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Engine Electrical Diagnostic System Check

  1. Perform battery inspection test. See BATTERY TESTING & INSPECTION  under ON-VEHICLE TESTING. If problem exists, repair as necessary. If problem does not exist, go to next step.
  2. Connect scan tool to Data Link Connector (DLC). Turn ignition switch to RUN position. If scan tool powers up, go to next step. If scan tool does not power up, see BODY CONTROL MODULES - CAMARO & FIREBIRD article in ACCESSORIES & EQUIPMENT.
  3. Using scan tool, attempt communication with Instrument Panel Cluster (IPC) and Powertrain Control Module (PCM) on class 2 serial data circuit. If scan tool communicates with both modules, go to next step. If scan tool does not communicate with both modules, repair communications concern. See BODY CONTROL MODULES - CAMARO & FIREBIRD article in ACCESSORIES & EQUIPMENT.
  4. Using scan tool, select DISPLAY DTCs function for each module. Record all displayed DTCs, DTC status, and module which set the DTC. If scan tool displays any DTCs, go to next step. If scan tool does not display any DTCs, repair starter system by symptom. See SYMPTOM INDEX  table under SYSTEM TESTS.
  5. If scan tool displays DTCs which begin with "U", perform appropriate test. See BODY CONTROL MODULES - CAMARO & FIREBIRD article in ACCESSORIES & EQUIPMENT. If scan tool does not display DTCs which begin with "U", go to next step.
  6. If scan tool displays DTC B1000, repair this DTC first. See BODY CONTROL MODULES - CAMARO & FIREBIRD article in ACCESSORIES & EQUIPMENT. If scan tool does not display DTC B1000, perform appropriate test. See DIAGNOSTIC TROUBLE CODE INDEX  table.
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