Detroit DDEC II Troubleshooting Manual & Wiring

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Covers: Detroit DDEC II Troubleshooting, 1988
Pages: 499
Format: PDF (zipped)
Compatibility: Windows/Mac computers

This manual provides instruction for troubleshooting the Detroit Electronic Controlled (DDEC) engines. Specifically covered in this manual are troubleshooting and repair steps that apply to the DDEC II systems.

The following is a list of topics contained in the DDEC II Troubleshooting Manual:

SECTION 1. HOW TO USE THIS BOOK

SECTION 2. BASIC KNOWLEDGE REQUIRED
A. Electrical Circuits
B. Use of Digital Volt-Ohm Meter
C. Important Information
D. Explanation of Abbreviations/Terms
E. General Diagnostic Information

SECTION 3 . TESTING THE DDEC II SYSTEM
A. Tools Needed to Diagnose the System
B . Differences Between DDEC II and DDEC I
C. Reading the Diagnostic Codes
1. Active vs . Historical Codes
2. Using the ” Check Engine” Light
3. Using the Diagnostic Data Reader
D. Clearing Codes
E. EEPROM Reprogramming
F. Connector Checkout

SECTION 4. TROUBLESHOOTING CHARTS
A. The Diagnostic Procedure – Where to Start
B. Diagnostic Codes – What They Mean
C . Beginning Charts
Start First Chart for Diagnosis of DDEC II Using DDR
CEL First Chart for Diagnosis of DDEC II When No DDR is Available
D. Troubleshooting Charts
Chart 1 Intermittent Code Or Symptom And No Codes
Chart 2 Engine Cranks But Will Not Start
Chart 3 Poor Performance And No Codes
Chart 4 No “Check Engine” Light During Bulb Check
Chart 5 ” Check Engine ” Light Always On And Code 25 On DDR
Chart 6 ” Check Engine” Light Always On , No Data Link And Won ‘t Flash Codes
Chart 7 – No Data Link And Bulb Check Okay
Chart 8 – ” Stop Engine” Light Always On And Code 25 On DDR
Chart 9 – No ” Stop Engine ” Light During Bulb Check
Chart 1 0 – Stop Engine Override Inoperative
Chart 11 – Power Take-Off Speed Adjust Inoperative
Chart 12 – Cruise Control Inoperative
Chart 13 – ” Cruise Active” Light Always On
Chart 14 – “Cruise Active ” Light Never On
Chart 15 – Idle Shut-Down Feature Always On
Chart 16 – Idle Shut-Down Feature Inoperative
Chart 1 7 – Engine Brake Always Enabled
Chart 18 – Engine Brake Inoperative
Chart 19 – Power Control Input Inoperative (Throttle Inhibit and Auxiliary Engine Protection)
Chart 20 – Two Speed Governor Switch Inoperative
Chart 21 – Throttle Inhibit Always On
E. Diagnostic Code Charts
Code 11 – Power Take-Off Speed Adjust (PTOSA) Signal Voltage Low
Code 12 – Power Take-Off Speed Adjust (PTOSA) Signal Voltage High
Code 13 – Coolant Level Sensor (CLS) Signal Voltage Low
Code 14 – Oil or Coolant Temperature Sensor (OTS or CTS) Signal Voltage High
Code 1 5 – Oil or Coolant Temperature Sensor (OTS or CTS) Signal Voltage Low
Code 16 – Coolant Level Sensor (CLS) Signal Voltage High
Code 21 – Throttle Position Sensor (TPS) Signal Voltage High
Code 22 – Throttle Position Sensor (TPS) Signal Voltage Low
Code 23 – Fuel Temperature Sensor (FTS) Signal Voltage High
Code 24 – Fuel Temperature Sensor (FTS) Signal Voltage Low
Code 25 – No Codes
Code 26 – Power Control Switch
Code 31 – Fault On Auxiliary Output
Code 32 – ECM Backup System Failure
Code 33 – Turbo Boost Sensor (TBS) Signal Voltage High
Code 34 – Turbo Boost Sensor (TBS) Signal Voltage Low
Code 35 – Oil Pressure Sensor (OPS) Signal Voltage High
Code 36 – Oil Pressure Sensor (OPS) Signal Voltage Low
Code 41 – Timing Reference Sensor (TRS)
Code 42 – Synchronous Reference Sensor (SRS)
Code 43 – Low Coolant
Code 44 – Oil or Coolant Overtemperature
Code 45 – Low Oil Pressure
Code 46 – Low Battery Voltage
Code 47 – Fuel Pressure Sensor (FPS) Signal Voltage High
Code 48 – Fuel Pressure Sensor (FPS) Signal Voltage Low
Code 51 – EEPROM Error
Code 52 – ECM-Analog to Digital Failure
Code 53 – EEPROM Failure Affecting Code Logging
Code 54 – Vehicle Speed Sensor
Code 55 – Proprietary Communication Link Failure
Code 56 – ECM – Analog to Digital Failure
Code 58 – Cruise Control Switches
Codes 6X (X= 1 to 8) – Injector Response Time Too Long
Codes 7X (X= 1 to 8) – Injector Response Time Too Short
Code 85 – Engine Overspeed
ENG5V – Engine Harness + 5 Volt Supply
VEH5V – Vehicle Harness + 5 Volt Supply
Wiring Diagrams

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