Lexus NX manuals

Lexus NX: Terminals Of Ecu

Lexus NX Service Manual / Vehicle Exterior / Mirror (ext) / Power Mirror Control System (w/ Memory) / Terminals Of Ecu

TERMINALS OF ECU

CHECK OUTER MIRROR CONTROL ECU ASSEMBLY LH

(a) Disconnect the M5 ECU connector.

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

Tester Connection

Wiring Color

Terminal Description

Condition

Specified Condition

M5-5 (SIG) - M5-7 (GND)

GR - W-B

Power source

Power switch on (IG)

11 to 14 V

Power switch off

Below 1 V

M5-6 (CPUB) - M5-7 (GND)

GR - W-B

Power source

Power switch off

11 to 14 V

M5-14 (BDR) - M5-7 (GND)

Y - W-B

Power source

Power switch off

11 to 14 V

M5-7 (GND) - Body ground

W-B - Body ground

Ground

Always

Below 1 Ω

(c) Reconnect the M5 ECU connector.

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

Tester Connection

Wiring Color

Terminal Description

Condition

Specified Condition

B-3 (MR) - Body ground

SB - Body ground

Power retract mirror motor drive voltage
  • Power switch on (ACC)
  • Outer rear view mirror assembly being retracted

11 to 14 V
  • Power switch on (ACC)
  • Outer rear view mirror assembly stopped

Below 1 V

B-11 (MF) - Body ground

LG - Body ground

Power retract mirror motor drive voltage
  • Power switch on (ACC)
  • Outer rear view mirror assembly returning

11 to 14 V
  • Power switch on (ACC)
  • Outer rear view mirror assembly stopped

Below 1 V

B-1 (MV) - Body ground

V - Body ground

Mirror motor drive voltage
  • Power switch on (ACC)
  • Mirror surface stopped

Below 1 V
  • Power switch on (ACC)
  • Mirror surface moving downward or left

Below 1 V
  • Power switch on (ACC)
  • Mirror surface moving upward

11 to 14 V

B-9 (MH) - Body ground

BR - Body ground

Mirror motor drive voltage
  • Power switch on (ACC)
  • Mirror surface stopped

Below 1 V
  • Power switch on (ACC)
  • Mirror surface moving upward or right

Below 1 V
  • Power switch on (ACC)
  • Mirror surface moving left

11 to 14 V

B-10 (M+) - Body ground

R - Body ground

Mirror motor drive voltage
  • Power switch on (ACC)
  • Mirror surface stopped

Below 1 V
  • Power switch on (ACC)
  • Mirror surface moving upward or left

Below 1 V
  • Power switch on (ACC)
  • Mirror surface moving downward or right

11 to 14 V

B-4 (HTR+) - B-12 (TRN-)

B-G - W

Mirror heater drive voltage
  • Power switch on (IG)
  • Rear window defogger switch (mirror heater switch) on

11 to 14 V
  • Power switch on (IG)
  • Rear window defogger switch (mirror heater switch) off

Below 1 V

B-5 (VDD) - B-14 (GND)

O - GR

Mirror position sensor power supply

Power switch on (IG)

4.5 to 5.5 V

Power switch off

Below 1 V

B-6 (VSSR) - Body ground

W-B - Body ground

Vertical direction position sensor signal
  • Power switch on (ACC)
  • Mirror surface moving upward or downward

Changes within range of 0 to 5 V

B-13 (HSSR) - Body ground

Y-B - Body ground

Horizontal direction position sensor signal
  • Power switch on (ACC)
  • Mirror surface moving left or right

Changes within range of 0 to 5 V

M5-2 (M1) - M5-7 (GND)

G - W-B

Seat memory switch M1 signal
  • Power switch on (IG)
  • Seat memory switch M1 off

11 to 14 V
  • Power switch on (IG)
  • Seat memory switch M1 on

Below 1 V

M5-3 (M2) - M5-7 (GND)

P - W-B

Seat memory switch M2 signal
  • Power switch on (IG)
  • Seat memory switch M2 off

11 to 14 V
  • Power switch on (IG)
  • Seat memory switch M2 on

Below 1 V

M5-4 (M3) - M5-7 (GND)

B - W-B

Seat memory switch M3 signal
  • Power switch on (IG)
  • Seat memory switch M3 off

11 to 14 V
  • Power switch on (IG)
  • Seat memory switch M3 on

Below 1 V

M5-1 (MM) - M5-7 (GND)

L - W-B

Seat memory switch SET signal
  • Power switch on (IG)
  • Seat memory switch SET off

11 to 14 V
  • Power switch on (IG)
  • Seat memory switch SET on

Below 1 V

CHECK OUTER MIRROR CONTROL ECU ASSEMBLY RH

(a) Disconnect the L5 ECU connector.

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

Tester Connection

Wiring Color

Terminal Description

Condition

Specified Condition

L5-5 (SIG) - L5-7 (GND)

P - W-B

Power source

Power switch on (IG)

11 to 14 V

Power switch off

Below 1 V

L5-6 (CPUB) - L5-7 (GND)

B - W-B

Power source

Power switch off

11 to 14 V

L5-14 (BDR) - L5-7 (GND)

LG - W-B

Power source

Power switch off

11 to 14 V

L5-7 (GND) - Body ground

W-B - Body ground

Ground

Always

Below 1 Ω

(c) Reconnect the L5 ECU connector.

