Engine Controls - Engine System Enhancements: Overview
NUMBER: 18-022-07GROUP: Vehicle Performance
DATE: March 14, 2007
THIS BULLETIN SUPERSEDES TECHNICAL SERVICE BULLETIN 18-022-06 DATED JULY 13, 2006, WHICH SHOULD BE REMOVED FROM YOUR FILES. ALL REVISIONS ARE HIGHLIGHTED WITH **ASTERISKS** AND INCLUDE THE ADDITION OF DTC P0191 - FUEL RAIL PRESSURE SENSOR CIRCUIT PERFORMANCE.
THE DRBIII(R) FLASH FILES FOR THIS BULLETIN ARE AVAILABLE ON DealerCONNECT.
SUBJECT:
Flash: 5.9L Turbo-Diesel Engine System Enhancements
OVERVIEW:
This bulletin involves selectively erasing and reprogramming the Engine Control Module (ECM) with new software.
MODELS:
2003 - 2005 (DR / DH) Ram Truck
NOTE:
This bulletin applies to vehicles equipped with a 5.9L turbo diesel engine (sales codes ETC and ETH respectively).
SYMPTOM/CONDITION:
The following enhancements are included with this software:
1. Improved engine cooling (radiator fan activation) and prevention of possible engine overheat. When coolant temperature faults are present the radiator fan is enabled (turned on) during vehicle operation.
2. Correction to oil pressure reading when engine is operating at higher engine temperatures above 91°C (195°F).
3. Improvement to the Temperature Sensor Rationality Test to prevent possible false test failures and the following related Diagnostic Trouble Codes (DTC's):
a. DTC P0071 - Inlet Air Temperature Sensor Rationality.
b. DTC P0111 - Intake Air Temperature (IAT) Sensor Rationality.
c. DTC P0514 - Battery Temperature Sensor Rationality.
4. Additional Water-In-Fuel (WIF) warning added to indicate that the operator has had a WIF DTC P2269 and has continued to operate (drive) the vehicle in excess of 500 miles without draining the water from the fuel filter. The following is the new WIF DTC that has been added:
a. DTC P0169 - WIF Too Long Error
5. ** Improvement to the Fuel Pressure Rationality Test to prevent possible false test failures and the following related Diagnostic Trouble Code:
a. DTC P0191 - Fuel Rail Pressure Sensor Circuit Performance (2004.5 to 2005 M.Y. vehicles). **
DIAGNOSIS:
Using a Scan Tool (DRBIII(R)) with the appropriate Diagnostic Procedures available in TechCONNECT, verify all engine systems are functioning as designed. If DTCs are present record them on the repair order and repair as necessary before proceeding further with this bulletin.
If the vehicle operator describes or experiences the Symptom/Condition, perform the Repair Procedure.
SPECIAL TOOLS / EQUIPMENT REQUIRED:
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.