ROCKER ARM GP 2221186 - Caterpillar

Features
1. The engine will no longer enter a low power protection (derate) mode when diagnostic code 108-03 or 108-04 (flash code 26) "Atmospheric Pressure Sensor Open or Short Circuit" code is active ("C" and "D" Series Agricultural Tractors).2. Fuel pressure monitoring has been added ("D" Series Agricultural Tractors only).3. Multi-Torque (Triple Hp) operation has been added (85D Agricultural Tractors only).There have been no new customer parameter additions.
Diagnostic And Service Improvements
1. The electronic service tool feature that allows a service technician to override the automatic multi-torque (dual Hp) on Challenger 85C Agricultural Tractors was expanded for use on the multi-torque (triple Hp) Challenger 85D Agricultural Tractors. This allows manual selection of the low, middle, or high horsepower rating. The rating selection remains active until the service technician turns the override off or the engine is shut down and restarted. This allows the service technician to go to other service tool screens or even disconnect the service tool and go for a test drive. Multi-torque override allows engine dynamometer testing at low, middle, or high horsepower ratings and reduces time to troubleshoot electronic system problems. This feature is called "Override Parameters" and can be found in the "Interactive Diagnostics" section of the service tool.2. An electronic service tool can display whether the 3196 engine in Challenger 85D Agricultural Tractors is operating in the low, middle, or high horsepower mode. This can be done by viewing the "Multi-Trq Mode" status parameter.3. An altitude derate status parameter called "Alt Derate" has been added. If the engine detects operation at altitude and power is being limited "Active" will be displayed. The altitude derate is a gradual reduction in power that starts to take effect between 2286 m (7,500 ft) and 3657 m (12,000 ft) depending on Challenger model. "Not Active" will be displayed if the engine is NOT being operated at altitude.4. For "D" Series Agricultural Tractors, several new diagnostic codes have been added. See Chart B. 5. For both "C" and "D" Series Agricultural Tractors, some diagnostic codes have been REMOVED. See Chart C. 6. The fuel pressure status parameter is no longer displayed on "C" Series Agricultural Tractors (4KK500-Up and 9TK1-Up) with 3176B engines as these engines do not have fuel pressure sensors.Electronic System Improvements
1. The diagnostic (fault) code strategy for Challenger 85C transmission pressure sensors has been improved. This will reduce false logging of the diagnostic code 35-11 (flash code 91) which can cause the engine to be locked into Low HP mode.2. Diagnostic code 190-02 (flash code 34), "Loss of Engine RPM Signal", is no longer active when the engine is not running. With the engine OFF, "55" will be flashed if no other diagnostic codes are present.3. The correct altitude derate information is now provided to the data link. This information is used in the display status screens of the service tool.4. Logged events such as Engine Overspeed Warning can now be cleared from the service tool display.