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, 2C 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.

HINT:

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

Symbols (Terminal No.)

Wiring Color

Terminal Description

Condition

Specified Condition

2A-1 (IG) - Body ground

B - Body ground

Ignition power supply (IG signal)

Engine switch on (IG) → off

10 to 14 V → Below 1 V

2A-1 (ACC) - Body ground

B - Body ground

Ignition power supply (ACC signal)

Engine switch on (ACC) → off

10 to 14 V → Below 1 V

2C-30 (ALTB) - Body ground

BR - Body ground

+B (power system alternator system) power supply

Always

10 to 14 V

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

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

Symbols (Terminal No.)

Wiring Color

Terminal Description

Condition

Specified Condition

D50-24 (DCTY) - Body ground

V - Body ground

Driver side door courtesy light switch input

Driver side door CLOSED (OFF) → OPEN (ON)

Pulse generation → Below 1 V

D49-21 (PCTY) - Body ground

V - Body ground

Passenger side courtesy light switch input

Passenger side door CLOSED (OFF) → OPEN (ON)

Pulse generation → Below 1 V

D49-7 (RCTY) - Body ground

GR - Body ground

Rear courtesy light switch RH input

Rear door RH CLOSED (OFF) → OPEN (ON)

Pulse generation → Below 1 V

2O-19 (LCTY) - Body ground

R - Body ground

Rear courtesy light switch LH input

Rear door LH CLOSED (OFF) → OPEN (ON)

Pulse generation → Below 1 V

D49-25 (BCTY) - Body ground

GR - Body ground

Back door courtesy light switch input

Back door CLOSED (OFF) → OPEN (ON)

Pulse generation → Below 1 V

D48-4 (HAZ) - Body ground

G - Body ground

Turn signal flasher relay signal

Any transmitter switch is pressed → not pressed

Below 1 V → 10 to 14 V

2C-25 (HORN) - Body ground

R - Body ground

Vehicle horn siganal

Vehicle horn is sounding (Panic alarm system is in alarm sounding state)

Below 1 V → 12 V

D51-7 (BZR) - Body ground

LG - Body ground

Wireless door lock buzzer signal

Wireless door lock buzzer OFF → ON

Below 1 V → Pulse generation

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

2. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)


(a) Disconnect the D25 and D26 certification ECU (smart key ECU assembly) connectors.

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

Terminal No. (Symbols)

Wiring Color

Terminal Description

Condition

Specified Condition

D25-15 (E) - Body ground

B - Body ground

Ground

Always

Below 1 Ω

D25-1 (+B) - D25-15 (E)

G - B

Battery power supply

Always

11 to 14 V

D25-16 (IG) - D25-15 (E)

R - B

IG power supply

Engine switch on (IG)

11 to 14 V

Engine switch off

Below 1 V

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

(c) Reconnect the D25 and D26 certification ECU (smart key ECU assembly) connectors.

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

Terminal No. (Symbols)

Wiring Color

Terminal Description

Condition

Specified Condition

D26-16 (RSSI) - D25-15 (E)

P - B

Door control receiver output signal

Engine switch off, all doors closed and transmitter switch not pressed

11 to 14 V

Engine switch off, all doors closed and transmitter switch pressed

Below 2 V

D26-15 (RDA) - D25-15 (E)

R - B

Door control receiver input signal

Engine switch off, all doors closed and transmitter switch not pressed

11 to 14 V pulse generation at regular intervals

Engine switch off, all doors closed and transmitter switch pressed

Pulse generation

D26-5 (RCO) - D25-15 (E)

Y - B

Supply battery to door control receiver

Engine switch off, all doors closed and transmitter switch pressed

4.5 to 5.5 V

  • If the result is not as specified, the certification ECU (smart key ECU assembly) may have a malfunction.
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