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Abs Warning Light Stays Off

  1. Ensure ignition is off. Remove instrument cluster assembly. Inspect condition of ABS indicator light. Repair as necessary. If light is okay, check voltage at left instrument cluster harness connector.
  2. Turn ignition on. Using voltmeter, measure voltage between ground and instrument cluster harness connector terminal No. 11. See Fig 1 . If battery voltage is not present, inspect and repair circuit as necessary. See WIRING DIAGRAMS  . If battery voltage is present, turn ignition off and install instrument cluster.
  3. Disconnect ABS control unit and hydraulic unit harness connectors. Turn ignition on. Using voltmeter, measure voltage between ground and ABS control unit harness connector terminal No. 29. Also, measure voltage between ground and hydraulic unit harness connector terminal No. 10. See Fig 2 .
  4. If battery voltage is not present, inspect and repair circuit as necessary. See WIRING DIAGRAMS  . If battery voltage is present, turn ignition off. Using ohmmeter, check continuity between ground and ABS control harness connector terminals No. 10, 20 and 34. See Fig 3 . If continuity does not exist, inspect and repair circuit as necessary.
  5. If continuity exists, connect ABS control module harness connector. Check continuity between hydraulic unit harness connector terminal No. 8 and ground. See Fig 2 . If continuity does not exist, inspect and repair circuit as necessary. If continuity exists, remove hydraulic unit valve relay (5-terminal), located on hydraulic unit.
  6. Check continuity of relay. See Fig 4 . With battery voltage connected between terminals No. 85 and 86, continuity should exist between terminals No. 30 and 87. Continuity should not exist between terminals No. 30 and 87a. Without battery voltage, continuity should exist between terminals No. 30 and 87a. Continuity should not exist between terminals No. 30 and 87. If continuity is not as specified, replace relay. If relay is okay, replace ABS control unit and hydraulic unit.
Fig 1: Identifying Instrument Cluster Connector Terminals
G96G20475Courtesy of SUBARU OF AMERICA, INC.
Fig 2: Identifying Hydraulic Unit Harness Connector Terminals
G96H20476Courtesy of SUBARU OF AMERICA, INC.
Fig 3: Identifying ABS Control Unit Harness Connector Terminals
G93F84843Courtesy of SUBARU OF AMERICA, INC.
Fig 4: Checking Hydraulic Unit Solenoid Valve Relay
G91C02689Courtesy of SUBARU OF AMERICA, INC.
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