Toyota 4Runner manuals

Toyota 4Runner: Terminals Of Ecu

TERMINALS OF ECU

1. AIR CONDITIONING AMPLIFIER

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


Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

F87-9 (ROUT) - Body ground

LG - Body ground

Output climate control signal (Front passenger side)

Engine switch on (IG)

Refreshing seat switch RH blower side level 3

Pulse generation

(see waveform 1)

F87-10 (LOUT) - Body ground

L - Body ground

Output climate control signal (Driver side)

Engine switch on (IG)

Refreshing seat switch LH blower side level 3

Pulse generation

(see waveform 1)

F87-15 (SW 5) - Body ground

W - Body ground

Input climate control signal (Front passenger side)

Engine switch on (IG)

Refreshing seat switch RH level 0

4.5 to 5.5 V

Engine switch on (IG)

Refreshing seat switch RH blower side level 3

Below 1 V

F87-16 (SW 4) - Body ground

V - Body ground

Input climate control signal (Driver side)

Engine switch on (IG)

Refreshing seat switch LH level 0

4.5 to 5.5 V

Engine switch on (IG)

Refreshing seat switch LH blower side level 3

Below 1 V

F42-31 (S5-4) - Body ground

V - Body ground

Power supply

Engine switch on (IG)

4.5 to 5.5 V

F42-35 (SG-4) - Body ground

SB - Body ground

Ground

Always

Below 1 Ω

If the result is not as specified, the air conditioning amplifier may have a malfunction.

(1) Using an oscilloscope, check waveform 1.

Waveform 1 (Reference)

Item

Content

Terminal No. (Symbol)

F87-9 (ROUT) - Body ground

F87-10 (LOUT) - Body ground

Tool Setting

2 V/DIV., 500 μsec/DIV.

Condition

Engine switch on (IG)

Refreshing seat switch blower side level 3

On-vehicle Inspection
ON-VEHICLE INSPECTION PROCEDURE 1. INSPECT SEAT HEATER CONTROL SUB-ASSEMBLY LH (a) Disconnect the b24 seat heater control sub-assembly LH connector. ...

Front Power Seat Control System(w/ Memory)
...

Other materials about Toyota 4Runner:

Air conditioning filter
The air conditioning filter must be changed regularly to maintain air conditioning efficiency. Removal method Turn the engine switch (vehicles without a smart key system) or “ENGINE START STOP” switch (vehicles with a smart key system) off. Ope ...

Tire inflation pressure
Tire inflation pressure The recommended cold tire inflation pressure and tire size are displayed on the tire and loading information label. Inspection and adjustment procedure 1. Tire valve 2. Tire pressure gauge Remove the tire valve cap. Press t ...

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