GSIC - Global Service Information Center

### POWER WINDOW CONTROL SYSTEM > Power Windows do not Operate at All

## for Preparation Click here

## DESCRIPTION

If all of the power windows do not operate, the power window regulator master switch may have no power or may be malfunctioning.

## WIRING DIAGRAM

## INSPECTION PROCEDURE

1.INSPECT FUSE (ECU-IG & GAUGE)

1. Remove the ECU-IG & GAUGE fuse from the instrument panel junction block.

1. Measure the resistance of the fuse.

   Standard resistance:
     Below 1 Ω

| NG |

REPLACE FUSE

OK |

2.INSPECT RELAY (Marking: IG1)

1. Remove the IG1 relay from the No. 3 relay block.

1. Measure the resistance of the relay.

   Standard resistance:

     Tester Connection | Specified Condition
     3 - 5 | 10 kΩ or higher
     3 - 5 | Below 1 Ω (when battery voltage is applied to terminals 1 and 2)

| NG |

REPLACE RELAY

OK |

3.CHECK WIRE HARNESS (MASTER SWITCH - BATTERY AND BODY GROUND)

1. LHD:

   1. Disconnect the P4 master switch connector.

   2. Measure the voltage of the wire harness side connectors.

      Standard voltage:
        Single cab, Extra cab

        Tester Connection | Condition | Specified Condition
        P4-9 (B) - Body ground | Ignition switch ON | 10 to 14 V

        Double cab

        Tester Connection | Condition | Specified Condition
        P4-6 (B) - Body ground | Ignition switch ON | 10 to 14 V

   3. Measure the resistance of the wire harness side connectors.

      Standard resistance:
        Single cab, Extra cab

        Tester Connection | Specified Condition
        P4-1 (E) - Body ground | Below 1 Ω

        Double cab

        Tester Connection | Specified Condition
        P4-3 (E) - Body ground | Below 1 Ω

1. RHD:

   1. Disconnect the P4 master switch connector.

   2. Measure the voltage of the wire harness side connectors.

      Standard voltage:
        Single cab, Extra cab

        Tester Connection | Condition | Specified Condition
        P4-9 (B) - Body ground | Ignition switch ON | 10 to 14 V

        Double cab

        Tester Connection | Condition | Specified Condition
        P4-6 (B) - Body ground | Ignition switch ON | 10 to 14 V

   3. Measure the resistance of the wire harness side connectors.

      Standard resistance:
        Single cab, Extra cab

        Tester Connection | Specified Condition
        P4-10 (E) - Body ground | Below 1 Ω

        Double cab

        Tester Connection | Specified Condition
        P4-3 (E) - Body ground | Below 1 Ω

| NG |

REPAIR OR REPLACE HARNESS AND CONNECTOR

OK |

4.INSPECT IGNITION SWITCH ASSEMBLY

1. Remove the ignition switch.

1. Measure the resistance of the switch.

   Standard resistance:

     Tester Connection | Switch Position | Specified Condition
     1 (IG1) - 4 (AM1) | OFF | 10 kΩ or higher
     1 (IG1) - 4 (AM1) | ON | Below 1 Ω

| NG |

REPLACE IGNITION SWITCH ASSEMBLY

OK |

REPLACE POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY