System Testing: Notes

WARNING: This page is about a different car, the 1998 Mercury Mountaineer and 1998 Ford Explorer. However, it is still accessible from the selected car via links, so may be relevant.

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

SYSTEM TEST DIRECTORY

Symptom

System Test

No Communication With PATS Module

THEFT Indicator Never/Always Illuminates Or THEFT Indicator Does Not Proveout

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.