Cummins Signature ISX CM870 ECM Diagnostic Manual Download
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This manual contains instructions for troubleshooting and repairing the Cummins Signature, ISX CM870 ELECTRONIC CONTROL SYSTEM. Fault code troubleshooting and Signature/ISX CM870 color wiring diagram are included.
Topic list:
Introduction
Engine and System Identification
Engine Identification
Engine Diagrams
Familiarization
System Description
Service Tools and Hardware – Overview
Electronic Engine Controls – Overview
Air Intake System – Overview
Troubleshooting Fault Codes
Electronic Control Module (ECM) Microprocessor
Intake Manifold Pressure Sensor Circuit
Intake Manifold Pressure Sensor Circuit
Accelerator Pedal Position Sensor Circuit
Accelerator Pedal Position Sensor Circuit
Remote Accelerator Pedal or Lever Position Sensor Circuit
Remote Accelerator Pedal or Lever Position Sensor Circuit
Engine Oil Pressure Sensor Circuit
Engine Oil Pressure Sensor Circuit
Engine Oil Pressure Low – Warning
Coolant Temperature Sensor Circuit – Voltage Above Normal or Shorted to High Source
Coolant Temperature Sensor Circuit – Voltage Below Normal or Shorted to Low Source
Engine Coolant Temperature High – Critical
Intake Manifold Air Temperature Sensor Circuit – Voltage Above Normal or Shorted to High Source
Intake Manifold Air Temperature Sensor Circuit – Voltage Below Normal or Shorted to Low Source
Intake Manifold Air Temperature High – Critical
Sensor Supply Voltage Number 2 Circuit
Engine Coolant Level Sensor Circuit Choice
Engine Coolant Level Sensor Circuit
Engine Coolant Level Sensor Circuit
Engine Coolant Level Sensor Circuit Choice
Engine Coolant Level Sensor Circuit
Engine Coolant Level Sensor Circuit
Engine Coolant Level Low – Warning
Oil Temperature Sensor Circuit – Voltage Above Normal or Shorted to High Source
Oil Temperature Sensor Circuit – Voltage Below Normal or Shorted to Low Source
Engine Oil Temperature high – Critical
Centinel™ Oil Tank Level Low – Warning
Barometric Pressure Sensor Circuit
Barometric Pressure Sensor Circuit
Centinel™ Oil Control Valve Circuit
Centinel™ Oil Control Valve Circuit
Sensor Supply Voltage Number 2 Circuit
Engine Overspeed
Vehicle Speed Sensor Circuit
Vehicle Speed Sensor Circuit
Fan Control Circuit
Ambient Air Temperature Sensor Circuit
Fuel Shutoff Valve Circuit
Fuel Shutoff Valve Circuit
Ambient Air Temperature Sensor Circuit
Fuel Shutoff Valve
Engine Fuel Temperature Sensor Circuit – Voltage Above Normal or Shorted to High Source
Engine Fuel Temperature Sensor Circuit – Voltage Below Normal or Shorted to Low Source
Engine Speed Sensor Supply Voltage Circuit
SAE J1939 Data Link Multiplexing
SAE J1939 Data Link Multiplexing
SAE J1939 Data Link Multiplexing Accelerator Pedal Sensor
SAE J1939 Data Link Multiplexing Remote Accelerator
Barometric Pressure Sensor Circuit
Real Time Clock Power Circuit
Idle Shutdown Vehicle Accessories Relay Circuit
Idle Shutdown Vehicle Accessories Relay Circuit
Unswitched Battery Supply Circuit
ECM Power Supply Error
Sensor Supply Voltage Number 1 Circuit
Sensor Supply Voltage Number 1 Circuit
Accelerator Pedal Position Sensor Supply Voltage Circuit
Engine Oil Pressure Low – Critical
Water-In-Fuel Indicator High – Maintenance
SAE J1939 Data link Circuit Error
Water-In-Fuel Sensor Circuit – Voltage Above Normal or Shorted to High Source
Water-In-Fuel Sensor Circuit – Voltage Below Normal or Shorted to Low Source
Idle Validation Switch Choice
Idle Validation Switch Circuit – Non-Integrated Switch and Sensor Type
Idle Validation Switch Circuit – Non-Integrated Switch and Sensor Type
Idle Validation Switch Circuit – Solid State Switch and Sensor Type
Accelerator Pedal Idle Validation Circuit
Intake Manifold Pressure Sensor Circuit
Unswitched Battery Supply Circuit
Engine Oil Pressure Sensor Circuit
Accelerator Pedal Position Sensor Supply Voltage Circuit
High Fuel Pressure
