Toyota Venza manuals

Toyota Venza: Terminals Of Ecu

TERMINALS OF ECU

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


(a) Disconnect the 2A and 2F main body ECU (driver side junction block assembly) connectors.

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

Standard Voltage

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

2A-1 - Body ground

B - Body ground

Battery power supply

Always

11 to 14 V

Standard Resistance

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

2F-16 - 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 2A and 2F main body ECU (driver side junction block assembly) connectors.

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

Standard Resistance

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

D49-18 (CLTE) - Body ground

Y - Body ground

Automatic light control ground

Always

Below 1 Ω

Standard Voltage

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

2C-7 (PKB) - Body ground

G - Body ground

Parking brake switch input

Parking brake switch on

Below 1 V

Parking brake switch off

Pulse generation

2C-23 (DIM) - Body ground

GR - Body ground

High beam headlight drive output

Dimmer switch in high or high flash position

Below 1 V

Dimmer switch in low position

Pulse generation

2F-5 (LSR) - Body ground

Y - Body ground

Rear door unlock detection switch LH or RH input

Rear door LH and RH locked

Pulse generation

Rear door LH or RH unlocked

Below 1 V

2G-35 (HRLY) - Body ground

GR - Body ground

Headlight relay drive output

Light control switch in head position

Below 1 V

Light control switch not in head position

11 to 14 V

2N-2 (HU) - Body ground

G - Body ground

Dimmer switch high position signal input

Dimmer switch in high or high flash position

Below 1 V

Dimmer switch in low position

Pulse generation

2O-5 (LSR) - Body ground

BR - Body ground

Rear door unlock detection switch LH or RH input

Rear door LH and RH locked

Pulse generation

Rear door LH or RH unlocked

Below 1 V

2O-19 (LCTY) - Body ground

R - Body ground

Rear door courtesy light switch LH input

Rear door LH open

Below 1 V

Rear door LH closed

Pulse generation

D49-3 (MILE)*1 - Body ground

LG - Body ground

Door mirror foot light drive output

Door mirror foot light off

Below 1 V

Door mirror foot light on

11 to 14 V

D49-7 (RCTY) - Body ground

GR - Body ground

Rear door courtesy light switch RH input

Rear door RH open

Below 1 V

Rear door RH closed

Pulse generation

D49-17 (HEAD) - Body ground

V - Body ground

Light control switch head position input

Light control switch in head position

Below 1 V

Light control switch not in head position

Pulse generation

D49-19 (CLTS) - Body ground

V - Body ground

Automatic light control sensor signal input

Ignition switch off

Below 1 V

Automatic light control system operates

Pulse generation

(See waveform 1)

D49-20 (CLTB) - Body ground

GR - Body ground

Automatic light control sensor power supply output

Ignition switch off

Below 1 V

Ignition switch ON and light control switch in AUTO position

11 to 14 V

D49-21 (PCTY) - Body ground

V - Body ground

Front passenger side door courtesy light switch input

Front passenger side door open

Below 1 V

Front passenger side door closed

Pulse generation

D49-25 (BCTY) - Body ground

GR - Body ground

Back door courtesy switch input

Back door open

Below 1 V

Back door closed

11 to 14 V

D49-27 (LSWP) - Body ground

P - Body ground

Front passenger side door unlock detection switch input

Front passenger side door locked

Pulse generation

Front passenger side door unlocked

Below 1 V

D49-28 (FFOG) - Body ground

R - Body ground

Front fog light switch input

Front fog light switch on

Below 1 V

Front fog light switch off

Pulse generation

D50-4 (FFGO) - Body ground

GR - Body ground

Front fog light relay drive output

Light control switch in head position and front fog light switch on

Below 1 V

Front fog light switch off

11 to 14 V

D50-9 (LSWD) - Body ground

P - Body ground

Driver side door unlock detection switch input

Driver side door locked

Pulse generation

Driver side door unlocked

Below 1 V

D50-13 (HF) - Body ground

SB - Body ground

Dimmer switch high flash position signal input

Dimmer switch in high flash position

Below 1 V

Dimmer switch not in high flash position

Pulse generation

D50-21 (A) - Body ground

BR - Body ground

Light control switch AUTO position signal input

Light control switch in AUTO position

Below 1 V

Light control switch not in AUTO position

Pulse generation

D50-23 (TAIL) - Body ground

R - Body ground

Light control switch tail position signal input

Light control switch in tail or head position

Below 1 V

Light control switch in neither tail nor head position

Pulse generation

D50-24 (DCTY) - Body ground

V - Body ground

Driver side door courtesy light switch input

Driver side door open

Below 1 V

Driver side door closed

Pulse generation

D51-10 (DRL) - Body ground

G - Body ground

Daytime running light system drive output

Daytime running light system operating

Below 1 V

Daytime running light system not operating

11 to 14 V

  • *1: w/o Seat Position Memory

If the result is not as specified, the main body ECU (Driver side junction block assembly) may have a malfunction.

