Self-Diagnostic System: Cis-E

The CIS-E system is equipped with a self-diagnostic capability for trouble shooting, however, there are 2 methods of retrieving diagnostic information. All vehicles can be tested reading an on/off ratio output as a percentage to identify malfunctioning components or systems. California vehicles can be tested reading stored Diagnostic Trouble Codes (DTC's). Only vehicles built for California have the capability to identify and store a DTC. Federal vehicles can only be diagnosed reading an on/off ratio output as a percentage. On California vehicles, the CIS-E control unit must be switched to output an on/off ratio before diagnosing vehicle using on/off ratio tester.

The CIS-E system can be tested using Pulse Counter (124 589 19 21 00), Contact Box (124 589 00 21 00), 25-Pin Test Cable (124 589 33 63 00), Test Cable (124 589 34 63 00), On/Off Ratio Tester (909 589 00 21 00), DVOM.