Low Fuel Pressure
Low Fuel Pressure
Rail Fuel Pressure Sensor Circuit
Rail Fuel Pressure Sensor Circuit
Idle Validation Switch Choice
Idle Validation Switch Circuit – Integrated Switch and Sensor Type
Idle Validation Switch Circuit – Non-Integrated Switch and Sensor Type
Idle Validation Switch Circuit – Solid State Switch and Sensor Type
Fuel System Underfueling
Starter Relay Circuit
Starter Relay Circuit
Turbocharger Speed Sensor
Battery Voltage Monitor – High Voltage
Voltage Monitor – Low Voltage
Battery Voltage Monitor – Very Low Voltage
Engine Requires Lubricating Oil and Filter Change – Maintenance
Turbocharger Speed Low
Engine Speed Sensor Circuit
Turbocharger Number 1 Compressor Inlet Temperature Sensor Circuit – Voltage Above Normal or Shorted to High Source
Turbocharger Number 1 Compressor Inlet Air Temperature Sensor Circuit – Voltage Below Normal or Shorted to Low Source
Engine Speed Sensor and Camshaft Position Sensor Circuit
Camshaft Position Sensor Circuit
Adaptive Cruise Control Circuit
Cylinder Power Imbalance
Engine Coolant Temperature – Data Valid but Above Normal Operating Range – Moderately Severe Level
EGR Valve Position Sensor Circuit
Ambient Air Density – Data Valid But Below Normal Operational Range – Least Severe Level
Fuel Pump Delivery Pressure – Data Valid But Below Normal Operating Range – Moderately Severe Level
EGR Valve Position Sensor Circuit
EGR Valve Position Circuit – Voltage Below Normal or Shorted to Low Source
EGR Differential Pressure Sensor Circuit
EGR Valve Differential Pressure Sensor Circuit
Variable Geometry Turbocharger Output Device Driver – Shorted High
Turbocharger Control Valve Circuit
Front Fueling Actuator Circuit
Front Timing Actuator Circuit
Rear Fueling Actuator Circuit
Rear Timing Actuator Circuit
Engine Speed/Position Sensor Number 1 – Engine Speed/Position Glitch
Turbocharger Turbine Inlet Temperature (Calculated
Turbocharger Compressor Outlet Air Temperature (Calculated
EGR Valve Self Calibration
Exhaust Gas Recirculation (EGR
Exhaust Gas Recirculation (EGR
Exhaust Gas Recirculation (EGR
Exhaust Gas Recirculation (EGR
Turbocharger Control Shutoff Valve Circuit
Turbocharger Control Shutoff Valve Circuit
Exhaust Gas Recirculation (EGR
EGR Differential Pressure Sensor – Data Valid but Above Normal Operating Range – Moderately Severe Level
Engine Brake Solenoid 1 Signal Circuit
Engine Brake Solenoid 2 Signal Circuit
Engine Brake Solenoid 3 Signal Circuit
Engine Brake Solenoid 1 Signal Circuit Choice
Engine Brake Solenoid 1 Software Older than 05040408
Engine Brake Solenoid 1 Software 05040408 or Newer
Engine Brake Solenoid 2 Signal Circuit Choice
Engine Brake Solenoid 2 Software Older than 05040408
Engine Brake Solenoid 2 Software 05040408 or Newer
Engine Brake Solenoid 3 Signal Circuit
Fuel Filter Restriction Moderately High – Warning
Exhaust Gas Pressure Sensor Circuit
Exhaust Gas Pressure Sensor Circuit
Recirculated Exhaust Gas Temperature Sensor Circuit – Voltage Above Normal or Shorted to High Source
EGR Gas Temperature – Voltage Below Normal or Shorted to Low Source
Fan Control Circuit
Variable Geometry Turbocharger Actuator Driver Circuit – Voltage Below Normal or Shorted to Low Source
Variable Geometry Turbocharger Actuator Driver Circuit – Voltage Above Normal or Shorted to High Source
Fuel System Overfueling
Fuel System Overfueling
Exhaust Pressure Sensor Circuit Data Invalid
EGR Temperature Sensor Circuit
EGR Temperature Sensor Circuit
Engine Coolant Temperature High – Warning
Intake Manifold Air Temperature High – Warning
Intake Manifold Pressure
EGR Valve Actuator Over Temperature
Troubleshooting Symptoms
Troubleshooting Procedures and Techniques
Troubleshooting Symptom Charts
Communication Error – Electronic Service Tool or Control Device
Engine Decelerates Slowly
Engine Fan Does Not Operate, Operates Erratically, or Operates Continuously
Engine Will Not Shut Off
