3456 Engine for Caterpillar Built Machines Sensors and Electrical Connectors Caterpillar


Sensors and Electrical Connectors
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Table 1
Electrical connectors    
Jack/Plug     Component    
J1/P1     ECM connector    
J2/P2     ECM connector    
J3/P3     Machine connector    
J20/P20     Primary engine speed/timing sensor    
J21/P21     Coolant temperature sensor    
J22/P22     Engine oil pressure sensor    
J23/P23     Turbocharger outlet pressure sensor    
J26/P26     Timing calibration (TC) probe connector    
J27/P27     Atmospheric pressure sensor    
J42     Service tool connector    
J43/P43     Fuel temperature sensor    
J44/P44     Secondary engine speed/timing sensor    
J87/P87     Throttle backup switch    
J89/P89     Intake manifold air temperature sensor    
J91/P91     MEUI connector    
J118/P118     Throttle switch    



Illustration 1g00724464

ECM connector




Illustration 2g00898045

Diagram of components




Illustration 3g00988128

Sensor locations

Information System:

312C and 312C L Excavator VA Boom Controls
345B Series II Excavator Hydraulic System SmartBoom Hydraulic System
3456 Engine for Caterpillar Built Machines E039 Low Engine Oil Pressure Derate
312C and 312C L Excavator Specifications
325C Excavator Machine System Specifications Bucket
Quick Coupler Wedge Lock(Wheel Loader) Operating Technique Information
315C Excavator Window (Front)
3456 Engine for Caterpillar Built Machines System Configuration Parameters
5130B Excavator Lifting the Boom
312C and 312C L Excavator Lifting Capacities - 312C with a VA Boom
312C and 312C L Excavator Air Inlet Heater Starting Aid
325C Excavator Machine System Specifications Bucket
416D, 420D, 424D, 428D, 430D, 432D, 438D and 442D Backhoe Loaders Hydraulic and Steering System Control Valve (Boom) (Mechanically Operated)
416D, 420D, 424D, 428D, 430D, 432D, 438D and 442D Backhoe Loaders Hydraulic and Steering System Control Valve (Stick) (Mechanically Operated)
416D, 420D, 424D, 428D, 430D, 432D, 438D and 442D Backhoe Loaders Hydraulic and Steering System Control Valve (Swing) (Mechanically Operated)
416D, 420D, 424D, 428D, 432D and 442D Backhoe Loaders Hydraulic and Steering System Control Valve (Stick) (Pilot Operated)
416D, 420D, 424D, 428D, 432D and 442D Backhoe Loaders Hydraulic and Steering System Control Valve (Swing) (Pilot Operated)
305 CR Mini Hydraulic Excavator Joystick Controls Alternate Patterns
2001/10/01 Correction to Special Instruction , "Rebuilding the Backhoe Loader Pin Bores" {6101, 6104, 6119, 6501, 6502, 6503, 6506, 6508, 6515, 6518, 6533, 7054, 7222}
365B, 365B Series II and 365BL Excavators Radiator Core - Clean
3046 Engine for Caterpillar Built Machines Engine Oil Cooler - Inspect
312C Excavator Machine Systems Tank and Filter (Hydraulic) - Install
Quick Coupler Wedge Lock(Wheel Loader) Approved Machines
BH27, BH30 and BH30 W Skid Steer Loader Backhoes Stick Cylinder - Remove and Install