Lexus NX: Terminals Of Ecu

TERMINALS OF ECU

CHECK VEHICLE APPROACHING SPEAKER CONTROLLER

(a) Disconnect the A80 vehicle approaching speaker controller connector.

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

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

A80-1 (IG) - Body ground

L - Body ground

IG power supply

Power switch on (IG)

11 to 14 V

Power switch off

Below 1 V

A80-6 (GND) - Body ground

W-B - Body ground

Ground

Always

Below 1 Ω

(c) Connect the A80 vehicle approaching speaker controller connector.

(d) Measure the check for pulses according to the value(s) in the table below.

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

A80-7 (SP+) - A80-8 (SP-)

L - B

Vehicle approaching speaker output

Vehicle approaching speaker operating

A waveform synchronized with the sound is output.

(See Waveform 1)

A80-3 (CANH) - A80-6 (GND)

V - W-B

CAN communication line

Power switch on (IG)

Pulse generation

A80-4 (CANL) - A80-6 (GND)

W - W-B

CAN communication line

Power switch on (IG)

Pulse generation

(1) Waveform 1

Item

Condition

Tester Connection

A80-7 (SP+) - A80-8 (SP-)

Tool Setting

1 V/DIV., 500 ms./DIV.

Condition

Vehicle approaching speaker operating

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