Toyota 4Runner manuals

Toyota 4Runner: Terminals Of Ecu

TERMINALS OF ECU

1. CHECK DRIVER SIDE JUNCTION BLOCK ASSEMBLY AND MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)


(a) Remove the main body ECU (multiplex network body ECU) (See page ).


(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

A-30 (BECU) - Body ground

-

Auxiliary battery power supply

Always

11 to 14 V

A-31 (ALTB) - Body ground

-

Auxiliary battery power supply

Always

11 to 14 V

A-32 (IG) - Body ground

-

Ignition switch power supply

Ignition switch ON

11 to 14 V

A-32 (IG) - Body ground

-

Ignition switch power supply

Ignition switch off

Below 1 V

A-29 (ACC) - Body ground

-

ACC power supply

Ignition switch ACC

11 to 14 V

A-29 (ACC) - Body ground

-

ACC power supply

Ignition switch off

Below 1 V

A-11 (GND1) - Body ground

-

Ground

Always

Below 1 Ω

F10-3 (GND2) - Body ground

W-B - Body ground

Ground

Always

Below 1 Ω

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

(c) Install the main body ECU (multiplex network body ECU) (See page ).


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

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

2F-27 (FLCY) - Body ground

R - Body ground

Front door LH courtesy switch input

Front door LH open

Below 1 V

2F-27 (FLCY) - Body ground

R - Body ground

Front door LH courtesy switch input

Front door LH closed

11 to 14 V

2B-15 (FRCY) - Body ground

B - Body ground

Front door RH courtesy switch input

Front door RH open

Below 1 V

2B-15 (FRCY) - Body ground

B - Body ground

Front door RH courtesy switch input

Front door RH closed

11 to 14 V

F8-3 (LCTY) - Body ground

V - Body ground

Rear door LH courtesy light switch input

Rear door LH open

Below 1 V

F8-3 (LCTY) - Body ground

V - Body ground

Rear door LH courtesy light switch input

Rear door LH closed

11 to 14 V

F10-27 (RCTY) - Body ground

R - Body ground

Rear door RH courtesy light switch input

Rear door RH open

Below 1 V

F10-27 (RCTY) - Body ground

R - Body ground

Rear door RH courtesy light switch input

Rear door RH closed

11 to 14 V

F9-11 (L2) - Body ground

LG - Body ground

Driver side door key-linked lock input

Driver side door key cylinder lock position

Below 1 V

F9-11 (L2) - Body ground

LG - Body ground

Driver side door key-linked lock input

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

Pulse generation (see waveform 1 or 2)

F9-24 (UL3) - Body ground

GR - Body ground

Driver side door key-linked unlock input

Driver side door key cylinder unlock position

Below 1 V

F9-24 (UL3) - Body ground

GR - Body ground

Driver side door key-linked unlock input

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

Pulse generation (see waveform 3 or 4)

F9-7 (LSFL) - Body ground

G - Body ground

Front door LH lock position switch input

Front door LH unlocked

Below 1 V

F9-7 (LSFL) - Body ground

G - Body ground

Front door LH lock position switch input

Ignition switch off, all doors closed and front door LH locked

Pulse generation (see waveform 5 or 6)

F9-18 (LSFR) - Body ground

G - Body ground

Front door RH lock position switch input

Front door RH unlocked

Below 1 V

F9-18 (LSFR) - Body ground

G - Body ground

Front door RH lock position switch input

Ignition switch off, all doors closed and front door RH locked

Pulse generation (see waveform 7 or 8)

2F-25 (LSWL) - Body ground

V - Body ground

Rear door LH lock position switch input

Rear door LH unlocked

Below 1 V

2F-25 (LSWL) - Body ground

V - Body ground

Rear door LH lock position switch input

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

Pulse generation (see waveform 9 or 10)

F10-2 (LSWR) - Body ground

V - Body ground

Rear door RH lock position switch input

Rear door RH unlocked

Below 1 V

F10-2 (LSWR) - Body ground

V - Body ground

Rear door RH lock position switch input

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

Pulse generation (see waveform 11 or 12)

