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DTC C0635 Orc0640: Normal Force Circuit Malfunction (2000 Models)

  1. Perform diagnostic system check. See DIAGNOSTIC SYSTEM CHECK  . After performing diagnostic system check, go to next step.
  2. Turn ignition switch off. Disconnect control module harness connector. Turn ignition switch on. Using a DVOM, measure voltage between ground and normal force circuit (White or Gray wire). See WIRING DIAGRAMS  . If voltage is more than 10 volts, go to step  6 . If voltage is less than 10 volts, go to next step.
  3. Check normal force circuit for high resistance, a short to ground, or an open. If condition was found and repaired, go to step  8 . If condition was not found, go to next step.
  4. Check Electronic Brake Control Module (EBCM) harness connector for a poor connection. If a poor connection was found and repaired, go to step  8 . If a poor connection was not found, go to next step.
  5. Replace EBCM. See appropriate ANTI-LOCK article. If replacement is complete, go to step  8 .
  6. Check suspension control module harness connector for a poor connection. If a poor connection was found and repaired, go to step  8 . If a poor connection was not found, go to next step.
  7. Replace suspension control module. See ESC/CVRSS CONTROL MODULE  under REMOVAL & INSTALLATION. Calibrate NEW control module. See CALIBRATING ESC/CVRSS CONTROL MODULE  under ADJUSTMENTS. If replacement is complete, go to next step.
  8. Using scan tool, clear DTCs. Operate vehicle under normal driving conditions. If DTC resets, go to step  2 . If DTC does not reset, system is okay.
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