CM2150 Electronic Control System – 019-043   Engine Wiring Harness

General Information

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The engine uses three separate wiring harnesses to control the engine and some of the vehicle operations. Shown are the electronic control module (ECM) ports for the following connectors:

  1. 60-pin OEM harness connector.
  2. 60-pin Engine harness connector
  3. 4-pin OEM power supply harness connector
 
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Preparatory Steps

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 WARNING 

Batteries can emit explosive gases. To reduce the possibility of personal injury, always ventilate the compartment before servicing the batteries. To reduce the possibility of arcing, remove the negative (-) battery cable first and attach the negative (-) battery cable last.
  • Disconnect the battery cables. Refer to Procedure 013-009 in the ISB Series 6.7L Engines (CM2100 and CM2150 Common Rail Fuel Systems) Service Manual, Bulletin 4021578, or the ISC and ISL CM2150 Service Manual, Bulletin 4021569.
 
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Remove

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Disconnect the engine harness from the sensors and switches.

  • Intake manifold pressure sensor
  • Intake manifold air temperature sensor
  • Engine and camshaft position sensor
  • Engine coolant temperature sensor
  • Fuel pump actuator
  • Engine oil pressure sensor
  • Water-in-fuel sensor
  • Turbocharger speed sensor
  • Rail fuel pressure sensor
  • Exhaust gas recirculation (EGR) differential pressure sensor
  • Exhaust pressure sensor
  • EGR temperature sensor
  • Fuel lift pump
  • Variable geometry turbocharger (VGT) actuator
  • EGR valve
  • Crankcase pressure sensor.

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Remove the harness wire ties from the harness support bracket.

Disconnect the engine harness connector from the ECM.

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Inspect for Reuse

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Replace or repair the engine harness if there is an open circuit or a short circuit found under the protective covering of the harness body.

 
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Install

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Connect the engine harness to the ECM.

Torque Value:  3  n.m  [27 in-lb]

Install the harness clamps that hold the engine harness to the block.

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Connect the sensors and switches to the engine harness.

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Finishing Steps

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 WARNING 

Batteries can emit explosive gases. To reduce the possibility of personal injury, always ventilate the compartment before servicing the batteries. To reduce the possibility of arcing, remove the negative (-) battery cable first and attach the negative (-) battery cable last.
  • Connect the battery cables. Refer to Procedure 013-009 in the ISB Series 6.7L Engines (CM2100 and CM2150 Common Rail Fuel Systems) Service Manual, Bulletin 4021578, or the ISC and ISL CM2150 Service Manual, Bulletin 4021569.
 
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Last Modified:  03-Jan-2007