Readiness Code: Description

Readiness code must be generated when Engine Control Module (ECM) if ECM memory is cleared, battery voltage is disconnected or ECM is disconnected. Readiness code appears as an 8-digit display in measuring value block 086, display field 1 of scan tool. Each of the 8 digits is related to a specific exhaust related system. During a test sequence OBD system checks function of each of the 8 systems. Test sequence once started must be run completely. During test sequence if test is successful scan tool changes display digits from "1" to "0". When readiness code is generated, display should read "0 0 0 0 0 0 0 0" in measuring value block 086, display field 1. If during testing a malfunction is recognized, a DTC is stored in memory. Retrieve DTC and repair as necessary. See RETRIEVING DIAGNOSTIC TROUBLE CODES .