PLUNGER 3473274 - Caterpillar

Illustration 1 g01197921
Schematic for the Continuous Flow Rocker SwitchThis diagnostic code is recorded when the status of both the normally open inputs and normally closed inputs are grounded. This switch has two inputs to the ECM. The inputs are normally open and normally closed. During proper operation, one input is open and the other input is grounded.The possible causes of this diagnostic code are listed:
The normally open circuit is shorted to ground while the normally closed circuit is grounded through the switch.
The normally closed circuit is shorted to ground while the normally open circuit is grounded through the switch.
The normally open circuits and the normally closed circuits are shorted to ground in the harness.
The normally open circuits and normally closed circuits are shorted together. The switch must be in one specific position.
The switch has failed.System Response:The machine response is listed:
The implements will not work.Table 1 contains wire numbers and connector contacts. Use this information to troubleshoot the failed circuit.
Table 1
Switch Continuity    
Switch / CID     Switch State     Implement ECM Connector Contact No.     Switch Contact     Wire No.     Status    
CID 1187 Continuous Flow Rocker Switch     SET/ON     J2-53     N/C (3)     T969-YL     O (2)    
J2-52 N/O (1)     T970-GY     G (4)    
OFF J2-53     N/C     T969-YL     G    
J2-52 N/O     T970-GY     O    
( 3 ) N/C = Normally Closed.
( 2 ) O = Open (no continuity to ground).
( 1 ) N/O = Normally Open.
( 4 ) G = Grounded (continuity to ground).Note: The following test procedure may create other diagnostic codes. Ignore these created diagnostic codes and clear