System Tests: Notes

CAUTION: When battery is disconnected or modules are replaced, vehicle computer and memory systems may lose memory data. Driveability problems may exist until computer systems have completed a relearn cycle. See COMPUTER RELEARN PROCEDURES article in GENERAL INFORMATION before disconnecting battery.

NOTE: Always check module power and ground circuits prior to replacing any control module. See DATA LINK CONNECTORS, GROUND DISTRIBUTION and/or POWER DISTRIBUTION article in WIRING DIAGRAMS.

NOTE: Test procedures are written specifically for New Generation Star (NGS) tester. Generic scan tools may not have the capability of performing all the same functions. Refer to scan tool manufacturer's instructions.

SYMPTOM INDEX

Symptom

Perform Test

Anti-Lock Brake System Module Does Not Respond To NGS Tester ⁽¹⁾

Front Electronic Module Does Not Respond To NGS Tester

Restraint Control Module Does Not Respond To NGS Tester

Instrument Cluster Does Not Respond To NGS Tester ⁽²⁾

Powertrain Control Module Does Not Respond To NGS Tester ⁽³⁾

Dual Automatic Temperature Control Module Does Not Respond To NGS Tester ⁽⁴⁾

Audio Control Module Does Not Respond To NGS Tester ⁽⁵⁾

Steering Column Lock Module Does Not Respond To NGS Tester (M/T Only) ⁽⁶⁾⁽⁷⁾

Remote Emergency Satellite Cellular Unit Module Does Not Respond To NGS Tester ⁽⁸⁾

Driver's Seat Module Does Not Respond To NGS Tester ⁽⁹⁾

Driver's Door Module Does Not Respond To NGS Tester

Rear Electronic Module Does Not Respond To NGS Tester

No Module/Network Communication - ISO 9141 Network

No Module/Network Communication - SCP Bus Link

No Module/Network Communication - No Power To NGS Tester

⁽¹⁾	Anti-lock brake system control module is referred to as a stability assist module if vehicle is equipped with traction control and stability assist.

⁽²⁾	Message center module is an integral part of the instrument cluster.

⁽³⁾	Next generation speed control servo is an integral part of the powertrain control module.

⁽⁴⁾	Dual automatic temperature control module may also be referred to as dual electronic automatic temperature control module or electronic automatic temperature control module.

⁽⁵⁾	Audio control module may also be referred to as audio unit.

⁽⁶⁾	Steering column lock module may also be referred to as a steering column lock unit or steering column lock.

⁽⁷⁾	Steering Column Lock Module (SCLM) will fail data link diagnostic test if vehicle is not equipped with this module. Vehicles with a manual transmission are equipped with a SCLM.

⁽⁸⁾	Remote Emergency Satellite Cellular Unit (RESCU) module will fail data link diagnostic test if vehicle is not equipped with this module. Vehicles with voice activated cellular phone are equipped with a RESCU module.

⁽⁹⁾	Driver's Seat Module (DSM) will fail data link diagnostic test if vehicle is not equipped with this module. Vehicles with memory seats are equipped with a DSM.