Toyota Venza manuals

Toyota Venza: Terminals Of Ecu

TERMINALS OF ECU

1. CHECK POWER BACK DOOR ECU (POWER BACK DOOR MOTOR UNIT) (w/ POWER BACK DOOR SYSTEM)


(a) Disconnect the L20 power back door 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

L20-12 (B) - Body ground

LG - Body ground

Battery power supply

Always

11 to 14 V

L20-10 (ECUB) - Body ground

P - 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

L20-11 (GND) - Body ground

W-B - Body ground

Ground

Always

Below 1 Ω

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

(c) Reconnect the L20 power back door 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

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

L - G

Back door lock motor circuit

Back door lock motor operating

11 to 14 V

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

L - G

Back door lock motor circuit

Back door lock motor not operating

Below 1 V

L20-20 (FUL) - Body ground

GR - Body ground

Back door courtesy switch circuit

Back door closed

11 to 14 V

L20-20 (FUL) - Body ground

GR - Body ground

Back door courtesy switch circuit

Back door open

Below 1 V

L20-22 (HAF) - Body ground

LG - Body ground

Back door lock half-latch switch signal circuit

Back door open → Back door closer operates → Back door closed

Below 1 V → 11 to 14 V → Below 1 V

L20-24 (POS) - Body ground

P - Body ground

Back door lock position switch signal circuit

Back door open → Back door closer operates → Back door closed

Below 1 V → 11 to 14 V → Below 1 V

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

2. BACK DOOR CLOSER ECU (MULTIPLEX NETWORK DOOR ECU) (w/o POWER BACK DOOR SYSTEM)


(a) Disconnect the L21 back door closer 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

L21-4 (B) - Body ground

LG - Body ground

Battery power supply

Always

11 to 14 V

L21-16 (ECUB) - Body ground

P - Body ground

Battery power supply

Always

11 to 14 V

L21-15 (IG) - Body ground

SB - Body ground

IG power supply

Ignition switch ON

11 to 14 V

L21-15 (IG) - Body ground

SB - Body ground

IG power supply

Ignition switch off

Below 1 V

L21-3 (GND) - Body ground

W-B - Body ground

Ground

Always

Below 1 Ω

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

(c) Reconnect the L21 back door closer ECU connector.

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

Tester Connection

Wiring Color

Terminal Description

Condition

Specified Condition

L21-2 (DC+) - L21-1 (DC-)

L - G

Back door lock motor circuit

Back door lock motor operating

11 to 14 V

L21-2 (DC+) - L21-1 (DC-)

L - G

Back door lock motor circuit

Back door lock motor not operating

Below 1 V

L21-6 (FUL) - Body ground

GR - Body ground

Back door courtesy switch circuit

Back door closed

11 to 14 V

L21-6 (FUL) - Body ground

GR - Body ground

Back door courtesy switch circuit

Back door open

Below 1 V

L21-5 (HAF) - Body ground

LG - Body ground

Back door lock half-latch switch signal circuit

Back door open → Back door closer operates → Back door closed

Below 1 V → 11 to 14 V → Below 1 V

L21-7 (POS) - Body ground

P - Body ground

Back door lock position switch signal circuit

Back door open → Back door closer operates → Back door closed

Below 1 V → 11 to 14 V → Below 1 V

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

3. 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

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

D49-2 (BDSU) - Body ground

GR - Body ground

Back door opener switch signal circuit

Back door opener switch off

Pulse generation

D49-2 (BDSU) - Body ground

GR - Body ground

Back door opener switch signal circuit

Back door opener switch on

Below 1 V

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

Problem Symptoms Table
PROBLEM SYMPTOMS TABLE HINT: Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are lis ...

Diagnosis System
DIAGNOSIS SYSTEM 1. DESCRIPTION (a) The power back door ECU (power back door motor unit)*1 or back door closer ECU (multiplex network door ECU)*2 controls the vehicle's back door closer system ...

Other materials about Toyota Venza:

Passenger Airbag ON/OFF Indicator Circuit Malfunction (B1660/43)
DESCRIPTION The passenger airbag ON/OFF indicator circuit consists of the center airbag sensor assembly and accessory meter assembly (passenger airbag ON/OFF indicator). The passenger airbag ON/OFF indicator indicates the operation condition of the front ...

Rear window defogger
Clear the rear window using the defogger. On/off The defogger will automatically turn off after 15 or 60 minutes. This operation time changes according to the ambient temperature and vehicle speed. Pressing the switch again also turns the defogger off. ...

Transponder Key Amplifier
Components COMPONENTS ILLUSTRATION Removal REMOVAL PROCEDURE 1. REMOVE FRONT DOOR SCUFF PLATE 2. REMOVE COWL SIDE TRIM SUB-ASSEMBLY 3. REMOVE LOWER NO. 1 INSTRUMENT PANEL FINISH PANEL 4. REMOVE LOWER STEERING COLUMN COVER 5. REMOVE ...

© 2016-2022 Copyright www.tovenza.com

0.1733