Toyota Tundra Service Manual: Terminals Of Ecu

TERMINALS OF ECU

1. CHECK POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY

(a) Disconnect the N2 master switch connector.

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

for Double Cab:

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

N2-6 (B) - Body ground

P - Body ground

Ignition power supply

Ignition switch OFF

Below 1 V

N2-6 (B) - Body ground

P - Body ground

Ignition power supply

Ignition switch ON

11 to 14 V

N2-1 (E) - Body ground

W-B - Body ground

Ground

Always

Below 1 Ω

for CrewMax:

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

N2-6 (B) - Body ground

P - Body ground

Ignition power supply

Ignition switch OFF

Below 1 V

N2-6 (B) - Body ground

P - Body ground

Ignition power supply

Ignition switch ON

11 to 14 V

N2-1 (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 N2 master switch connector.

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

for Double Cab:

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

N2-3 (U) - N2-1 (E)

LG - W-B

Driver side door power window UP operation

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

Below 1 V → 11 to 14 V

N2-4 (D) - N2-1 (E)

BR - W-B

Driver side door power window DOWN operation

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

Below 1 V → 11 to 14 V

N2-4 (D) - 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

Below 1 V → 11 to 14 V → Below 1 V

N2-16 (U) - N2-1 (E)

Y - W-B

Front passenger side door power window UP operation

Ignition switch ON, front passenger side switch of master switch OFF → UP

Below 1 V → 11 to 14 V

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

L - W-B

Front passenger side door power window DOWN operation

Ignition switch ON, front passenger side switch of master switch OFF → DOWN

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

N2-13 (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

N2-18 (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

for CrewMax:

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

N2-3 (U) - N2-1 (E)

LG - W-B

Driver side door power window UP operation

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

Below 1 V → 11 to 14 V

N2-4 (D) - N2-1 (E)

BR - W-B

Driver side door power window DOWN operation

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

Below 1 V → 11 to 14 V

N2-4 (D) - 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

Below 1 V → 11 to 14 V → Below 1 V

N2-16 (U) - N2-1 (E)

Y - W-B

Front passenger side door power window UP operation

Ignition switch ON, front passenger side switch of master switch OFF → UP

Below 1 V → 11 to 14 V

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

L - W-B

Front passenger side door power window DOWN operation

Ignition switch ON, front passenger side switch of master switch OFF → DOWN

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

N2-13 (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

N2-18 (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

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

*A

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

-

-

*1

Main Body ECU (Multiplex Network Body ECU)

-

-

2. CHECK MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK)

(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

Always

11 to 14 V

A-32 (IG) - Body ground

None - Body ground

IG power supply

Always

11 to 14 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 Master Switch

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