Component Tests

NOTE:

If ADD fails to shift correctly, test ADD components for proper operation. If components are okay, check wiring circuit. See WIRING DIAGRAMS .

AUTOMATIC DISCONNECT DIFFERENTIAL ACTUATOR

2001 DRIVE AXLES Differential - Automatic Disconnecting Differential - Front

1. Disconnect actuator connector. Measure resistance between terminal Nos. 2 and 6. See Fig. 5 . Resistance should be 0.3-100 ohms. Measure resistance between terminal Nos. 2 and 6 and body ground. Resistance should be more than 0.5 ohms. If resistance value is not as specified, replace actuator assembly.

2. Apply positive battery voltage to actuator terminal No. 2 and negative battery voltage to actuator terminal No. 6. See Fig. 5 . Listen for actuator engagement operation. Using an ohmmeter, check for continuity between actuator terminal Nos. 3 and 4. If there is no continuity, replace actuator.

3. Apply positive battery voltage to actuator terminal No. 6 and negative battery voltage to actuator terminal No. 2. Listen for actuator disengagement operation. Using an ohmmeter, check that there is no continuity between actuator terminals No. 3 and 4. If there is continuity, replace actuator.

Toyota Echo Battery
Fig. 5: Identifying ADD Actuator Connector Terminals Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
DIY Battery Repair

DIY Battery Repair

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