Toyota Venza: Terminals Of Ecu

Toyota Venza Service Manual / Theft Deterrent / Keyless Entry / Theft Deterrent 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 main body ECU (driver side junction block assembly) connectors.

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

Tester Connection	Wiring Color	Terminal Description	Condition	Specified Condition
D49-7 (RCTY) - Body ground	GR - Body ground	Rear courtesy light switch RH input	Rear door RH closed (OFF) → open (ON)	10 kΩ or higher → Below 1 Ω
D49-21 (PCTY) - Body ground	V - Body ground	Passenger side courtesy light switch input	Passenger side door closed (OFF) → open (ON)	10 kΩ or higher → Below 1 Ω
D49-25 (BCTY) - Body ground	GR - Body ground	Back door courtesy light switch input	Back door closed (OFF) → open (ON)	10 kΩ or higher → Below 1 Ω
D50-16 (HCTY) - Body ground	BE - Body ground	Security courtesy switch	Engine hood closed (OFF) → open (ON)	10 kΩ or higher → Below 1 Ω
D50-24 (DCTY) - Body ground	V - Body ground	Driver side door courtesy light switch input	Driver side door closed (OFF) → open (ON)	10 kΩ or higher → Below 1 Ω
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
2A-1 (ACC) - Body ground	B - Body ground	Ignition power supply (ACC signal)	Ignition switch ACC → OFF	11 to 14 V → Below 1 V
2A-1 (IG) - Body ground	B - Body ground	Ignition power supply (IG signal)	Ignition switch ON → OFF	11 to 14 V → Below 1 V
2C-30 (ALTB) - Body ground	BR - Body ground	+B (power system alternator system) power supply	Always	11 to 14 V
2F-16 (GND1) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω
2C-24 (BECU) - Body ground	L - Body ground	+B power supply	Always	11 to 14 V
2O-19 (LCTY) - Body ground	R - Body ground	Rear courtesy light switch LH input	Rear door LH closed (OFF) → open (ON)	10 kΩ or higher → Below 1 Ω

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

HINT:

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

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

Tester Connection	Wiring Color	Terminal Description	Condition	Specified Condition
D48-4 (HAZ) - Body ground	G - Body ground	Turn signal flasher relay signal	System in alarm sounding state	Below 1 V
D51-4 (IND) - Body ground	SB - Body ground	Security indicator output	Security indicator on (It lights up only in arming preparation state or alarm sounding state. It flashes when immobiliser is operating.)	3 to 6 V
D51-6 (SH) - Body ground	BR - Body ground	Security horn drive	Security horn sounding (Theft deterrent system is in alarm sounding state)	Pulse generation (Below 1 V ← → 12 V)
2C-25 (HORN) - Body ground	R - Body ground	Vehicle horn drive	Vehicle horn sounding (Theft deterrent system is in alarm sounding state)	Pulse generation (Below 1 V ← → 12 V)

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 trouble occurs on the vehicle. The diagnostic system allows for reading of the trouble codes from the DLC3. Use the Techstream to ...

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:

System Description
SYSTEM DESCRIPTION 1. WIRELESS DOOR LOCK CONTROL SYSTEM The wireless door lock control system can be used to lock and unlock all doors from a distance. The system is controlled by a door control transmitter which sends radio waves to the door control rec ...

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 parts. This non-intrusive inspection can be very useful bec ...

Power back door switch (vehicles with power back door)
Push the switch to close. Pressing the switch again while the power back door is closing will cause it to open again. However, the reverse operation cannot be performed for the first second after pressing the switch to close the door. The back door ca ...