Toyota 4Runner manuals

Toyota 4Runner: Terminals Of Ecu

TERMINALS OF ECU

1. CHECK SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY (SLIDING ROOF ECU)


(a) Disconnect the S10 sliding roof drive gear sub-assembly connector.

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

HINT:

Measure the values on the wire harness side with the connector disconnected.

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

S10-8 (B) - S10-12 (E)

W - W-B

Battery power supply

Always

11 to 14 V

S10-1 (IG) - S10-12 (E)

L - W-B

IG power supply

Ignition switch off

Below 1 V

S10-1 (IG) - S10-12 (E)

L - W-B

IG power supply

Ignition switch ON

11 to 14 V

S10-12 (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 S10 sliding roof drive gear sub-assembly connector.

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

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

S10-7 (OPN) - S10-12 (E)

LG - W-B

Sliding roof motor open

Ignition switch ON, sliding roof closed

Slide open switch off

11 to 14 V

S10-7 (OPN) - S10-12 (E)

LG - W-B

Sliding roof motor open

Ignition switch ON, sliding roof closed

Slide open switch on

Below 1 V

S10-5 (CLS) - S10-12 (E)

B - W-B

Sliding roof motor close

Ignition switch ON, sliding roof open

Slide close switch off

11 to 14 V

S10-5 (CLS) - S10-12 (E)

B - W-B

Sliding roof motor close

Ignition switch ON, sliding roof open

Slide close switch on

Below 1 V

S10-4 (UP) - S10-12 (E)

R - W-B

Sliding roof motor up

Ignition switch ON, sliding roof tilted downward

Tilt up switch off

11 to 14 V

S10-4 (UP) - S10-12 (E)

R - W-B

Sliding roof motor up

Ignition switch ON, sliding roof tilted downward

Tilt up switch on

Below 1 V

S10-6 (DWN) - S10-12 (E)

P - W-B

Sliding roof motor down

Ignition switch ON, sliding roof tilted upward

Tilt down switch off

11 to 14 V

S10-6 (DWN) - S10-12 (E)

P - W-B

Sliding roof motor down

Ignition switch ON, sliding roof tilted upward

Tilt down switch on

Below 1 V

  • If the result is not as specified, the sliding roof drive gear sub-assembly may have a malfunction.

2. CHECK DRIVER SIDE JUNCTION BLOCK ASSEMBLY, MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)


(a) Remove the main body ECU (multiplex network body ECU) from the driver side junction block assembly (See page ).


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

HINT:

Measure the values on the wire harness side with the connector disconnected.

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

A-30 (BECU) - Body ground

-

Battery power supply

Ignition switch off

11 to 14 V

A-31 (ALTB) - Body ground

-

Battery power supply

Ignition switch off

11 to 14 V

A-32 (IG) - Body ground

-

Ignition switch power supply

Ignition switch ON

11 to 14 V

A-32 (IG) - Body ground

-

Ignition switch power supply

Ignition switch off

Below 1 V

A-29 (ACC) - Body ground

-

ACC power supply

Ignition switch ACC

11 to 14 V

A-29 (ACC) - Body ground

-

ACC power supply

Ignition switch off

Below 1 V

A-11 (GND1) - Body ground

-

Ground

Always

Below 1 Ω

F10-3 (GND2) - Body ground

W-B - Body ground

Ground

Always

Below 1 Ω

F9-17 (KSW)* - Body ground

B - Body ground

Unlock warning switch input

No key in ignition key cylinder

10 kΩ or higher

F9-17 (KSW)* - Body ground

B - Body ground

Unlock warning switch input

Key in ignition key cylinder

Below 1 Ω

  • *: w/o Smart Key System

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

(c) Reconnect the main body ECU (multiplex network body ECU).

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

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

2F-27 (FLCY) - Body ground

R - Body ground

Front door courtesy switch LH input

Front door LH open

Below 1 V

2F-27 (FLCY) - Body ground

R - Body ground

Front door courtesy switch LH input

Front door LH closed

11 to 14 V

2B-15 (FRCY) - Body ground

B - Body ground

Front door courtesy switch RH input

Front door RH open

Below 1 V

2B-15 (FRCY) - Body ground

B - Body ground

Front door courtesy switch RH input

Front door RH closed

11 to 14 V

F9-11 (L2) - Body ground

LG - Body ground

Driver side door key-linked lock input

Driver side door key cylinder turned to lock

Below 1 V

F9-11 (L2) - Body ground

LG - Body ground

Driver side door key-linked lock input

Driver side door key cylinder off

11 to 14 V

F9-24 (UL3) - Body ground

GR - Body ground

Driver side door key-linked unlock input

Driver side door key cylinder turned to unlock

Below 1 V

F9-24 (UL3) - Body ground

GR - Body ground

Driver side door key-linked unlock input

Driver side door key cylinder off

11 to 14 V

F9-26 (RDA)* - Body ground

P - Body ground

Door control receiver input

No key in ignition key cylinder, all doors closed and transmitter switch off → on

Pulse generation

  • *: w/o Smart Key System

If the result is not as specified, the main body ECU (multiplex network body ECU) or driver side junction block assembly may have a malfunction.

3. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) (w/ Smart Key System)


(a) Disconnect the F79 certification ECU (smart key ECU assembly) connector.

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

HINT:

Measure the values on the wire harness side with the connector disconnected.

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

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

V - W-B

Battery power supply

Always

11 to 14 V

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

L - W-B

Battery power supply

Always

11 to 14 V

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

W - W-B

Ignition power supply

Ignition switch off → ON

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 certification ECU (smart key ECU assembly) 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

F78-5 (RCO) - F79-15 (E)

L - W-B

Door control receiver power source

Ignition switch off, all doors closed and transmitter switch not pressed → pressed

Below 1 V → 4.5 to 5.5 V

F78-15 (RDA) - F79-15 (E)

G - W-B

Door control receiver data input signal

Ignition switch off

11 to 14 V pulse generation at regular intervals

F78-16 (RSSI) - F79-15 (E)

P - W-B

Door control receiver electric wave existence signal

All doors locked, all doors closed and transmitter switch not pressed → pressed

11 to 14 V → Below 2 V

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

Problem Symptoms Table
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Dtc Check / Clear
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How To Proceed With Troubleshooting
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