Caterpillar PEEC certain parameters may not be programmable if the Communication Adapter II or CAT Communication Adapter III is connecting the service tool to the Programmable Electronic Engine Control (PEEC).
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If this occurs, perform the following steps:
1 Locate the 9-pin connector (diagnostic connector). Refer to the engine’s schematics.
Note: For PEEC engines, the diagnostic connector is J1. For PEEC III engines, the diagnostic connector is J8.
2 Locate Pin F. This is the pin used for programming. It must be grounded in order to change parameters.
3 Install a jumper between Pin B and Pin F, or connect Pin F to engine ground. Ensure that existing wires remain connected to the 9-pin connector.
If Pin F is not properly grounded, some of the following parameters will be affected: Engine Serial Number, Personality Module Code, Full Load Setting, and Full Torque Setting.
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