Connector Contact Description
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450E Backhoe Loader Machine Electronic Control System
[UENR0273]
450E Backhoe Loader Machine Electronic Control System
Features
450E Backhoe Loader Machine Electronic Control System
Symptom Troubleshooting
ELECTRICAL AND STARTING SYSTEM
WIRING GP
450E Backhoe Loader Machine Electronic Control System
MID 039 - CID 0191 - FMI 02
450E Backhoe Loader Machine Electronic Control System
MID 039 - CID 0600 - FMI 04
450E Backhoe Loader Machine Electronic Control System
MID 039 - CID 0600 - FMI 03
450E Backhoe Loader Machine Electronic Control System
MID 039 - CID 0490 - FMI 03
450E Backhoe Loader Machine Electronic Control System
MID 039 - CID 0368 - FMI 03
450E Backhoe Loader Machine Electronic Control System
MID 039 - CID 0490 - FMI 04
450E Backhoe Loader Machine Electronic Control System
MID 039 - CID 0368 - FMI 04
1.1. Connector Contact Numbers
2.1. Machine ECM
Connector Contact Numbers
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| Illustration 1 | g00554751 |
Electronic Control Module (ECM) | |
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| Illustration 2 | g00556522 |
Machine Harness Connectors J1 and J2 that mate to the ECM. | |
Machine ECM
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| The Contact Description for the Machine ECM (Connector "J1") (1) | ||
|---|---|---|
| No. | Function | Type |
| 1 | Key Switch ON | Key Switch ON |
| 2 | Speed Sensor (Transmission Output +) | Frequency |
| 3 | Speed Sensor (Transmission Output -) | Frequency |
| 10 | Cat Data Link + | Input/Output |
| 13 | Ground | Battery - |
| 14 | Backlight Input | Driver |
| 20 | Cat Data Link - | Input/Output |
| 21 | 5 V Sensor Return | Analog Sensor Return |
| 23 | Machine Ground | Battery - |
| 26 | Switch (Auto/Manual) - Auto | Switch to Ground |
| 27 | Switch (Auto/Manual) - Manual | Switch to Ground |
| 28 | Switch (Operator Present) (Operator is in the Seat) | Switch to Ground |
| 29 | Temperature Sensor (Hydraulic Oil) | Analog |
| 33 | Switch (Stabilizer Lever Position) | Switch to Ground |
| 34 | Quick Coupler Pins - Engage | Switch to Ground |
| 35 | Quick Coupler Pins - Disengage | Switch to Ground |
| 38 | Unswitched Battery | + Battery |
| 39 | Unswitched Battery | + Battery |
| 40 | Switch (Continuous Flow) | Switch to Ground |
| 41 | Switch (Ride Control) | Switch to Ground |
| 42 | Park Brake - Engaged | Switch to Ground |
| 43 | Switch (Transmission Lock) | Switch to Ground |
| 44 | 8 V Sensor Power | Power |
| 45 | 8 V Sensor Return | Return |
| 48 | Solenoid (Forward Clutch 1) | PWM driver |
| 49 | Solenoid (Reverse Clutch 2) | PWM driver |
| 50 | Clutch Return | PWM Driver Return |
| 51 | Solenoid 1 (Loader Auxiliary Valve) | PWM driver |
| 52 | Solenoid 2 (Loader Auxiliary Valve) | PWM driver |
| 57 | Machine Ground | -Battery |
| 58 | Solenoid 1 (Hoe Auxiliary Valve 1) | PWM driver |
| 59 | Solenoid 2 (Hoe Auxiliary Valve 1) | PWM driver |
| 60 | Auxiliary Hydraulic Return | PWM Driver Return |
| 61 | Solenoid 1 (Hoe Auxiliary Valve 2) | PWM driver |
| 62 | Solenoid 2 (Hoe Auxiliary Valve 2) | PWM driver |
| 63 | Switch (Implement Lockout) - Not Locked | Switch to Ground |
| 64 | Switch (Implement Lockout) - Locked | Switch to Ground |
| 69 | 10 V Power Supply | Power |
| 70 | Machine Ground (10 V Return) | -Battery |
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| ( 1 ) | "J1" is a 70 pin connector. |
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| Contact Description for the Machine ECM (Connector "J2") (1) | ||
|---|---|---|
| No. | Function | Type |
| 1 | Fwd/Rev Parity/Autoshift | +Battery |
| 2 | Solenoid (Fwd High Clutch) | PWM Driver |
