FREE REPAIR MANUALS & LABOR GUIDES 1982-2013 Vehicles
Courtesy of Operation CHARM: Car repair manuals for everyone.
Home >> Chrysler >> 2012 >> 300 AWD V6-3.6L >> Repair and Diagnosis >> A L L Diagnostic Trouble Codes ( DTC ) >> Testing and Inspection >> C Code Charts >> C147B

C147B





C147B-FRONT AXLE DISCONNECT SENSOR CIRCUIT PERFORMANCE





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

- When Monitored:
Continuously.

- Set Condition:
The Drive Train Control Module (DTCM) detects the Front Axle Lock Control circuit is shorted low.





1. VERIFY THE DTC IS ACTIVE
1. Ignition on, engine not running.
2. With the scan tool, record and erase DTCs.
3. With the scan tool, read DTCs.

Is the DTC active at this time?

Yes

- Go To 2

No

- Go To 11

2. DRIVE TRAIN CONTROL RELAY
1. Turn the ignition off to the lock position.
2. Remove the Drive Train Control Relay.
3. Install a known good relay.
4. Ignition on, engine not running.
5. With the scan tool, erase DTCs.
6. Cycle the ignition.
7. With the scan tool, read DTCs.

Does the DTC remain active?

Yes

- Go To 3

No

- Replace the Drive Train Control Relay.
- Perform the DTCM VERIFICATION TEST. DTCM Verification Test.

3. (F348) DRIVE TRAIN CONTROL RELAY CONTROL CIRCUIT OPEN OR HIGH RESISTANCE




1. Turn the ignition off to the lock position.
2. Remove the FAD Relay.
3. Disconnect the DTCM harness connector.
4. Connect a jumper wire between the (F348) Drive Train Control Relay Control circuit and ground.
5. Ignition on, engine not running.
6. Using a 12-volt test light connected to 12-volts, check the (F348) Drive Train Control Relay Control circuit.

NOTE: The test light must illuminate brightly. Compare the brightness to that of a direct connection to the battery.

Does the test light illuminate brightly?

Yes

- Go To 4

No

- Repair the (F348) Drive Train Control Relay Control circuit for an open or high resistance.
- Perform the DTCM VERIFICATION TEST. DTCM Verification Test.

4. (G303) FRONT AXLE LOCK SIGNAL CIRCUIT SHORT TO VOLTAGE




1. Turn the ignition off to the lock position.
2. Disconnect the FAD Module harness connector.
3. Ignition on, engine not running.
4. Measure the voltage between ground and the (G303) Front Axle Lock Signal circuit in the DTCM harness connector.

Is any there voltage present?

Yes

- Repair the the (G303) Front Axle Lock Signal circuit for a short to voltage.
- Perform the DTCM VERIFICATION TEST. DTCM Verification Test.

No

- Go To 5

5. (G303) FRONT AXLE LOCK SIGNAL CIRCUIT SHORTED TO GROUND




1. Turn the ignition off to the lock position.
2. Measure the resistance between ground and the (G303) Front Axle Lock Signal Control circuit in the DTCM harness connector.

Is the resistance below 5.0 Ohms?

Yes

- Repair the (G303) Front Axle Lock Signal circuit for a short to ground.
- Perform the DTCM VERIFICATION TEST. DTCM Verification Test.

No

- Go To 6

6. (G303) FRONT AXLE LOCK SIGNAL CIRCUIT OPEN




1. Measure the resistance of the (G303) Front Axle Lock Signal circuit between the DTCM harness connector and the FAD Module harness connector.

Is the resistance above 5.0 Ohms?

Yes

- Repair the (G303) Front Axle Lock Signal circuit for an open or high resistance.
- Perform the DTCM VERIFICATION TEST. DTCM Verification Test.

No

- Go To 7

7. (G304) FRONT AXLE LOCK CONTROL CIRCUIT OPEN




1. Measure the resistance of the (G304) Front Axle Lock Control circuit between the DTCM harness connector and the FAD Module harness connector.

Is the resistance above 5.0 Ohms?

Yes

- Repair the (G304) Front Axle Lock Control circuit for an open or high resistance.
- Perform the DTCM VERIFICATION TEST. DTCM Verification Test.

No

- Go To 8

8. (T315) SHIFT MOTOR CONTROL A CIRCUIT SHORTED TO VOLTAGE




1. Turn the ignition off to the lock position.
2. Disconnect the Transfer Case Motor (AWD) C1 harness connector.
3. Ignition on, engine not running.
4. Measure the voltage between (T315) Shift Control Motor A circuit and ground.

Is there any voltage present?

Yes

- Repair the short to ground in the (T315) Shift Motor Control A circuit.
- Perform DTCM VERIFICATION TEST. DTCM Verification Test.

No

- Go To 9

9. (T316) SHIFT CONTROL MOTOR B CIRCUIT SHORTED TO VOLTAGE




1. Measure the voltage between (T316) Shift Control Motor B circuit and ground.

Is there any voltage present?

Yes

- Repair the short to voltage in the (T316) Shift Control Motor B circuit.
- Perform DTCM VERIFICATION TEST. DTCM Verification Test.

No

- Go To 10

10. DRIVE TRAIN CONTROL MODULE (DTCM)
1. Using the wiring diagram/schematic as a guide, inspect all wiring and connectors that pertain to this circuit.

Were any problems found?

Yes

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

No

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

11. INTERMITTENT WIRING HARNESS 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 harness and connectors specific to this circuit.
3. Wiggle test the wiring harness and connectors while monitoring the scan tool data relative to this circuit.
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.

pro multis Credits:Operation CHARM About Operation CHARM