Test Notes

73 Digital Multimeter Or Equivalent:

New Generation STAR (NGS) Tester Or Equivalent:

Special Tool(s)

CAUTION
- Disconnect the battery before removing and installing the Generic Electronic Module (GEM) or its connectors. Failure to do so will result in the GEM storing many erroneous Diagnostic Trouble Codes (DTCs) and exhibiting erratic operation after installation.
- Be careful when probing the fuse junction panel, power distribution box, or any connectors. Damage will result to the connector receptacle if the probe or terminal being used is too large.

NOTE
- If continuous DTCs are recorded and the symptom is not present when performing the pinpoint tests, an intermittent concern may be the cause. Always check for loose connections and corroded terminals.
- Complete the entire pinpoint test related to the symptom before replacing the GEM.