| 3 | Solenoid (Stabilizer Detent) | On/Off Driver |
| 4 | Feature Alarm | PWM |
| 5 | Transmission Clutch (Speed 1) | On/Off Driver |
| 6 | Transmission Clutch (Speed 2) | On/Off Driver |
| 7 | Transmission Clutch (Speed 3) | On/Off Driver |
| 9 | Ride Control Relay | On/Off Driver |
| 10 | Action Lamp | Driver |
| 11 | Implement Enable Lamp | Driver |
| 12 | Action Alarm/Stabilizer | Driver |
| 13 | Backup Alarm Lamp | Driver |
| 14 | Alternator R Terminal | R-Terminal |
| 15 | Position Sensor (Boom Cylinder) | PWM |
| 16 | Position Sensor (Stick Cylinder) | PWM |
| 17 | Position Sensor (Bucket Cylinder) | PWM |
| 18 | Position Sensor (E- Stick Cylinder) | PWM |
| 19 | Hydraulic Filter Bypass | Driver |
| 20 | Torque Limiter Relay | Driver |
| 21 | Hydraulic Over Temp Lamp | Driver |
| 23 | Switch (Hydraulic Oil Filter Bypass) | Switch to Ground |
| 24 | Loader Auxiliary - Thumb Roller | Switch to Ground/PWM |
| 25 | LH Joystick Roller (Eighth Function) | Switch to Ground/PWM |
| 26 | Shuttle Forward | Frequency |
| 27 | Shuttle Reverse | Frequency |
| 28 | Switch (Engine Oil Pressure) | Switch to Ground |
| 29 | Switch (Engine Coolant Temperature) | Switch to Ground |
| 31 | Air Inlet Restrict | Switch to Ground |
| 32 | Position Sensor (Swing) | Switch to Ground/PWM |
| 36 | Water In Fuel Sensor (Lamp) | Switch to Ground |
| 37 | Switch (Continuous Flow) - Normally Closed | Switch to Ground |
| 41 | RH Joystick Slider (Seventh Function) | Switch to Ground/PWM |
| 46 | Switch (Ride Control Auto) | Switch to Ground |
| 47 | Switch (Transmission Lock) - Locked | Switch to Ground |
| 54 | Switch (Boom Lowered) | Switch to Ground |
| 67 | CAN A+ | Input/Output |
| 68 | CAN A- | Input/Output |
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| ( 1 ) | "J2" is a 70 pin connector. |
Information System:
450E Backhoe Loader Machine Electronic Control System
Features
450E Backhoe Loader Machine Electronic Control System
Electrical Input Components
450E Backhoe Loader Machine Electronic Control System
General Information
450E Backhoe Loader Machine Electronic Control System
Hydraulic System
450E Backhoe Loader Machine Electronic Control System
Operational Checks (Axle, Differential)
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Monitoring System
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Operator Controls
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Pilot Valve (Auxiliary) - Install
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Pilot Valve (Auxiliary) - Remove
450E Backhoe Loader Machine Electronic Control System
Connector Locations
450E Backhoe Loader Machine Electronic Control System
Transmission - Autoshift
450E Backhoe Loader Machine Electronic Control System
Symptom Troubleshooting
450E Backhoe Loader Machine Electronic Control System
Operational Checks (Brake System)
450E Backhoe Loader Machine Electronic Control System
Electronic Control Module (ECM) - Configure
450E Backhoe Loader Machine Electronic Control System
Calibration
450E Backhoe Loader Machine Electronic Control System
Brake System
450E Backhoe Loader Machine Electronic Control System
Machine Preparation for Troubleshooting
450E Backhoe Loader Machine Electronic Control System
Diagnostic Capabilities
450E Backhoe Loader Machine Electronic Control System
Operational Checks (Steering System)
450E Backhoe Loader Machine Electronic Control System
Operational Checks (Transmission)
450E Backhoe Loader Machine Electronic Control System
Using Caterpillar Electronic Technician to Determine Diagnostic Codes
450E Backhoe Loader Machine Electronic Control System
Visual Inspection
450E Backhoe Loader Machine Electronic Control System
Diagnostic Code List