Home › Vehicle Interior › Door Lock › POWER DOOR LOCK CONTROL SYSTEM
Last Modified: 11-27-2007 1.6 U
Service Category: Vehicle Interior Section: Door Lock
Model Year: 2008 Model: LX570 Doc ID: RM000001JW7005X
Title: DOOR LOCK: POWER DOOR LOCK CONTROL SYSTEM: TERMINALS OF ECU (2008 LX570)

TERMINALS OF ECU

1. CHECK MASTER SWITCH ASSEMBLY



(a) Disconnect the I11 switch 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

I11-12 (GND) - Body ground

W-B - Body ground

Ground

Always

Below 1 Ω

I11-11 (B) - I11-12 (GND)

L - W-B

Battery power supply

Always

11 to 14 V

If the result is not as specified, there may be a malfunction on the wire harness side.

2. CHECK MAIN BODY ECU



(a) Disconnect the 2B, 2D, and E3 ECU connectors.

(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

2B-20 (BATB) - Body ground

L - Body ground

Battery power supply

Always

11 to 14 V

2A-1 (ALTB) - Body ground

B - Body ground

Power supply

Engine switch on (ACC)

11 to 14 V

2A-1 (ALTB) - Body ground

B - Body ground

Power supply

Engine switch off

11 to 14 V

2D-62 (GND) - Body ground

W-B - Body ground

Ground

Always

Below 1 Ω

E3-1 (GND3) - Body ground

BR - Body ground

Ground

Always

Below 1 Ω

If the result is not as specified, there may be a malfunction on the wire harness side.

(c) Reconnect the 2B, 2D and E3 ECU connectors.

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

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

E1-24 (DCTY) - Body ground

L - Body ground

Driver side door courtesy light switch input

Driver side door open

Below 1 V

Engine switch off and driver side door courtesy light switch off

Pulse generation (see waveform 1 or 2)

E2-21 (PCTY) - Body ground

Y - Body ground

Front passenger side door courtesy light switch input

Front passenger side door open

Below 1 V

Engine switch off and passenger side door courtesy light switch off

Pulse generation (see waveform 3 or 4)

2C-2 (LCTY) - Body ground

W - Body ground

Rear door LH courtesy light switch input

Rear door LH open

Below 1 V

Engine switch off and rear LH side door courtesy light switch off

Pulse generation (see waveform 5 or 6)

E2-7 (RCTY) - Body ground

G - Body ground

Rear door RH courtesy light switch input

Rear door RH open

Below 1 V

Engine switch off and rear RH side door courtesy light switch off

Pulse generation (see waveform 7 or 8)

E2-25 (BCTY) - Body ground

W - Body ground

Back door courtesy light switch input

Back door open

Below 1 V

Engine switch off and back door closed

Pulse generation (see waveform 9 or 10)

2D-3 (ACT+) - Body ground

L - Body ground

Driver side door lock motor lock drive output

Master switch (door control switch) or driver side door key neutral position

Below 1 V

Master switch (door control switch) or driver side door key cylinder lock

11 to 14 V

E1-5 (ACTD) - Body ground

B - Body ground

Driver side door lock motor unlock drive output

Master switch (door control switch) or driver side door key neutral position

Below 1 V

Master switch (door control switch) or driver side door key cylinder unlock

11 to 14 V

2D-3 (ACT+) - Body ground

L - Body ground

Front passenger side door lock motor lock drive output

Master switch (door control switch) or driver side door key neutral position

Below 1 V

Master switch (door control switch) or driver side door key cylinder lock

11 to 14 V

2D-2 (ACT-) - Body ground

B - Body ground

Front passenger side door lock motor unlock drive output

Master switch (door control switch) or driver side door key neutral position

Below 1 V

Master switch (door control switch) or driver side door key cylinder unlock

11 to 14 V

2C-24 (ACT+) - Body ground

L - Body ground

Rear door LH lock motor lock drive output

Master switch (door control switch) or driver side door key neutral position

Below 1 V

Master switch (door control switch) or driver side door key cylinder lock

11 to 14 V

2C-23 (ACT-) - Body ground

B - Body ground

Rear door LH lock motor unlock drive output

Master switch (door control switch) or driver side door key neutral position

Below 1 V

Master switch (door control switch) or driver side door key cylinder unlock

11 to 14 V

2D-3 (ACT+) - Body ground

L - Body ground

Rear door RH lock motor lock drive output

Master switch (door control switch) or driver side door key neutral position

Below 1 V

Master switch (door control switch) or driver side door key cylinder lock

11 to 14 V

2D-2 (ACT-) - Body ground

B - Body ground

Rear door RH lock motor unlock drive output

Master switch (door control switch) or driver side door key neutral position

Below 1 V

Master switch (door control switch) or driver side door key cylinder unlock

11 to 14 V

E1-10 (UL3) - Body ground

Y - Body ground

Driver side door lock key switch input

Driver side door key cylinder unlock

Below 1 V

Engine switch off, all doors closed and driver side door key neutral position

Pulse generation (see waveform 11 or 12)