(1) Waveform 1


Item

Content

Tool setting

5 V/DIV., 5 ms./DIV.

HINT:

If the ambient light becomes brighter, width A becomes narrower.

2. CHECK HEADLIGHT LEVELING ECU ASSEMBLY

(a) Disconnect the A40 headlight leveling ECU assembly connector.


(b) Measure the voltage and resistance between the specified terminals of the wire harness side connectors and body ground.

Standard Voltage

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

A40-1 (IG) - Body ground

L - Body ground

IG power supply

Ignition switch off

Below 1 V

Ignition switch ON

11 to 14 V

Standard Resistance

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

A40-9 (E1) - 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 A40 headlight leveling ECU assembly connector.

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

Standard Resistance

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

A40-21 (SGR) - Body ground

LG - Body ground

Rear height control sensor ground

Always

Below 1 Ω

A40-23 (RH-) - Body ground

Y - Body ground

Leveling motor RH ground

Always

Below 1 Ω

A40-24 (LH-) - Body ground

R - Body ground

Leveling motor LH ground

Always

Below 1 Ω

Standard Voltage

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

A40-3 (B2) - Body ground

LG - Body ground

Low beam headlight signal input

Low beam headlights on

Below 1.5 V

Low beam headlights off

Above 5 V

A40-15 (PRST) - Body ground

Y - Body ground

Initialization signal input

Terminal LVL and terminal GND of DLC3 connected

Below 1 V

Terminal LVL and terminal GND of DLC3 not connected

Approx. 5 V

A40-6 (WNG) - Body ground

BR - Body ground

Indicator light drive output

Indicator light on

11 to 14 V

Indicator light off

Below 1 V

A40-10 (RH+) - Body ground

R - Body ground

Leveling motor RH power supply

Ignition switch off

Below 1 V

Ignition switch ON

10 to 16 V

A40-11 (LH+) - Body ground

P - Body ground

Leveling motor LH power supply

Ignition switch off

Below 1 V

Ignition switch ON

10 to 16 V

A40-12 (SBR) - Body ground

BR - Body ground

Rear height control sensor power supply

Ignition switch off

Below 1 V

Ignition switch ON

4.75 to 5.25 V

A40-16 (SPDR) - Body ground

GR - Body ground

Vehicle speed signal input

Vehicle is driven at approx. 20 km/h (12mph)

Pulse generation

(See waveform 1)

A40-17 (RHT) - Body ground

G - Body ground

Leveling motor RH operation signal input

With low beam headlights on, vehicle height not changed

Below 1 V

With low beam headlights on, change vehicle height and keep for more than 3 seconds.

1.0 to 14.4 V

A40-18 (LHT) - Body ground

V - Body ground

Leveling motor LH operation signal input

With low beam headlights on, vehicle height not changed

Below 1 V

With low beam headlights on, change vehicle height and keep for more than 3 seconds.

1.0 to 14.4 V

A40-19 (SHRL) - Body ground

BE - Body ground

Rear height control sensor signal input

Ignition switch off

Below 1 V

Ignition switch ON

0.5 to 4.5 V

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

(1) Waveform 1


Item

Content

Tool setting

2 V/DIV., 2 ms./DIV.

3. CHECK AFS ECU (HEADLIGHT SWIVEL ECU ASSEMBLY) (w/ Automatic High Beam System)

(a) Disconnect the D44 AFS ECU (headlight swivel ECU assembly) connector.


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

Standard Resistance

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

D44-22 (E1) - Body ground

B - Body ground

AFS ECU (headlight swivel ECU assembly) ground

Always

Below 1 Ω

Standard Voltage

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

D44-15 (IG) - Body ground

G - Body ground

AFS ECU (headlight swivel ECU assembly) power supply

Ignition switch off

Below 1 V

Ignition switch ON

11 to 14 V

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

(c) Reconnect the D44 AFS ECU (headlight swivel ECU assembly) connector.

