System Tests: Notes

WARNING: This page is about a different car, the 2002 Ford Focus. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Tests included in this article are written specifically for Worldwide Diagnostic System (WDS) or New Generation Star (NGS) tester. Other OBD II-compatible scan tools may be used, but may not be equipped with equal test function capabilities. Refer to scan tool manufacturer's instructions.

NOTE: Before performing any system tests, inspect DLC for loose, damaged or corroded terminals. Pay particular attention to terminals No. 2 (Gray/Red wire), No. 7 (White/Black wire) and No. 10 (Blue/Red wire). Always check module power and ground circuits prior to replacing a control module. See COMPUTER DATA LINES, GROUND DISTRIBUTION or POWER DISTRIBUTION in SYSTEM WIRING DIAGRAMS article in ELECTRICAL.

SYMPTOM INDEX

Symptom	Perform Test
Anti-Lock Brake System Module Does Not Respond To Scan Tool	A
Powertrain Control Module Does Not Respond To Scan Tool - Except Zetec Engine	B
Instrument Cluster Does Not Respond To Scan Tool	C
Generic Electronic Module Does Not Respond To Scan Tool	D
Restraint Control Module Does Not Respond To Scan Tool	E
Auxiliary Instrument Cluster Does Not Respond To Scan Tool	F
No Module/Network Communication - ISO 9141 Network	G
No Module/Network Communication - SCP Network	H
No Module/Network Communication - All Modules	I