2D-53 (L2) - Body ground

LG - Body ground

Driver side door lock key switch input

Driver side door key cylinder lock

Below 1 V

Engine switch off, all doors closed and driver side door key neutral position

Pulse generation (see waveform 13 or 14)

E1-9 (LSWD) - Body ground

BR - Body ground

Driver side door lock position switch input

Driver side door unlocked

Below 1 V

Engine switch off, all doors closed and driver side door locked

Pulse generation (see waveform 15 or 16)

E2-27 (LSWP) - Body ground

Y - Body ground

Passenger side door lock position switch input

Passenger side door unlocked

Below 1 V

Engine switch off, all doors closed and passenger side door locked

Pulse generation (see waveform 17 or 18)

2C-1 (LSWL) - Body ground

BR - Body ground

Rear door LH lock position switch input

Rear door LH unlocked

Below 1 V

Engine switch off, all doors closed and rear door LH locked

Pulse generation (see waveform 19 or 20)

E2-5 (LSWR) - Body ground

BR - Body ground

Rear door RH lock position switch input

Rear door RH unlocked

Below 1 V

Engine switch off, all doors closed and rear door RH locked

Pulse generation (see waveform 21 or 22)

E1-26 (BDSU) - Body ground

L - Body ground

Back door opener switch input

Back door lock opener switch off

Below 1 V

Engine switch off, all doors closed and back door lock opener switch on

Pulse generation (see waveform 23 or 24)

If the result is not as specified, the ECU may have a malfunction.

(e) Using an oscilloscope, check waveform 1.

Waveform 1 (Reference)

Item

Content

Terminal No. (Symbol)

E1-24 (DCTY) - Body ground

Tool Setting

5 V/DIV., 20 ms/DIV.

Condition

Engine switch off and driver side door courtesy light switch off

(f) Using an oscilloscope, check waveform 2.

Waveform 2 (Reference)

Item

Content

Terminal No. (Symbol)

E1-24 (DCTY) - Body ground

Tool Setting

5 V/DIV., 20 ms/DIV.

Condition

Engine switch off and driver side door courtesy light switch off

(g) Using an oscilloscope, check waveform 3.

Waveform 3 (Reference)

Item

Content

Terminal No. (Symbol)

E2-21 (PCTY) - Body ground

Tool Setting

5 V/DIV., 20 ms/DIV.

Condition

Engine switch off and passenger side door courtesy light switch off

(h) Using an oscilloscope, check waveform 4.

Waveform 4 (Reference)

Item

Content

Terminal No. (Symbol)

E2-21 (PCTY) - Body ground

Tool Setting

5 V/DIV., 20 ms/DIV.

Condition

Engine switch off and passenger side door courtesy light switch off

(i) Using an oscilloscope, check waveform 5.

Waveform 5 (Reference)

Item

Content

Terminal No. (Symbol)

2C-2 (LCTY) - Body ground

Tool Setting

5 V/DIV., 20 ms/DIV.

Condition

Engine switch off and rear LH side door courtesy light switch off

(j) Using an oscilloscope, check waveform 6.

Waveform 6 (Reference)

Item

Content

Terminal No. (Symbol)

2C-2 (LCTY) - Body ground

Tool Setting

5 V/DIV., 20 ms/DIV.

Condition

Engine switch off and rear LH side door courtesy light switch off

(k) Using an oscilloscope, check waveform 7.

Waveform 7 (Reference)

Item

Content

Terminal No. (Symbol)

E2-7 (RCTY) - Body ground

Tool Setting

5 V/DIV., 20 ms/DIV.

Condition

Engine switch off and rear RH side door courtesy light switch off

(l) Using an oscilloscope, check waveform 8.

Waveform 8 (Reference)

Item

Content

Terminal No. (Symbol)

E2-7 (RCTY) - Body ground

Tool Setting

5 V/DIV., 20 ms/DIV.

Condition

Engine switch off and rear RH side door courtesy light switch off

(m) Using an oscilloscope, check waveform 9.

Waveform 9 (Reference)

Item

Content

Terminal No. (Symbol)

E2-25 (BCTY) - Body ground

Tool Setting

5 V/DIV., 20 ms/DIV.

Condition

Engine switch off and back door closed

(n) Using an oscilloscope, check waveform 10.

