EASY AND SMOOTH START SYSTEM, Diagnostic DTC:C1384/113

DTC Code DTC Name
C1384/113 Neutral Switch

DESCRIPTION

The skid control ECU receives a neutral gear position signal from the exhaust brake neutral switch assembly of the transmission.

DTC Code DTC Detection Condition Trouble Area
C1384/113 While accelerating from 5 km/h (3 mph) to 50 km/h (31 mph), neutral switch input does not change for 5 times consecutively.

  • Open or short in wire harness

  • Improperly connected connector or corroded terminal

  • Exhaust brake neutral switch

  • Skid control ECU

WIRING DIAGRAM

A01CGPKE01

INSPECTION PROCEDURE

PROCEDURE


  1. INSPECT EXHAUST BRAKE NEUTRAL SWITCH


    1. A01CGZ6E01
      Text in Illustration
      *1

      Component without harness connected

      (Exhaust Brake Neutral Switch)

      Disconnect the exhaust brake neutral switch connector.

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      1 - 2 Shift lever in N 10 kΩ or higher
      Shift lever not in N Below 1 Ω

    NG

    REPLACE EXHAUST BRAKE NEUTRAL SWITCH

    OK

  2. INSPECT SKID CONTROL ECU (N CIRCUIT)


    1. A01CHL9E01
      Text in Illustration
      *1

      Component with harness connected

      (Skid Control ECU)

      Install the exhaust brake neutral switch connector.

    2. Turn the ignition switch to ON.

    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Condition Specified Condition
      S11-12 (N) - Body ground Shift lever in N 20 to 32 V
      Shift lever not in N Below 3 V

    NG

    CHECK HARNESS AND CONNECTOR (EXHAUST BRAKE NEUTRAL SWITCH - SKID CONTROL ECU) Click here

    OK

  3. RECONFIRM DTC


    1. Clear the DTCs Click here.

    2. Perform a road test.

    3. Check if the same DTC is recorded Click here.

      Result
      Result Proceed to
      DTC (C1384/113) is not output A
      DTC (C1384/113) is output B

      Tech Tips

      If troubleshooting has been carried out according to Problem Symptoms Table, refer back to the table and proceed to the next step Click here.


    B

    REPLACE SKID CONTROL ECU

    A

    CHECK FOR INTERMITTENT PROBLEMS Click here

  4. CHECK HARNESS AND CONNECTOR (EXHAUST BRAKE NEUTRAL SWITCH - SKID CONTROL ECU)


    1. Turn the ignition switch off.

    2. Disconnect the skid control ECU connector and exhaust brake neutral switch connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      S11-12 (N) - N1-1 Always Below 1 Ω
      S11-12 (N) - Body ground Always 10 kΩ or higher
      N1-2 - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE SKID CONTROL ECU