These are my personal notes, not directly from any book
If anyone has new info or codes to add to list please write me and I'll add them

7400 Trouble codes


If a 7000 series VM part number ends in /005 or lower it must have Flash ware VM Software version 5.6 or older. VMs ending in /006 may have any version but the latest available is recommended. REMEMBER, match software version are required, view the software model number table in flashware to determine the correct versions. If you have to use version 5.6 in the VM you MUST have version 3.4 in the DM and 3.2 in the Amplifiers. VM version 5.6 and DM version 3.4 are NOT currently on the laptops UNLESS you copy them from a truck. IF you are updating a VM from a version OLDER than 5.0 to ANYTHING newer please refer to RSB RCH-07-011A for further instructions.Codes: Failure:
1H. Trac amp overheat
1T. Batt low
1V. Lift amp overheat
2A. Trac amp almost too hot
2C. Trac amp temp out of range
2E. Trac MT temp sen out of rang
2H. Trac MT encoder failed
2M. Trav power amp failed
2P. Trac pwr amp revert default
2T. Trac pwr amp current cal err
2U. Trac pwr amp overcurrent
2V. Trac amp. High DC vlots

42. Lift con closed when comm open
43. Lift con open, low volts at pwr up
44. TPC con det clo. when comm open
45. TPC con det open, low volt pwr up
4B. Steer con det clo when com open
4C. Steer con det op when com close
4D. No pre char trc DC inp V startup
4E. No pre char Lif dc inp v start up

57. VM not resp to oper display
58. Oper com sensor sys can failure
59. CAN trans buffer error bus 1
5A. CAN bus error/VM for bus1
5B. CAN receive Bus error/VM
5G. No comm rcvd from TP amp
5J. No comm Lift Power amp
5M. TPA CAN watchdog timout
5P. Lift PA CAN watchdog timout
5Q. Disp Man not responding
5R. Second CAN bus error BUS E
5T. No CAN message from any node

61. Mast sw. #1 not closed
62. Lift PA revert to default
63. HS & 1st sp limit switches off sync
64. No pulses from height encoder
66. Calc height > config height
67. Calc hi won't match 1st sp lim sw
6D. Press sense out of range
6F. Lift motor overheat
6G. Lift mt temp sensor out of range
6S. Lift PA temp sensor out of range
6T. Lift PA current Cal error
6U. Lift mt brush wear
6V. Lift power amp failed
6W. Encoder failed lift motor feedback
6X. Lift PA overcurrent
6Y. Lift PA fault Hi DC volts
6Z. Flashware para do not match

80. Throttle pot out of range
81. Lift pot out of range
83. Throttle pot out of neutral
84. Brake inop/ out of adj
88. +5V pwr supp out of range
8A. Oper comp sensor out of range
8C. Deadman signals do not agree
8F. Lt pot out of neutral
8G. Secondary pot out of range
8H. Secondary pot out of neutral
8J. Ambiant temp sensor out of range
8K. Deadman out of range
8L. Brake feedback cur. Out of range
8M. Internal handle heater failure
8N. Opt. stat sw. closed at start-up

AO. - Wrong software for truck
AH. -Bad oper. display checksum
AJ. -Bad VM flash memory
AK. -Bad VM RAM memory
AL. -Bad bat. back-up VM RAM mem
AM. -Bad oper display flash mem
AN. -Bad operator display

EH. -Invalid interrupt-oper display

F4. -VM cop timeout
F5. -Bad OP Code
F8. -VM. Cop not enebled
FE. -VM not calibrated
FG. 5&/or 12 v. pwr sup out of range
FH. Batt out of range
FN. VM did not power off
FP. VM hardware failed
FR. VM config item out of range
FT. VM internal software failure
FV. Display, internal software failed
GO. Steer tiller 1 , channel A/B fault
G3. St. Feedback prox sensor fault
G4. Open in steer control circuit
G5. Short in steer motor encoder ckt
G7. Steer tiller 2 chan A/B fault
GD. Open in steer motor encoder ckt
GE. Steer encoder failure