Cross Owners & Service Manuals

Toyota Corolla Cross: Terminals Of Ecu

TERMINALS OF ECU

CHECK SLIDING ROOF ECU (SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY)

(a) Disconnect the T12 sliding roof ECU (sliding roof drive gear sub-assembly) connector.

(b) Measure the resistance and voltage according to the value(s) in the table below.

HINT:

Measure the values on the wire harness side with the connector disconnected.

Terminal No. (Symbol)

Terminal Description

Condition

Specified Condition

T12-1 (B) - T12-2 (E)

Auxiliary battery power supply

Ignition switch off

11 to 14 V

T12-2 (E) - Body ground

Ground

Always

Below 1 Ω

(c) Reconnect the M3 sliding roof ECU (sliding roof drive gear sub-assembly) connector.

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

Terminal No. (Symbol)

Terminal Description

Condition

Specified Condition

T12-10 (OPN) - T12-2 (E)

Sliding roof motor open

Ignition switch ON, OPEN switch on

Below 1 V

Ignition switch ON, OPEN switch off

11 to 14 V

T12-8 (CLS) - T12-2 (E)

Sliding roof motor close

Ignition switch ON, CLOSE switch on

Below 1 V

Ignition switch ON, CLOSE switch off

11 to 14 V

T12-5 (UP) - T12-2 (E)

Sliding roof motor up

Ignition switch ON, UP switch on

Below 1 V

Ignition switch ON, UP switch off

11 to 14 V

T12-9 (DWN) - T12-2 (E)

Sliding roof motor down

Ignition switch ON, DOWN switch on

Below 1 V

Ignition switch ON, DOWN switch off

11 to 14 V

(e) Measure the pulse according to the value(s) in the table below.

Terminal No. (Symbol)

Terminal Description

Condition

Specified Condition

T12-7 (MPX1) - Body ground

LIN communication line

Ignition switch ON

Pulse generation

CHECK POWER DISTRIBUTION BOX ASSEMBLY AND MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

*1

Power Distribution Box Assembly

*2

Main Body ECU (Multiplex Network Body ECU)

(a) Remove the main body ECU (multiplex network body ECU) from the power distribution box assembly.

(b) Reconnect the power distribution box assembly connectors.

(c) Measure the voltage and resistance according to the value(s) in the table below.

HINT:

Measure the values on the wire harness side with the connectors connected.

Terminal No. (Symbol)

Terminal Description

Condition

Specified Condition

MB-13 (GND1) - Body ground

Ground

Always

Below 1 Ω

MB-14 (GND2) - Body ground

Ground

Always

Below 1 Ω

MB-26 (BECU) - Body ground

Auxiliary battery power supply

Ignition switch off

11 to 14 V

MB-27 (IGR) - Body ground

IG power supply

Ignition switch ON

11 to 14 V

Ignition switch off

Below 1 V

(d) Reconnect the MB main body ECU (multiplex network body ECU) connector.

(e) Check for pulses according to the value(s) in the table below.

Terminal No. (Symbol)

Terminal Description

Condition

Specified Condition

8F-3 (FLCY) - Body ground

Front door courtesy light switch (for LH) input

Front door LH open → closed

Below 1 V → 11 to 14 V or pulse output (maximum 14 V)*

8F-5 (FRCY) - Body ground

Front door courtesy light switch (for RH) input

Front door RH open → closed

Below 1 V → 11 to 14 V or pulse output (maximum 14 V)*

8B-37 (LIN2) - Body ground

LIN communication line

Ignition switch ON

Pulse generation

  • *: Differs depending on the vehicle model

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