Front Control Module (FCM)

TRANSFER CASE VERIFICATION TEST

WARNING: On vehicles equipped with the high voltage system, you must thoroughly read and follow all High Voltage Safety procedures. In addition, before performing any diagnostic or service procedure near a high voltage component, you must perform the High Voltage Power Down. Failure to follow these instructions may result in possible serious or fatal injury

1. Disconnect all jumper wires and reconnect all previously disconnected components and connectors.
2. With the scan tool, select clear Stored DTCs.
3. Make sure that all accessories are turned off and that the battery is fully charged.
4. Test drive the vehicle in each Transfer Case range and verify proper operation in each range.
- To select or deselect 2WD, AWD or 4HI mode, the vehicle speed must be below 88 Kmh (55 mph) with all wheels at vehicle speed.
- Shifts will not take place with a wheel speed difference of greater than 21 Kmh (13 mph) between the front and rear wheels.
- To select or deselect 4LO (if equipped), the vehicle speed must be below 5 Kmh (3 mph) with the ignition ON and the transmission in neutral (automatic trans) or the clutch pedal pressed (manual trans).
- To select or deselect Transfer Case Neutral, vehicle speed must be 0 Kmh (0 mph) with the ignition ON, engine OFF, the brake pedal applied, and the transmission in neutral (automatic trans) or the clutch pedal pressed (manual trans). Press the Neutral button (if equipped) on the Transfer Case Selector Switch until the Neutral Indicator is illuminated.
- WARNING: Apply the parking brake. The vehicle may roll with the Transfer Case in neutral.

- To verify that the Transfer Case is in Neutral, shift the automatic transmission into reverse and release the brake pedal for three seconds or shift the manual transmission into gear and slowly release the clutch pedal. There should be no vehicle movement if the Transfer Case is in Neutral.

5. With the scan tool, read DTCs in the Front Control Module (FCM) and in the Instrument Cluster.

Are there any DTCs present in the Front Control Module (FCM) or in the Instrument Cluster?

Yes

- Perform the appropriate diagnostic procedure Testing and Inspection or Testing and Inspection.

No

- Repair is complete.