TM 10-3930-675-20-1 0010 00-5 OVERLOAD PROTECTION TROUBLESHOOTING - CONTINUED 0010 00 Table 4. Error Code 133 - Left Lift Cylinder Pressure Sensor or Circuit Failure Troubleshooting Procedures - Continued. MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION Error  Code  133  -  Left  Lift  Cylinder  Pressure Sensor or Circuit Failure - Continued 2.  Remove cover from junction box X167, located at forward end  of  engine  compartment. Start engine and check voltage  between  pin  16  and pin 17. Voltage should be 20- 25V. If  voltage  is  present,  check voltage at junction box X167 pin 19. Voltage should be 0.3- 10.8V  depending  on  actual hydraulic pressure. If voltage is not present, replace left    cylinder    pressure    sensor (WP 0101 00). 3.  Remove   ECU   (790)   cover from operator’s seat base and slide ECU mounting tray out (WP 0079 00). 4.  Check ECU (790) connector 1, connector X159, and ECU tray    grounding    leads    for proper connection. a.  Connect any loose or disconnected connections. Push  ECU mounting  tray  in and install cover. b.  Repair or replace any damaged    connectors    (WP 0111 00). Push ECU mounting  tray  in  and  install cover. 5.  Perform    voltage    check    at connector X159 pin 3. Voltage should be 20-25V. 6.  If voltage is present in step 5, check     continuity     between connector   X159   pin   3   and junction  box   X167   pin   16, between connector X159 pin 4 and junction box X167 pin 17,   and   between   connector X159 pin 6 and junction box X167 pin 19. If    continuity   is    not    present, repair or replace connectors (WP 0111 00).