TROUBLESHOOTING -726280167

TM 9-2320-364-20-1

Section IV. TROUBLESHOOTING

2-10. TROUBLESHOOTING INTRODUCTION.

This section contains step-by-step procedures for identifying, locating, isolating and repairing equipment

malfunctions.

This manual cannot list all malfunctions that may occur, nor all tests or inspections and corrective actions. If a

malfunction is not listed or is not corrected by listed corrective actions, notify the supervisor.

2-11. TROUBLESHOOTING INSTRUCTIONS.

The first part of this section explains the use of the Troubleshooting Logic Tree. These procedures make use of

Simplified Test Equipment for Internal Combustion Engines-Reprogrammable (STE/ICE-R), Detroit Diesel Electronic

Control II (DDEC II) and Allison Transmission Electronic Control (ATEC) for testing and fault isolation. DDEC

III/IV Troubleshooting is located in Para 2-14.

a. Simplified Test Equipment for Internal Combustion Engines - Reprogrammable (STE/ICE-R). The

PLS truck is equipped with several STE/ICE-R sensors that are used to support troubleshooting procedures.

STE/ICE-R tests, employing these sensors, are incorporated into the standard troubleshooting tests to aid in fault

isolation. The STE/ICE-R acts as a conventional digital multimeter to measure voltage, current and resistance. It can

also measure pressure, speed, compression unbalance, engine power and some specialized battery and starter

evaluations. The STE/ICE-R is powered by the truck batteries using an electrical harness called the Diagnostic

Connector Assembly (DCA). The complete system includes a truck test meter (VTM), a transducer kit (TK), cables,

transit case and technical publications. The STE/ICE-R can make TK measurements while connected to the DCA.

STE/ICE tests are referenced. VIN number for PLS truck is "38".

Diagnostic Data Reader (DDR) Description.

(1)

DDR cartridge replacement.

(a)

Disconnect DDR cable from DDL

connector MC13.

(b)

Hold DDR with thumbs placed

against slanted surface and grasp

cartridge with fingers.

(c)

Squeeze DDR, push thumbs forward

against slanted surface, and slide

cartridge back at the same time.

(d)

Slide cartridge from DDR.

(e)

Seat cartridge on back of DDR.