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Home >> Geo >> 1992 >> Tracker Base, RWD >> Repair and Diagnosis >> Brakes >> Traction Control >> Anti-Lock Brake System >> Diagnosis >> RWAL Trouble Codes >> Code 2, Open Isolation Solenoid Circuit

Code 2, Open Isolation Solenoid Circuit

  1. Turn ignition off. Disconnect RWAL EBCM connector. Measure resistance between EBCM harness connector terminal No. 1 and ground. See Fig 1 .
  2. If resistance reading is 3-6 ohms, check RWAL EBCM connections. If connections are okay, replace RWAL EBCM.
  3. If resistance reading is greater than 6 ohms, disconnect pressure limit valve connector. Measure resistance between limit valve isolation solenoid terminal No. 1 and ground terminal No. 4. See Fig 2 .
  4. If resistance is now 3-6 ohms, repair open in harness Green or Black wire. If resistance is greater than 6 ohms, isolation solenoid winding is open. Replace pressure limit valve.
Fig 1: RWAL EBCM, Pressure Limit Valve & Power Relay Terminal ID
G92G01432Courtesy of GENERAL MOTORS CORP.
Fig 2: Identifying Pressure Limit Valve & Related Terminals
G93G01248Courtesy of GENERAL MOTORS CORP.
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