DYNAMIC TORQUE CONTROL AWD SYSTEM, Diagnostic DTC:C1298/98

DTC Code DTC Name
C1298/98 Linear Solenoid Circuit

DESCRIPTION

The 4WD ECU assembly receives signals from each sensor to control clutch fluid pressure for limiting the center differential operation, which distributes torque according to the driving conditions.

DTC No. Detection Item DTC Detection Condition Trouble Area
C1298/98 Linear Solenoid Circuit

When all of the following continue for 1 second or more:


  • IG1 voltage is 9.5 V or more.

  • The current requested by the 4WD linear solenoid (transmission coupling assembly) is either 0 A or greater than 0.8 A.

  • Open or short occurs in the linear solenoid circuit.

  • Wire harness and connector

  • 4WD linear solenoid (Transmission coupling assembly)

  • 4WD ECU assembly

WIRING DIAGRAM

A01HILJE08
*a 4WD Linear Solenoid
*b Transmission Coupling Assembly
*c 4WD ECU Assembly

CAUTION / NOTICE / HINT

Note

When the 4WD ECU assembly is replaced with a normal one from another vehicle, it is necessary to perform calibration.

Click here

Tech Tips

Check the condition of each related circuit connector before troubleshooting.

Click here

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (4WD ECU ASSEMBLY - TRANSMISSION COUPLING ASSEMBLY)


    1. A01HFQHC51
      *a

      Front view of wire harness connector

      (to 4WD ECU Assembly)

      Disconnect the I55 4WD ECU assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      I55-2 (SLC+) - I55-1 (SLC-) 20°C (68°F) 2.2 to 2.6 Ω
      I55-2 (SLC+) - Body ground Always 10 kΩ or higher
      I55-1 (SLC-) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE 4WD ECU ASSEMBLY for LHD: Click here
    REPLACE 4WD ECU ASSEMBLY for RHD: Click here

    NG

  2. INSPECT TRANSMISSION COUPLING ASSEMBLY


    1. A01HEVHC01
      *a

      Component without harness connected

      (4WD Linear Solenoid (Transmission Coupling Assembly))

      Disconnect the S1 4WD linear solenoid (transmission coupling assembly) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      1 (BSF) - 2 (SLC) 20°C (68°F) 2.2 to 2.6 Ω
      1 (BSF) - Body ground Always 10 kΩ or higher
      2 (SLC) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    NG

    REPLACE TRANSMISSION COUPLING ASSEMBLY Click here