Inspection Procedure

WARNING: This page is about a different car, the 2007 Toyota RAV4. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT ELECTROMAGNETIC COUPLING (4WD LINEAR SOLENOID)

Remove the coupling connector.

Measure the resistance of the solenoid.

Standard resistance

TESTER CONNECTION AND SPECIFIED CONDITION

Tester Connection	Specified Condition
1 (BSF) - 2 (SLC)	2.2 to 2.6 Ω
1 (BSF) - Body ground	10 kΩ or higher
2 (SLC) - Body ground	10 kΩ or higher

Fig 1: Identifying Coupling Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE ELECTROMAGNETIC COUPLING

OK: GO TO NEXT STEP.

CHECK WIRE HARNESS (COUPLING - 4WD CONTROL ECU)

Disconnect the E57 ECU connector.

Measure the resistance of the wire harness side connector.

Standard resistance

TESTER CONNECTION AND SPECIFIED CONDITION

Tester Connection	Specified Condition
E57-13 (SLC+) - Q1-1 (BSF)	Below 1 Ω
E57-32 (SLC-) - Q1-2 (SLC)	Below 1 Ω
E57-13 (SLC+) - Body ground	10 kΩ or higher
E57-32 (SLC-) - Body ground	10 kΩ or higher

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR

Fig 2: Identifying E57 ECU Connector Terminals

OK: REPLACE 4WD CONTROL ECU