Toyota Venza: Terminals Of Ecu

Toyota Venza Service Manual / Door Lock / Wireless Door Lock Control System(w/o Smart Key System) / 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 (ACC) - Body ground	B - Body ground	Ignition power supply (ACC signal)	Ignition switch ACC → off	10 to 14 V → Below 1 V
2A-1 (IG) - Body ground	B - Body ground	Ignition power supply (IG signal)	Ignition switch ON → off	10 to 14 V → Below 1 V
2C-24 (BECU) - Body ground	L - Body ground	+B power supply	Always	10 to 14 V
2C-30 (ALTB) - Body ground	BR - Body ground	+B (power system alternator system) power supply	Always	10 to 14 V
D51-5 (KSW) - Body ground	L - Body ground	Unlock warning switch input	No key in ignition key cylinder (OFF) → Key inserted (ON)	10 kΩ or higher → Below 1 Ω
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.

(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 pressed → not pressed	Below 1 V → 10 to 14 V
2C-25 (HORN) - Body ground	R - Body ground	Vehicle horn signal	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.

Diagnosis System

DIAGNOSIS SYSTEM 1. DESCRIPTION The ECU stores trouble codes when malfunctions occur. The diagnostic system allows for reading of the trouble codes from the DLC3 using the Techstream. Use the Te ...

Data List / Active Test

DATA LIST / ACTIVE TEST 1. DATA LIST HINT: Using the Techstream to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any p ...

Other materials about Toyota Venza:

Setting up the displays
Press the “SETUP” button while the vehicle is stopped. The “Custom Settings” screen is displayed on the multi-information display. If left idle for approximately 10 seconds, the display will revert to the previous screen. Select “Display / ...

System Description
SYSTEM DESCRIPTION 1. GENERAL (a) This system uses ultrasonic sensors to detect any obstacles at the corners and the rear of the vehicle. The system then informs the driver of the distance between the sensors and an obstacle as well as their positions by ...

Fail-safe Chart
FAIL-SAFE CHART 1. Fail-safe This function minimizes the loss of operation when any abnormality occurs in a sensor or solenoid. Fail-safe Control List Malfunction Part Function Input Turbine Speed Sensor ...