Cat Wiring C10 C12 C15 C16

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Electrical and
Electronic
Application and
Installation
Guide

● 2000 C-10, C-12, C-15, & C-16

Truck Engines

LEBT9010-01 11-99

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 Table of Contents

Engine Functions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Engine Monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Engine Component Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Engine Control Module (ECM). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Boost Pressure Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Atmospheric Pressure Sensor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Oil Pressure Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Coolant Temperature Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Intake Manifold Air Temperature Sensor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Fuel Temperature Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Engine Speed/Timing Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Power and Grounding Requirements and Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Engine Connection To Vehicle Battery Ground. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
ECM Negative Battery Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Air Starter Equipped Vehicles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Sensor Common Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Suppression Of Voltage Transients. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
ECM Positive Battery Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Voltage Requirements and Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Ignition Key Off Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Welding on a Vehicle Equipped with a C-10, C-12, C-15 and C-16 Engine . . . . . . . . . . . . . . . . . . . . 24
Connectors and Wiring Harness Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
ECM Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
ECM Connector Wire Gauge Size. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
ECM Connector Terminals and Sealing Plugs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Sealing Splices and Ring Terminals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
OEM Harness Routing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Accelerator Pedal Position Sensor Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Accelerator Pedal Position Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Accelerator Pedal Position Sensor Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
ECM Supplied +8V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Mounting the Accelerator Position Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Remote Accelerator Position Sensor PWM Input, Input #8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Vehicle Speed Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
General Vehicle Speed Source Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Passive Magnetic Vehicle Speed Sensor Electrical Requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Passive Magnetic Vehicle Speed Circuit Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Vehicle Speed Connections To Automatic Transmissions with Electronic Vehicle Speed Source . . . 35

C-10, C-12, C-15 & C-16 Truck Engines 3

Table of Contents

ECM Speedometer and Tachometer Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Speedometer And Tachometer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Speedometer And Tachometer Output Electrical Specifications and Connections. . . . . . . . . . . . . . . 37
Connection Of Devices Other Than A Speedometer/Tachometer . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Speedometer and Tachometer Output Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Lamp Outputs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Electrical Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Check Engine Lamp Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Warning Lamp Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Output #1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Output #9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Engine Monitoring and OEM Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Coolant Level Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Coolant Level Sensor Environmental Compatibility. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Coolant Level Sensor Mounting Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Four Pin Coolant Level Sensor Electrical Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Idle Shutdown and Ambient Air Temperature Sensor Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Idle Shutdown Timer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Ambient Air Temperature Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
OEM Installed Switch Inputs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Switch to Ground Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Sensor Common Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Preset Switch to Ground Inputs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Cruise Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Factory Preset Cruise Control Switches Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Additional Switch to Ground Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Diagnostic Enable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Two-Speed Axle On/Off Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Switch-to-Battery Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Ignition Key Switch to Positive Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Programmable Switch to Positive Battery Inputs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Service Brake Pedal Position Switch #2 Function. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Transmission Neutral Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
PTO Engine Governor and Idle Speed Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Dedicated PTO Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Advantages of PTO Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Inputs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Sensor Common for PTO Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
PTO On/Off Switch Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

4 C-10, C-12, C-15 & C-16 Truck Engines

 Table of Contents

PTO Switch On Lamps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

PTO Interlocks. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
PTO Customer Access Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
PTO Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
PTO Configuration - Cab Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
PTO Configuration - Remote Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
PTO Configuration - Remote Throttle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
PTO Configuration - Cab Switches with Torque Limiting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
PTO Configuration - Cab Switches with Ignore Brake/Clutch Switch . . . . . . . . . . . . . . . . . . . . . . . . . 66
PTO Configuration - Remote Switches with Torque Limiting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
PTO Configuration - Remote Switches with Ignore Brake/Clutch Switch for Idle Control . . . . . . . . . . 68
Multiple Speed PTO Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
Engine Retarder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Engine Retarder Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Engine Retarder Solenoid Selector Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Retarder Solenoid Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
Auto Retarder in Cruise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
Engine Retarder Delay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
Programmable Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
Output #2, Output #3, and Output #4 Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
Engine Running Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
Engine Shutdown Output. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
Starting Aid Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Auxiliary Brake. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
Cooling Fan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
Cooling Fan Output Operation with Fan Control Type Programmed to On-Off. . . . . . . . . . . . . . . . . . 79
Cooling Fan Output Operation with Fan Control Type Programmed to Three Speed Fan . . . . . . . . . 80
Air Conditioning High Pressure Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
Input #11 Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
Transmissions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
Allison ATEC Series . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
Allison WTEC Series . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
Allison AT/MT/HT Series . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
Eaton CEEMAT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
Eaton Autoshift . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
Eaton Top 2 Transmissions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
Meritor Engine Syncro Shift (ESS) Transmissions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
Meritor SureShift Transmissions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88

