994D Wheel Loader Power Train Caterpillar

Electronic Control Module (Power Train) - Pinout Specifications

Usage:

994D 3TZ

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Illustration 1	g00416678
Electronic Control Module (ECM) for the Power Train (1) Connector "J1". (2) Connector "J2" .

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Table 1
Connector "J1" for the ECM of the Power Train
Pin ⁽¹⁾	Function	Type
1	+ Battery	+ Battery
2	Ground	Ground
3	CAT Data Link	Input/Output
4	Lamp for the Reduced Rimpull	Solenoid Output 2
5	Ground	Ground
6	+ Battery	+ Battery
7	Solenoid Return	Return
8	Air Start Relay	Solenoid Output 13
9	CAT Data Link	Input/Output
11	Solenoid for Clutch 2	Solenoid Output 4
13	Neutral Switch	Switch to Ground 8
14	Reverse Switch	Switch to Ground 16
15	Return for the Speed Sensor	Return for the Switch and the Sensor
16	Switch and Sensor Ground	Ground
17	Solenoid for Clutch 1	Solenoid Output 3
19	STIC Upshift Switch that is Normally Closed	Switch to Ground 7
20	Steering and Transmission Lock Switch that is Normally Open	Switch to Ground 3
21	Reduced Rimpull Selector Switch 2	Switch to Ground 26
22	Reduced Rimpull Selector Switch 1	Switch to Ground 25
23	STIC Upshift Switch that is Normally Open	Switch to Ground 6
24	Steering and Transmission Lock Switch that is Normally Closed	Switch to Ground 2
25	STIC Downshift Switch that is Normally Closed	Switch to Ground 12
26	STIC Downshift Switch that is Normally Open	Switch to Ground 13
27	Reduced Rimpull Selector Switch 3	Switch to Ground 28
29	Quick-Shift Switch that is Normally Closed	Switch to Ground 4
30	Forward Direction Switch	Switch to Ground 1
31	Quick-Shift Switch that is Normally Open	Switch to Ground 10
32	Lockup Switch for the Torque Converter	Switch to Ground 14
34	Reduced or Maximum Rimpull Switch	Switch to Battery 2
36	Reduced Rimpull Selector Switch 4	Switch to Ground 15
37	Switch for the Pressure of the Park Brake that is Normally Closed	Switch to Ground 11
38	Neutralizer Switch that is Normally Open	Switch to Ground 11
39	Park Brake Switch that is Normally Open	Switch to Ground 9
40	Key Start Switch to + Battery	Switch to Battery 1

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^( 1 )

The connector contacts that are not listed are not used.

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Table 2
Connector "J2" for the ECM of the Power Train
Pin ⁽¹⁾	Function	Type
1	Solenoid for Clutch 4	Solenoid Output 6
3	Solenoid Return	Return
4	Neutralizer Switch that is Normally Closed	Switch to Ground 33 PWM 4
5	Temperature of the Torque Converter Outlet Oil	Switch to Ground 31 PWM 2
6	Impeller Clutch Pressure	Switch to Ground 35 PWM 6
7	Solenoid for Clutch 3	Solenoid Output 5
8	Solenoid for Clutch 5	Solenoid Output 7
9	Power Supply for the Sensor (+10 Volts)	Supply (+10 Volts)
12	Power Supply for the Sensor (+8 Volts)	Supply (+8 Volts)
13	Lockup Clutch Solenoid	Solenoid Output 10
19	Impeller Clutch Solenoid	Solenoid Output 9
22	LED for Gear 3	Fault 3
24	+ Return for the Transmission Output Speed Sensor	+ Frequency Input 3
28	LED for Gear 1	Fault 1
35	- Return for the Transmission Output Speed Sensor	- Frequency Input 3
37	Relay for the Backup Alarm	Solenoid Output 14
38	Torque Converter Output Speed Sensor	Frequency Input 1
40	LED for Gear 2	Fault 2