Automatic Transmission System L4 Position Switch Circuit


DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK HARNESS AND CONNECTOR (NO. 1 TRANSFER INDICATOR SWITCH - BODY GROUND)

INSPECT NO. 1 TRANSFER INDICATOR SWITCH (L4 POSITION SWITCH)

CHECK WIRE HARNESS (NO. 1 TRANSFER INDICATOR SWITCH - TCM AND BODY GROUND)

AUTOMATIC TRANSMISSION SYSTEM - L4 Position Switch Circuit


DESCRIPTION

The No. 1 transfer indicator switch (L4 position switch) detects the gear position of the transfer shift lever.
Moving the transfer shift lever to L4 turns the L4 position switch ON. Then the TCM cancels operation of the lock-up clutch.

WIRING DIAGRAM


Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.A340F Automatic Transmission.Automatic Transmission System.Automatic Transmission System  L4 Position Switch Circuit


INSPECTION PROCEDURE

1.CHECK HARNESS AND CONNECTOR (NO. 1 TRANSFER INDICATOR SWITCH - BODY GROUND)
Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.A340F Automatic Transmission.Automatic Transmission System.Automatic Transmission System  L4 Position Switch Circuit
  1. Disconnect the T5 switch connector.

  1. Measure the resistance of the wire harness side connector.

    Standard resistance:
    Tester Connection
    Specified Condition
    T5-2 - Body ground
    Below 1 Ω


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


2.INSPECT NO. 1 TRANSFER INDICATOR SWITCH (L4 POSITION SWITCH)
Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.A340F Automatic Transmission.Automatic Transmission System.Automatic Transmission System  L4 Position Switch Circuit
  1. Remove the transfer indicator switch.

  1. Measure the resistance of the switch when pushing the ball at the tip of the switch.

    Standard resistance:
    Tester Connection
    Switch Condition
    Specified Condition
    1 - 2
    Not pushed
    10 kΩ or higher
    1 - 2
    Pushed
    Below 1 Ω


NG
REPLACE NO. 1 TRANSFER INDICATOR SWITCH (L4 POSITION SWITCH)
OK


3.CHECK WIRE HARNESS (NO. 1 TRANSFER INDICATOR SWITCH - TCM AND BODY GROUND)
Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.A340F Automatic Transmission.Automatic Transmission System.Automatic Transmission System  L4 Position Switch Circuit
  1. Disconnect the T5 switch connector.

  1. Disconnect the T18 TCM connector.

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

    Standard resistance:
    Tester Connection
    Specified Condition
    T5-1 - T18-15 (L4)
    Below 1 Ω
    T18-15 (L4) - Body ground
    10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK

REPLACE TCM