Toyota 4Runner manuals

Toyota 4Runner: Terminals Of Ecu

TERMINALS OF ECU

1. CHECK TIRE PRESSURE WARNING ECU

HINT:

Inspect the connector from the back side.


(a) Disconnect the F7 ECU connector.

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

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

F7-7 (IG) - F7-9 (GND)

G - W-B

IG power source

Ignition switch ON

11 to 14 V

(c) Connect the F7 ECU 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

F7-2 (SPD) - F7-9 (GND)

SB - W-B

Vehicle speed signal

Vehicle being driven

Pulse generation

(see waveform 1)

F7-3 (TC) - F7-9 (GND)

R - W-B

TC terminal

Terminal TC not connected

11 to 14 V

F7-4 (TACH) - F7-9 (GND)

P - W-B

Engine speed signal

Engine running

Pulse generation (see waveform 2)

F7-5 (IND) - F7-9 (GND)

G - W-B

Tire pressure warning light output signal

After ignition switch turned to ON, tire pressure warning light illuminates for 3 seconds

0.9 to 3.2 V

Ignition switch ON

Tire pressure warning light off

3.2 V or higher

F7-6 (RF5V) - F7-9 (GND)

LG - W-B

Tire pressure warning antenna and receiver power source

Ignition switch ON

4.5 to 5.5 V

F7-9 (GND) - Body ground

W-B - Body ground

Ground

Always

Below 1 Ω

F7-10 (SIL) - F7-9 (GND)

G - W-B

Diagnosis tester communication line

Ignition switch ON

Communication not performed with tester

11 to 14 V

F7-11 (GND2) - F7-9 (GND)

GR - W-B

Tire pressure warning antenna and receiver ground

Always

Below 1 Ω

F7-12 (RDA) - F7-9 (GND)

SB - W-B

Tire pressure warning antenna and receiver signal

Ignition switch ON

11 to 14 V

(e) Using an oscilloscope, check waveform 1.


Item

Contents

Terminal No. (Symbol)

F7-2 (SPD) - F7-9 (GND)

Tool Setting

5 V/DIV., 200 ms/DIV.

Vehicle Condition

Vehicle being driven at approximately 20 km/h (12 mph)

HINT:

The wavelength becomes shorter as the vehicle speed increases.

(f) Using an oscilloscope, check waveform 2.


Item

Contents

Terminal No. (Symbol)

F7-4 (TACH) - F7-9 (GND)

Tool Setting

5 V/DIV., 10 ms/DIV.

Vehicle Condition

Idling

HINT:

The wavelength becomes shorter as the engine speed increases.

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 ...

Diagnosis System
DIAGNOSIS SYSTEM 1. CHECK WARNING LIGHT NOTICE: When there is a problem with the tire pressure warning system, the tire pressure warning light blinks at 0.5 second intervals and comes o ...

Other materials about Toyota 4Runner:

Open in CAN Main Wire
DESCRIPTION There may be an open circuit in the CAN main wire and/or DLC3 branch wire when the resistance between terminals 6 (CANH) and 14 (CANL) of the DLC3 is 69 Ω or higher. Symptom Trouble Area The resistance be ...

On-vehicle Inspection
ON-VEHICLE INSPECTION PROCEDURE 1. INSPECT VEHICLE HEIGHT NOTICE: Perform the calibration on a level surface. Perform the calibration with the vehicle empty. Make sure that the wheels are on the ground and facing straight ahead. Perf ...

© 2016-2021 | www.to4runner.net

0.0061