GSIC - Global Service Information Center

# POWER WINDOW CONTROL SYSTEM > TERMINALS OF ECU

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

1. Disconnect the P4 switch connector.

2. 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.

3. Reconnect the P4 switch connector.

4. 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.

5. 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))

1. Disconnect the P4 switch connector.

2. 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.

3. Reconnect the P4 switch connector.

4. 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.

5. 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))

1. Disconnect the P4 switch connector.

2. 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.

3. Reconnect the P4 switch connector.

4. 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.

5. 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))

1. Disconnect the P4 switch connector.

2. 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.

3. Reconnect the P4 switch connector.

4. 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.

5. Check the AUTO light illumination.

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