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Code 54: Motor Relay Always On

NOTE: Code 54 may output if hydraulic motor sensor is registering motor revolutions due to noise interference, even though motor relay is off .
  1. Turn ignition switch to ON position. Monitor operation of hydraulic unit motor. Turn ignition off. If motor ceases to operate, replace ABS ECU and retest. If motor continues to operate, remove motor relay and inspect. See HYDRAULIC UNIT RELAYS under COMPONENT TESTING. Replace relay if faulty.
  2. If relay is okay, turn ignition off. Disconnect ABS ECU harness connector. Check continuity between relay receptacle terminal No. 1 and ECU harness connector terminal No. 31. See Figure . If continuity does not exist, inspect and repair circuit as needed. If continuity exists, replace ABS ECU and retest.
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