Up to 08/2009

MF1A TRANSFER / 4WD / AWD: ACTIVE TORQUE CONTROL 4WD SYSTEM: C1298: Linear Solenoid Circuit
C1298 - 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

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

HINT
Check the condition of each related circuit connector before troubleshooting Electronic Circuit Inspection Procedure.

PROCEDURE

1. CHECK WIRE HARNESS (4WD ECU - BATTERY)

(a) Disconnect the ECU connector.





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

Standard Voltage:





Text in Illustration





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

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

(a) Remove the coupling connector.





(b) Measure the resistance of the solenoid.

Standard Resistance:





Text in Illustration





NG -- REPLACE ELECTRO MAGNETIC CONTROL COUPLING SUB-ASSEMBLY Removal
OK -- Continue to next step.

3. 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:





Text in Illustration





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE 4WD ECU ASSEMBLY