John Deere Electronic Fuel Injection Systems Ctm68 Technical Manual
- 📄 Product Data Sheet
- Manual Included:
- Component Technical Service Repair Manual: 320 Pages (approximate)
- Specifications:
- Brand: John Deere
- Model: Electronic Fuel Injection Systems (All JD Engines)
- Serial Number: All
- Type: Component Technical Manual (CTM)
- Manuals: Component Technical Service Repair Manual
- Publication Numbers: CTM68
- Language: English
- Format: PDF
John Deere Electronic Fuel Injection Systems Ctm68 Technical Manual
The manual is divided into shared information (Groups 00–10) and system-specific connector/diagnostic information (Groups 15–45, partially shown here with Groups 15–25 for Bosch, and Group 20 for Nippondenso).
Group 00—Safety
- (Page 00-1)
Group 02—General Information
- About This Manual (02-1)
- Engine Controller Serial Number Plate (02-1)
- Injection Pump Serial Number Plate (02-2)
- Glossary of Terms (02-3)
- System Power Requirements (02-5)
- Engine Controller Environmental Restrictions (02-5)
- Electrical Concepts (02-5)
- Using a Digital Multimeter (02-6)
- Use of a Diagnostic Reader (02-8)
Group 05—Fuel Injection System Components
- Major System Components (05-1)
- Engine Controller (05-1)
- Robert Bosch Injection Pump/Actuator Assembly (05-2)
- Nippondenso Injection Pump/Actuator Assembly (05-5)
- Auxiliary Speed Sensor (05-7)
- Transient Voltage Protection Module (TVP) (05-8)
Group 10—Basic System and Diagnostic Features
- How The Electronically-Controlled Fuel Injection System Works
- Description (10-1)
- Operation (10-2)
- Self-Diagnosis and Back-Up Features (10-2)
- Fault Lamp Operation (10-3)
- Governor Modes (10-4)
- Starting Control (10-5)
- Maximum Fuel Quantity Control (10-6)
- Smoke Control (10-7)
- Fuel Temperature Compensation (10-7)
- Fuel Flow/Throttle Output Signal (10-8)
- Auxiliary Speed Output Signal (10-8)
- Understanding the Throttle Options (10-9)
- Diagnostic Codes Operation (10-11)
- Using the Electronic Governor Tester — JT05829 (10-13)
- Listing of Diagnostic Codes (10-16)
Group 15—Robert Bosch Fuel System Connectors
- Engine Controller Connector (X1) (15-1)
- Auxiliary Speed Sensor Connector (X2) (15-4)
- Fuel Shut-Off Solenoid Connector (X11) (15-5)
- Actuator Connector (X12) (15-6)
- Fuel Temperature Sensor Connector (X13) (15-7)
- In-Line Connectors (X7, X8, X9, X10) (15-7)
- Service Connectors (X3, X4, X5, X6) (15-8)
- Using the Diagnostic Voltages Connector (X3) (15-8)
- Using the Diagnostic Reader Connector (X4) (15-12)
Group 20—Nippondenso Fuel System Connectors
- Engine Controller Connector (X1) (20-1)
- Auxiliary Speed Sensor Connector (X2) (20-4)
- Fuel Shut-Off Solenoid Connector (X10) (20-4)
- Actuator Connectors (X7, X9) (20-5)
- Fuel Temperature Sensor Connector (X8) (20-6)
- Service Connector — X3, X4, X5 (20-7)
- Using the Diagnostic Voltages Connector (X3) (20-7)
- Using the Diagnostic Reader Connector (X4) (20-11)
Group 25—Robert Bosch Fuel Injection System Diagnostic Procedures
- How to Start Troubleshooting a Problem (25-1)
- Troubleshooting Tools Needed (25-2)
- Troubleshooting Suggestions (25-2)
- Initial Operational Checks (25-6)
- Symptom-Only Procedures (25-11)
Notes from the Manual Introduction
The three component technical manuals that replace CTM11 are:
- CTM67 — OEM engine accessories (300/400/500/700 Series)
- CTM68 — Electronically controlled fuel injection systems (this manual)
- CTM77 — Alternators and starting motors
Shared information (Bosch & Nippondenso): Groups 00, 02, 05, 10
Unique information: Groups 15–45 (e.g., Group 15 = Bosch connectors; Group 20 = Nippondenso connectors)Connector naming: Previously “J” connectors are now “X” connectors (e.g., J1 → X1)
Would you like the remaining Groups (e.g., 30–45 for Bosch/Nippondenso diagnostics) or a comparison with CTM77 (alternators/starters) you previously viewed?
For complete service information also see:
John Deere PowerTech 6.8L 8.1L Diesel Engines CTM134 Manual
John Deere CTM255 Repair Manual
John Deere PowerTech 8.1L CTM243 Repair Manual