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

-

Battery power supply

Always

11 to 14 V

A-31 (ALTB) - Body ground

-

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).

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

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

F10-8 (RWSW) - Body ground

P - Body ground

Rear washer switch input

Ignition switch ON, rear washer switch on

Below 1 V

F10-8 (RWSW) - Body ground

P - Body ground

Rear washer switch input

Ignition switch ON, rear washer switch off

Pulse generation (See waveform 1 or 2)

F10-17 (RWLS) - Body ground

R- Body ground

Rear wiper switch input

Ignition switch ON, rear wiper switch INT

Below 1 V

F10-17 (RWLS) - Body ground

R - Body ground

Rear wiper switch input

Ignition switch ON, rear wiper switch off

Pulse generation (See waveform 1 or 2)

F9-1 (RWC1) - Body ground

B - Body ground

Rear wiper switch input

Ignition switch ON, rear wiper switch LO

Below 1 V

F9-1 (RWC1) - Body ground

B- Body ground

Rear wiper switch input

Ignition switch ON, rear wiper switch off

Pulse generation (See waveform 1 or 2)

F8-2 (BW) - Body ground

B - Body ground

Rear washer relay operation output

Ignition switch ON, rear wiper switch on

Below 1 V

F8-2 (BW) - Body ground

B - Body ground

Rear washer relay operation output

Ignition switch ON, rear wiper switch off

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)

  • F10-8 (RWSW) - Body ground
  • F10-17 (RWLS) - Body ground
  • F9-1 (RWC1) - Body ground

Tool Setting

5 V/DIV., 20 ms/DIV.

Condition

Ignition switch ON, rear washer switch off

(f) Using an oscilloscope, check waveform 2.

Waveform 2 (Reference)

Item

Content

Terminal No. (Symbol)

  • F10-8 (RWSW) - Body ground
  • F10-17 (RWLS) - Body ground
  • F9-1 (RWC1) - Body ground

Tool Setting

5 V/DIV., 20 ms/DIV.

Condition

Ignition switch ON, rear washer switch off

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.

HINT:

Measure the values on the wire harness side with the connector disconnected.

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 according to the value(s) in the table below.

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

V2-3 (W) - V2-12 (SGND)

R - G

Rear wiper reverse position switch input

Ignition switch ON and rear wiper switch on (rear wiper reverse position switch off)

Pulse generation (See waveform 1)

V2-3 (W) - V2-12 (SGND)

R - G

Rear wiper reverse position switch input

Ignition switch ON and rear wiper switch on (rear wiper reverse position switch on)

Pulse generation (See waveform 2)

V2-4 (P) - V2-12 (SGND)

V - G

Rear wiper retractable position switch input

Ignition switch ON and rear wiper switch on (rear wiper retractable position switch off)

Pulse generation (See waveform 3)

V2-4 (P) - V2-12 (SGND)

V - G

Rear wiper retractable position switch input

Ignition switch ON and rear wiper switch on (rear wiper retractable position switch on)

Pulse generation (See waveform 4)

V2-2 (WIP+) - V2-6 (GND)

L - W-B

Rear wiper motor output

Ignition switch ON, rear wiper switch INT

Pulse generation (See waveform 5)

V2-5 (WIP-) - V2-6 (GND)

P - W-B

Rear wiper motor output

Ignition switch ON, rear wiper switch INT

Pulse generation (See waveform 6)

V2-2 (WIP+) - V2-6 (GND)

L - W-B

Rear wiper motor output

Ignition switch ON, rear wiper switch LO

Pulse generation (See waveform 7)

V2-5 (WIP-) - V2-6 (GND)

P - W-B

Rear wiper motor output

Ignition switch ON, rear wiper switch LO

Pulse generation (See waveform 8)

V2-2 (WIP+) - V2-6 (GND)

L - W-B

Rear wiper motor output

Ignition switch ON, rear washer switch on

Pulse generation (See waveform 9)

V2-5 (WIP-) - V2-6 (GND)

P - W-B

Rear wiper motor output

Ignition switch ON, rear washer switch on

Pulse generation (See waveform 10)

