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DDT Glossary
DDTDigital Diagnostic ToolECMElectronic Control ModuleEPROMErasable Programmable Read Only MemoryFUNCFunctionLCDLiquid Crystal DisplayRAMRandom Access MemoryROMRead Only MemorySPMService Program ModuleNEXG4528 Contents
1. NEXG4528 Service Program Module2. NEHS1757 Operating Manual(Not shown) NEEG2300 Case Lid Label(Not shown) NEEG2850 DDT Black Label NEEG forms may not be included in automatic updates of NEXG4528.Disclaimer
The features of this SPM may or may not be functional on some applications.This may be due to manufacturing design changes.All information, illustrations, and specifications in this manual are based on current information at the time of printing.The right is reserved to make changes at any time without notice.Service Program Module Installation
Service Program Module updates for the DDT will be available through Caterpillar.The Service Program Modules are packaged in a protective container. Use care when opening to prevent damage to the program module. 1. Place DDT (1) face down on a clean and level surface. 2. Remove six screws (2) holding cover (3) in place and remove cover for access to DDT circuit board (4).3. Locate Service Program Module socket (5) on circuit board (4).
Use only finger pressure to remove or install a Service Program Module.
The use of any mechanical tool can damage the Service Program Module or socket. 4. Install Service Program Module (6) from Conversion Group into empty socket (5). The Service Program Modules and sockets are keyed so that they can only be installed in the correct (seated) position.5. Reinstall cover panel (3) using six screws (2).Decal Installation
1. Place the 6V3072 carrying case (1) on a clean surface with the handle toward you as shown.2. Remove paper backing of the case decal (2) and install on case lid insert with bottom of decal facing handle side of case. 1. Place DDT (1) face down on a clean and level surface.2. Remove paper backing of the DDT Back Graphic Decal (2) and install on DDT back cover.Power and Data Link Connector
1. Locate data link connector on Electronic Control Module (ECM) wiring harness.2. Connect 7X1685 Cable to DDT connector. 3. Connect the remaining end of 7X1685 Cable (1) to Control Port (2) on the DDT (3). For CSA environments a 7X1414 adapter cable is needed to connect to a 10 pin MS connector or a 7X1415 adapter cable is needed to connect to a 4 pin MS connector.The DDT will turn ON when power is supplied to the electronic control module.DDT Description
1. LCD is the window which all screens are displayed2. CONTROL port communicates with the Electronic Control Module (ECM) through the 7X1685 Cable Assembly3. CLEAR Pressing the CLEAR key will: * Clear the ECM NOT FOUND display.* Place 01 in front of the MODE/FUNCTION identifier.* Reread data that displays as Unavailable.* Clear the FAULT = display.* Abort the Crankcase Pressure Calibration if feature found on ECM.4. Select Mode Pressing the Select Mode key will scroll to the next available Mode each time the key is pressed5. SELECT FUNC Pressing the SELECT FUNC key will scroll to the next available Function each time the key is pressed6. ENTER Pressing the ENTER key will: * Scroll to the next available diagnostic code (01 is shown as the mode on the display).* Go directly to the Mode or Function whose unique 2-digit number is shown on the display.7. ALT1 Pressing the ALT1 Key will: * Will put the displayed Function into its programming mode if the Function is a programmable Function.* Will put the displayed Function into its calibration mode if the Function is a calibrating Function.8. ALT2 Pressing the ALT2 key will alternate between displaying the main screen and alternate screen if an alternate screen is available for the displayed Mode or Function.Trouble Shooting the DDT
LCD display is blank* Disconnect and reconnect the 7X1685 cable or* Replace 7X1685 cable or* Service is requiredLCD display top line is black and bottom line is blank* Disconnect and reconnect the 7X1685 cable or* Pull out and reinsert the Service Program Module or* Service is requiredLCD display bottom line shows 'NO CODES'* Normal, no diagnostic faults have been receivedLCD display top line shows 'INVALID CODE'* Enter a valid unique 2 digit menu or function numberLCD display does not change when the 0 key is pressed while entering a change to a parameter* Only one leading zero is allowed while entering a parameterLCD display does not change when the (0-9) is pressed while entering a change to a parameter* The maximum allowable characters have been entered for the parameterSpecifications
Read Only Storage: 16384 bytes of Read Only Memory (ROM)Operating Temperature: 0°C (32°F) to 70°C (158°F)Storage Temperature: -10°C (14°F) to 70°C (158°F)Service
Use the following list to direct troubleshooting questions or information on service and warranty.Phone - Toll Free Numbers
Outside Illinois 1-800-542-8665Inside Illinois 1-800-541-8665Canada 1-800-523-8665U.S. Mail
Caterpillar Service Technology Group
600 W. Washington Street, LD-180
East Peoria, IL 61630
Telex
Number 404435Attn: Caterpillar Service Technology Group Unit less than one year old will be repaired under warranty (except for abuse). The cost of out-of-warranty repairs will be charged to the owner. Contact Caterpillar Service Technology Group for details.Servicing the 3500 Spark Ignited Timing Control (Slave Configuration)
IntroductionThis Service Program Module (SPM) will allow a Timing Control configured to operate with an engine control (Slave Operation) to be reconfigured to operate independently (Standalone Operation) without an engine control present. The following service information is displayed with the SPM installed in the Digital Diagnostic Tool (DDT):Diagnostic Codes
*01 No Speed Sensor Signal (Open)*02 No Speed Sensor Signal (Short)*03 No Crank Ang