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.
- ACTIVE DTC
- Turn the ignition on for one minute, engine not running.
- With the scan tool check for active DTCs.
Is the DTC active?
Yes
- Go To 2
No
- Perform the INTERMITTENT CONDITION - 6.7L. Refer to STANDARD PROCEDURE .
- CHECK THE DEF TANK TEMPERATURE SENSOR
- Ignition on, engine not running.
- Disconnect the DEF Supply Pump Assembly harness connector.
- With the scan tool check DTCs.
- Monitor the scan tool for one minute.
Did DTC P205D set as active after disconnecting the sensor?
Yes
- Replace the DEF Supply Pump Assembly in accordance with the service information.
- Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to STANDARD PROCEDURE .
No
- Go To 3
- CHECK THE DEF TANK TEMPERATURE SENSOR SIGNAL CIRCUIT FOR A SHORT TO GROUND
- Turn ignition off.
- Disconnect the DEF Dosing Control Unit C2 harness connector.
- Measure the resistance between ground and the DEF Tank Temperature Sensor Signal circuit at the DEF Supply Pump Assembly harness connector.
Is the resistance above 10k Ohms?
Yes
- Go To 4
No
- Repair the DEF Tank Temperature Sensor Signal circuit for a short to ground.
- Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to STANDARD PROCEDURE .
- CHECK FOR THE DEF TANK TEMPERATURE SENSOR SIGNAL CIRCUIT SHORTED TO THE DEF TANK TEMPERATURE SENSOR RETURN CIRCUIT
- Measure the resistance between the DEF Tank Temperature Sensor Signal circuit and the DEF Tank Temperature Sensor Return circuit at the DEF Supply Pump Assembly harness connector.
Is the resistance above 10k Ohms?
Yes
- Replace the DEF Dosing Control Unit in accordance with the service information. Refer to UNIT, DIESEL EXHAUST FLUID DOSING CONTROL, REMOVAL .
- Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to STANDARD PROCEDURE .
No
- Repair the short between the DEF Tank Temperature Sensor Signal circuit and the Fuel Temperature Sensor Return circuit.
- Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to STANDARD PROCEDURE .
- Measure the resistance between the DEF Tank Temperature Sensor Signal circuit and the DEF Tank Temperature Sensor Return circuit at the DEF Supply Pump Assembly harness connector.