Toyota Tundra Service Manual: Terminals Of Ecu

TERMINALS OF ECU

1. CHECK FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY LH

(a) Disconnect the N12 motor 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

N12-2 (B) - Body ground

P - Body ground

Battery power supply

Always

11 to 14 V

N12-1 (GND) - Body ground

W-B - Body ground

Ground

Always

Below 1 Ω

(c) Reconnect the N12 motor connector.

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

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

N12-10 (UP) - N12-1 (GND)

BE - W-B

Power window UP operation

Ignition switch ON

Master switch

OFF → UP

11 to 14 V → Below 1 V

N12-10 (UP) - N12-1 (GND)

BE - W-B

Power window UP operation

Ignition switch ON

Door glass fully open → power window AUTO UP operation → door glass fully closed

11 to 14 V → Below 1 V → 11 to 14 V

N12-7 (DOWN) - N12-1 (GND)

BR - W-B

Power window DOWN operation

Ignition switch ON

Master switch

OFF → DOWN

11 to 14 V → Below 1 V

N12-7 (DOWN) - N12-1 (GND)

BR - W-B

Power window DOWN operation

Ignition switch ON

Door glass fully closed → power window AUTO DOWN operation → door glass fully open

11 to 14 V → Below 1 V → 11 to 14 V

If the result is not as specified, the motor may be malfunctioning.

2. CHECK FRONT POWER WINDOW REGULATOR MOTOR RH

(a) Disconnect the M11 motor 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

M11-2 (B) - Body ground

V - Body ground

Battery power supply

Always

11 to 14 V

M11-1 (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 M11 motor connector.

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

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

M11-10 (UP) - M11-1 (GND)

G - W-B

Power window UP operation

Ignition switch ON

Power window regulator switch assembly

OFF → UP

11 to 14 V → Below 1 V

M11-10 (UP) - M11-1 (GND)

G - W-B

Power window UP operation

Ignition switch ON

Door glass fully open → power window AUTO UP operation → door glass fully closed

11 to 14 V → Below 1 V → 11 to 14 V

M11-7 (DOWN) - M11-1 (GND)

P - W-B

Power window DOWN operation

Ignition switch ON

Power window regulator switch assembly

OFF → DOWN

11 to 14 V → Below 1 V

M11-7 (DOWN) - M11-1 (GND)

P - W-B

Power window DOWN operation

Ignition switch ON

Door glass fully closed → power window AUTO DOWN operation → door glass fully open

11 to 14 V → Below 1 V → 11 to 14 V

M11-4 (AUTO) - M11-1 (GND)

B - W-B

Power window AUTO UP/DOWN operation

Ignition switch ON

Power window regulator switch assembly

OFF → AUTO UP/DOWN operation

11 to 14 V → Below 1 V

(e) Measure the pulse according to the value(s) in the table below.

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

M11-9 (LIN) - M11-1 (GND)

L - W-B

LIN communication signal

Ignition switch ON

Pulse generation

3. CHECK POWER WINDOW REGULATOR MASTER SWITCH

(a) Disconnect the N2 master switch 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

N2-3 (B) - Body ground

R - Body ground

Battery power supply

Always

11 to 14 V

N2-13 (B) - Body ground

G - Body ground

Battery power supply

Ignition switch ON

11 to 14 V

N2-1 (E) - Body ground

W-B - Body ground

Ground

Always

Below 1 Ω

(c) Reconnect the N2 master 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

N2-4 (UP) - N2-1 (E)

BE - W-B

Driver side door power window UP operation

Ignition switch ON, driver side switch of master switch OFF → UP

11 to 14 V → Below 1 V

N2-4 (UP) - N2-1 (E)

BE - W-B

Driver side door power window AUTO UP operation

Ignition switch ON, driver side door glass fully open → power window AUTO UP operation → driver side door glass fully closed

11 to 14 V → Below 1 V → 11 to 14 V

N2-5 (DOWN) - N2-1 (E)

BR - W-B

Driver side door power window DOWN operation

Ignition switch ON, driver side switch of master switch OFF → DOWN

11 to 14 V → Below 1 V

N2-5 (DOWN) - N2-1 (E)

BR - W-B

Driver side door power window AUTO DOWN operation

Ignition switch ON, driver side door glass fully closed → power window AUTO DOWN operation → driver side door glass fully open

11 to 14 V → Below 1 V → 11 to 14 V

N2-12 (U) - N2-1 (E)

V - W-B

Rear LH side door power window UP operation

Ignition switch ON, rear LH switch of master switch OFF → UP

Below 1 V → 11 to 14 V

N2-15 (D) - N2-1 (E)

B - W-B

Rear LH side door power window DOWN operation

Ignition switch ON, rear LH switch of master switch OFF → DOWN

Below 1 V → 11 to 14 V

N2-10 (U) - N2-1 (E)

BE - W-B

Rear RH side door power window UP operation

Ignition switch ON, rear RH switch of master switch OFF → UP

Below 1 V → 11 to 14 V

N2-16 (D) - N2-1 (E)

LG - W-B

Rear RH side door power window DOWN operation

Ignition switch ON, rear RH switch of master switch OFF → DOWN

Below 1 V → 11 to 14 V

*A

Main Body ECU (Multiplex Network Body ECU) with 1 connector

-

-

*1

Main Body ECU (Multiplex Network Body ECU)

-

-

*A

Main Body ECU (Multiplex Network Body ECU) with 3 connectors

-

-

*1

Main Body ECU (Multiplex Network Body ECU)

-

-

4. CHECK DRIVER SIDE JUNCTION BLOCK ASSEMBLY AND MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

(a) Remove the main body ECU (multiplex network body ECU) from the cowl side junction block LH.

Click here

(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

A-30 (ACC) - Body ground

None - Body ground

ACC power supply

Ignition switch ON

11 to 14 V

Ignition switch off

Below 1 V

A-32 (IG) - Body ground

None - Body ground

IG power supply

Ignition switch ON

11 to 14 V

Ignition switch off

Below 1 V

A-11 (GND1) - Body ground

None - Body ground

Body ground

Always

Below 1 Ω

J165-6 (FLCY) - Body ground

GR - Body ground

Front door courtesy light switch LH signal

Front door LH open

Below 1 Ω

Front door LH closed

10 kΩ or higher

J165-27 (FRCY) - Body ground

W - Body ground

Front door courtesy light switch RH signal

Front door RH open

Below 1 Ω

Front door RH closed

10 kΩ or higher

    System Diagram

    Power Window Control System(w/o Jam Protection Function)

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