Instrument Panel Cluster Diagnostic System Check
- Connect scan tool to Data Link Connector (DLC). DLC is located under left side of instrument panel. If scan tool powers up, go to next step. If scan tool does not power up, go to SCAN TOOL DOES NOT POWER UP under SELF-DIAGNOSTIC SYSTEM in BODY CONTROL MODULES - CATERA article.
- Turn ignition switch to RUN position. Using scan tool, attempt to establish communication with Instrument Panel Cluster (IPC). If scan tool communicates with IPC, go to next step. If scan tool does not communicate with IPC, go to SCAN TOOL DOES NOT COMMUNICATE WITH KEYWORD DATA LINE under SYSTEM TESTS in BODY CONTROL MODULES - CATERA article.
- Turn ignition switch to RUN position. Using scan tool, attempt to establish communication with Engine Control Module (ECM). If scan tool communicates with ECM, go to next step. If scan tool does not communicate with ECM, go to SCAN TOOL DOES NOT COMMUNICATE WITH KEYWORD DATA LINE under SYSTEM TESTS in BODY CONTROL MODULES - CATERA article.
- Using scan tool, select DISPLAY DTCs function and retrieve any ECM or IPC DTCs. If scan tool displays any DTCs, go to next step. If scan tool does not display any DTCs, diagnose system by symptom. See SYMPTOM INDEX under SYSTEM TESTS.
- If scan tool displays any DTCs which begin with "U", perform appropriate test. See SCAN TOOL DOES NOT COMMUNICATE WITH CLASS 2 DEVICE in BODY CONTROL MODULES under SYSTEM TESTS - CATERA article. If scan tool displays any other DTCs, perform appropriate test. See DIAGNOSTIC TROUBLE CODE DEFINITIONS .