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

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

F9-15 (SPD) - 2B-4 (GND1)

R - W-B

Speed signal

Vehicle speed at lower than 8 km/h (5 mph)

11 to 14 V

Vehicle speed at 8 km/h (5 mph) or more

Below 1 V

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

2. CHECK SIDE AUTO STEP CONTROLLER ECU ASSEMBLY


(a) Disconnect the A41 side auto step controller ECU assembly 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

A41-1 (GND) - Body Ground

W-B - Body Ground

Ground

Always

Below 1 Ω

A41-4 (B) - A41-1 (GND)

L - W-B

Battery power supply

Always

11 to 14 V

HINT:

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

(c) Reconnect the A41 side auto step controller ECU assembly 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

A41-5 (SSR-) - A41-1 (GND)

GR - W-B

Ground

Always

Below 1 Ω

A41-9 (SSR2) - A41-1 (GND)

L - W-B

Side auto step motor hall sensor RH signal

When the automatic running board RH is being deployed or stowed

Pulse generation (See waveform 1)

A41-10 (SSR1) - A41-1 (GND)

W - W-B

Side auto step motor hall sensor LH signal

When the automatic running board LH is being deployed or stowed

Pulse generation (See waveform 1)

A41-14 (SSR+) - A41-1 (GND)

LG - W-B

Side auto step hall sensor power supply

When the automatic running board is being deployed or stowed

8 to 11 V

A42-1 (DPL2) - A41-1 (GND)

G - W-B

Side auto step motor RH operation signal

Passenger side door is opened

When the automatic running board RH is being deployed

11 to 14 V

A42-2 (STW2) - A41-1 (GND)

R - W-B

Side auto step motor RH operation signal

Passenger side door is closed

When the automatic running board RH is being stowed

11 to 14 V

A42-3 (STW1) - A41-1 (GND)

P - W-B

Side auto step motor LH operation signal

Driver side door is closed

When the automatic running board LH is being stowed

11 to 14 V

A42-4 (DPL1) - A41-1 (GND)

V - W-B

Side auto step motor LH operation signal

Driver side door is opened

When the automatic running board LH is being deployed

11 to 14 V

A42-9 (FOUT) - A41-1 (GND)

GR - W-B

Ground

Always

Below 1 V

A42-10 (FIN) - A41-1 (GND)

W - W-B

Ground

Always

Below 1 V

A42-11 (SP1+) - A41-1 (GND)

R - W-B

Speed signal

Vehicle speed at lower than 8 km/h (5 mph)

11 to 14 V

Vehicle speed at 8 km/h (5 mph) or more

Below 1 V

A42-12 (IND) - A41-1 (GND)

G - W-B

Warning light drive output

Warning light on

11 to 14 V

Warning light off

Below 1 V

A42-13 (CTY2) - A41-1 (GND)

R - W-B

Door courtesy light switch RH signal

Rear door RH open

Below 1 V

Rear door RH closed

11 to 14 V

A42-14 (CTY1) - A41-1 (GND)

L - W-B

Door courtesy light switch LH signal

Rear door LH open

Below 1 V

Rear door LH closed

11 to 14 V

(e) Using an oscilloscope, check the waveform 1.

Waveform 1 (Reference)

Item

Content

Tool Setting

5 V/DIV., 5 ms/DIV.

Condition

When the automatic running board is being deployed or stowed

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