Lexus NX: Terminals Of Ecu

TERMINALS OF ECU

OCCUPANT DETECTION ECU

HINT:

Since the occupant detection ECU uses waterproof connectors, the voltage and waveform cannot be inspected directly. Standard voltage and waveforms are indicated for reference only.

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

f14-1 (SVC1) - f14-5 (SGD1)

R - G

Front occupant classification sensor LH power supply

Power switch on (IG)

4.9 to 5.1 V

f14-2 (SVC3) - f14-6 (SGD3)

GR - W

Rear occupant classification sensor LH power supply

Power switch on (IG)

4.9 to 5.1 V

f14-3 (SIG1) - f14-5 (SGD1)

P - G

Front occupant classification sensor LH signal

Power switch on (IG)

Pulse generation

f14-4 (SIG3) - f14-6 (SGD3)

SB - W

Rear occupant classification sensor LH signal

Power switch on (IG)

Pulse generation

f14-5 (SGD1) - f15-3 (GND)

G - W-B

Front occupant classification sensor LH ground

Always

Below 1 V

f14-6 (SGD3) - f15-3 (GND)

W - W-B

Rear occupant classification sensor LH ground

Always

Below 1 V

f15-1 (+B) - f15-3 (GND)

W - W-B

Power source (+B)

Power switch off

11 to 14 V

f15-2 (DIA)

GR

Diagnosis (DLC3)

-*

-*

f15-3 (GND) - Body ground

W-B - Body ground

Ground

Always

Below 1 V

f15-4 (FSR-) - f15-3 (GND)

LG - W-B

Airbag ECU assembly communication signal

Always

Below 1 V

f15-5 (BGND) - f15-3 (GND)

P - W-B

Front Passenger side buckle switch ground

Always

Below 1 V

f15-6 (IG2) - f15-3 (GND)

B - W-B

Power source (IG)

Power switch on (IG)

11 to 14 V

f15-7 (FSR+) - f15-4 (FSR-)

L - LG

Airbag ECU assembly communication signal

Power switch on (IG)

Pulse generation

f15-8 (BSW) - f15-5 (BGND)

G - P

Front Passenger side buckle switch signal

Always

Pulse generation

  • *: As this is a line that is connected to other systems, voltage changes according to the systems that are connected.

AIRBAG ECU ASSEMBLY

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