Emissions - Mis-Assembled DEF/Coolant Control Valve
NUMBER: 25-002-10GROUP: Emissions Control
DATE: September 22, 2010
THIS SERVICE BULLETIN IS ALSO BEING RELEASED AS RAPID RESPONSE TRANSMITTAL 10-063. ALL APPLICABLE SOLD AND UN-SOLD VIN's HAVE BEEN LOADED. TO VERIFY THAT THIS SERVICE ACTION IS APPLICABLE TO THE VEHICLE, USE VIP OR PERFORM A VIN SEARCH IN TECHCONNECT. ALL REPAIRS ARE REIMBURSABLE WITHIN THE PROVISIONS OF WARRANTY.
SUBJECT:
Mis-assembled Diesel Exhaust Fluid Engine Coolant Control Valve
OVERVIEW:
This bulletin involves replacing the Diesel Exhaust Fluid (DEF) engine coolant control valve assembly. Some of the involved vehicles may also require draining and adding DEF.
MODELS:
2011 DD/DP Ram Trucks (Cab Chassis 3500/4500/5500)
NOTE:
This bulletin applies to vehicles equipped with the 6.7L Cummins Diesel engine (Sales Code ETJ) built between March 3, 2010 (MDH 0303XX) and July 19, 2010 (MDH 0719XX).
DISCUSSION:
Some Ram Trucks may have been built with a DEF engine coolant control valve that may be internally mis-assembled which may not be able to completely shut the flow of coolant passing through the coolant tubes in the DEF tank allowing the DEF temperature to rise above its normal operating range. DEF that has been exposed to elevated temperatures can cause the DEF to degrade.
SYMPTOM/CONDITION:
All applicable vehicles (sold and unsold) require the replacement of the DEF engine coolant control valve and hose assembly. If the vehicle has been driven with a mis-assembled DEF coolant control valve that allowed the coolant to flow through the coolant tubes in the DEF tank, the DEF may have degraded causing the Malfunction Indicator Lamp (MIL) to illuminate. Upon further investigation, Diagnostic Trouble Code (DTC) P205B may be found in the Powertrain Control Module's (PCM) memory as either active or stored.
DIAGNOSIS:
Perform the following repair procedure for all affected vehicles. In addition, if the vehicle is a sold vehicle, verify DEF level using the information provided in the vehicles Electronic Vehicle Information Center (EVIC). Record this value for later use. Then, using a Scan Tool (wiTECH ) with the appropriate Diagnostic Procedures available in TechCONNECT verify the presence of DTC P205B is either stored or active in the PCM's memory. If DTC's other then P205B are present record them on the repair order and repair as necessary after performing the following repair procedure. Proceed to the Repair Procedure.
PARTS REQUIRED:
SPECIAL TOOLS/EQUIPMENT REQUIRED:
REPAIR PROCEDURE:
1. Replace the DEF engine coolant control valve. Refer to the procedures outlined in DealerCONNECT > TechCONNECT > Service info > 25 - Emissions Control > Diesel Exhaust fluid Emissions, 6.7L Diesel > VALVE, Diesel Exhaust Fluid Engine Coolant Control > Removal/Installation.
2. Is the vehicle UNSOLD?
a. YES - Repair is complete
b. NO - Perform Step # 3.
3. Did the PCM have DTC P205B stored/active in it's memory?
a. YES - Perform Step # 4
b. NO - Repair is complete.
4. The DEF tank must be less than 1/2 tank full (40% or less on the EVIC) to proceed. If the DEF tank is over 1/2 tank full, remove and dispose enough DEF to ensure that the tank is less than half full.
5. Fill the DEF tank with at least four (4) gallons of DEF (p/n 68035704AA).
POLICY:
Reimbursable within the provisions of the warranty.
TIME ALLOWANCE:
FAILURE CODE:
Disclaimer:
This bulletin is supplied as technical information only and is not an authorization for repair.