HARNESS AS-CONTROL 2756911 - Caterpillar

ECM Circuit Connections
A module identifier (MID) is assigned to the control modules on the machine. The MID is used to identify which ECM on the machine has activated a diagnostic code or an event code.The MID for the Drivetrain ECM:Drivetrain ECM - MID 081 (The ECM Location code is 3)The following table provides a list of the machine wiring harness circuit connections for the Drivetrain ECM. Note: ECM connector contact connections that are not listed are not used for this application.
Table 1
Drivetrain ECM - J1 Contact Connections
MID 081
No.(1) Function Type
1 Key Switch On Key Switch Input
2 Engine Speed Sensor (+) Frequency Input
3 Engine Speed Sensor (-) Frequency Input
5 Motor 1 Speed Sensor 2 Signal A Frequency Input
7 Motor 1 Speed Sensor 2 Signal B Frequency Input
8 Electric Drive Cooling Fan Speed Sensor (+) Frequency Input
9 Electric Drive Cooling Fan Speed Sensor (-) Frequency Input
10 Cat Data Link (+) Input/Output
11 5 Volt Sensor Supply to EFR Sensor Supply
12 EFR Enable ON/OFF Output
13 (-) Battery System Power
16 Right Hand Motor Speed Sensor 2 Signal A Frequency Input
18 Motor 2 Speed Sensor 2 Signal B Frequency Input
19 CAN Shield - EFR circuit shield CAN Shield
20 Cat Data Link - Input/Output
21 Generator Temperature Sensor Return Return (ECM Ground)
22 Generator Drive End Bearing Temperature Sensor 1 Passive Analog Input
23 (-) Battery System Power
26 Location Code 0 Ground Input
27 Location Code 1 Ground Input
28 Location Code 2 - No connection Ground Input
29 Generator Stator Temperature Sensor 1 Analog Input
30 Generator Stator Temperature Sensor 2 Analog Input
31 Battery + System Power
32 Location Code Enable Ground Input
38 Battery (+) System Power
39 Battery (+) System Power
44 8 Volt Sensor Power Supply to Throttle Pedal Position Sensor Sensor Power
45 8 Volt Sensor Power Return to Throttle Pedal Position Sensor Return (ECM Ground)
48 Electric Drive Cooling Fan Driver PWM Proportional Output
50 Electric Drive Cooling Fan Return PWM Return
53 Generator Non Drive End Bearing Temperature Sensor 2 Passive Analog Input
55 EFR Return PWM Return
57 (-) Battery System Power
60 EFR Return PWM Return
63 Motor 2 ECM Enable Switch to Ground Input
64 Motor 1 ECM Enable Switch to Ground Input
69 10 Volt Sensor Power Supply Sensor Power
70 10 Volt Sensor Return ECM Ground
(1) The connector contacts that are not listed are not used. The connector has 70 contacts.
Table 2
Drivetrain ECM - J2 Contact Connections
MID 081
No.(1) Function Type
4 EFR Circuit Return ECM Ground
8 EFR Circuit Return ECM Ground
9 Motor 1 ECM Enable Sinking Driver Output
10 Motor 2 ECM Enable Sinking Driver Output
16 Steer Cylinder Position Sensor PWM Input
17 (+) DC Power Bus Voltage Status Signal 1 PWM Input
18 (+) DC Power Bus Voltage Status Signal 2 PWM Input
21 EFR Current Control Command Sinking Driver Output
22 (-) DC Power Bus Voltage Status Signal 1 ECM Ground
24 Requested Gear Command from Chassis ECM PWM Input
28 Redundant DC Power Bus Voltage Status Signal 1 PWM Input
29 Redundant DC Power Bus Voltage Status Signal 2 PWM Input
31 Throttle Lock Switch Switch to ground input
32 Throttle Pedal Position Sensor PWM Input
34 EFR Diagnostic Feedback PWM Input
40 Left Front