PRESS THE "OK"BUTTON WHEN ASKED TO BEGIN SESSION.Ĥ. PRESS THE "OK" BUTTON ON THE MDS2 TO REQUEST A L4DS2 SESSION FOR THE VEHICLE VIN INDICATED. THE "CANNOT READ VIN FROM DRB III" MESSAGE (ON THE MDS2) WILL BE REPLACED BY THE VEHICLE VIN. NOTE: AUTO CONNECTION WILL OCCUR ONCE THE DRB III, MDS2, AND VEHICLE ESTABLISH COMMUNICATION. Connect the MDS2 and DRBIII to the vehicle and switch the ignition key to"ON". Log onto the MDS2 (Mopar Diagnostic System).Ģ. WHEN USING THE MDS2 AND THE DRB III, THE SYSTEM MUST BE OPERATING AT CIS CD 2090 OR HIGHER (2090 ARRIVES IN DEALERSHIPS ON SEPTEMBER 3, 2001).ġ. NOTE: THE MDS2 AND DRB III ARE REQUIRED TO PERFORM PART OF THIS REPAIR. General Purpose Interface Bus Cable (GPIB) If other Diagnostic Trouble Codes ( DTC) are present, record them on the repair order and repair as necessary before proceeding further with this bulletin. Using the Diagnostic Scan Tool (DRBIII) with the appropriate Diagnostic Procedures, verify all engine/transmission systems are functioning as designed. If the vehicle is left idling, without use of the block heater, 1200 rpm operation will begin when the intake temperature drops below O☌ (32☏) and coolant is less than 60☌ (140☏).ġ. Use of the 110V block heater will not allow the feature to function after an overnight soak. NOTE: ANY TYPE OF AFTERMARKET IDLE SPEED KICKER THAT ACTIVATES THE APPS WILL DISABLE THIS FEATURE. In order to operate properly, the Accelerator Pedal Position Sensor ( APPS) must stay at idle. If the engine continues to idle and coolant temperature is at or below 60☌ (140°'F), the feature will re enable. ![]() Coolant Temperature is greater than 79☌ (175☏).Įngine speed will return to normal operation at 800 rpm. Vehicle Speed is greater than 0 mph or,ĥ. Throttle position is greater than 0% or,Ĥ. The Service Brake pedal is depressed or,ģ. The Automatic Transmission is placed in gear (forward or reverse) or,Ģ. This allows the engine to create increased heat in the cooling system, allowing more rapid engine warm up and cab heating.īoth features will automatically disable when one of the following occurs:ġ. The Service Brake pedal is not depressed and,Īdditionally, if Intake Manifold Temperature (IMT) is less than -9☌ (15☏), and all of the parameters above are met, three of the cylinders will be shut off upon reaching 1200 rpm, creating a slight change in engine sound which is normal. The Transmission is in Neutral or Park and,Ĥ. Coolant Temp is less than 60☌ (140☏) and,ģ. ![]() Intake Manifold Temperature less than 0☌ (32☏) and,Ģ. Once enabled, idle speed will slowly ramp up from 800 rpm to 1200 rpm when all of the following conditions are met:ġ. A new software feature, enabled or disabled through the DRB III (See instructions under Repair Procedure), reduces the chance of valve sticking and improves cab heat warm-up time. This allows varnishes/oils to condense on the exhaust valve stems, leading to stuck valves, and damaged valve train components. This bulletin involves selectively erasing and reprogramming the Engine Control Module ( ECM) with new software (Cal 55Tl8, 57Tl1, 56Tl3, 59T7b, and 59T8b.)Įxtended idle operation, especially in cold weather, can lead to stuck valves and bent push-tubes due to insufficient cylinder heat. NOTE: THIS BULLETIN APPLIES TO ALL RAM TRUCKS BUILT AFTER DECEMBER 17,1997 AND EQUIPPED WITH THE 24-VALVE 5.9L CUMMINS DIESEL ENGINE.
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