Lexus NX: Terminals Of Ecu

TERMINALS OF ECU

CHECK COMBINATION METER ASSEMBLY

(a) Disconnect the I10 combination meter assembly connector.

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

Tester Connection

Wiring Color

Terminal Description

Condition

Specified Condition

I10-21 (IG+) - Body ground

B - Body ground

IG power supply

Power switch on (IG) → off

11 to 14 V → Below 1 V

I10-22 (B) - Body ground

Y - Body ground

Battery power supply

Always

11 to 14 V

I10-31 (ES) - Body ground

W-B - Body ground

Ground

Always

Below 1 Ω

(c) Reconnect the I10 combination meter assembly connector.

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

Tester Connection

Wiring Color

Terminal Description

Condition

Specified Condition

I10-6 (P/SB) - Body ground

L - Body ground

Front passenger seat belt buckle switch signal

Power switch on (IG), front passenger seat occupied, seat belt unfastened → fastened

11 to 14 V → Below 1 V

I10-12 (RRSB) - Body ground

W - Body ground

Rear RH seat belt buckle switch signal

Rear RH seat belt unfastened → fastened

11 to 14 V → Below 1 V

I10-13 (RCSB) - Body ground

B - Body ground

Rear center seat belt buckle switch signal

Rear center seat belt unfastened → fastened

11 to 14 V → Below 1 V

I10-14 (RLSB) - Body ground

G - Body ground

Rear LH seat belt buckle switch signal

Rear LH seat belt unfastened → fastened

11 to 14 V → Below 1 V

I10-35 (RLMT) - Body ground

W - Body ground

Rear LH seat belt warning light signal

Rear LH seat belt unfastened → fastened

11 to 14 V → Below 1 V

I10-36 (RCMT) - Body ground

G - Body ground

Rear center seat belt fastened

Rear center seat belt unfastened → fastened

11 to 14 V → Below 1 V

I10-37 (RRMT) - Body ground

L - Body ground

Rear RH seat belt warning light signal

Rear RH seat belt unfastened → fastened

11 to 14 V → Below 1 V

CHECK AIRBAG ECU ASSEMBLY

Terminal No.

Terminal Symbol

Destination

Q23-15

LBE+

Front seat inner belt assembly LH

Q23-23

LBE-

Front seat inner belt assembly LH

P23-9

FSR+

Occupant detection ECU

P23-17

FSR-

Occupant detection ECU

CHECK OCCUPANT DETECTION ECU

HINT:

Since the occupant detection ECU uses waterproof connectors, the voltage and waveform cannot be inspected directly. Standard voltage readings 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.

READ NEXT:

 Diagnosis System

DIAGNOSIS SYSTEM CHECK DLC3 (a) Check the DLC3. Click here INSPECT AUXILIARY BATTERY VOLTAGE (a) Measure the auxiliary battery voltage. Standard voltage: 11 to 14 V (power switch off) If the vo

 Data List / Active Test

DATA LIST / ACTIVE TEST DATA LIST NOTICE: In the following table, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether

 Driver Side Seat Belt Warning Light does not Operate

DESCRIPTION The combination meter assembly illuminates, blinks or turns off the front seat belt warning light on the combination meter assembly in accordance with the state of the front seat inner bel

SEE MORE:

 Data List / Active Test

DATA LIST / ACTIVE TEST DATA LIST NOTICE: In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a part is faulty or not. HINT: Using the Techstream to read the Data List allows the values or states of

 Internal Control Module Software Incompatibility Not Programmed (U030051,U030057)

DESCRIPTION When the forward recognition camera is unable to determine the vehicle information from the vehicle information sent from the hybrid vehicle control ECU, the forward recognition camera outputs U030051. When the vehicle information sent from the hybrid vehicle control ECU does not ma

© 2016-2024 Copyright www.lexunx.com