Abs Repair Precautions

Observe the following precautions when performing repairs:

Disconnect battery or electronic components with ignition switch in ON position.
Disconnect ECU connector when arc welding on vehicle.
NEVER subject ECU to temperatures greater than 180°F (82°C).
DO NOT Disconnect battery before charging with fast charger. DO NOT use fast charger to start engine.

NOTE: Test all ABS components and wiring before replacing ECU.

To prepare for testing, turn ignition switch to OFF position. Remove cover from hydraulic modulator. Remove ECU connector by depressing lock spring and swinging out connector. Leave ECU connector unplugged, unless stated otherwise in testing procedure. Consult wiring diagram while performing tests. See WIRING DIAGRAMS in this article. Check ECU connector terminals only through slots in side of connector. DO NOT use more force than necessary. Connector terminal numbers are molded into side of connector. To reduce diagnostic time, test components in the following order.