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Loss Of Generic Electronic Module (Gem) Functions

  1. Inspect fuse 19 (10 Amp). Check for loose or damaged connectors or wires. If a problem is found, service as necessary. If okay, go to next step.
  2. Connect New Generator Star (NGS) tester to Data Link Connector (DLC), and retrieve continuous DTC's. Perform On Demand self test. If DTC B1317 is present, repair charging system for over-voltage condition. If DTC B1317 is not retrieved, go to next step.
  3. Inspect GEM connector J1 pin 13 (Black/Light Green wire) for terminal looseness or damage. See Figure . Repair as necessary. If okay, go to next step.
  4. Disconnect battery negative terminal. Check for continuity on Black/Light Green wire between fuse 19 and GEM 26-pin connector terminal 13. See Figure . If there is no continuity, repair open in Black/Light Green wire. If continuity is present, go to next step.
  5. Check GEM ground connection behind right side of instrument panel. If connection is okay, repair open in ground circuits (Black/White wire) between GEM and ground point behind right side of instrument panel. Grounds at GEM are located in 26-pin connector terminals 25 and 26, and 22-pin connector terminal 15. See Figure .
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