C2111

C2111-SENSOR SUPPLY 1 VOLTAGE CIRCUIT LOW





For a complete wiring diagram, refer to the Wiring Information Electrical Diagrams.

- When Monitored:
With the ignition on and no system undervoltage or overvoltage condition present.

- Set Condition:
The Final Drive Control Module (FDCM) detects that the Drivetrain Sensor Supply voltage is less than 2.5 volts for 300 milliseconds.





1. DRIVETRAIN 5 VOLT SUPPLY (REFERENCE) VOLTAGE BELOW 4.8 VOLTS
1. Ignition on, engine not running.
2. With the scan tool, read the Drivetrain 5-volt Supply (Reference) Voltage in the FDCM.

Is the voltage below 4.8 volts?

Yes

- Go To 2

No

- Go To 4

2. TRANSFER CASE MOTOR/ENCODER
1. Turn the ignition off to the lock position
2. Disconnect the Transfer Case Motor/Encoder harness connector.
3. Ignition on, engine off.
4. With the scan tool, read the 5-volt Supply (Reference) Voltage.

Is the voltage above 4.75 volts with the Transfer Case Motor harness disconnected?

Yes

- Replace the Transfer Case Encoder/Sensor.
- Perform the TRANSFER CASE VERIFICATION TEST .

No

- Go To 3

3. (K504) DRIVETRAIN 5 VOLT SUPPLY CIRCUIT SHORT TO GROUND




1. Turn the ignition off to the lock position
2. Disconnect the FDCM harness connector.
3. Measure the resistance between ground and the (K504) Drivetrain 5- volt Supply circuit at the Transfer Case Motor harness connector.

Is the resistance below 5.0 Ohms?

Yes

- Repair the short to ground in the (K504) Drivetrain 5 Volt Supply circuit.
- Perform the TRANSFER CASE VERIFICATION TEST .

No

- Replace the Final Drive Control Module (FDCM).
- Perform the TRANSFER CASE VERIFICATION TEST .

4. INTERMITTENT WIRING HARNESS AND CONNECTORS
1. The conditions necessary to set this DTC are not present at this time.
2. Using the wiring diagram/schematic as a guide, inspect the wiring harness and connectors.
3. While monitoring the scan tool data relative to this circuit, wiggle test the wiring harness and connectors.
4. Look for the data to change or for the DTC to reset during the wiggle test.

Were any problems found?

Yes

- Repair as necessary.
- Perform the TRANSFER CASE VERIFICATION TEST .

No

- Test complete.