CM871 and CM876 Electronic Control Systems, ISX and ISM Engines – 100-002   Engine Diagrams

Engine Views

The following illustrations show the location of the major external engine components, filters, and other service and maintenance points. Some external components will be at different locations for different engine models.

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ISX with CM871 – Front View

1. Engine coolant temperature sensor
2. Crankcase pressure sensor
3. Alternator
4. Variable geometry turbocharger
5. Compressor inlet air temperature sensor
6. Variable geometry turbocharger actuator.

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ISX with CM871 – Exhaust Side

1. Variable geometry turbocharger
2. Turbocharger speed sensor (rear of turbocharger)
3. Variable geometry turbocharger actuator
4. Exhaust gas pressure sensor
5. Engine coolant temperature sensor
6. Compressor inlet temperature sensor
7. Aftertreatment fuel injector.

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ISX with CM871 – Rear View

1. Exhaust gas recirculation temperature sensor
2. Variable geometry turbocharger actuator
3. Turbocharger speed sensor
4. Aftertreatment fuel injector
5. Exhaust gas recirculation differential pressure tubes.

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ISX with CM871 – Intake Side

1. Electronic control module (ECM)
2. Exhaust gas recirculation differential pressure sensor
3. Intake manifold temperature/pressure sensor
4. Timing actuators
5. Exhaust gas recirculation temperature sensor
6. Exhaust gas recirculation valve motor
7. Exhaust gas recirculation valve
8. Electric lift pump
9. Engine oil pressure sensor
10. Engine oil temperature sensor
11. Fueling actuators
12. Aftertreatment fuel pressure sensor
13. Aftertreatment fuel shutoff valve
14. Engine speed/position sensor
15. Ambient air pressure sensor (tied to wiring harness)
16. Crankcase pressure sensor
17. Engine harness wiring connector.

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ISX with CM871 – Top View

1. Engine coolant temperature sensor
2. Exhaust gas pressure sensor
3. Variable geometry turbocharger actuator
4. Aftertreatment fuel injector
5. Camshaft speed sensor
6. Exhaust gas recirculation temperature sensor
7. Intake manifold temperature/pressure sensor
8. Exhaust gas recirculation differential pressure sensor.

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ISX Fuel Delivery Housing – Front View

1. Priming bypass valve (internal)
2. 320-psi pressure regulator
3. 36-micron filter screen
4. Fuel inlet
5. Quick disconnect pressure tap – suction side
6. Water-In-Fuel sensor
7. 250-psi pressure regulator
8. Fuel shutoff valve
9. Quick disconnect pressure tap – pressure side
10. Fuel pressure sensor
11. Front fueling actuator
12. Front timing actuator
13. Rear timing actuator
14. Rear fueling actuator.

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ISM with CM876 – Front View

1. Engine coolant temperature sensor
2. Variable geometry turbocharger
3. Variable geometry turbocharger actuator.

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ISM with CM876 – Exhaust Side

1. Exhaust gas recirculation valve motor
2. Exhaust gas recirculation temperature sensor
3. Intake manifold temperature/pressure sensor
4. Exhaust gas pressure sensor
5. Exhaust gas recirculation differential pressure sensor
6. Compressor inlet temperature sensor
7. Variable geometry turbocharger actuator
8. Aftertreatment fuel injector
9. Exhaust gas recirculation valve.

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ISM with CM876 – Rear View

1. Exhaust gas recirculation temperature sensor
2. Exhaust gas recirculation valve motor
3. Exhaust gas recirculation valve
4. Variable geometry turbocharger actuator
5. Variable geometry turbocharger
6. Aftertreatment fuel injector
7. Aftertreatment fuel pressure sensor
8. Aftertreatment fuel shutoff valve.

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ISM with CM876 – Intake Side

1. Exhaust gas recirculation differential pressure sensor
2. Exhaust gas pressure sensor
3. Exhaust gas recirculation temperature sensor
4. Exhaust gas recirculation valve motor
5. Electronic control module
6. Aftertreatment fuel shutoff valve
7. Aftertreatment fuel pressure sensor
8. Engine oil temperature sensor (behind ECM cooling plate)
9. Engine wiring harness
10. Fuel shutoff valve
11. Fuel pump
12. Engine oil pressure sensor
13. Secondary engine position sensor 2
14. Primary engine position sensor 1
15. Crankcase pressure sensor.

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ISM with CM876 – Top View

1. Exhaust gas recirculation differential pressure sensor
2. Compressor inlet temperature sensor
3. Variable geometry turbocharger actuator
4. Exhaust gas pressure sensor
5. Exhaust gas recirculation temperature sensor
6. Intake manifold temperature/pressure sensor
7. Exhaust gas recirculation valve motor
8. Aftertreatment fuel pressure sensor
9. Aftertreatment fuel shutoff valve
10. Crankcase pressure sensor.

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ISX and ISM Aftertreatment System

1. Aftertreatment diesel oxidation catalyst inlet temperature sensor
2. Aftertreatment diesel particulate filter differential pressure sensor
3. Aftertreatment diesel particulate filter inlet temperature sensor
4. Aftertreatment diesel particulate filter outlet temperature sensor
5. Aftertreatment outlet section
6. Aftertreatment diesel particulate filter
7. Aftertreatment particulate filter differential pressure tubes
8. Aftertreatment diesel oxidation catalyst
9. Aftertreatment Inlet section.