C1298

MF1A TRANSFER / 4WD / AWD: 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 pressure to distribute torque according to the driving conditions.





WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. INSPECT FUSE (4WD FUSE)

(a) Remove the 4WD fuse from the instrument junction block.

(b) Measure the resistance of the fuse.

Standard Resistance:





HINT
Check for short circuits in all harnesses and connector connected to the 4WD fuse Service Precautions.

NG -- REPLACE FUSE (4WD)
OK -- Continue to next step.

2. CHECK WIRE HARNESS (4WD CONTROL ECU - BATTERY)

(a) Disconnect the ECU connector.





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

Standard Voltage:





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

3. INSPECT ELECTROMAGNETIC CONTROL COUPLING (4WD LINEAR SOLENOID)

(a) Remove the coupling connector.





(b) Measure the resistance of the solenoid.

Standard Resistance:





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

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

(a) Disconnect the ECU connector.





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

Standard Resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE 4WD CONTROL ECU Removal