2B-34 (IND) - Body ground

L - Body ground

Security indicator light signal

Security indicator light illuminates (illuminates only for 30 (+/-5) seconds in alarm sounding state (blinks when system in armed state))

3 to 6 V

2D-23 (HCTY) - Body ground

B - Body ground

Security courtesy switch input

Engine hood open

Below 1 V

2D-23 (HCTY) - Body ground

B - Body ground

Security courtesy switch input

Engine hood closed

Pulse generation (see waveform 13 or 14)

2D-29 (HORN) - Body ground

GR-L - Body ground

Vehicle horn(s) signal

Vehicle horn(s) sounding (theft warning system in alarm sounding state)

Pulse generation

2D-29 (HORN) - Body ground

GR-L - Body ground

Vehicle horn(s) signal

Vehicle horn(s) not sounding (theft warning system in armed state)

11 to 14 V

2D-25 (SH) - Body ground

R - Body ground

Security horn signal

Security horn sounding (theft warning system in alarm sounding state)

Pulse generation

2D-25 (SH) - Body ground

R - Body ground

Security horn signal

Security horn not sounding (theft warning system in armed state)

11 to 14 V

If the result is not as specified, the main body ECU (multiplex network body ECU) or driver side junction block assembly may have a malfunction.

(e) Using an oscilloscope, check waveform 1.

Waveform 1 (Reference)

Item

Content

Terminal No. (Symbol)

F9-11 (L2) - Body ground

Tool Setting

5 V/DIV., 20 ms/DIV.

Condition

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

(f) Using an oscilloscope, check waveform 2.

Waveform 2 (Reference)

Item

Content

Terminal No. (Symbol)

F9-11 (L2) - Body ground

Tool Setting

5 V/DIV., 20 ms/DIV.

Condition

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

(g) Using an oscilloscope, check waveform 3.

Waveform 3 (Reference)

Item

Content

Terminal No. (Symbol)

F9-24 (UL3) - Body ground

Tool Setting

5 V/DIV., 20 ms/DIV.

Condition

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

(h) Using an oscilloscope, check waveform 4.

Waveform 4 (Reference)

Item

Content

Terminal No. (Symbol)

F9-24 (UL3) - Body ground

Tool Setting

5 V/DIV., 20 ms/DIV.

Condition

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

(i) Using an oscilloscope, check waveform 5.

Waveform 5 (Reference)

Item

Content

Terminal No. (Symbol)

F9-7 (LSFL) - Body ground

Tool Setting

5 V/DIV., 20 ms/DIV.

Condition

Ignition switch off, all doors closed and front door LH locked

(j) Using an oscilloscope, check waveform 6.

Waveform 6 (Reference)

Item

Content

Terminal No. (Symbol)

F9-7 (LSFL) - Body ground

Tool Setting

5 V/DIV., 20 ms/DIV.

Condition

Ignition switch off, all doors closed and front door LH locked

(k) Using an oscilloscope, check waveform 7.

Waveform 7 (Reference)

Item

Content

Terminal No. (Symbol)

F9-18 (LSFR) - Body ground

Tool Setting

5 V/DIV., 20 ms/DIV.

Condition

Ignition switch off, all doors closed and front door RH locked

(l) Using an oscilloscope, check waveform 8.

Waveform 8 (Reference)

Item

Content

Terminal No. (Symbol)

F9-18 (LSFR) - Body ground

Tool Setting

5 V/DIV., 20 ms/DIV.

Condition

Ignition switch off, all doors closed and front door RH locked

(m) Using an oscilloscope, check waveform 9.

Waveform 9 (Reference)

Item

Content

Terminal No. (Symbol)

2F-25 (LSWL) - Body ground

Tool Setting

5 V/DIV., 20 ms/DIV.

Condition

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

(n) Using an oscilloscope, check waveform 10.

Waveform 10 (Reference)

Item

Content

Terminal No. (Symbol)

2F-25 (LSWL) - Body ground

Tool Setting

5 V/DIV., 20 ms/DIV.

Condition

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

(o) Using an oscilloscope, check waveform 11.

Waveform 11 (Reference)

Item

Content

Terminal No. (Symbol)

F10-2 (LSWR) - Body ground

Tool Setting

5 V/DIV., 20 ms/DIV.

Condition

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

(p) Using an oscilloscope, check waveform 12.

