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CHAPTER 2 TROUBLESHOOTING FOR CONTROL CIRCUITS
CHAPTER 2 TROUBLESHOOTING FOR CONTROL CIRCUITS
3. 3.50
50 Ba
Batt tter ery V
Error code: 78
Error code: 78
Situat
Sit
uation
ion
Possible
Possible
cause
cause
Trigger of
Trigger of
the error
the error
code
code
Checks
Checks
(1) Disconnect battery plug
(1) Disconnect battery plug
Measur
Measure battery voltage with m
36
36
V
V
(2) Turn on power in Setup Option Group 3 setting
(2) Turn on power in Setup Option Group 3 setting
(4) Set #46 of Setup Option Group 3
(4) Set #46 of Setup Option Group 3
(5) Turn off power and turn on power again
(5) Turn off power and turn on power again
(6) Disconnect battery plug, then perform inverter
(6) Disconnect battery plug, then perform inverter
discharging work
discharging work
(7) Disconnect connector E-01
(7) Disconnect connector E-01
Check
Check
(8) Perform inverter discharging work, then replace logic
(8) Perform inverter discharging work, then replace logic
card of logic unit
card of logic unit
y Vol olta tage T
ge Too L
oo Low (
ow (78
Displa
Dis
play: "7
y: "78".
8". All t
All truc
ruck ope
k operat
ration
Faulty or discharged battery, low voltage battery, improper battery voltage setting (Setup Option #41),
Faulty or discharged battery, low voltage battery, improper battery voltage setting (Setup Option #41),
improper battery voltage adjustmen
improper battery voltage adjustment setting (Setup Option #46), faulty
Corrected battery voltage is too
Corrected batter
y voltage is too low. Battery voltage is corrected by #46
36 36 V V battery:
battery: less
less than
than 30 30 V V
e battery voltage with
multimeter
ultimeter
battery:
battery:
34
34
to
to
42
42
V,
V,
48
48
V
V
battery:
battery:
If fault remains
If fault remains
continuit
continuit
y
y
between
between
E-02-19(105)
E-02-19(105)
Continuity
Continuity
No
No
continuity
continuity
78) )
ions inh
s inhibi
ibited
ted. Li
. Line c
ne cont
ontact
actor O
or OPEN
t setting (Setup Option #46), faulty main harness, faulty logic unit.
low. Battery voltage is corrected by #46 value.
48 48 V V battery:
battery: less
less than
than 42 42 V V
45
45
to
to
60
60
V
V
(3) Charge battery or replace with proper battery
(3) Charge battery or replace with proper battery
and E
and
E-01-14
-01-14
(9) Repair or replace main harness
(9) Repair or replace main harness
PEN and p
and pum
ump con
p contac
tactor
tor OPE
OPEN. N.
main harness, faulty logic unit.
value.
Abnormal
Abnormal
502542
502542
2-113
2-113
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