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.

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