Diagnostic Aids

This test is intended to diagnose the following:

• Continuity of data lines between PCM or TCM and scan tool.
• Battery power to scan tool.
• Proper key sequence for output.

1. Check NGS Tester Connections
   
   Turn ignition off. Inspect connection between New Generation Star (NGS) tester and DLC for damaged or corroded pins. Inspect NGS tester cables for damage. Repair/replace if necessary and run tester SYSTEM READINESS TEST to verify communication between tester and module. If cables and connections are okay, go to next step.
2. Check NGS Tester Power Supply
   
   Check fuse No. 6 in instrument panel fuse panel. Check for battery voltage at cigar lighter. Inspect power connection at cigar lighter. Repair as necessary. If power supply and data connections are okay, operator error may be at fault. See COMMUNICATION ERROR  under SELF-DIAGNOSTICS USING SCAN TOOL.