JLG SSV10 Service Manual - Manual (Page 109)

SECTION 6 - TROUBLESHOOTING
3121187 – JLG Lift – 6-17
Code 16 - Lift Down Valve - Short Circuit
Check For These Obvious Conditions First:
• Damaged wiring in the lift down valve wiring harness or a damaged lift down valve coil.
Code 17 - Ground Control Module - In Fold Back
Check For These Obvious Conditions First:
• Has machine been operating on a continuous grade or rough terrain for a long period of time.
Table 6-17. Code 16 - Lift Down Valve - Short Circuit
STEP ACTION SPEC YES NO
1. At the Ground Control Module, P1 connector, check the voltage
across pins 10 and 3 to the lift down valve coil. Is reading within
specification?
0 - 2V DC Go to Step 2
Replace Ground
Control Module
2. Remove the wire terminals at the lift down valve coil. Check resis-
tance reading of the coil. Is coil within specification? 6 Ohms Go to Step 3 Replace Coil
3. With the terminals still removed from the lift down valve coil, check
continuity of the wires from pins 10 and 3 on the P1 connector to the
lift down valve.
.00 Ohms —
Repair or Replace
Wiring
Table 6-18. Code 17 - Ground Control Module - In Fold Back
STEP ACTION SPEC YES NO
1. Allow Ground Control Module to cool for 30 minutes. Does the
machine operate OK after cooling. — —
Replace Ground
Control Module
NOTE: If this is a recurring problem compare current draw of your machine with Ground Control Module specifications in
Table 6-3 - Amperage Draw for Various Components.