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Section 4 – Troubleshooting Information
11. loose or broken wire 42A from turret harness plug
pin 11 to 2H-42A flow enable valve.
12. loose or broken wire 02 from 2H-42A flow enable
valve to ground.
4.2-12 No Drive or Steer
No Drive or Steer Functions:
1. Loose or broken wire #4 from platform terminal
block to drive joystick A2.
2. Loose or broken wire #02 from platform terminal
block to drive joystick A2.
3. Defective drive joystickA2.
No Forward Drive:
1. No output on "D" when forward is selected on
drive joystick A2.
2. Loose or broken wire "D-signal" from drive
joystick A2 to J3 pin #14 of valve driver .
3. No output from valve driver J2 pin #1 to wire
#16.
4. Loose or broken wire 16 from valve driver J2 pin
#1 to plug B pin #5.
5. Loose or broken wire #16 in cable B or its
connectors.
6. Loose or broken wire #16 from base plug B pin
#5 to drive pump valve connector pin #4.
7. Loose or broken wire #16 from drive pump valve
connector pin #4 to 4H-16 Forward coil.
8. Loose or broken wire #02 wire from 4H-16
Forward coil to ground.
9. Defective forward coil 4H-16.
No Reverse Drive:
1. No output on "D" when forward is selected on
drive joystick A2.
2. Loose or broken wire "D-signal" from drive
joystick A2 to J3 pin #14 of valve driver .
3. No output from valve driver J2 pin #2 to wire
#15.
229044ADA
122
Check continuity. Replace if defective.
Check continuity. Replace if defective.
Check continuity. Replace if defective.
Check continuity. Replace if defective.
See drive joystick test procedure in section 5.
See drive joystick test procedure in section 5.
Check continuity. Replace if defective.
Check continuity. Replace if defective.
Check continuity. Replace if defective.
Check for continuity between pins #5 on cable B.
Check for loose or corroded connections on cable
connectors. Replace if wire is defective.
Check continuity. Replace if defective.
Check continuity. Replace if defective.
Check continuity. Replace if defective.
Check continuity and resistance through coil.
Replace if defective.
See drive joystick test procedure in section 5.
Check continuity. Replace if defective.
Check continuity. Replace if defective.
Electrical System
SJ85 AJ
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