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. The signals are used to control the clutch fluid pressure to vary the distribution of torque in accordance with 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:


  • The voltage at terminal IG1 is 9.5 V or more.

  • The target current for the 4WD linear solenoid (electro magnetic control coupling sub-assembly) is either 0 A or 0.8 A or more.

  • An open or short is detected in the linear solenoid circuit.

  • Wire harness and connector

  • 4WD linear solenoid (Electro magnetic control coupling sub-assembly)

  • 4WD ECU assembly

WIRING DIAGRAM

B005PU5E03
*a 4WD Linear Solenoid (Electro Magnetic Control Coupling Sub-assembly)
*b 4WD ECU Assembly

CAUTION / NOTICE / HINT

Note

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

Click here

Tech Tips

Check the condition of each related circuit connector before troubleshooting.

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PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (4WD ECU ASSEMBLY - ELECTRO MAGNETIC CONTROL COUPLING SUB-ASSEMBLY)


    1. Disconnect the R10 4WD ECU assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      R10-2 (SLC+) - R10-1 (SLC-) 20°C (68°F) 1.75 to 2.15 Ω
      R10-2 (SLC+) - Body ground Always 10 kΩ or higher
      R10-1 (SLC-) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE 4WD ECU ASSEMBLY Click here

    NG

  2. INSPECT ELECTRO MAGNETIC CONTROL COUPLING SUB-ASSEMBLY


    1. B005Q3MC01
      *a

      Component without harness connected

      (4WD Linear Solenoid (Electro Magnetic Control Coupling Sub-assembly))

      Disconnect the T4 4WD linear solenoid (electro magnetic control coupling sub-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) 1.75 to 2.15 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 ELECTRO MAGNETIC CONTROL COUPLING SUB-ASSEMBLY Click here