C-10, C-12, C-15 & C-16 Truck Engines 5

Table of Contents

ABS and Traction Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89

Data Links. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
SAE J1587/J1708 Data Link . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
Service Tools and Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
ECM Software Changes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
Information Available Via SAE J1587/J1708 Using SAE J1587 Escape Parameter . . . . . . . . . . . . . . 91
Engine Totals. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
Trip Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
Customer Parameter Cross Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
ECM Wireless Communication Enable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
Economy Model. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
Maintenance Indicator Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
Engine Snapshot Recorder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
Quick Stop Recorder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
SAE J1587 Data Link Broadcast Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
Bit Code Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
SAE J1922/J1708 Data Link . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
SAE J1922 Data Link Broadcast Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
SAE J1922 Status Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
SAE J1922 Override Modes: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101
SAE J1939 Data Link . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101
SAE J1939 Data Link Supported Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
SAE J1939 Broadcast Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
SAE J1939 Received Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109
Customer Specified Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113
Customer Specified Parameter Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142
Customer Parameter Worksheet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150
ECM Date/Time Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153
ECM Diagnostic Clock. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153
ECM Vehicle Harness Connector Terminal Assignments and Loads. . . . . . . . . . . . . . . . . . . . . . . . 154

6 C-10, C-12, C-15 & C-16 Truck Engines

 ELECTRICAL / ELECTRONIC APPLICATION & INSTALLATION MANUAL

INTRODUCTION AND PURPOSE

Electronic engine controls have been developed for heavy duty diesel truck engines to improve performance and
fuel consumption. Caterpillar developed an electronic control system and fuel system with electronically controlled
unit injectors for the C-10, C-12, C-15 and C-16 truck engines. A description of that system follows.
This document is intended to provide necessary information for correct electrical & electronic application and
installation of the C-10, C-12, C-15 and C-16 truck engines into an on-highway truck, bus, motor coach or
vocational chassis. Caterpillar expects there will be some additions and modifications to this document as the
engine program development continues, and as OEM requests for information not currently addressed are added.
The information contained in this version of the document reflects the Caterpillar design for production engines
built as of the publication date with NOV99 Personality Module Software.

The information hereon is the property of Caterpillar Inc. and/or its subsidiaries without
written permission, any copying, transmittal to others, and any use except that for
which it is loaned is prohibited.

General Electronic Engine Operation

1.0 Engine Functions
1.1 Electronic Governing
A full engine speed range electronic governor is used. The electronic governor functions like the Caterpillar
mechanical governor in the mid operating range but includes the special features of isochronous low idle and the
reduction of governor overrun.
1.2 Fuel/Air Ratio Control
The control system has full authority over engine fuel delivery. The mechanical fuel/air ratio control is eliminated.
Electronic control of the fuel/air ratio provides optimum performance while limiting emissions.
1.3 Injection Timing Control
Injection timing is varied as a function of engine operating conditions to optimize engine performance for
emissions, noise, fuel consumption, and drivability.
1.4 Torque Rise Shaping
Electronic controls provide increased flexibility to tailor the torque curve over a wide speed range.
1.5 Engine Monitoring
The control system includes an Engine Monitoring feature which monitors engine oil pressure, engine coolant
temperature and intake manifold air temperature. Coolant Level is also available as an OEM installed option. All
C-10, C-12, C-15 and C-16 engines are shipped with the Caterpillar oil pressure sensor, coolant temperature
sensor and intake manifold air temperature sensor installed. There are four Customer Programmable Levels for the
Engine Monitoring system:
1) Off
2) Warning
3) Derate
4) Shutdown
1.5.1 Engine Monitoring Coolant Level Sensor
The OEM is responsible for providing, installing, and programming the ECM to monitor the coolant level sensor.
The coolant level sensor will respond to the programmed level of Engine Monitoring System. Coolant Level is
selected/programmed through a separate Customer Programmable Parameter “Coolant Level Sensor” with a
default factory setting of No (Not Installed). For installation guidelines, programming options, and sensor electrical
requirements refer to “11.0 Coolant Level Sensor” on page 42.

