AUTOMATIC TRANSMISSION SYSTEM, 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

A01DVCAE24

INSPECTION PROCEDURE

PROCEDURE


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


    1. A01DZTBE05

      Disconnect the T5 switch connector.

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

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

    NG

    REPAIR OR REPLACE HARNESS AND CONNECTOR

    OK

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


    1. A01E01JE12

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


    1. A01DZKKE02

      Disconnect the T5 switch connector.

    2. Disconnect the E9 ECM connector.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      E9-23 (TFN) - T5-1 Always Below 1 Ω
      E9-23 (TFN) or T5-1 - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS AND CONNECTOR

    OK

    REPLACE ECM