POWER WINDOW CONTROL SYSTEM > TERMINALS OF ECU

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CHECK POWER WINDOW REGULATOR MASTER SWITCH (LHD (Single cab, Extra cab))

Disconnect the P4 switch connector.

Measure the voltage and resistance of the wire harness side connector.

Symbols (Terminal No.)
Wiring Color
Terminal Description
Condition
Specified Condition
B (P4-9) - Body ground
L - Body ground
Ignition power supply
Ignition switch OFF
Below 1 V
B (P4-9) - Body ground
L - Body ground
Ignition power supply
Ignition switch ON
10 to 14 V
E (P4-1) - 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.

Reconnect the P4 switch connector.

Measure the voltage of the connector.

Symbols (Terminal No.)
Wiring Color
Terminal Description
Condition
Specified Condition
DU (P4-3) - E (P4-1)
B - W-B
Power window motor UP output
Ignition switch ON, driver side power window switch OFF → UP (manual operation)
Below 1 V → 10 to 14 V
DD (P4-4) - E (P4-1)
L-R - W-B
Power window motor DOWN output
Ignition switch ON, driver side power window switch OFF → DOWN (manual operation)
Below 1 V → 10 to 14 V
DD (P4-4) - E (P4-1)
L-R - W-B
Power window motor DOWN output
Ignition switch ON, driver side power window fully closed → driver side power window switch DOWN (AUTO operation) → driver side power window fully open
Below 1 V → 10 to 14 V → Below 1 V
If the result is not as specified, the master switch may have a malfunction.

Check the AUTO light illumination.
1. After turning the ignition switch ON, check that the AUTO light illuminates (green).

CHECK POWER WINDOW REGULATOR MASTER SWITCH (RHD (Single cab, Extra cab))

Disconnect the P4 switch connector.

Measure the voltage and resistance of the wire harness side connector.

Symbols (Terminal No.)
Wiring Color
Terminal Description
Condition
Specified Condition
B (P4-9) - Body ground
L - Body ground
Ignition power supply
Ignition switch OFF
Below 1 V
B (P4-9) - Body ground
L - Body ground
Ignition power supply
Ignition switch ON
10 to 14 V
E (P4-10) - 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.

Reconnect the P4 switch connector.

Measure the voltage of the connector.

Symbols (Terminal No.)
Wiring Color
Terminal Description
Condition
Specified Condition
DU (P4-2) - E (P4-10)
R - W-B
Power window motor UP output
Ignition switch ON, driver side power window switch OFF → UP (manual operation)
Below 1 V → 10 to 14 V
DD (P4-5) - E (P4-10)
L-R - W-B
Power window motor DOWN output
Ignition switch ON, driver side power window switch OFF → DOWN (manual operation)
Below 1 V → 10 to 14 V
DD (P4-5) - E (P4-10)
L-R - W-B
Power window motor DOWN output
Ignition switch ON, driver side power window fully closed → driver side power window switch DOWN (AUTO operation) → driver side power window fully open
Below 1 V → 10 to 14 V → Below 1 V
If the result is not as specified, the master switch may have a malfunction.

Check the AUTO light illumination.
1. After turning the ignition switch ON, check that the AUTO light illuminates (green).

CHECK POWER WINDOW REGULATOR MASTER SWITCH (LHD (Double cab))

Disconnect the P4 switch connector.

Measure the voltage and resistance of the wire harness side connector.

Symbols (Terminal No.)
Wiring Color
Terminal Description
Condition
Specified Condition
B (P4-6) - Body ground
L - Body ground
Ignition power supply
Ignition switch OFF
Below 1 V
B (P4-6) - Body ground
L - Body ground
Ignition power supply
Ignition switch ON
10 to 14 V
E (P4-3) - 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.

Reconnect the P4 switch connector.

Measure the voltage of the connector.

Symbols (Terminal No.)
Wiring Color
Terminal Description
Condition
Specified Condition
DU (P4-4) - E (P4-3)
R - W-B
Power window motor UP output
Ignition switch ON, driver side power window switch OFF → UP (manual operation)
Below 1 V → 10 to 14 V
DD (P4-9) - E (P4-3)
L-R - W-B
Power window motor DOWN output
Ignition switch ON, driver side power window switch OFF → DOWN (manual operation)
Below 1 V → 10 to 14 V
DD (P4-9) - E (P4-3)
L-R - W-B
Power window motor DOWN output
Ignition switch ON, driver side power window fully closed → driver side power window switch DOWN (AUTO operation) → driver side power window fully open
Below 1 V → 10 to 14 V → Below 1 V
If the result is not as specified, the master switch may have a malfunction.

Check the AUTO light illumination.
1. After turning the ignition switch ON, check that the AUTO light illuminates (green).

CHECK POWER WINDOW REGULATOR MASTER SWITCH (RHD (Double cab))

Disconnect the P4 switch connector.

Reconnect the P4 switch connector.

Measure the voltage of the connector.

Symbols (Terminal No.)
Wiring Color
Terminal Description
Condition
Specified Condition
DU (P4-4) - E (P4-3)
B - W-B
Power window motor UP output
Ignition switch ON, driver side power window switch OFF → UP (manual operation)
Below 1 V → 10 to 14 V
DD (P4-9) - E (P4-3)
L-R - W-B
Power window motor DOWN output
Ignition switch ON, driver side power window switch OFF → DOWN (manual operation)
Below 1 V → 10 to 14 V
DD (P4-9) - E (P4-3)
L-R - W-B
Power window motor DOWN output
Ignition switch ON, driver side power window fully closed → driver side power window switch DOWN (AUTO operation) → driver side power window fully open
Below 1 V → 10 to 14 V → Below 1 V
If the result is not as specified, the master switch may have a malfunction.

Check the AUTO light illumination.
1. After turning the ignition switch ON, check that the AUTO light illuminates (green).

Symbols (Terminal No.)	Wiring Color	Terminal Description	Condition	Specified Condition
B (P4-9) - Body ground	L - Body ground	Ignition power supply	Ignition switch OFF	Below 1 V
B (P4-9) - Body ground	L - Body ground	Ignition power supply	Ignition switch ON	10 to 14 V
E (P4-1) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω