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System Testing: Notes

NOTE: See SYSTEM TEST DIRECTORY table to determine testing according to symptom.
SYSTEM TEST DIRECTORY

Symptom System Test
No Communication With PATS Module A 
THEFT Indicator Never/Always Illuminates Or THEFT Indicator Does Not Proveout B 
Vehicle Does Not Start (1)
Vehicle Starts Although THEFT Indicator Flashes Fault Code With Key In RUN (2)
(1) Using NGS tester, perform PATS On-Demand Self-Test. Retrieve DTCs. If DTCs are present, perform appropriate DTC test. See PATS MODULE DTC INDEX  under DIAGNOSTIC TROUBLE CODE TESTS. If no DTCs are retrieved, system is operating properly.
(2) Perform DTC U1147: FAULTY SCP LINK OR INCORRECT PCM CALIBRATION  under DIAGNOSTIC TROUBLE CODE TESTS.