C-10, C-12, C-15 & C-16 Truck Engines 7

 ELECTRICAL / ELECTRONIC APPLICATION & INSTALLATION MANUAL

1.5.2 Engine Monitoring Programmed “Off”

The ECM will not indicate low oil pressure, low coolant level, high coolant temperature or high intake manifold air
temperatures. Coolant Temperature will be used for Cold Mode and cooling fan control. Intake Manifold Air
Temperature is used for cold air operation and for cooling fan control. Coolant Level sensing is not used.
1.5.3 Engine Monitoring Programmed to “Warning”
If Engine Monitoring is programmed to Warning, the ECM monitors oil pressure, coolant temperature, intake
manifold air temperature, and coolant level (if a coolant level sensor is installed). The following table and graph
indicate the diagnostic codes available, their trip point, and their effect on engine performance when active. The
Check Engine Lamp will flash and the Warning Lamp will illuminate as indicated in the table when the diagnostic
code is active.

PID- Code Description C-10 and C-12 C-15 and C-16 Warning Derate
FMI Trip Points Trip Point Lamp
100-01 Low Oil Pressure Warning See Figure1 See Figure1 SOLID NONE
100-11 Very Low Oil Pressure See Figure1 See Figure1 SOLID NONE
105-00 High Intake Manifold Air Temp. Warning 195°F (91°C) 195°F (91°C) SOLID NONE
105-11 Very High Intake Manifold Air Temp. 229°F (109°C) 229°F (109°C) SOLID NONE
110-00 High Coolant Temp. Warning 218°F (103°C) 227°F (108°C) SOLID NONE
110-11 Very High Coolant Temperature 224°F (107°C) 233°F (112°C) SOLID NONE
111-01 Low Coolant Level Warning See Figure 2 See Figure 2 SOLID NONE
111-11 Very Low Coolant Level See Figure 2 See Figure 2 SOLID NONE

Oil Pressure (psi) Oil Pressure (psi)

25.0
45.0
40.0
20.0
35.0
Low Oil Pressure
Low Oil Pressure 30.0
15.0
25.0
Very Low Oil Pressure
20.0
10.0
Very Low Oil Pressure 15.0
10.0
5.0
5.0
0.0
0.0
600 1000 1500 2000 500 700 1200 1600 2100
Engine rpm Engine rpm

C-10 & C-12 Engine Monitoring Oil Pressure Graph C-15 & C-16 Engine Monitoring Oil Pressure Graph

Figure 1 - Low Oil Pressure Graphs

8 C-10, C-12, C-15 & C-16 Truck Engines

 ELECTRICAL / ELECTRONIC APPLICATION & INSTALLATION MANUAL

Start/Restart
Warning Tripped
Derate
Maximum rate will not
exceed 10% per second
30 Second

Debounce
Delay 160 hp (119 kW)

Warning
Power
45 mph (72.5 km/h)

Shutdown

0 10 20 30 40 50 60
Time (seconds)

Figure 2 - Low and Very Low Coolant Level Graph

1.5.4 Engine Monitoring Programmed to “Derate” or “Shutdown”

If Engine Monitoring is programmed to Derate or Shutdown the ECM will alter engine performance when operating
parameters are exceeded. Whenever the engine is derated, the Check Engine Lamp (due to active diagnostic) and
Warning Lamp will flash. For the DERATE column in the following table, mph indicates vehicle speed is limited
(maximum speed is 45 mph [72.5 km/h]), “pwr” indicates engine power is limited (maximum derate is 160 hp [119
kW]), and rpm indicates engine speed is limited (maximum derate is 1350 rpm). For operating conditions causing
these codes see the appropriate section for the sensor under consideration.

