Toyota Venza: Terminals Of Ecu

Toyota Venza Service Manual / Tire Pressure Monitoring / Tire Pressure Warning System / Terminals Of Ecu

TERMINALS OF ECU

1. CHECK TIRE PRESSURE WARNING ECU

HINT:

Inspect the connectors from the back side while the connectors are connected.

(a) Disconnect the L14 tire pressure warning antenna and receiver connector.

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

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
D31-12 (RDA) - D31-9 (GND)	Y - W-B	Tire pressure warning antenna and receiver signal	Ignition switch ON	11 to 14 V

(d) Measure the voltage and resistance according to the value(s) in the table below. If the result is not as specified, the ECU may have a malfunction.

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
D31-2 (SPD) - D31-9 (GND)	P - W-B	Vehicle speed signal	Vehicle driving	Pulse generation (see waveform 1)
D31-3 (TC) - D31-9 (GND)	BR - W-B	TC terminal	Terminal TC not connected	11 to 14 V
D31-4 (TACH) - D31-9 (GND)	V - W-B	Engine speed signal	Engine running	Pulse generation (see waveform 2)
D31-5 (IND) - D31-9 (GND)	LG - W-B	Tire pressure warning light output signal	Ignition switch ON Tire pressure warning light OFF	Below 0.5 V
D31-5 (IND) - D31-9 (GND)	LG - W-B	Tire pressure warning light output signal	After ignition switch is turned to ON, tire pressure warning light illuminates for 3 seconds.	0.9 to 3.2 V
D31-6 (RF5V) - D31-9 (GND)	R - W-B	Tire pressure warning antenna and receiver power source	Ignition switch ON	11 to 14 V
D31-7 (IG) - D31-9 (GND)	GR - W-B	IG power source	Ignition switch ON	11 to 14 V
D31-9 (GND) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω
D31-10 (SIL) - D31-9 (GND)	P - W-B	Diagnostic communication	Ignition switch ON	8 to 14 V
D31-11 (GND2) - D31-9 (GND)	W - W-B	Tire pressure warning antenna and receiver ground	Always	Below 1 Ω
D31-12 (RDA) - D31-9 (GND)	Y - W-B	Tire pressure warning antenna and receiver signal	Ignition switch ON	11 to 14 V

(e) Using an oscilloscope, check waveform 1.

Waveform 1

Item	Content
Terminal	D31-2 (SPD) - D31-9 (GND)
Tool setting	5 V/DIV, 20 ms./DIV.
Vehicle condition	Driving at approximately 20 km/h (12 mph)

HINT:

The wavelength becomes shorter as the vehicle speed increases.

(f) Using an oscilloscope, check waveform 2.

Waveform 2

Item	Content
Terminal	D31-4 (TACH) - D31-9 (GND)
Tool setting	5 V/DIV., 10 ms./DIV.
Vehicle condition	Idling

HINT:

The wavelength becomes shorter as the engine speed increases.

Diagnosis System

DIAGNOSIS SYSTEM 1. CHECK BATTERY VOLTAGE Standard voltage: 11 to 14 V If the voltage is below 11 V, recharge the battery before proceeding to the next step. 2. CHECK DLC3 (a) The ECU uses IS ...

Dtc Check / Clear

DTC CHECK / CLEAR 1. DTC CHECK (USING SST CHECK WIRE) (a) Turn the ignition switch off. (b) Using SST, connect terminals 13 (TC) and 4 (CG) of the DLC3. SST: 09843-18040 (c) Turn the ignition s ...

Other materials about Toyota Venza:

Air Outlet Damper Control Servo Motor Circuit (B1443/43)
DESCRIPTION The air outlet control servo motor sends pulse signals to indicate the damper position to the A/C amplifier. The A/C amplifier activates the motor (normal or reverse) based on these signals to move the mode damper to any position, which contro ...

Turn Signal Flasher Assembly
Components COMPONENTS ILLUSTRATION Inspection INSPECTION PROCEDURE 1. INSPECT TURN SIGNAL FLASHER ASSEMBLY (a) Disconnect the D34 turn signal flasher assembly connector. (b) Measure the vo ...

Transmission Fluid Temperature Sensor "A" Performance (P0711)
DESCRIPTION The Automatic Transmission Fluid (ATF) temperature sensor converts the fluid temperature into a resistance value for use by the TCM. The TCM applies a voltage to the temperature sensor through terminal THO1 of the TCM. The sensor resistance ...