Diagnostic Test

WARNING: This page is about a different car, the 2011 RAM Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.

ACTIVE DTC
1. Turn the ignition on, engine not running.
2. With the scan tool, navigate to Actuator Tests and actuate the DEF Supply Pump Heater.
3. With the scan tool, View DTCs.
  Is the DTC Active?
  
  Yes
  - Go To 2.
  No
  - Perform the INTERMITTENT CONDITION - 6.7L. Refer to INTERMITTENT CONDITION - 6.7L .
CHECK THE RESISTANCE OF THE DEF SUPPLY PUMP HEATER
1. Turn the ignition off.
2. Disconnect the DEF Supply Pump Assembly harness connector.
3. Measure the resistance across the terminals of the DEF Supply Pump Heater circuits at the DEF Supply Pump Assembly.
  Is the resistance above 2.0 Ohms?
  
  Yes
  - Go To 3.
  No
  - Replace the DEF Supply Pump Assembly in accordance with the service information. Refer to ASSEMBLY, Diesel Exhaust Fluid Pump , Removal .
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
CHECK THE (K471) DEF SUPPLY PUMP HEATER SUPPLY CIRCUIT FOR A SHORT TO ANOTHER CIRCUIT

Fig 1: Checking DEF Supply Pump Heater Supply Circuit For A Short
Courtesy of CHRYSLER LLC
1. Disconnect the DEF Dosing Control Unit C1 harness connector.
2. Measure the resistance between the (K471) DEF Supply Pump Heater Supply circuit and all other circuits at the DEF Dosing Control Unit C1 harness connector.
  Is the resistance above 10k Ohms between the (K471) DEF Supply Pump Heater Supply circuit and all other circuits?
  
  Yes
  - Go To 4.
  No
  - Repair the short between the (K471) DEF Supply Pump Heater Supply circuit and the circuit that measured below 10k Ohms.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
CHECK THE (K472) DEF SUPPLY PUMP HEATER RETURN CIRCUIT FOR A SHORT TO ANOTHER CIRCUIT

Fig 2: Checking DEF Supply Pump Heater Return Circuit For A Short
Courtesy of CHRYSLER LLC
1. Measure the resistance between the (K472) DEF Supply Pump Heater Return circuit and all other circuits at the DEF Dosing Control Unit C1 harness connector
  Is the resistance above 10k Ohms between the (K472) DEF Supply Pump Heater Return circuit and all other circuits?
  
  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 POWERTRAIN VERIFICATION TEST - 6.7L .
  No
  - Repair the short between the (K472) DEF Supply Pump Heater Return circuit and the circuit that measured below 10k Ohms.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .