Diagnostic Tests

ANTI-LOCK BRAKE SYSTEM (ABS) CIRCUIT INSPECTION

1. Inspect system circuit with connector connected.
(a) Remove the ABS Electronic Control Unit (ECU).

Measure Voltage At Each Terminal And Body Ground With Voltmeter:

(b) Using a voltmeter with high impedance (10 k ohms/Volts minimum), measure the voltage at each terminal and body ground.

ABS Circuit Inspection With Connector Connected:

If the circuit is not as specified, check and repair or replace the trouble part shown in the table.

Disconnect Connectors And Inspect Wire Harness Side Connector:

2. Inspect system circuit with connector disconnected.
(a) Disconnect the connectors from the ECU, inspect the wire harness side connector.

ABS Circuit Inspection With Connectors Disconnected:

If the circuit is not as specified, check and repair or replace the trouble part shown in the table.
(b) Connect the connectors, and install the ECU in place.