Drivetrain Control Module (DTCM)

C2111-SENSOR SUPPLY 1 VOLTAGE CIRCUIT LOW







- When Monitored:
Ignition on.

- Set Condition:
The Drive Train Control Module (DTCM) detects that the Drivetrain Sensor Supply voltage is below 2.5 volts for 300 mS.





1. ACTIVE DTC
1. Ignition on, engine not running.
2. With a scan tool, read DTCs.

Is the DTC active at this time?

Yes

- Go To 2

No

- Go To 5

2. 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 DTCM.

Is the voltage below 4.8 volts?

Yes

- Go To 3

No

- Go To 5

3. TRANSFER CASE SHIFT MOTOR/MODE SENSOR ASSEMBLY
1. Turn the ignition off to the lock position
2. Disconnect the Transfer Case Shift Motor/Mode Sensor Assembly harness connector.
3. Ignition on, engine not running.
4. With the scan tool, read the 5-volt Supply (Reference) Voltage.

Is the voltage above 4.75 volts?

Yes

- Replace the Transfer Case Shift Motor/Mode Sensor Assembly.
- Perform the DTCM VERIFICATION TEST. DTCM Verification Test.

No

- Go To 4

4. (K504) DRIVETRAIN 5-VOLT SUPPLY CIRCUIT SHORTED TO GROUND




1. Turn the ignition off to the lock position
2. Disconnect the DTCM C1 harness connector.
3. Measure the resistance between ground and the (K504) Drivetrain 5- volt Supply circuit at the Transfer Case Shift Motor/Mode Sensor Assembly harness connector.

Is the resistance below 5.0 Ohms?

Yes

- Repair the (K504) Drivetrain 5-volt Supply circuit for a short to ground.
- Perform the DTCM VERIFICATION TEST. DTCM Verification Test.

No

- Replace the Drive Train Control Module (DTCM).
- Perform the DTCM VERIFICATION TEST. DTCM Verification Test.

5. INTERMITTENT WIRING AND CONNECTORS
1. The conditions necessary to set this DTC are not present at this time.
2. Using the schematics as a guide, inspect the wiring and connectors specific to this circuit.
3. Wiggle test the wiring harness and connectors while checking for shorted and open circuits.
4. Using the scan tool, monitor the data related to this circuit while performing the wiggle test. Look for the data to change or for the DTC to reset.

Were there any problems found?

Yes

- Repair as necessary.
- Perform the DTCM VERIFICATION TEST. DTCM Verification Test.

No

- Test Complete.