See table 6-29, Ge 6-29 – JLG 10MSP Service Manual User Manual

Page 133

SECTION 6 - TROUBLESHOOTING

3121228

– JLG Lift –

6-29

Code 30 - Traction Module - No Communication with Ground Control Module

Check For These Obvious Conditions First:

• Check if the communications cable connections, P5 connector on the Ground Control Module and round plug on the

Traction Control Module are seated properly in their sockets at each end.

• Check the Positive (+) (RED) and Negative (–) (BLACK) power cable connections from the Ground Control Module to the

Traction Control Module are tight and secure at both ends.

Table 6-29. Code 30 - Traction Module - No Communication with Ground Control Module

STEP

ACTION

SPEC

YES

Check the voltage reading at the main power Positive (+)/Negative (–)
cable connection on the Traction Control Module.

24v DC

Go to Step 2

Repair or Replace

Positive (+) or

Negative (–) Cable

Remove the communications cable, P5 connector at the Ground Control
Module and round connector at the Traction Control Module. Check conti-
nuity of all three (3) wires in the communications cable from end to end. P5
- Pins 2, 3, and 4.

—

Go to Step 3

Repair or Replace

Wire(s)

With communications cable disconnected at both ends, check for continu-
ity between Pins 2, 3, and 4 of the P5 connector end.

—

Repair or Replace

Wires

Go to Step 4

Plug the communications cable on the Traction Control Module to the round
socket on the opposite end of the module. Does this fix problem?

—

Done

Replace Traction

Control Module

Unplug the P5 connector at the Ground Control Module. Check voltage
between pins 2 (– lead-in) and 5 (+ lead-in). Is voltage within spec.

4.5v DC

Done

Replace Ground

Control Module