Waveform 10 (Reference)

Item

Content

Terminal No. (Symbol)

E2-25 (BCTY) - Body ground

Tool Setting

5 V/DIV., 20 ms/DIV.

Condition

Engine switch off and back door closed

(o) Using an oscilloscope, check waveform 11.

Waveform 11 (Reference)

Item

Content

Terminal No. (Symbol)

E1-10 (UL3) - Body ground

Tool Setting

5 V/DIV., 20 ms/DIV.

Condition

Engine switch off, all doors closed and driver side door key neutral position

(p) Using an oscilloscope, check waveform 12.

Waveform 12 (Reference)

Item

Content

Terminal No. (Symbol)

E1-10 (UL3) - Body ground

Tool Setting

5 V/DIV., 20 ms/DIV.

Condition

Engine switch off, all doors closed and driver side door key neutral position

(q) Using an oscilloscope, check waveform 13.

Waveform 13 (Reference)

Item

Content

Terminal No. (Symbol)

2D-53 (L2) - Body ground

Tool Setting

5 V/DIV., 20 ms/DIV.

Condition

Engine switch off, all doors closed and driver side door key neutral position

(r) Using an oscilloscope, check waveform 14.

Waveform 14 (Reference)

Item

Content

Terminal No. (Symbol)

2D-53 (L2) - Body ground

Tool Setting

5 V/DIV., 20 ms/DIV.

Condition

Engine switch off, all doors closed and driver side door key neutral position

(s) Using an oscilloscope, check waveform 15.

Waveform 15 (Reference)

Item

Content

Terminal No. (Symbol)

E1-9 (LSWD) - Body ground

Tool Setting

5 V/DIV., 20 ms/DIV.

Condition

Engine switch off, all doors closed and driver side door locked

(t) Using an oscilloscope, check waveform 16.

Waveform 16 (Reference)

Item

Content

Terminal No. (Symbol)

E1-9 (LSWD) - Body ground

Tool Setting

5 V/DIV., 20 ms/DIV.

Condition

Engine switch off, all doors closed and driver side door locked

(u) Using an oscilloscope, check waveform 17.

Waveform 17 (Reference)

Item

Content

Terminal No. (Symbol)

E2-27 (LSWP) - Body ground

Tool Setting

5 V/DIV., 20 ms/DIV.

Condition

Engine switch off, all doors closed and passenger side door locked

(v) Using an oscilloscope, check waveform 18.

Waveform 18 (Reference)

Item

Content

Terminal No. (Symbol)

E2-27 (LSWP) - Body ground

Tool Setting

5 V/DIV., 20 ms/DIV.

Condition

Engine switch off, all doors closed and passenger side door locked

(w) Using an oscilloscope, check waveform 19.

Waveform 19 (Reference)

Item

Content

Terminal No. (Symbol)

2C-1 (LSWL) - Body ground

Tool Setting

5 V/DIV., 20 ms/DIV.

Condition

Engine switch off, all doors closed and rear door LH locked

(x) Using an oscilloscope, check waveform 20.

Waveform 20 (Reference)

Item

Content

Terminal No. (Symbol)

2C-1 (LSWL) - Body ground

Tool Setting

5 V/DIV., 20 ms/DIV.

Condition

Engine switch off, all doors closed and rear door LH locked

(y) Using an oscilloscope, check waveform 21.

Waveform 21 (Reference)

Item

Content

Terminal No. (Symbol)

E2-5 (LSWR) - Body ground

Tool Setting

5 V/DIV., 20 ms/DIV.

Condition

Engine switch off, all doors closed and rear door RH locked

(z) Using an oscilloscope, check waveform 22.

Waveform 22 (Reference)

Item

Content

Terminal No. (Symbol)

E2-5 (LSWR) - Body ground

Tool Setting

5 V/DIV., 20 ms/DIV.

Condition

Engine switch off, all doors closed and rear door RH locked

(aa) Using an oscilloscope, check waveform 23.

Waveform 23 (Reference)

Item

Content

Terminal No. (Symbol)

E1-26 (BDSU) - Body ground

Tool Setting

5 V/DIV., 20 ms/DIV.

Condition

Engine switch off, all doors closed and back door lock opener switch on

(ab) Using an oscilloscope, check waveform 24.

Waveform 24 (Reference)

Item

Content

Terminal No. (Symbol)

E1-26 (BDSU) - Body ground

Tool Setting

5 V/DIV., 20 ms/DIV.

Condition

Engine switch off, all doors closed and back door lock opener switch on