Toyota 4Runner manuals

Toyota 4Runner: Terminals Of Ecu

TERMINALS OF ECU

1. CHECK ENGINE SWITCH


(a) Disconnect the F71 switch connector.

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

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

F71-8 (AGND) - Body ground

GR - Body ground

Ground

Always

Below 1 Ω

F71-5 (GND) - Body ground

W-B - 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 F71 switch connector.

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

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

F71-9 (TXCT) - F71-8 (AGND)

W - GR

Key code output signal

Engine switch off, 30 seconds or more after door opened or closed and brake pedal not depressed

Below 1 V

F71-9 (TXCT) - F71-8 (AGND)

W - GR

Key code output signal

Engine switch off, key not in cabin and 30 seconds or less after engine switch pushed

Pulse generation

(see waveform 1)

F71-10 (CODE) - F71-8 (AGND)

V - GR

Demodulated signal of key code data

Engine switch off, 30 seconds or more after door opened or closed and brake pedal not depressed

Below 1 V

F71-10 (CODE) - F71-8 (AGND)

V - GR

Demodulated signal of key code data

Engine switch off, key held against engine switch and engine switch pushed*

Pulse generation

(see waveform 2)

F71-11 (SWIL) - F71-5 (GND)

SB - W-B

Illumination signal

Engine switch off, light control rheostat fully turned upward and Light control switch off → tail

Below 2 V → 9 to 14 V

F71-14 (VC5) - F71-8 (AGND)

P - GR

Power supply

Engine switch off, 30 seconds or more after door opened or closed and brake pedal not depressed

Below 1 V

F71-14 (VC5) - F71-8 (AGND)

P - GR

Power supply

Engine switch off, key not in cabin and 30 seconds or less after engine switch pushed

Pulse generation

(see waveform 3)

HINT:

*: Remove the key battery before performing this inspection.

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

(e) Inspect using an oscilloscope.

(1) Waveform 1 (Reference)

Measurement Condition

Item

Content

Tester Connection

F71-9 (TXCT) - F71-8 (AGND)

Tool Setting

2 V/DIV., 20 ms./DIV.

Condition

Engine switch off, key not in cabin and 30 seconds or less after engine switch pushed

(2) Waveform 2 (Reference)

Measurement Condition

Item

Content

Tester Connection

F71-10 (CODE) - F71-8 (AGND)

Tool Setting

2 V/DIV., 20 ms./DIV.

Condition

Engine switch off, key held against engine switch and engine switch pushed*

HINT:

*: Remove the key battery before performing this inspection.

(3) Waveform 3 (Reference)

Measurement Condition

Item

Content

Tester Connection

F71-14 (VC5) - F71-8 (AGND)

Tool Setting

2 V/DIV., 20 ms./DIV.

Condition

Engine switch off, key not in cabin and 30 seconds or less after engine switch pushed

2. CHECK CERTIFICATION ECU


(a) Disconnect the F79 ECU connector.

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

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

F79-1 (+B) - F79-15 (E)

V - W-B

+B power supply

Always

11 to 14 V

F79-17 (CUTB) - F79-15 (E)

L - W-B

+B power supply

Always

11 to 14 V

F79-16 (IG) - F79-15 (E)

W - W-B

Ignition power supply

Engine switch off → on (IG)

Below 1 V → 11 to 14 V

F79-15 (E) - Body ground

W-B - 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 F79 ECU connector.

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

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

F79-2 (IND) - F79-15 (E)

L - W-B

Security indicator output

Engine switch off → on (IG)

Pulse generation

→ Below 2 V

F79-11 (SWIL) - F79-36 (AGND)

SB - GR

Illumination signal

Engine switch off, light control rheostat fully turned upward and Light control switch off

Below 2 V

F79-11 (SWIL) - F79-36 (AGND)

SB - GR

Illumination signal

Engine switch off, light control rheostat fully turned upward and Light control switch tail

9 to 14 V

F79-12 (TXCT) - F79-36 (AGND)

W - GR

Engine switch TXCT output

Engine switch off, 30 seconds or more after door opened or closed and brake pedal not depressed

Below 1 V

F79-12 (TXCT) - F79-36 (AGND)

W - GR

Engine switch TXCT output

Engine switch off, key not in cabin and 30 seconds or less after engine switch pushed

Pulse generation

(see waveform 1)

F79-13 (CODE) - F79-36 (AGND)

V - GR

Engine switch CODE input

Engine switch off, 30 seconds or more after door opened or closed and brake pedal not depressed

Below 1 V

F79-13 (CODE) - F79-36 (AGND)

V - GR

Engine switch CODE input

Engine switch off, key held against engine switch and engine switch pushed*

Pulse generation

(see waveform 2)

F79-28 (VC5) - F79-36 (AGND)

P - GR

Engine switch power supply

Engine switch off, 30 seconds or more after door opened or closed and brake pedal not depressed

Below 1 V

F79-28 (VC5) - F79-36 (AGND)

P - GR

Engine switch power supply

Engine switch off, key not in cabin and 30 seconds or less after engine switch pushed

Pulse generation

(see waveform 3)

F79-36 (AGND) - Body ground

GR - Body ground

Engine switch ground

Always

Below 1 Ω

HINT:

*: Remove the key battery before performing this inspection.

