Test Ml: Step 25

25) Continuous Memory Code 70, 71 and 72: CHECK ENGINE or CHECK DCL Message Displayed  Codes 70, 71 and 72 indicate a circuit failure has occurred on the Data Communications Link (DCL). These codes can occur alone or in conjunction with another code. CHECK ENGINE or CHECK DCL message will be displayed when:

• Code 70 indicates ECA is unable to transmit data
• Code 71 indicates Cluster Control Assembly (CCA) is unable to transmit data
• Code 72 indicates that Message Center Control Assembly (MCCA) is unable to transmit data

If vehicle is a NO START, go to TEST A, step 1). Perform KOEO Self-Test, if the result is a Pass Code (11-10-11), repair fault in electronic message center Data Communications Link (DCL). If Pass Code is not displayed, service codes as described in Self-Test procedures.