C1298

DIFFERENTIAL: ACTIVE TORQUE CONTROL 4WD SYSTEM: C1298/98: Linear Solenoid Circuit
C1298/98 - Linear Solenoid Circuit

DESCRIPTION

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





WIRING DIAGRAM





INSPECTION PROCEDURE

NOTICE:
Inspect the fuses for circuits related to this system before performing the following inspection procedure.

PROCEDURE

1. CHECK WIRE HARNESS (4WD CONTROL ECU BSLC TERMINAL)

(a) Disconnect the E57 ECU connector.





(b) Measure the voltage of the wire harness side connector.

Standard voltage





NG -- REPAIR OR REPLACE HARNESS AND CONNECTOR
OK -- Continue to next step.

2. INSPECT ELECTROMAGNETIC COUPLING (4WD LINEAR SOLENOID)

(a) Remove the coupling connector.





(b) Measure the resistance of the solenoid.

Standard resistance:





NG -- REPLACE ELECTROMAGNETIC COUPLING
OK -- Continue to next step.

3. CHECK WIRE HARNESS (COUPLING - 4WD CONTROL ECU)

(a) Disconnect the E57 ECU connector.





(b) Measure the resistance of the wire harness side connector.

Standard resistance:





NG -- REPAIR OR REPLACE HARNESS AND CONNECTOR

OK -- REPLACE 4WD CONTROL ECU