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

Standard Voltage

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

D44-7 (MPX2) - D44-22 (E1)

V - B

Operation check signal

Ignition switch ON, terminal LVL and GND of DLC3 connected

Below 1 V

Ignition switch ON, terminal LVL and GND of DLC3 not connected

Approx. 5 V

D44-10 (SMR) - D44-22 (E1)

R - B

LIN communication

Ignition switch off

Below 1 V

Ignition switch ON, inner rear view mirror connector disconnected

Pulse generation

(See waveform 1)

D44-12 (CANH) - D44-22 (E1)

Y - B

CAN communication

Ignition switch off

Below 1 V

Ignition switch ON

Pulse generation

D44-13 (CANL) - D44-22 (E1)

W - B

CAN communication

Ignition switch off

Below 1 V

Ignition switch ON

Pulse generation

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

(1) Waveform 1


Item

Content

Tool setting

2 V/DIV., 20 ms./DIV.

4. CHECK INNER REAR VIEW MIRROR ASSEMBLY

(a) Disconnect the P12 inner rear view mirror assembly connector.


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

Standard Resistance

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

P12-2 (E)*1 - Body ground

W-B - Body ground

Inner rear view mirror assembly ground

Always

Below 1 Ω

Standard Voltage

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

P12-1 (IG)*1 - Body ground

Y - Body ground

Inner rear view mirror assembly power supply

Ignition switch off

Below 1 V

Ignition switch ON

11 to 14 V

  • *1: Automatic Glare-resistant EC Mirror

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

(c) Reconnect the P12 inner rear view mirror assembly connector.

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

Standard Voltage

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

P12-3 (LIN)*2 - P12-2 (E)

R - W-B

LIN communication

Ignition switch off

Below 1 V

Automatic high beam system operates

Pulse generation

(See waveform 1)

  • *2: w/ Automatic High Beam System

If the result is not as specified, the inner rear view mirror assembly may have a malfunction.

(1) Waveform 1


Item

Content

Tool setting

2 V/DIV., 20 ms./DIV.

5. CHECK OUTER MIRROR CONTROL ECU ASSEMBLY LH (w/ Seat Position Memory)

(a) Disconnect the I13 outer mirror control ECU assembly LH connector.


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

HINT:

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

Standard Voltage

Tester Connection

Wiring Color

Terminal Description

Condition

Specified Condition

I13-14 (BDR) - Body ground

V - Body ground

Battery power supply

Ignition switch off

11 to 14 V

I13-6 (CPUB) - Body ground

LG - Body ground

Battery power supply

Ignition switch off

11 to 14 V

I13-5 (SIG) - Body ground

L - Body ground

Ignition power supply

Ignition switch ON

11 to 14 V

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

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

HINT:

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

Standard Resistance

Tester Connection

Wiring Color

Terminal Description

Condition

Specified Condition

I13-7 (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.

(d) Reconnect the I13 outer mirror control ECU assembly LH connector.

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

Standard Voltage

Tester Connection

Wiring Color

Terminal Description

Condition

Specified Condition

I12-2 (LP) - I12-12 (HTR-)

SB - V

Door mirror foot light (LH) drive output

Door mirror foot light off

Below 1 V

Door mirror foot light on

11 to 14 V

6. CHECK OUTER MIRROR CONTROL ECU ASSEMBLY RH (w/ Seat Position Memory)

(a) Disconnect the H13 outer mirror control ECU assembly RH connector.


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

HINT:

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

Standard Voltage

Tester Connection

Wiring Color

Terminal Description

Condition

Specified Condition

H13-14 (BDR) - Body ground

R - Body ground

Battery power supply

Ignition switch off

11 to 14 V

H13-6 (CPUB) - Body ground

B - Body ground

Battery power supply

Ignition switch off

11 to 14 V

H13-5 (SIG) - Body ground

L - Body ground

Ignition power supply

Ignition switch ON

11 to 14 V

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

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

HINT:

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

Standard Resistance

Tester Connection

Wiring Color

Terminal Description

Condition

Specified Condition

H13-7 (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.

(d) Reconnect the H13 outer mirror control ECU assembly RH connector.

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

Standard Voltage

Tester Connection

Wiring Color

Terminal Description

Condition

Specified Condition

H12-2 (LP) - H12-12 (HTR-)

SB - V

Door mirror foot light (RH) drive output

Door mirror foot light off

Below 1 V

Door mirror foot light on

11 to 14 V

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