PID- Code Description C-10 and C-12 C-15 and C-16 Warning Derate
FMI Trip Points Trip Point Lamp
100-01 Low Oil Pressure Warning See Figure1 See Figure1 SOLID NONE
100-11 Very Low Oil Pressure See Figure1 See Figure1 FLASH mph, pwr,
rpm
105-00 High Intake Manifold Air Temp. Warning 195°F (91°C) 195°F (91°C) SOLID NONE
105-11 Very High Intake Manifold Air Temp. 229°F (109°C) 229°F (109°C) SOLID NONE
110-00 High Coolant Temperature Warning 218°F (103°C) 227°F (108°C) FLASH mph, pwr
110-11 Very High Coolant Temperature 224°F (106°C) 233°F (112°C) FLASH mph, pwr
111-01 Low Coolant Level Warning See Figure 2 See Figure 2 SOLID NONE
111-11 Very Low Coolant Level See Figure 2 See Figure 2 FLASH mph, pwr

C-10, C-12, C-15 & C-16 Truck Engines 9

 ELECTRICAL / ELECTRONIC APPLICATION & INSTALLATION MANUAL

1.5.5 Engine Monitoring Time to Shutdown

The following table indicates active diagnostic codes capable of shutting down the engine when the ECM is
programmed to Shutdown. The “Time to Shutdown” column indicates the minimum time before the engine will
shutdown if the engine has already been running for at least 30 seconds. “Start/Restart Time” is running time if the
code is active when the engine starts, or following an Engine Monitoring caused shutdown. “NO” indicates the code
will not shutdown the engine. Note these times assume the condition causing the code exists continuously and is
not intermittent.

PID-FMI Code Description Time To Shutdown Start/Restart Time

100-01 Low Oil Pressure Warning NO NO
100-11 Very Low Oil Pressure 30 SEC. 18 SEC.
105-00 High Intake Manifold Air Temperature Warning NO NO
105-11 Very High Intake Manifold Air Temperature NO NO
110-00 High Coolant Temperature Warning NO NO
110-11 Very High Coolant Temperature 20 SEC. 60 SEC.
111-01 Low Coolant Level Warning NO NO
111-11 Very Low Coolant Level 30 SEC. 80 SEC.

10 C-10, C-12, C-15 & C-16 Truck Engines

Cat Wiring C10 C12 C15 C16
Full download: http://manualplace.com/download/cat-wiring-c10-c12-c15-c16/
ELECTRICAL / ELECTRONIC APPLICATION & INSTALLATION MANUAL

SAE J1587 Data Link

Electronic
SAE J1922 Data Link
Control
Module
SAE J1939 Data Link

3 Retarder Solenoids
BATTERIES
Cruise Control On/Off & Set/Resume Switches

Engine Retarder Level Switches

Accelerator Pedal Position Sensor

6 Electronic Unit Injectors

Clutch and Service Brake Switches
Caterpillar Installed

OEM Installed
Coolant Level Sensor

Check Engine & Warning Lamps

Crankshaft Position Sensor

Speedometer & Tachometer
15

Camshaft Position Sensor M

k m
P
/
H
h
5

RPM X 100 30
25

Cooling Fan
1.5 A
Atmospheric Pressure Sensor

Vehicle Speed Sensor

Oil Pressure Sensor

Boost Pressure Sensor A/C High Pressure Switch

Coolant Temperature Sensor Remote Accelerator Position Sensor

Fuel Temperature Sensor 2, 0.3A Outputs

Ignition Key Switch

7 Switch Inputs
Intake Manifold Air Temperature Sensor
3, 1.0A Outputs
2 Passive Temperature
Sensor Inputs
3, 1.5A Outputs

Figure 3 - C-10, C-12, C-15 and C-16 Component Diagram

C-10, C-12, C-15 & C-16 Truck Engines 11

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