Toyota Venza manuals

Toyota Venza: Terminals Of Ecu

TERMINALS OF ECU

1. CHECK POWER BACK DOOR ECU (POWER BACK DOOR MOTOR UNIT)


(a) Disconnect the L20 ECU connector.

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

Tester Connection

Wiring Color

Terminal Description

Condition

Specified Condition

L20-10 (ECUB) - Body ground

P - Body ground

Battery power supply

Always

11 to 14 V

L20-12 (B) - Body ground

LG - Body ground

Battery power supply

Always

11 to 14 V

L20-8 (IG) - Body ground

SB - Body ground

IG power supply

Ignition switch ON

11 to 14 V

L20-8 (IG) - Body ground

SB - Body ground

IG power supply

Ignition switch off

Below 1 V

L20-17 (MSW) - Body ground

R - Body ground

Power back door main switch signal

Power back door main switch not pushed

Below 1 Ω

L20-17 (MSW) - Body ground

R - Body ground

Power back door main switch signal

Power back door main switch pushed

10 kΩ or higher

L20-4 (DS1) - Body ground

L - Body ground

Power back door closer switch signal

Power back door closer switch on

Below 1 Ω

L20-4 (DS1) - Body ground

L - Body ground

Power back door closer switch signal

Power back door closer switch off

10 kΩ or higher

L20-15 (OSL) - L20-14 (OSE)

Y - V

Power back door touch sensor LH signal

Power back door touch sensor LH not pressed

950 to 1050 Ω

L20-15 (OSL) - L20-14 (OSE)

Y - V

Power back door touch sensor LH signal

Back door touch sensor LH pressed

Below 100 Ω

L20-13 (OSR) - L20-14 (OSE)

R - V

Power back door touch sensor RH signal

Back door touch sensor RH not pressed

950 to 1050 Ω

L20-13 (OSR) - L20-14 (OSE)

R - V

Power back door touch sensor RH signal

Power back door touch sensor RH pressed

Below 100 Ω

L20-11 (GND) - Body ground

W-B - Body ground

Ground

Always

Below 1 Ω

If the result is not as specified, there may be a malfunction on the wire harness side.

(c) Reconnect the L20 ECU connector.

(d) Initialize the power back door system (See page ).


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

Tester Connection

Wiring Color

Terminal Description

Condition

Specified Condition

L20-17 (MSW) - Body ground

R - Body ground

Power back door main switch signal

Power back door main switch not pushed

Below 1 V

L20-17 (MSW) - Body ground

R - Body ground

Power back door main switch signal

Power back door main switch pushed

Pulse generation

L20-26 (BZR+) - Body ground

SB - Body ground

Power back door warning buzzer signal input

Back door warning buzzer sounding

Pulse generation

L20-26 (BZR+) - Body ground

SB - Body ground

Power back door warning buzzer signal input

Back door warning buzzer stopped

Below 1 V

L20-2 (DC+) - L20-1 (DC-)

L - G

Power back door lock motor signal

Back door lock motor operating

11 to 14 V

L20-2 (DC+) - L20-1 (DC-)

L - G

Power back door lock motor signal

Back door lock motor stopped

Below 1 V

L20-4 (DS1) - Body ground

L - Body ground

Power back door closer switch signal

Power back door closer switch on

Below 1 V

L20-4 (DS1) - Body ground

L - Body ground

Power back door closer switch signal

Power back door closer switch off

Pulse generation

L20-15 (OSL) - L20-14 (OSE)

Y - V

Power back door touch sensor LH signal

Power back door touch sensor LH not pressed

4 to 6 V

L20-15 (OSL) - L20-14 (OSE)

Y - V

Power back door touch sensor LH signal

Back door touch sensor LH pressed

Below 1 V

L20-13 (OSR) - L20-14 (OSE)

R - V

Power back door touch sensor RH signal

Back door touch sensor RH not pressed

4 to 6 V

L20-13 (OSR) - L20-14 (OSE)

R - V

Power back door touch sensor RH signal

Power back door touch sensor RH pressed

Below 1 V

If the result is not as specified, the ECU may have a malfunction.

2. CHECK MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK ASSEMBLY)


(a) Disconnect the D49 and 2F connectors.

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

Tester Connection

Wiring Color

Terminal Description

Condition

Specified Condition

D49-2 (BDSU) - Body ground

GR - Body ground

Back door opener switch signal circuit

Back door opener switch on

Below 1 Ω

D49-2 (BDSU) - Body ground

GR - Body ground

Back door opener switch signal circuit

Back door opener switch off

10 kΩ or higher

D49-26 (PBDS) - Body ground

BR - Body ground

Power back door open / close switch signal circuit

Power back door open / close switch on

Below 1 Ω

D49-26 (PBDS) - Body ground

BR - Body ground

Power back door open / close switch signal circuit

Power back door open / close switch off

10 kΩ or higher

2F-16 (GND1) - Body ground

W-B - Body ground

Ground

Always

Below 1 Ω

If the result is not as specified, there may be a malfunction on the wire harness side.

(c) Reconnect the D49 and 2F connectors.

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

Tester Connection

Wiring Color

Terminal Description

Condition

Specified Condition

D49-26 (PBDS) - Body ground

BR - Body ground

Power back door control switch signal

Power back door control switch on

Below 1 V

D49-26 (PBDS) - Body ground

BR - Body ground

Power back door control switch signal

Power back door control switch off

Pulse generation

D49-2 (BDSU) - Body ground

GR - Body ground

Back door opener switch signal

Back door opener switch on

Below 1 V

D49-2 (BDSU) - Body ground

GR - Body ground

Back door opener switch signal

Back door opener switch off

Pulse generation

If the result is not as specified, the ECU may have a malfunction.

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