Caterpillar C7, C9 Truck Diesel Engine Troubleshooting Manual


Covers: Caterpillar C7 and C9 Truck Engines with serial numbers-

  • SRB
  • LFE
  • 9DG
  • YPG
  • NPH
  • ETK
  • KAL
  • LBM
  • CKP
  • SAP
  • LFR
  • C7T
  • WAX

Pages: 408
Compatibility: Windows/Mac/Tablet
Notes: Bookmarked, searchable, printable, instant download

The Caterpillar C7 and C9 truck diesel engine troubleshooting manual covers troubleshooting procedures and fault codes. In this manual you will find detailed step-by-step instructions and accurate illustrations to correctly diagnose the Cat C7 and C9 truck diesel engine. View this manual on your computer/tablet or print off pages as needed.

Topics in the Cat C7 and C9 Truck Engine Troubleshooting Manual:

Electronic Troubleshooting
System Overview
Electronic Service Tools
Replacing the ECM
Sensors and Electrical Connectors
Programming Parameters
Programming Parameters
Test ECM Mode
Customer Passwords
ECM Date/Time Stamped Information
ECM Snapshot
Factory Passwords
Flash Programming
Injector Trim File
Service Information Report
Customer Specified Parameters
Cruise Control Parameters
Data Link Parameters
Dedicated PTO Parameters
Engine/Gear Parameters
Engine Monitoring Parameters
Exhaust Brake Parameters
Idle Parameters
Input Selections
Maintenance Parameters
Output Selections
Selected Engine Rating
Smart Idle Parameters
Timer Parameters
Trip Parameters
Truck Manufacture Parameters
Vehicle Speed Parameters
System Configuration Parameters
System Configuration Parameters
Troubleshooting without a Diagnostic Code
Can Not Reach Top Engine RPM
Can Not Reach Vehicle Speed Limit
Check Engine Lamp or Warning Lamp Is
Cruise Control, Idle, or PTO Can Not Be Set
Driver Questionnaire
Driver Questionnaire Response
ECM Will Not Accept Factory Passwords
Electronic Service Tool Will Not Communicate with ECM
Elevated Idle
Engine Cranks but Will Not Start
Engine Cranks but Will Not Start
Engine Has Early Wear
Engine Misfires, Runs Rough or Is Unstable
Engine Vibration
Engine Will Not Crank
Excessive Black Smoke
Excessive Fuel Consumption
Excessive White Smoke
Intermittent Cruise Control, Idle, or PTO Kickout
Intermittent Engine Shutdown
Intermittent Low Power or Power Cutout
Low Power/Poor or No Response to Throttle
Poor Acceleration or Response
Troubleshooting with a Diagnostic Code
Diagnostic Codes
No Diagnostic Code Detected (55)
Diagnostic Functional Tests
5 Volt Engine Pressure Sensor Supply Circuit – Test
Accelerator Pedal (Throttle) Position Sensor Circuit – Test
Air Inlet Heater Circuit – Test
ATA (SAE J1587 / J1708) Data Link Circuit – Test
Change Oil Lamp Circuit – Test
Check Engine Lamp Circuit – Test
Clutch Pedal Position Switch Circuit – Test
Coolant Level Sensor Circuit – Test
Cooling Fan Circuit and A/C Compressor Clutch Circuit – Test
Cooling Fan Circuit and A/C High Pressure Switch Circuit – Test
Cruise Control Switch Circuit – Test
Diagnostic Enable Switch Circuit – Test
ECM Memory – Test
Electrical Connectors – Inspect
Engine Pressure Sensor Open or Short Circuit – Test
Engine Running Output Circuit – Test
Engine Speed/Timing Sensor Circuit – Test
Engine Temperature Sensor Open or Short Circuit – Test
Exhaust Brake Circuit – Test
Diesel Particulate Filter Circuit – Test
Fast Idle Enable Circuit – Test
Fast Idle Lamp Circuit – Test
Fuel Level Sensor Circuit – Test
Idle Shutdown Timer – Test
Ignore Brake/Clutch Switch Circuit – Test
Injection Actuation Pressure – Test
Injection Actuation Pressure Control Valve Circuit – Test
Injection Actuation Pressure Sensor – Test
Injector Solenoid Circuit – Test
Neutral Switch Circuit – Test
Powertrain Data Link Circuit – Test
PTO Engine RPM Set Speed (Input A and Input B) Circuit – Test
PTO Engine Shutdown Switch Circuit – Test
PTO Shutdown Timer – Test
PTO Switch Circuit – Test
PTO Switch ON Lamp Circuit – Test
Remote PTO Accelerator Position Sensor Circuit – Test
Service Brake Pedal Position (Switch 1) Circuit – Test
Service Brake Pedal Position (Switch 2) Circuit – Test
Starting Aid Output Circuit – Test
Tachometer Circuit – Test
Torque Limit Switch Circuit – Test
Transmission (AT/MT/HT) Relay Circuit – Test
Two Speed Axle Switch Circuit – Test
Vehicle Speed and Speedometer Circuit – Test
Wait To Start Lamp Circuit – Test
Warning Lamp Circuit – Test
Wastegate Solenoid – Test
Calibration Procedures
Engine Speed/Timing Sensor – Calibrate
Vehicle Speed Circuit – Calibrate


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