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

Tester Connection

Wiring Color

Terminal Description

Condition

Specified Condition

A-3 (MR) - Body ground

SB - Body ground

Power retract mirror motor drive voltage
  • Power switch on (ACC)
  • Outer rear view mirror assembly being retracted

11 to 14 V
  • Power switch on (ACC)
  • Outer rear view mirror assembly stopped

Below 1 V

A-11 (MF) - Body ground

LG - Body ground

Power retract mirror motor drive voltage
  • Power switch on (ACC)
  • Outer rear view mirror assembly returning

11 to 14 V
  • Power switch on (ACC)
  • Outer rear view mirror assembly stopped

Below 1 V

A-1 (MV) - Body ground

V - Body ground

Mirror motor drive voltage
  • Power switch on (ACC)
  • Mirror surface stopped

Below 1 V
  • Power switch on (ACC)
  • Mirror surface moving downward or left

Below 1 V
  • Power switch on (ACC)
  • Mirror surface moving upward

11 to 14 V

A-9 (MH) - Body ground

BR - Body ground

Mirror motor drive voltage
  • Power switch on (ACC)
  • Mirror surface stopped

Below 1 V
  • Power switch on (ACC)
  • Mirror surface moving upward or right

Below 1 V
  • Power switch on (ACC)
  • Mirror surface moving left

11 to 14 V

A-10 (M+) - Body ground

R - Body ground

Mirror motor drive voltage
  • Power switch on (ACC)
  • Mirror surface stopped

Below 1 V
  • Power switch on (ACC)
  • Mirror surface moving upward or left

Below 1 V
  • Power switch on (ACC)
  • Mirror surface moving downward or right

11 to 14 V

A-4 (HTR+) - A-12 (TRN-)

B-G - W

Mirror heater drive voltage
  • Power switch on (IG)
  • Rear window defogger switch (mirror heater switch) on

11 to 14 V
  • Power switch on (IG)
  • Rear window defogger switch (mirror heater switch) off

Below 1 V

A-5 (VDD) - A-14 (GND)

O - GR

Mirror position sensor power supply

Power switch on (IG)

4.5 to 5.5 V

Power switch off

Below 1 V

A-6 (VSSR) - Body ground

W-B - Body ground

Vertical direction position sensor signal
  • Power switch on (ACC)
  • Mirror surface moving upward or downward

Changes within range of 0 to 5 V

A-13 (HSSR) - Body ground

Y-B - Body ground

Horizontal direction position sensor signal
  • Power switch on (ACC)
  • Mirror surface moving left or right

Changes within range of 0 to 5 V

CHECK MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

*1

Main Body ECU (Multiplex Network Body ECU)

-

-

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

Tester Connection

Wiring Color

Terminal Description

Condition

Specified Condition

I49-4 (MIRB) - I49-6 (MIRE)

V - GR

Mirror surface adjust switch signal
  • Power switch on (ACC)
  • Mirror surface adjust switch up

Below 1.7 V
  • Power switch on (ACC)
  • Mirror surface adjust switch right

Below 2.7 V
  • Power switch on (ACC)
  • Mirror surface adjust switch down

Below 3.5 V
  • Power switch on (ACC)
  • Mirror surface adjust switch left

Below 4 V
  • Power switch on (ACC)
  • Mirror surface adjust switch off

3.8 to 5 V

I49-5 (MIRS) - I49-6 (MIRE)

B - GR

Mirror select switch signal
  • Power switch on (ACC)
  • Mirror select switch L

Below 2 V
  • Power switch on (ACC)
  • Mirror select switch R

Below 1 V
  • Power switch on (ACC)
  • Mirror select switch off

3.8 to 5 V

I47-14 (RET) - 4D-9 (GND1)

G - W-B

Mirror retract switch signal
  • Power switch on (ACC)
  • Mirror retract switch not in return position

Pulse generation (See waveform 1 or 2)
  • Power switch on (ACC)
  • Mirror retract switch in return position

Below 1 V

I47-15 (RTR) - 4D-9 (GND1)

LG - W-B

Mirror retract switch signal
  • Power switch on (ACC)
  • Mirror retract switch not in retract position

Pulse generation (See waveform 1 or 2)
  • Power switch on (ACC)
  • Mirror retract switch in retract position

Below 1 V

(b) Using an oscilloscope, check waveform 1.

Waveform 1 (Reference)

Item

Content

Terminal No. (Symbol)

I47-14 (RET) or I47-15 (RTR) - 4D-9 (GND1)

Tool Setting

5 V/DIV., 20 ms/DIV.

Condition
  • Power switch on (ACC)
  • Mirror retract switch not in retract position

(c) Using an oscilloscope, check waveform 2.

Waveform 2 (Reference)

Item

Content

Terminal No. (Symbol)

I47-14 (RET) or I47-15 (RTR) - 4D-9 (GND1)

Tool Setting

5 V/DIV., 20 ms/DIV.

Condition
  • Power switch on (ACC)
  • Mirror retract switch not in retract position

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