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Home >> Dodge and Ram >> 2003 >> Durango Base, 5.9 Z, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 106 (Chassis Diagnostic Procedures - Anti-Lock Brake System) >> System Description And Functional Operation >> Abs >> Self-Test At Ignition Turn On >> Valve, Power Relay, And Pump Motor Test

Valve, Power Relay, And Pump Motor Test

WARNING: This page is about a different car, the 2004 Dodge Dakota. However, it is still accessible from the selected car via links, so may be relevant.

After completion of the bulb check, an active test of the power relay and the solenoid valve coils occur. Tests are made for shorted relay contacts, open relay, and shorted isolation and dump valve solenoids (open valves take somewhat longer to diagnose; open valve checks are made during normal operation while not in antilock mode). The pump motor works on Pulse Width Modulation (PWM). During self-test mode and during antilock state, you will not be able to hear the pump motor operation.  The pump motor self-test will happen when vehicle speed is over 15 MPH.

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