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Home >> Jeep >> 1996 >> Grand Cherokee Limited, 5.2 Y >> Repair and Diagnosis >> External Pages >> Different car >> Section 36 (Anti-Lock Brake System) >> Self-Diagnostic Tests >> Test 5A - Hydraulic Failure

Test 5A - Hydraulic Failure

WARNING: This page is about a different car, the 1994 Eagle Vision, 1994 Dodge Intrepid, 1994 Chrysler New Yorker, 1994 Chrysler LHS, and 1994 Chrysler Concorde. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: For connector terminal identification, see CONNECTOR IDENTIFICATION. For wiring diagram, see WIRING DIAGRAM.
  1. Using DRB, monitor PEDAL TR sensor input. Depress brake pedal slowly to floor. If pedal travel input on DRB display does not change smoothly from 1-6 steps, go to TEST 15A. If pedal travel input changes smoothly from 1-6 steps, go to next step.
  2. Inspect brake system for broken or damaged brakelines. If brakelines are broken or damaged, repair as necessary. Perform TEST VER-1A. If brakelines are okay, go to next step.
  3. Using DRB, read fault messages. If PUMP MOTOR CIRCUIT NOT WORKING PROPERLY message is set, go to TEST 17A. If PUMP MOTOR CIRCUIT NOT WORKING PROPERLY message is not set, go to next step.
  4. Depress and hold down brake pedal. Using DRB, actuate HYDRAULIC VALVE TEST. Observe test results. Brake pedal should drop slightly 4 times followed by one push-back. Release brake pedal. If brake pedal dropped to floor during any part of test, go to TEST 5B. If brake pedal did not drop to floor, go to next step.
  5. If brake pedal did not drop slightly 4 times during test, go to TEST 5B. If brake pedal dropped slightly 4 times during test but did not push back at end of test, replace pump/motor assembly. Perform TEST VER-1A. If brake pedal dropped slightly 4 times during test and pushed back at end of test, replace CAB. Perform TEST VER-1A. If CAB has been replaced for this fault before, replace HCU.
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