Error codes H4-1, H4-2, H4-3, H4-4
Turn the ignition key switch OFF,
disconnect the battery negative
terminal, replace the attachment 1
lever potentiometer with the
attachment 2 lever potentiometer,
and check if there is any change in
the error.
H4-*
H3-4
Installation defect
Attachment 2
lever potentiometer abnormality
H3-1·H3-2·H3-3
Inspection 2:
Harness continuity and short circuit
inspection
NG
OK
Harness defect
Fuse inspection
OK
Replace fuse
NG
SAS/OPS/mini lever
Inspection 1:
Attachment 2 lever potentiometer
inspection
NG
OK
No error
Error
Connector contact defect
Disconnect the battery negative
terminal, after inspecting and
correcting disconnect and water
entry of A21, A23, AO3, XO2, YX1
and Y3, reconnect all connectors
and the battery negative terminal,
turn the ignition key switch ON,
and check whether or not there is
an

H-4 codes are errors for the 4th lever, attachment
H-3 side shift
H-2 Tilt
H-1 Lift

should be more to the code than that. no codes shown in the manual for that