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.

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