Dtc P0818 Driveline Disconnect Switch Input Circuit


DESCRIPTION

MONITOR DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

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

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

INSPECT COMBINATION METER ASSEMBLY

DTC 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 No.
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):
  1. Vehicle speed is 25 km/h (16 mph) or more
  2. Transfer shift lever is on H
  1. Short in transfer neutral position switch circuit
  2. Transfer neutral position switch
  3. 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:
  1. Transfer neutral position switch indicates that the transfer shift lever is in neutral.
  2. Transfer shift lever is in the H position.
  3. The vehicle is traveling at 25 km/h (16 mph) or more.
  4. The transfer neutral position switch has been ON for more than 30 seconds.
Then the ECM will illuminate the MIL and store the DTC.

WIRING DIAGRAM


Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.A750F Automatic Transmission.Automatic Transmission System. Dtc P0818 Driveline Disconnect Switch Input Circuit


INSPECTION PROCEDURE

1.CHECK WIRE HARNESS (NO. 2 TRANSFER INDICATOR SWITCH - BODY GROUND)
Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.A750F Automatic Transmission.Automatic Transmission System. Dtc P0818 Driveline Disconnect Switch Input Circuit

  1. Disconnect the T6 switch connector.

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

    Standard resistance:
    Transfer Connection
    		Specified Condition
    T6-2 - Body ground
    		Below 1 Ω


NG
REPLACE COMBINATION METER ASSEMBLY
OK


2.INSPECT NO. 2 TRANSFER INDICATOR SWITCH (TRANSFER NEUTRAL POSITION SWITCH)
Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.A750F Automatic Transmission.Automatic Transmission System. Dtc P0818 Driveline Disconnect Switch Input 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. 2 TRANSFER INDICATOR SWITCH (TRANSFER NEUTRAL POSITION SWITCH)
OK


3.INSPECT COMBINATION METER ASSEMBLY

  1. Check the A/T P indicator light.

    1. Disconnect the T6 switch connector.

    2. Turn the ignition switch ON.

    3. Connect the T6-1 terminal of the wire harness side connector to the body ground, and then check that the A/T P indicator light illuminates.

      OK:
      A/T P indicator light illuminates.


NG
REPLACE COMBINATION METER ASSEMBLY
OK

REPAIR OR REPLACE HARNESS AND CONNECTOR