LEMON Manuals: Even more car manuals for everyone
Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 32 (HVAC Systems - Manual) >> Self-Diagnostic System >> Diagnostic System Check

Diagnostic System Check

WARNING: This page is about a different car, the 2002 Pontiac Grand Prix. However, it is still accessible from the selected car via links, so may be relevant.
  1. Did you review the DESCRIPTION & OPERATION  section? If so, go to next step. If not, review DESCRIPTION & OPERATION .
  2. Connect scan tool to data Link Connector (DLC). DLC is located under instrument panel, near steering column. If scan tool powers up, go to next step. If scan tool does not power up, go to appropriate BODY CONTROL MODULES article in ACCESSORIES & EQUIPMENT.
  3. Turn ignition on. Attempt to establish communications with Powertrain Control Module (PCM). If communication is established, go to next step. If communication is not established, go to appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE.
  4. Following scan tool manufacturers instructions, select DISPLAY DTCs function for PCM. If any Diagnostic Trouble Codes (DTCs) are displayed, go to next step. If no DTCs are displayed, perform procedure for appropriate symptom. See SYMPTOM TESTS .
  5. If scan tool displays any DTCs beginning with "U", go to appropriate BODY CONTROL MODULES article in ACCESSORIES & EQUIPMENT. If no DTCs beginning with "U" are displayed, go to next step.
  6. If scan tool displays any DTCs beginning with "P", see DIAGNOSTIC TESTS . If no DTCs beginning with "P" are displayed, go to appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE.
scientia non olet · About LEMON Manuals