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CHAPTER 2 TROUBLESHOOTING FOR CONTROL CIRCUITS
CHAPTER 2 TROUBLESHOOTING FOR CONTROL CIRCUITS
3.19 9 Tra
3.1
Tracti
Error code: 46
Error code: 46
Situation
Situation
Possible
Possible
cause
cause
Trigger of
Trigger of
the error
the error
code
code
Checks
Checks
(1) Disconnect battery plug, then perform inverter discharging work
(1) Disconnect battery plug, then perform inverter discharging work
(2) Check left traction inverter and motor for cable
(2) Check left traction inverter and motor for cable
looseness and improper contact
looseness and improper contact
(3) Disconnect left traction motor cables from inverter
(3) Disconnect left traction motor cables from inverter
Measure resistance of motor cables
Measure resistance of motor cables
(U, V and W phases)
(U, V and W phases)
(5)
(5) Ch
Check co
eck
looseness
looseness
(7)
(7) D
Disco
isconnect con
inverter and remove DSP cover
inverter and remove DSP cover
Check DSP flat cable for looseness or wire
Check DSP flat cable for looseness or wire
breakage
breakage
(11) D
(11)
Disconnect connec
isconnect
Check continuity between E-01-5 and E-06-16(9)
Check continuity between E-01-5 and E-06-16(9)
Check continuity between E-01-6 and E-06-20(12)
Check continuity between E-01-6 and E-06-20(12)
Gate power supply
Gate power supply
(13) Dis
(13)
Disconne
Check continuity between E-02-5 and E-06-3(3)
Check continuity between E-02-5 and E-06-3(3)
Check continuity between E-02-6 and E-06-4(4)
Check continuity between E-02-6 and E-06-4(4)
(14)
(14) Con
Connect connec
power again
power again
ction
on Mot
Motor or L. L.H.,
H., Ope
Open (
n (46)
Display: "46". Traction motor operation inhibited. Pump motor and power steering operations inhibited if this
Display: "46". Traction motor operation inhibited. Pump motor and power steering operations inhibited if this
fault occurs before pump contactor CLOSE, and both operable if it
fault occurs before pump contactor CLOSE, and both operable if it occurs after pump contactor CLOSE. Line
contactor OPEN and pump
contactor OPEN and pump contactor CLOSE or OPEN.
Faulty contact or wire breakage of left side traction motor cable, faulty left
Faulty contact or wire breakage of left side traction motor cable, faulty left side traction motor, faulty contact or
wire breakage of left side traction inverter connector, faulty contact of DSP flat cable in left side
wire breakage of left side traction inverter connector, faulty contact of DSP flat
inverter, wire breakage of main harness, faulty power supply card
inverter, wire breakage of main harness, faulty power supply card of logic unit, faulty
traction inverter, faulty left side traction inverter, when restarting after motor shorted
traction inverter, faulty left
Motor voltage is abnormal when power is turned on. Current does not
Motor voltage is abnormal when power is turned on. Current does not flow when torque instruction is
requested.
requested.
Normal
Normal
Abnormal
Abnormal
Less
Less
than
than
1
1
Ω
Ω
1
1
Ω
Ω
connec
nnector
tor
E-06
E-
06
of left
of left
traction
traction inver
Normal
Normal
Abnormal
Abnormal
nnect
connector E-06
nector E-06
of left
of left
traction
traction
Normal
Normal
Abnormal
Abnormal
connector E-01
tor E-01
of logic unit
of logic unit
Continuity
Continuity
No
No
connect connec
ct
connector E-02
tor E-02
of logic unit
of logic unit
Continuity
Continuity
No
No
CAN
CAN
nect
connector E-01
tor E-01
to logic unit, then turn on
to logic unit, then turn on
46)
contactor CLOSE or OPEN.
side traction inverter, when restarting after motor shorted
(4) Secure cable if loose
(4) Secure cable if loose
or
or
more
more
inverter for
ter for
(6) Measure resistance between terminals of both cable
(6) Measure resistance between terminals of both cable
ends (between U and U, V and V, and W and W)
ends (between U and U, V and V, and W and W)
(8) Connect connector securely
(8) Connect connector securely
(9)
(9) Repla
Replace left
ce left
traction motor
traction motor
(12) Secure DSP flat cable if loose
(12) Secure DSP flat cable if loose
Replace inverter if wire breaks
Replace inverter if wire breaks
continuity
continuity
continuity
continuity
(15) Repair or replace harness
(15) Repair or replace harness
occurs after pump contactor CLOSE. Line
side traction motor, faulty contact or
cable in left side traction
of logic unit, faulty DSP card of left side
DSP card of left side
flow when torque instruction is
Less
Less
than
than
1
1
Ω
Ω
1
1
Ω
Ω
or
or
(10) Replace motor cables
(10) Replace motor cables
501135
501135
2-49
2-49
traction
more
more
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