Diagnostic Test
WARNING: This page is about a different car, the 2013 RAM 3500 HD and 2013 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.
- OTHER DTCS
- Turn the ignition on, engine not running.
- With the scan tool, View DTCs.
Are any of the P202A, P202B, P202C, P205C, P205D, P205E DTCs Active?
Yes
- Perform the diagnostic procedures for the other active DTCs before proceeding with this test.
No
- Go To 2
- CHECK FOR HIGH RESISTANCE IN THE DEF TANK HEATER SUPPLY CIRCUIT
- Turn the ignition off.
- Disconnect the DEF Supply Pump assembly harness connector.
- Disconnect the DEF Dosing Control Unit C2 harness connector.
- Measure the resistance of the DEF Tank Heater Supply circuit between the DEF Supply Pump assembly harness connector and the DEF Dosing Control Unit C2 harness connector.
Is the resistance below 5.0 Ohms?
Yes
- Go To 3
No
- Repair the DEF Tank Heater Supply circuit for an open or high resistance.
- Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to STANDARD PROCEDURE .
- CHECK FOR HIGH RESISTANCE IN THE DEF TANK HEATER RETURN CIRCUIT
- Measure the resistance of the DEF Tank Heater Return circuit between the DEF Supply Pump assembly harness connector and the DEF Dosing Control Unit C2 harness connector.
Is the resistance below 5.0 Ohms?
Yes
- Repair the DEF Tank Heater Supply circuit for an open or high resistance.
- Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to STANDARD PROCEDURE .
No
- Repair the DEF Tank Heater Return circuit for an open or high resistance.
- Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to STANDARD PROCEDURE .
- Measure the resistance of the DEF Tank Heater Return circuit between the DEF Supply Pump assembly harness connector and the DEF Dosing Control Unit C2 harness connector.