1996/03/27 Caterpillar

False Logging Of Cylinder Fault Codes While Using The Engine Retarder{1900,1901,1119}

Usage:

3176B (9CK),
3406E (5EK) Truck Engines Equipped With An Engine Retarder

Some of these engines will log cylinder fault diagnostic codes (1-11, 2-11, etc.) as a result of using the engine retarder. The diagnostic codes are usually logged just as the engine retarder is turning off. These diagnostic codes have no effect on the vehicles' performance, but the vehicles are brought in for service because the diagnostic lamp comes on. Frequently this results in the electronic control module (ECM) being replaced. This is NOT necessary.

To fix this problem, check for and repair any loose connections between the retarder solenoid wires and the solenoids. In addition, the NOV95 software has an improved cylinder fault logging strategy, so FLASH the ECM with NOV95 software. This solution is only valid for vehicles that are NOT experiencing any performance problems.

Caterpillar Information System:

1996/03/27 New Jake Brake Slave Piston Lash Setting{1119}

1996/03/27 Possible Sources of High Crankcase Blowby From Breather Tube{1317}

1996/02/26 New Speed/Timing Sensor {1912}

1996/02/26 Engine Coolant Loss And/Or Overheating Can Be Caused By Incorrect Shunt Line Connection{1380}

1996/02/26 Troubleshooting Information For Horton Diesltemp© Fan Clutches{1359}

1996/02/26 New Oil Pan Resists Cracking{1302}

1996/02/26 Modification For 9U-7256 Guide Assembly (Camshaft){1210,0701,0702,0703}

1996/02/26 New Material Used In O-Rings And Optional New Block Side Cover Replacement{1201}

1996/02/26 New Engine Cylinder Head Injector Sleeve Used In Both Mechanical Unit Injection (MUI) And Hydraulic Electronic Unit Injection (HEUI) Engines{1125}

1996/02/26 Lubricant Used On Cylinder Head Bolts Changed{1100}

1996/02/26 Fuel Injector Sleeve Replacement Tooling{0703,1125}

1996/02/26 New Engine Information Plates Require More Information{1000}

1996/03/27 Uprateability Improvements{1902}

1996/03/27 Personality Module Covers On Electronic Control Modules (ECM'S){1902}

1996/03/27 Electronic Changes And Features{1901}

1996/03/27 Camshaft Conversion Kits Available{1110}

1996/03/27 Improvements To Camshafts, Unit Injector Rocker Arms, And Valve Rocker Arms{1123,1210}

1996/03/27 Fuel Injection Pump Barrel Sealing Face Reconditioning{1251}

1996/03/27 Fuel Injection Nozzle Reference {1254}

1996/04/19 New Star-Burst Perforated Steel Core Exhaust Manifold Gasket Provides Longer Service Life{1059}

1996/04/19 Viscous Damper Assembly Used In Production{1205}

1996/04/19 Unit Injector Adjustment Reminder{1290}

1996/04/19 Things To Check BEFORE Replacing An Electronic Control Module (ECM){1901}

1996/04/19 Check Valve May Be Needed To Accurately Measure Engine Return Fuel Flow{0706,0774,0782}