1990/12/17 Caterpillar

Personality Module Software Updated; Do Not Troubleshoot Diagnostic Code 55 (No Detected Faults){1901,1902}

Usage:

3406B ( 8TC, 5YG ) (PEEC) Truck Engines

Reference: Service Magazine; August 13, 1990; Page 11; "Effective Dates, Serial Numbers And Features Of PEEC Personality Modules" for 3406B (PEEC) Truck Engines.

In May 1990, the software for the 3406B PEEC Truck Engine Personality Module was updated. This involved a change in the application of Diagnostic Codes 34 (loss of engine rpm signal), and 55 (no detected faults). With the new software installed, the ignition key "ON", and the engine NOT running, Diagnostic Code 34 will be present on the Electronic Controller Analyzer Programmer (ECAP) or Digital Diagnostic Tool (DDT) screen. However, Diagnostic Code 55 will appear on the Diagnostic Lamp, indicating that there are no ACTIVE Diagnostic Codes in the PEEC system. It should be noted that Diagnostic Code 55 does NOT indicate a PEEC fault, but only that the system is operating correctly. Prior to the updated software, Diagnostic Code 34 was displayed on the Diagnostic Lamp under the same conditions as described above.

The updated software was effective with 3406B (5YG392, 8TC13244) PEEC Truck Engines, and is adaptable to first production.

Caterpillar Information System:

1990/12/17 New Rotor Used In BrakeSaver Group; Regulator Valve Improved{1155}

1990/12/17 New Bronze Thrust Plate Used On Center Main Bearing Of Crankshaft Groups{1203}

1990/12/17 Remanufactured Camshafts And Cam Kits Available For Parts Service{1210,1211,1212}

1990/12/17 Use The Marketing Publications Information Feedback Systems{0374}

1990/12/10 New Engine Magnetic Speed Sensor Used{1907}

1990/12/10 Tools Available For Out-Of-Chassis Dynamometer Testing Of Electronic Engines{0781,1901,1913}

1990/12/10 New Rear Power Takeoff Clutch Plates Do Not Contain Asbestos{3055,3404}

1990/12/10 New 7E5085 Bushing Replaces Former 2M4314 Bushing In Fuel Injection Pump Groups{1251}

1990/12/10 Correct Handling And Replacement of 3T6962 Pressure Switch Assembly{7332}

1990/12/10 Correct Handling And Installation Of Temperature Switch Assemblies{1906}

1990/12/10 Improved 9W1077 Start Switch Assembly And 7N4160 Heat Start Switch Group{1416}

1990/12/10 New Caterpillar Warranty Statement For Ground Engaging Tools, SELF5138{6800}

1990/12/17 New Ether Starting Aid Groups Available{1456}

1990/12/24 Sealed Alternators Available For Earthmoving Applications{1405}

1990/12/24 Incorrect Specification For Tightening Turbocharger Compressor Nut In Service Manual For 3306B Diesel Truck Engine, SEBR0545-01{1052}

1990/12/24 Installation Of Zinc Rods In Caterpillar Marine Engines{1350,1388}

1990/12/24 Air Pressure Settings For Pneumatic Selector Control Valve On Reintjes® Marine Transmissions{3313}

1990/12/24 Update Information For Exhaust Manifolds{1059}

1990/12/24 New 3E0020 Vehicle Speed Buffer Used{1914,1900}

1990/12/24 New Seals Available For Parts Service Of Noncurrent Water Lines Group{1380,1155,1378}

1990/12/24 Oversized Intake And Exhaust Valve Seat Inserts Available For Spark-Ignited Engine Heads{1103}

1990/12/24 Auxiliary Oil Filter Groups Used To Increase Oil Capacity And Extend Oil Change Interval To 750 Hours{1318,7534}

1990/12/24 New Tube And Bracket Provide Clearance For Alternator{1380,1405}

1991/01/07 Checking Crankshaft Journal Surface Hardness On Remanufactured Crankshafts{1202}