Test 4A: Excess Decay

WARNING: This page is about a different car, the 1994 Plymouth Sundance, 1994 Plymouth Acclaim, 1994 Dodge Spirit, 1994 Dodge Shadow, and 1994 Chrysler LeBaron. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: For connector terminal identification, refer to CONNECTOR IDENTIFICATION . For wiring diagrams, refer to WIRING DIAGRAMS .

Using DRB, read fault messages. If any Wheel Speed Sensor (WSS) fault messages are displayed, proceed to appropriate test. See FAULT MESSAGES table under TEST 1A. If no WSS fault messages are displayed, use DRB to erase fault messages. Inspect vehicle tires. Replace any excessively worn tires. Perform TEST VER-1A: SYSTEM VERIFICATION TEST . If vehicle tires are not excessively worn, go to next step.
Ensure vehicle brakes are not dragging. If vehicle brakes are dragging, repair brakes as necessary. Perform TEST VER-1A: SYSTEM VERIFICATION TEST . If vehicle brakes are not dragging, go to next step.
Road test vehicle, with an assistant, at 20-30 MPH. Using DRB, have assistant monitor ABS SENSORS wheel speeds. If all 4 wheel speeds are not equal, go to TEST 4B. If all 4 speeds are equal, go to next step.
NOTE: Ensure anti-lock brake stops are performed on clean dry pavement.
Perform several anti-lock brake stops. Using DRB, read fault messages. If DRB displays EXCESS DECAY fault, go to next step. If DRB does not display EXCESS DECAY fault, go to step 6).
Inspect tone wheels for damage (chipping or cracking). If tone wheels are okay, go to TEST 9A. If tone wheels are damaged, replace damaged tone wheels. Perform TEST VER-1A: SYSTEM VERIFICATION TEST .
If any other fault messages are present in step 4), go to TEST 1A. If no fault messages are present, ABS is operating properly. Perform TEST VER-1A: SYSTEM VERIFICATION TEST .