HOSE 2398142 - Caterpillar

3406B (PEEC) ( 8TC)Introduction
The testing procedures, in this instruction, provide an inexpensive method to check the integrity of the truck wiring system. Specifically, that part of the truck wiring system which is directly related to the 3406B Programmable Electronic Engine Control (PEEC) Engine.The procedures can be performed using only a voltmeter and breakout "T"s (adapter cables).Also, there are two additional areas of PEEC - related truck system responsibility which are not covered by the testing procedures.Refer to PEEC Truck System Tests Not Covered by the Digital Multimeter, in this instruction.A section of this instruction, PEEC System Operations, briefly describes operation of a truck with PEEC.This section also defines the Customer Specified Parameters.Reference: Special Instructions SEHS8741 ... Using the 8C5919 PEEC Functions Service Program Module ... andSEHS8742 ... Using the 8T8697 Electronic Control Analyzer Programmer (ECAP) ... orSEHS8743 ... Using the 8T5282 Digital Diagnostic Tool (DDT) Group With the 3406B Programmable Electronic Engine Control (PEEC) Module. Service Manual (Module)Service Manual (Module) ... SENR3479 ... 3406B (PEEC) Truck Engine Test Procedures These publications are not needed for all portions of the troubleshooting procedures and will ONLY be referenced when required.Tools Required
Refer to REFERENCE, in this instruction, for the related special instructions.8T8697 Electronic Control Analyzer Programmer (ECAP) ... or8T5282 Digital Diagnostic Tool (DDT) Group6V7070 Digital Multimeter, (preferred), or 6V7800 Digital Multimeter (Regular Duty).8T8726 Adapter Cable Assembly - Three pin breakout "T" (Included with 8T5282 Group).8T8694 Adapter Cable Assembly - Five pin breakout "T".8T8695 Adapter Cable Assembly - Nine pin breakout "T".
DO NOT use probes through (puncture) the wire insulation. This will damage the wire insulation and reduce PEEC's resistance between circuits and to ground.
Wire removal tool - 1U5805 Electrical Connector for 12 - 14 gauge wire or 8T5318 Electrical Connector for 16 - 18 gauge wire.Contact the OEM for suggested repair procedures to the truck wiring and pins.Contact a Caterpillar dealer or a TEPS dealer for new connectors.Test Procedure
1. Interview the driver to determine the details of the problem: * When the problem occurs ... and/or* Under what conditions.2. Determine which operational problem exists.Refer to Operational Problem Chart in this instruction.3. Check voltages and/or ohms at the connector shown to the right of the existing Operational Problem shown in Operational Problem Chart, in this instruction.Refer to Location of PEEC Truck System Connectors, in this instruction, to help determine the physical location of the connectors.4. Correct any error that is found within the truck connectors, pins, wires or switches.Refer to PEEC System Wiring Schematic in this instruction, to follow current flow.5. If the problem is not resolved by obtaining the proper voltages and/or ohms at the appropriate connectors: * The problem may be within the PEEC engine system or* One of the two areas shown in the following section, PEEC Truck System Tests Not Covered by the Digital Multimeter. Further tests will require the use of specified PEEC service tools, Service Program Modules (SPM) and Special Instructions:Refer to Reference and Tools Required in this instruction.PEEC Truck System Tests Not Covered by the