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

(e) Inspect using an oscilloscope.

(1) Waveform 1 (Reference)

Measurement Condition

Item

Content

Tester Connection

F79-12 (TXCT) - F79-36 (AGND)

Tool Setting

2 V/DIV., 20 ms./DIV.

Condition

Engine switch off, key not in cabin and 30 seconds or less after engine switch pushed

(2) Waveform 2 (Reference)

Measurement Condition

Item

Content

Tester Connection

F79-13 (CODE) - F79-36 (AGND)

Tool Setting

2 V/DIV., 20 ms./DIV.

Condition

Engine switch off, key held against engine switch and engine switch pushed*

HINT:

*: Remove the key battery before performing this inspection.

(3) Waveform 3 (Reference)

Measurement Condition

Item

Content

Tester Connection

F79-28 (VC5) - F79-36 (AGND)

Tool Setting

2 V/DIV., 20 ms./DIV.

Condition

Engine switch off, key not in cabin and 30 seconds or less after engine switch pushed

3. CHECK ID CODE BOX


(a) Disconnect the F72 box connector.

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

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

F72-1 (+B) - F72-8 (GND)

V - W-B

+B power supply

Always

11 to 14 V

F72-8 (GND) - Body ground

W-B - 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 F72 box connector.

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

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

F72-5 (EFII) - F72-8 (GND)

SB - W-B

ECM input signal

Within 3 seconds after starter operates and initial combustion occurs, or within 3 seconds after engine switch first turned on (IG) after battery disconnected and connected

11 to 14 V → Pulse generation

(see waveform 1)

F72-6 (EFIO) - F72-8 (GND)

W - W-B

ECM output signal

Engine switch off → on (IG)

11 to 14 V → Pulse generation

(see waveform 2)

If the result is not as specified, the ID code box may have a malfunction.

(e) Inspect using an oscilloscope.

(1) Waveform 1 (Reference)

Measurement Condition

Item

Content

Tester Connection

F72-5 (EFII) - F72-8 (GND)

Tool Setting

5 V/DIV., 500 ms./DIV.

Condition

Within 3 seconds after starter operates and initial combustion occurs, or within 3 seconds after engine switch first turned on (IG) after battery disconnected and connected

(2) Waveform 2 (Reference)

Measurement Condition

Item

Content

Tester Connection

F72-6 (EFIO) - F72-8 (GND)

Tool Setting

10 V/DIV., 100 ms./DIV.

Condition

Engine switch on (IG)

4. CHECK STEERING LOCK ACTUATOR ASSEMBLY (STEERING LOCK ECU)


(a) Disconnect the F68 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) - F68-1 (GND)

W - W-B

IG2 signal input

Engine switch off → on (IG)

Below 1 V → 11 to 14 V

F68-7 (B) - Body ground

GR - Body ground

Power source

Always

11 to 14 V

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

5. CHECK POWER MANAGEMENT CONTROL ECU


(a) Disconnect the F80 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

Battery power

Always

11 to 14 V

F80-2 (AM21) - Body ground

B - Body ground

Battery power

Always

11 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

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

6. CHECK ECM


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

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

F50-20 (IMO) - Body ground

SB - Body ground

Transponder key ECU output signal

Within 3 seconds after starter operates and initial combustion occurs, or within 3 seconds after engine switch first turned on (IG) after battery disconnected and connected

11 to 14 V → Pulse generation

(see waveform 1)

F50-14 (IMI) - Body ground

W - Body ground

Transponder key ECU input signal

Engine switch off → on (IG)

11 to 14 V → Pulse generation

(see waveform 2)

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

(b) Inspect using an oscilloscope.

(1) Waveform 1 (Reference)

Measurement Condition

Item

Content

Tester Connection

F50-20 (IMO) - Body ground

Tool Setting

5 V/DIV., 500 ms./DIV.

Condition

Within 3 seconds after starter operates and initial combustion occurs, or within 3 seconds after engine switch first turned on (IG) after battery disconnected and connected

(2) Waveform 2 (Reference)

Measurement Condition

Item

Content

Tester Connection

F50-14 (IMI) - Body ground

Tool Setting

10 V/DIV., 100 ms./DIV.

Condition

Engine switch on (IG)

Problem Symptoms Table
PROBLEM SYMPTOMS TABLE HINT: Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are lis ...

Data List / Active Test
DATA LIST / ACTIVE TEST 1. READ DATA LIST HINT: Using the Techstream to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing ...

Other materials about Toyota 4Runner:

Back Door Power Window Position/Seal Characteristics Data is not Memorized (B2313)
DESCRIPTION The power window regulator motor is driven by operating the back door power window regulator switch. The power window regulator motor assembly has a motor and ECU. When the ECU determines that the power window regulator motor has not been initi ...

Removal
REMOVAL CAUTION / NOTICE / HINT CAUTION: Wear protective gloves. Sharp areas on the parts may injure your hands. PROCEDURE 1. REMOVE REAR SEAT HEADREST ASSEMBLY (a) Remove the headrest. 2. REMOVE REAR SEAT TRACK INNER BRACKET COVER (a) Using a mouldi ...

© 2016-2020 | www.to4runner.net

0.0066