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.