Fault Code Warning Lamps Stay On (No Apparent Reason)
Fault Code Warning Lamps Do Not Illuminate
Fuel Consumption Excessive
PTO or Cruise Control Does Not Operate
Troubleshooting Symptoms (New Format)
ECM – No Communication Troubleshooting Tree
Engine Performance Troubleshooting Tree
Fuel Economy Troubleshooting Tree
Electronic Engine Controls
Service Tools
Barometric Air Pressure Sensor
Battery Ground Circuit
Clutch Pedal Position Switch
Clutch Pedal Position Switch Circuit
Engine Coolant Level Sensor
Engine Coolant Temperature Sensor
Cruise Control or PTO ON/OFF Switch
Cruise Control or PTO ON/OFF Switch Circuit
Cruise Control or PTO Set/Resume Select Switch
Cruise Control or PTO Set/Resume Select Switch Circuit
Diagnostic Test Mode Switch
Diagnostic Test Mode Switch Circuit
Electronic Control Module (ECM
ECM Calibration Code
Engine Brake ON/OFF Switch
Engine Brake ON/OFF Switch Circuit
Engine Brake Selector Switch
Engine Speed Sensor (ESS
Engine Wiring Harness
Fan Clutch Circuit
Fault Lamp
Fault Lamp Circuit
Fuel Shutoff Valve Circuit
Fuel Shutoff Valve Solenoid
Idle Adjust Switch
Idle Adjust Switch Circuit
Idle Validation Switch
Intake Manifold Air Temperature Sensor
Intake Manifold Pressure Sensor
Key Switch Battery Supply Circuit
Engine Oil Pressure Sensor
Engine Oil Temperature Sensor
Wiring Harness
Programmable Features and Parameters Not Correct
Remote PTO Switch Circuit
Remote PTO Switch
Tachometer Circuit
Accelerator Pedal or Lever Position Sensor
Accelerator Pedal or Lever Position Sensor Circuit
Unswitched Battery Supply Circuit
Brake Pedal Position Switch
Brake Pedal Position Switch Circuit
Vehicle Speed Sensor, Digital Input
Vehicle Speed Sensor, Magnetic Pick Up
Vehicle Speed Sensor Circuit
Fueling Actuator
Timing Actuator
Rail Fuel Pressure Sensor
Engine Fuel Temperature Sensor
Water In Fuel Sensor
Engine Brake Harness
Data Link Circuit, SAE J1939
Data Link Circuit, SAE J1587
Ring Terminal
Fuse, Harness In-Line
Connector, Butt Splice
Weather Pak Connector Series
Metripack Connector Series
AMP Connector Series
Deutsch™ DRC Connector Series
Deutsch™ DT Connector Series
Deutsch™ DTM and DTP Connector Series
Deutsch™ HD10 Connector Series
Deutsch™ HDP20 and HD30 Connector Series
ITT Cannon Connector Series
AMP VP44 Connector Series
Packard Relay Connector
Ford™ Connector Series
D-Sub Miniature Connector Series
Bosch™ Actuator and Sensor Connector Series
Bosch™ ECM Injector Driver Connector Series
Bosch™ ECM Actuator and Sensor Connector Series
Bosch™ ECM Connector Series
Framatome Connector Series
Air Conditioning Pressure Switch
Air Conditioning Pressure Switch Circuit
Accelerator Interlock Switch
Accelerator Interlock Switch Circuit
Real-Time Clock Battery Backup Module
Engine Protection Override Switch
Engine Protection Override Switch Circuit
Remote Accelerator Switch
Remote Accelerator Switch Circuit
Torque Limit Control Switch
Torque Limit Control Switch Circuit
Multimeter Usage
Resistance Measurement Using a Multimeter and a Wiring Diagram
Component Connector and Pin Inspection
Inactive or Intermittent Fault Code
Camshaft Position Sensor
Governor Type Switch
Governor Type Switch Circuit
EGR Valve Differential Pressure Sensor
EGR Valve Position Sensor
Exhaust Gas Pressure Sensor
Recirculated Exhaust Gas Temperature Sensor
Fan Control Switch
Fan Control Switch Circuit
Maximum Engine Speed Switch
Maximum Engine Speed Switch Circuit
Turbocharger Control Shutoff Valve
Turbocharger Control Valve
Turbocharger Speed Sensor
Turbocharger Compressor Intake Air Temperature Sensor
Fuel Lift Pump
Fuel Lift Pump Circuit
ECM ROM Boot
Engine Datalinks
Bosch™ Aftertreatment DEF Controller Connector
Specifications
Covers: Cummins CM870 Electronic Control System for Signature, ISX Engines
Pages: 1,762
Format: PDF files (zipped)
File size: 43mb
Compatibility: Windows/Mac computers
Notes: 2007 publication. Instant digital download only – no printed copy or CD-ROM media.
