Troubleshooting Hints

1. Check the PARK I/P Fuse for an open. If the fuse is blown check CKT 1340 for a short to ground.
2. Check the PWR LOCK Fuse for an open. If the fuse is blown check CKT 1540 for a short to ground.
3. Check the IGN 1 Fuse for an open. If the fuse is blown check CKT 39 for a short to ground.
4. Check the MALL/RADIO/Data Link Connector (DIC) Fuse for an open. If the fuse is blown check CKT 43 for a short to ground.
5. Check the BCM PRGRM Fuse for an open. If the fuse is blown check CKT 1445 for a short to ground.
6. Check the CTSY LAMP Fuse for an open. If the fuse is blown check CKT 240 for a short to ground.
7. Check the RADIO Fuse for an open. If the fuse is blown check CKT 640 for a short to ground.
8. Make sure that G200 is clean and tight.
9. If the modes are not functioning properly refer to the appropriate procedures.
10. If a low battery condition exists you will lose all function of the Body Module Control (BCM) features and you will not be able to enter diagnostics.
11. If you are in the diagnostic mode you can check the function of the features connected to the BCM. Refer to Circuit Operation: Diagnostics (Input/Output Diagnostics).
12. Always check terminal contact before replacing any component.
^ Check for a broken (or partially broken) wire inside of the insulation which could cause system malfunction but prove "GOOD" in a continuity/voltage check with a system disconnected. These circuits may be intermittent or resistive when loaded, and if possible, should be checked by monitoring for a voltage drop with the system operational (under load).
^ Check for proper installation of aftermarket electronic equipment which may affect the integrity of other systems. Refer to General Troubleshooting Procedure. Diagnostic Aids
^ Refer to System Diagnosis.