Toyota 4Runner: Terminals Of Ecu

Toyota 4Runner Service Manual / Vehicle Interior / Theft Deterrent / Keyless Entry / Smart Key System(for Start Function) / 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.

(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.

(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.

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:

Off-road vehicle feature
• Specific design characteristics give it a higher center of gravity than ordinary passenger cars. This vehicle design feature causes this type of vehicle to be more likely to rollover. And, utility vehicles have a significantly higher rollover rate th ...

Disassembly
DISASSEMBLY PROCEDURE 1. REMOVE TRANSMISSION CONTROL SHAFT LEVER LH (a) Remove the nut, spring washer and control shaft lever LH. 2. REMOVE PARK/NEUTRAL POSITION SWITCH ASSEMBLY (a) Using a screwdriver, bend the tabs of the lock washer. (b) Remove th ...