With Scan Tool

If a DRB II Diagnostic Tool is available, plug tool into six way diagnostic connector located at right hand side of steering column, and verify that either a fault (trouble) codes 15, 34 or 77 is indicated. Refer to the appropriate DIAGNOSTIC CHART.

After performing Test NS-6A and NS-6B perform verification test VER-1.

After performing all other diagnostic tests, perform verification test VER-2. R

Refer to SYSTEM SCHEMATICS for speed control system wiring diagram. Follow tool manufacturers instructions for proper installation of the tool prior to testing speed control system.

If no problems were found, replace engine controller.