Vehicle Set Up

Perform the following vehicle set-up prior to running any New Generation STAR tests:
- Ignition switch in RUN
- Vehicle Transmission Range (TR) position in P (PARK)
- Driver seat not occupied
- Parking brake must be applied
- All passenger compartment, hood and luggage compartment doors closed
- All switches in the nominal OFF position. Do not touch any handle, control or switch that may produce a module input unless instructed to do so by New Generation STAR program.

1. Hookup New Generation STAR Tester and perform Vehicle Selection.

2. Perform Data Link Diagnostics Test to check the Multiplex Communication Network (MCN).

If the MCN Data Link Diagnostics Test passed and concern(s) still remains, then go to Step 3, if data link diagnostic test did not pass go to Diagnostic Trouble Code Chart.

3. Retrieve continuous DTCs from selected module. Use diagnostic procedure outlined under New Generation STAR Tester Operation, Retrieve/Clear Continuous DTCs.

4. Record all continuous DTCs, then clear all DTCs from the selected module using the appropriate diagnostic procedures.

5. Perform On-Demand Self-Test on the selected module.

NOTE: The Self-Test program for an individual module may produce observable outputs.

6. Record all On-Demand Self-Test DTCs and go to Diagnostic Trouble Code Chart to continue diagnosis. If On-Demand Self-Test passed and concern(s) still remains, then go to Step 7.

7. Use the continuous DTCs recorded in Step 4 and go to Diagnostic Trouble Code Chart to continue diagnosis. If no continuous DTCs retrieved in Step 4, then concern(s) is not related to Multiplex Communication Network.