172
SJ63 AJ+, SJ63 AJ229043AAA
Section 4 – Troubleshooting Information Electrical System - CE & AS
4.3-58 Direction Sensing Inoperative
1. Loose or broken wire #09 from base terminal
block to limit switch LS1.
Check continuity. Replace if defective.
2. Open or defective limit switch LS1. Adjust limit switch if required. Check continuity
through switch. Replace if defective.
3. Loose or broken wire #17 from limit switch LS1
to base terminal block.
Check continuity. Replace if defective.
4. Loose or broken wire #17 from base terminal
block to base plug B pin #6.
Check continuity. Replace if defective.
5. Loose or broken wire #17 in boom cable B or its
connectors.
Check for continuity between pins #6 on cable B.
Check for loose or corroded connections on cable
connectors. Replace if wire is defective.
6. Loose or broken wire #17 from platform plug B
pin #6 to valve driver pin #15 in platform control
console.
Check continuity. Replace if defective.
7. Defective valve driver channel input for direction
sense enable.
See section 5 for test procedure on valve driver.
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