Retrieving Codes

NOTE: Data Link Connector (DLC) was previously referred to as Self-Test connector or VIP connector.

Service codes are retrieved from EEC-IV system through Data Link Connector (DLC). Various methods and test equipment may be used to access these codes:

Analog Volt-Ohmmeter (VOM)
Scan Tool
In-Dash Malfunction Indicator Light (MIL) Or CHECK ENGINE light
STAR Series Tester

NOTE: For engine-related DTCs, see appropriate TESTS W/CODES article in the ENGINE PERFORMANCE section.

These DTCs pertain to engine performance and must be repaired first, as engine performance and related component signals will affect transmission operation and diagnosis. For information and testing procedures of engine-related DTCs and components, see TESTS W/CODES - EEC-IV article in the ENGINE PERFORMANCE section.