ELECTRONIC CONTROLLED AUTOMATIC TRANSMISSION SYSTEM (for 1GR-FE), Diagnostic DTC:P0818

DTC Code DTC Name
P0818 Driveline Disconnect Switch Input Circuit

DESCRIPTION

The ECM detects the signal from the transfer neutral position switch.

This DTC indicates that the transfer neutral position switch remains ON.

DTC Code DTC Detection Condition Trouble Area
P0818

Transfer neutral position switch remains ON while vehicle is running under following conditions for 30 sec. (2 trip detection logic):


  • Vehicle speed is 25 km/h (16 mph) or more

  • Transfer shift lever is on H

  • Short in transfer neutral position switch circuit

  • Transfer neutral position switch

  • ECM

MONITOR DESCRIPTION

The ECM detects whether or not the transfer shift lever is in neutral by monitoring the signal from the transfer neutral position switch.

If the ECM detects that the transfer shift lever is in neutral under the following conditions, the ECM will conclude that there is a malfunction of the transfer neutral position switch:


If all of the above conditions are detected, the ECM will conclude that there is a malfunction of the transfer neutral position switch, illuminate the MIL and store the DTC.

WIRING DIAGRAM

A01DYLYE05

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK WIRE HARNESS (NO. 2 TRANSFER INDICATOR SWITCH - BODY GROUND)


    1. A01DXJ2E01

      Disconnect the T5 switch connector.

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

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

    NG

    REPLACE COMBINATION METER

    OK

  2. INSPECT NO. 2 TRANSFER INDICATOR SWITCH (TRANSFER NEUTRAL POSITION SWITCH)


    1. A01E01JE15

      Remove the transfer indicator switch.

    2. 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. 2 TRANSFER INDICATOR SWITCH (TRANSFER NEUTRAL POSITION SWITCH)

    OK

  3. INSPECT COMBINATION METER


    1. Check the A/T P indicator light.


      1. Disconnect the T5 switch connector.

      2. Turn the ignition switch ON.

      3. Connect the T5-1 terminal of the wire harness side connector to the body ground, and then check the A/T P indicator light.

        OK
        A/T P indicator light illuminates.

    NG

    REPLACE COMBINATION METER

    OK

    REPAIR OR REPLACE HARNESS AND CONNECTOR