V2-2 (WIP+) - V2-6 (GND)

L - W-B

Rear wiper motor output

Ignition switch ON, rear wiper switch off

Pulse generation (See waveform 11)

V2-5 (WIP-) - V2-6 (GND)

P - W-B

Rear wiper motor output

Ignition switch ON, rear wiper switch off

Pulse generation (See waveform 12)

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)

V2-3 (W) - V2-12 (SGND)

Tool Setting

5 V/DIV., 10 ms/DIV

Condition

Ignition switch ON and rear wiper switch on (rear wiper reverse position switch off)

(f) Using an oscilloscope, check waveform 2.

Waveform 2 (Reference)

Item

Content

Terminal No. (Symbol)

V2-3 (W) - V2-12 (SGND)

Tool Setting

5 V/DIV., 10 ms/DIV

Condition

Ignition switch ON and rear wiper switch on (rear wiper reverse position switch on)

(g) Using an oscilloscope, check waveform 3.

Waveform 3 (Reference)

Item

Content

Terminal No. (Symbol)

V2-4 (P) - V2-12 (SGND)

Tool Setting

2 V/DIV., 2 ms/DIV

Condition

Ignition switch ON and rear wiper switch on (rear wiper retractable position switch off)

(h) Using an oscilloscope, check waveform 4.

Waveform 4 (Reference)

Item

Content

Terminal No. (Symbol)

V2-4 (P) - V2-12 (SGND)

Tool Setting

2 V/DIV., 2 ms/DIV

Condition

Ignition switch ON and rear wiper switch on (rear wiper retractable position switch on)

(i) Using an oscilloscope, check waveform 5.

Waveform 5 (Reference)

Item

Content

Terminal No. (Symbol)

V2-2 (WIP+) - V2-6 (GND)

Tool Setting

2 V/DIV., 2 ms/DIV

Condition

Ignition switch ON, rear wiper switch INT

(j) Using an oscilloscope, check waveform 6.

Waveform 6 (Reference)

Item

Content

Terminal No. (Symbol)

V2-5 (WIP-) - V2-6 (GND)

Tool Setting

2 V/DIV., 2 ms/DIV

Condition

Ignition switch ON, rear wiper switch INT

(k) Using an oscilloscope, check waveform 7.

Waveform 7 (Reference)

Item

Content

Terminal No. (Symbol)

V2-2 (WIP+) - V2-6 (GND)

Tool Setting

2 V/DIV., 2 ms/DIV

Condition

Ignition switch ON, rear wiper switch LO

(l) Using an oscilloscope, check waveform 8.

Waveform 8 (Reference)

Item

Content

Terminal No. (Symbol)

V2-5 (WIP-) - V2-6 (GND)

Tool Setting

2 V/DIV., 2 ms/DIV

Condition

Ignition switch ON, rear wiper switch LO

(m) Using an oscilloscope, check waveform 9.

Waveform 9 (Reference)

Item

Content

Terminal No. (Symbol)

V2-2 (WIP+) - V2-6 (GND)

Tool Setting

2 V/DIV., 2 ms/DIV

Condition

Ignition switch ON, rear washer switch on

(n) Using an oscilloscope, check waveform 10.

Waveform 10 (Reference)

Item

Content

Terminal No. (Symbol)

V2-5 (WIP-) - V2-6 (GND)

Tool Setting

2 V/DIV., 2 ms/DIV

Condition

Ignition switch ON, rear washer switch on

(o) Using an oscilloscope, check waveform 11.

Waveform 11 (Reference)

Item

Content

Terminal No. (Symbol)

V2-2 (WIP+) - V2-6 (GND)

Tool Setting

2 V/DIV., 2 ms/DIV

Condition

Ignition switch ON, rear wiper switch off

(p) Using an oscilloscope, check waveform 12.

Waveform 12 (Reference)

Item

Content

Terminal No. (Symbol)

V2-5 (WIP-) - V2-6 (GND)

Tool Setting

2 V/DIV., 2 ms/DIV

Condition

Ignition switch ON, rear wiper switch off

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