Waveform 12 (Reference)

Item

Content

Terminal No. (Symbol)

F10-2 (LSWR) - Body ground

Tool Setting

5 V/DIV., 20 ms/DIV.

Condition

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

(q) Using an oscilloscope, check waveform 13.

Waveform 13 (Reference)

Item

Content

Terminal No. (Symbol)

2D-23 (HCTY) - Body ground

Tool Setting

5 V/DIV., 20 ms/DIV.

Condition

Ignition switch off, all doors closed and engine hood closed

(r) Using an oscilloscope, check waveform 14.

Waveform 14 (Reference)

Item

Content

Terminal No. (Symbol)

2D-23 (HCTY) - Body ground

Tool Setting

5 V/DIV., 20 ms/DIV.

Condition

Ignition switch off, all doors closed and engine hood closed

2. CHECK MULTIPLEX NETWORK DOOR ECU (BACK DOOR P/W)


(a) Disconnect the V2 multiplex network door ECU (back door P/W) 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

V2-1 (BDR) - Body ground

B - Body ground

Battery power supply

Always

11 to 14 V

V2-7 (BECU) - Body ground

L - Body ground

Battery power supply

Always

11 to 14 V

V2-8 (SIG) - Body ground

G - Body ground

Ignition switch power supply

Ignition switch ON

11 to 14 V

V2-8 (SIG) - Body ground

G - Body ground

Ignition switch power supply

Ignition switch off

Below 1 V

V2-6 (GND) - Body ground

W-B - Body ground

Ground

Always

Below 1 Ω

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

(c) Reconnect the V2 multiplex network door ECU (back door P/W) connector.

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

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

W10-10 (BDCY) - W10-18 (CTYE)

P - G

Back door courtesy switch input

Back door closed

Pulse generation (see waveform 1 or 2)

W10-10 (BDCY) - W10-18 (CTYE)

P - G

Back door courtesy switch input

Back door open

Below 1 V

W10-16 (BKL) - W10-8 (KEYE)*

P - V

Tail gate control switch lock input

Back door lock key cylinder neutral position

Pulse generation (see waveform 3 or 4)

W10-16 (BKL) - W10-8 (KEYE)*

P - V

Tail gate control switch lock input

Back door lock key cylinder is turned lock

Below 1 V

W10-15 (BKUL) - W10-8 (KEYE)*

R - V

Tail gate control switch unlock input

Back door lock key cylinder neutral position

Pulse generation (see waveform 3 or 4)

W10-15 (BKUL) - W10-8 (KEYE)*

R - V

Tail gate control switch unlock input

Back door lock key cylinder is turned unlock

Below 1 V

  • *: w/o Smart Key System

If the result is not as specified, the multiplex network door ECU (back door P/W) may have a malfunction.

(e) Using an oscilloscope, check waveform 1.

Waveform 1 (Reference)

Item

Content

Terminal No. (Symbol)

W10-10 (BDCY) - W10-18 (CTYE)

Tool Setting

5 V/DIV., 10 ms/DIV.

Condition

Back door closed

(f) Using an oscilloscope, check waveform 2.

Waveform 2 (Reference)

Item

Content

Terminal No. (Symbol)

W10-10 (BDCY) - W10-18 (CTYE)

Tool Setting

5 V/DIV., 10 ms/DIV.

Condition

Back door closed

(g) Using an oscilloscope, check waveform 3.

Waveform 3 (Reference)

Item

Content

Terminal No. (Symbol)

  • W10-16 (BKL) - W10-8 (KEYE)
  • W10-15 (BKUL) - W10-8 (KEYE)

Tool Setting

5 V/DIV., 10 ms/DIV.

Condition

Back door lock key cylinder neutral position

(h) Using an oscilloscope, check waveform 4.

Waveform 4 (Reference)

Item

Content

Terminal No. (Symbol)

  • W10-16 (BKL) - W10-8 (KEYE)
  • W10-15 (BKUL) - W10-8 (KEYE)

Tool Setting

5 V/DIV., 10 ms/DIV.

Condition

Back door lock key cylinder neutral position

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