2-27
2-27
502818
502818
CHAPTER 2 TROUBLESHOOTING FOR CONTROL CIRCUITS
CHAPTER 2 TROUBLESHOOTING FOR CONTROL CIRCUITS
(16) Driving and reading
(16) Driving and reading
Motor speed feedback
Motor speed feedback
of
of
output monitor
output monitor
Check the value of speed is smooth and not erratic
Check the value of speed is smooth and not erratic
feedback
feedback
Smooth
Smooth
Rough
Rough
or
or
erratic
erratic
(15) Driving and check the jerky and change directions at
(15) Driving and check the jerky and change directions at
very low speed
very low speed
Normal
Abnormal
Normal
Abnormal
(18) Replace traction motor
(18) Replace traction motor
(17) Follow the traction inverter testing procedure
(17) Follow the traction inverter testing procedure
Normal
Abnormal
Normal
Abnormal
(13) C
(13) C
onnec
onnec
t
t
all conne
all conne
ctors
ctors
,
,
battery plug a
battery plug a
nd turning on
nd turning on
power
power
Raise wheels off floor
Raise wheels off floor
Without service tool
Without service tool
With service tool
With service tool
(20) Replace traction inverter
(20) Replace traction inverter
(19) Remove DSP cover of traction inverter and check DSP
(19) Remove DSP cover of traction inverter and check DSP
flat cable for looseness or wire breakage
flat cable for looseness or wire breakage
Normal
Abnormal
Normal
Abnormal
(22) Secure DSP flat cable if loose
(22) Secure DSP flat cable if loose
Replace traction inverter if wire breaks
Replace traction inverter if wire breaks
(21) Replace DSP card of traction inverter
(21) Replace DSP card of traction inverter
All powe
All powe
r cables
r cables
conne
conne
ct and turning on powe
ct and turning on powe
r
r
If fault (15) remains
If fault (15) remains
(23) Perform inverter discharging work
(23) Perform inverter discharging work
(25) Perform inverter discharging work
(25) Perform inverter discharging work
(26) Replace the traction inverter ASSY with the original
(26) Replace the traction inverter ASSY with the original
inverter AS
inverter AS
SY
SY
again
again
, then replace
, then replace
the traction mot
the traction mot
or
or
Please keep the inverter ASSY which is used for
Please keep the inverter ASSY which is used for
inspection at step (24) because the ASSY is normal
inspection at step (24) because the ASSY is normal
(24) Replace the DSP card with t
(24) Replace the DSP card with t
he original
he original
card again
card again
,
,
then replace the traction inverter
then replace the traction inverter
Please keep the DSP card which is used for inspection
Please keep the DSP card which is used for inspection
at step (21) because the card is normal
at step (21) because the card is normal
If fault (15) remains
If fault (15) remains
(12) Disconnect connectors E-07 and CN1
(12) Disconnect connectors E-07 and CN1
Check continuity between E-07-5 and E-17-1 (6)
Check continuity between E-07-5 and E-17-1 (6)
Check continuity between E-07-6 and E-17-2 (7)
Check continuity between E-07-6 and E-17-2 (7)
Check continuity between E-07-7 and E-17-4 (8)
Check continuity between E-07-7 and E-17-4 (8)
Check continuity between E-07-19 and E-17-3 (5)
Check continuity between E-07-19 and E-17-3 (5)
Continuity
Continuity
No
No
continuity
continuity
(14) Repair or replace harness
(14) Repair or replace harness
(13) C
(13) C
onnec
onnec
t
t
all conne
all conne
ctors
ctors
,
,
battery plug an
battery plug an
d turning on
d turning on
power
power
Raise wheels off floor
Raise wheels off floor
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