988G Wheel Loader Electrohydraulic System Caterpillar


Pinout Specifications for Implement Electronic Control

Usage:

988G 2TW



Illustration 1g00105158

Implement Control

(1) Connector J1. (2) Connector J2.




Illustration 2g00105159

Implement Control Connector

Table 1
40-Pin Connector J1    
Connector Pin     Function    
1     + Battery    
2     Ground    
3     CAT Data Link -    
4     Lower Proportional Solenoid    
5     Ground    
6     + Battery    
7     Solenoid Return    
8     Pilot Supply On/Off Solenoid    
9     CAT Data Link +    
10     Lift Proportional Solenoid    
11     Dump Solenoid (1)
Tip Forward Solenoid (2)    
12     Implement Pump Indicator    
13     Implement Lockout Switch (N/O)    
14     Implement Lockout Switch (N/C)    
15     Digital Ground    
16     Digital Ground    
17     Tilt Back Solenoid (1)
Tip Rearward Proportional Solenoid (2)    
18     Lift Kickout Detent Solenoid    
19     Lift and Tilt Kickout Set Switch (N/O) (1)    
20     Lift and Tilt Kickout Set Switch (N/C) (1)    
23     Hydraulic Function Selector Switch (N/O)    
24     Hydraulic Function Selector Switch (N/C)    
30     Spare Switch Input (1)    
31     Spare Switch input 2 (1)    
35     Load and Carry Switch (N/C) (1)    
36     Load and Carry Switch (N/O) (1)    
40     + Battery    
( 1 ) 988G
( 2 ) 834G

Table 2
40-Pin Connector J2    
Connector Pin     Function    
1     Auxiliary Function Rod End Solenoid    
2     Tilt Out Detent Solenoid (1)    
3     Solenoid Return    
4     Lift Lever Position Sensor    
5     Tilt Lever Position Sensor    
6     Auxiliary Lever Position Sensor (1)    
7     Axle Cooler Fan Solenoid    
8     Auxiliary Function Head End Solenoid    
13     Regeneration Valve (IF Equipped)    
14     Tilt Linkage Position Sensor (1)    
19     Variable Pump Proportional Solenoid    
23     Variable Pump Pressure Sensor    
35     Lift Linkage Position Sensor (1)    
37     Lower Kickout Detent Solenoid (1)    
( 1 ) 988G

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