Toyota 4Runner manuals

Toyota 4Runner: Terminals Of Ecu

TERMINALS OF ECU

1. CHECK POWER MANAGEMENT CONTROL ECU


(a) Disconnect the F80 power management control ECU 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

F80-1 (AM22) - Body ground

B - Body ground

+B power supply

Always

9.5 to 14 V

F80-2 (AM21) - Body ground

B - Body ground

+B power supply

Always

9.5 to 14 V

F80-5 (GND2) - Body ground

W-B - Body ground

Ground

Always

Below 1 Ω

F80-6 (GND) - Body ground

W-B - Body ground

Ground

Always

Below 1 Ω

F80-17 (SSW2) - Body ground

R - Body ground

Engine switch signal

Engine switch pushed

Below 1 Ω

F80-17 (SSW2) - Body ground

R - Body ground

Engine switch signal

Engine switch not pushed

10 kΩ or higher

F80-18 (SSW1) - Body ground

LG - Body ground

Engine switch signal

Engine switch pushed

Below 1 Ω

F80-18 (SSW1) - Body ground

LG - Body ground

Engine switch signal

Engine switch not pushed

10 kΩ or higher

F80-24 (LIN2) - Body ground

G - Body ground

LIN line

Always

10 kΩ or higher

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

(c) Reconnect the F80 power management control ECU connector.

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

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

F80-3 (SLP) - F80-6 (GND)

SB - W-B

Steering lock actuator position signal

Steering lock released

Pulse generation

(See waveform 1)

F80-3 (SLP) - F80-6 (GND)

SB - W-B

Steering lock actuator position signal

Steering lock locked

Pulse generation

(See waveform 1)

F80-8 (SLR+) - F80-6 (GND)

GR - W-B

Steering lock motor signal

Steering lock motor operating

Below 1 V

F80-8 (SLR+) - F80-6 (GND)

GR - W-B

Steering lock motor signal

Steering lock motor not operating

11 to 14 V

F80-10 (INDW) - F80-6 (GND)

L - W-B

Warning signal

  • Brake pedal depressed
  • Shift lever in P
  • Engine switch on (ACC) or on (IG)

8 to 14 V

F80-16 (P) - F80-6 (GND)

V - W-B

Shift lock signal

Shift lever in P

8 to 14 V

F80-16 (P) - F80-6 (GND)

V - W-B

Shift lock signal

Shift lever not in P

Below 1 V

F80-19 (ACCD) - F80-6 (GND)

R - W-B

ACC signal

Engine switch on (ACC)

8 to 14 V

F80-19 (ACCD) - F80-6 (GND)

R - W-B

ACC signal

Engine switch off

Below 1 V

F80-20 (IG1D) - F80-6 (GND)

V - W-B

IG1 signal

Engine switch on (IG)

8 to 14 V

F80-20 (IG1D) - F80-6 (GND)

V - W-B

IG1 signal

Engine switch on (ACC)

Below 1 V

F80-22 (INDS) - F80-6 (GND)

B - W-B

Vehicle condition signal

  • Brake pedal depressed
  • Shift lever in P

8 to 14 V

F80-23 (SPD) - F80-6 (GND)

SB - W-B

Vehicle speed signal

Engine switch on (IG), vehicle being driven at approx. 20 km/h (12 mph)

Pulse generation

(See waveform 2)

F81-2 (STA) - F80-6 (GND)

W - W-B

Park/neutral position switch signal

Shift lever in P or N

Below 1 V

F81-3 (STAR) - F80-6 (GND)

B - W-B

Starter signal

  • Brake pedal depressed
  • Shift lever in P
  • Engine cranking

8 to 14 V*

F81-8 (IG2D) - F80-6 (GND)

L - W-B

IG2 signal

Engine switch on (IG)

8 to 14 V

F81-8 (IG2D) - F80-6 (GND)

L - W-B

IG2 signal

Engine switch on (ACC)

Below 1 V

F81-11 (STP1) - F80-6 (GND)

V - W-B

Stop light signal

Brake pedal depressed

8 to 14 V

F81-11 (STP1) - F80-6 (GND)

V - W-B

Stop light signal

Brake pedal released

Below 1 V

  • *: Voltage is output for 0.3 seconds when the engine is cranking. Disconnect the connector from the ECM before measuring the voltage.

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

(e) Using an oscilloscope, check the signal waveform of the ECU.

(1) Waveform 1

Waveform 1 (Reference)

Terminal No. (Symbol)

F80-3 (SLP) - F80-6 (GND)

Tool Setting

2 V/DIV., 100 ms./DIV.

Vehicle Condition

Steering lock locked or released

(2) Waveform 2

Waveform 2 (Reference)

Terminal No. (Symbol)

F80-23 (SPD) - F80-6 (GND)

Tool Setting

5 V/DIV., 10 ms./DIV.

Vehicle Condition

Engine switch on (IG), vehicle being driven at approx. 5 km/h (3 mph)

HINT:

As the vehicle speed increases, the wavelength shortens.

2. CHECK CERTIFICATION ECU


(a) Disconnect the F79 certification ECU 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

F79-1 (+B) - Body ground

V - Body ground

+B power supply

Always

11 to 14 V

F79-15 (E) - Body ground

W-B - Body ground

Ground

Always

Below 1 Ω

F79-29 (LIN) - Body ground

G - Body ground

LIN line

Always

10 kΩ or higher

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

3. CHECK STEERING LOCK ECU


(a) Disconnect the F68 steering lock ECU 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

F68-1 (GND) - Body ground

W-B - Body ground

Ground

Always

Below 1 Ω

F68-6 (IG2) - Body ground

W - Body ground

Ignition power supply

Engine switch on (IG)

11 to 14 V

F68-6 (IG2) - Body ground

W - Body ground

Ignition power supply

Engine switch off

Below 1 V

F68-7 (B) - Body ground

GR - Body ground

+B power supply

Always

11 to 14 V

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

(c) Reconnect the F68 steering lock ECU connector.

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

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

F68-4 (SLP1) - F68-1 (GND)

SB - W-B

Steering lock actuator position signal

Steering lock locked

11 to 14 V

F68-4 (SLP1) - F68-1 (GND)

SB - W-B

Steering lock actuator position signal

Steering lock released

Below 1 V

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