Test A: Scan Tool Does Not Power Up
WARNING: This page is about a different car, the 2002 Pontiac Sunfire, 2002 Chevrolet Cavalier, 2001 Pontiac Sunfire, and 2001 Chevrolet Cavalier. However, it is still accessible from the selected car via links, so may be relevant.
- Check for battery positive voltage at Data Link Connector (DLC) terminal No. 16 (Orange wire). See Fig 1 . DLC is located at lower left side of instrument panel, near steering column. If battery voltage exists, go to next step. If battery voltage does not exist, repair open or short to ground in Orange wire between DLC and CIG fuse (20-amp) located in instrument panel fuse block. See Figure . After repairs, go to appropriate diagnostic system check. See BODY CONTROL SYSTEM DIAGNOSTIC SYSTEM CHECK under SELF-DIAGNOSTIC SYSTEM.
- Check for open in Black wire between DLC terminal No. 4 and ground point G204. See Fig 1 . If ground circuit is okay, go to next step. If ground circuit is open, repair open in Black wire between DLC and ground point G204. See Figure . After repairs, go to appropriate diagnostic system check. See BODY CONTROL SYSTEM DIAGNOSTIC SYSTEM CHECK under SELF-DIAGNOSTIC SYSTEM.
- Check for poor connections between scan tool and DLC terminals No. 4 (Black wire) and No. 16 (Orange wire). See Fig 1 . If no problems are found, go to next step. If problem is found, repair as necessary. After repairs, go to appropriate diagnostic system check. See BODY CONTROL SYSTEM DIAGNOSTIC SYSTEM CHECK under SELF-DIAGNOSTIC SYSTEM.
- Scan tool may be malfunctioning. Check scan tool manual for diagnostic procedures. After repairs, go to appropriate diagnostic system check. See BODY CONTROL SYSTEM DIAGNOSTIC SYSTEM CHECK under SELF-DIAGNOSTIC SYSTEM.
NOTE:
Perform test procedures while wiggling related wiring and connectors. This can often cause malfunction to appear.