DTC 18: Excessive Isolation Time
- Check for conditions causing extended ABS activation (i.e., locked brakes, erratic wheel speed signal, etc.). Repair as necessary. If no problem is found, go to next step.
- Turn ignition off. Replace EHCU. Reconnect all components. Ensure all component are properly installed. Clear DTCs. See CLEARING DIAGNOSTIC TROUBLE CODES under DIAGNOSIS & TESTING. Verify system operation. See SYSTEM OPERATION CHECK under TROUBLE SHOOTING.