System Tests: Notes
NOTE:
Tests included in this article are written specifically for New Generation Star (NGS) tester functionality. 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:
Always check module power and ground circuits prior to replacing a control module. See DATA LINK CONNECTORS, GROUND DISTRIBUTION and/or POWER DISTRIBUTION articles in WIRING DIAGRAMS.
SYMPTOM INDEX
| Condition | Go To Test | ||
|---|---|---|---|
| 4-Wheel Anti-Lock Brake System (4WABS) Control Module Does Not Respond To Scan Tool | A | ||
| Electronic Crash Sensor (ECS) Module Does Not Respond To Scan Tool (1) | B | ||
| Powertrain Control Module (PCM) Does Not Respond To Scan Tool | C | ||
| Auxiliary Powertrain Control Module (APCM) Does Not Respond To Scan Tool | D | ||
| Natural Gas Vehicle Module (NGVM) Does Not Respond To Scan Tool | E | ||
| No Module/Network Communications - ISO 9141 Network | F | ||
| No Module/Network Communications - SCP Network | G | ||
| No Module/Network Communication | H | ||
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