113
SJ1044 TH, SJ1044 THS, SJ1056 TH, SJ1056 THS, SJ1256 THS
230790ABA
Electrical System Section 4 – Troubleshooting Information
14. Loose or broken wire 00 from boom up enable
relay 28CR pin 85 to ground
Check continuity. Replace if defective
15. Defective relay 28CR.
Check continuity through contacts of relay (pin 30
to 87 with coil energized). Replace if defective.
16. Loose or broken wire 14A from 28CR relay to 31
pin chassis harness connector J31 pin 3
Check continuity. Replace if defective
17. Loose or broken wire 14A from connector P31 pin
3 to boom up enable solenoid 2H-14A connector
J25 pin 1.
Check continuity. Replace if defective
18. Loose or broken 00 wire from boom up enable
solenoid 2H-14A connector J25 pin 2 to ground
Check continuity. Replace if defective
19. Defective boom up enable solenoid 2H-14A Replace if defective.
With following conditions:
▪
No Frame Level
1. Fuse F5 open Check for defective wiring. Replace fuse
2. Loose or broken 05R wire from fuse F5 to 31 pin
Chassis harness connector J31 pin 24
Check continuity. Replace if defective.
3. Loose or broken 05R wire from connector P31 pin
24 to frame angle sensor connector J105 pin 2
Check continuity. Replace if defective.
4. Loose or broken 00 wire from frame angle sensor
connector J105 pin 3 to ground.
Check continuity. Replace if defective.
5. Frame angle sensor defective.
With boom below 40° and frame level check for
voltage on wires 28 (pin 5), 28R (pin 7), and 28L
(pin 6). Replace if defective.
4.2-15 Frame Will Not Tilt Over 40° With Boom Below 40°
1. Loose or broken 05R wire from connector P31 pin
24 to boom 40° angle proximity switch connector
J71 pin 1
Check continuity. Replace if defective
2. Loose or broken 00 wire from boom 40° angle
proximity switch connector J71 pin 3 to ground.
Check continuity. Replace if defective.
3. Boom 40° angle proximity switch misadjusted or
defective.
Check adjustment (set to 40°) , replace if defective
4. Loose or broken 212 wire from boom 40° angle
proximity switch connector J71 pin 2 to 31 pin
Console harness connector P31 pin 25
Check continuity. Replace if defective
5. Loose or broken 212 wire from connector J31 pin
25 to boom angle relay 212CR pin 86.
Check continuity. Replace if defective
To Next Page
Loading...
