Mitsubishi FB13PNT, Quick Start Manual

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2-57 2-57
E-27 E-27
3 3 2 2
6 6 5 5
1 1
4 4
H-01(3W) H-01(3W)
1 1 2 2 3 3
4 4 5 5 6 6
E-38(4W) E-38(4W)
2 2 1 1
501145 501145
23 23 1 1
B B
CHAPTER 2 TROUBLESHOOTING FOR CONTROL CIRCUITS CHAPTER 2 TROUBLESHOOTING FOR CONTROL CIRCUITS
3. 3.23 23 Ac Acce cele lera rato tor Sen r Senso sor Fau r Fault (5 lt (51) 1)
Error code: 51 Error code: 51
Situation Situation
Display: "51". All Display: "51". All truck operations inhibited. Line contactor HOLD and ST contactor HOLD. truck operations inhibited. Line contactor HOLD and ST contactor HOLD.
Traction moto Traction motor and pump mo r and pump motor operation tor operation inhibited. If this fault o inhibited. If this fault occurs before S ccurs before ST contactor CLO T contactor CLOSE, all SE, all
operations inhibited except mast lowering operation. operations inhibited except mast lowering operation.
Possible Possible
cause
cause
Improper accelerato Improper accelerator pedal linkage, faulty r pedal linkage, faulty accelerator sensor, faulty main harness, faulty logic unit. accelerator sensor, faulty main harness, faulty logic unit.
Trigger of Trigger of
the error the error
code
code
Sensor 1 or 2 output is 0.2 V or lower, or 4.8 Sensor 1 or 2 output is 0.2 V or lower, or 4.8 V or higher. V or higher.
Difference in output betwe Difference in output between sensors 1 and 2 is en sensors 1 and 2 is 0.5 V or more. 0.5 V or more.
Checks Checks
(8) Check continuity between E-02-24 and E-19-3(55) (8) Check continuity between E-02-24 and E-19-3(55)
Check continuity between E-02-23(54) and E-19-5(54) Check continuity between E-02-23(54) and E-19-5(54)
Continuity Continuity No No continuity continuity
(4) Perform inverter discharging work (4) Perform inverter discharging work
(7) Check continuity between E-02-20 and E-19-6(52) (7) Check continuity between E-02-20 and E-19-6(52)
Check Check continuit continuit y between y between E E -02-21 -02-21 and E-19-2(53) and E-19-2(53)
(Sensor voltage) (Sensor voltage)
Continuity Continuity No No continuity continuity
(2) Disconnect battery plug (2) Disconnect battery plug
(5) Adjust accelerator pedal linkage (5) Adjust accelerator pedal linkage
(6) D (6) D isco isco nnect con nnect con nectors nectors E-19 E-19 and E- and E- 02 02 of logic unit of logic unit
(1) Raise front wheels until they clear floor (1) Raise front wheels until they clear floor
(3) Check link length of accelerator pedal (3) Check link length of accelerator pedal
Normal Abnormal Normal Abnormal
(9) Repair or replace harness (9) Repair or replace harness
With service tool With service tool
Without Without
service tool service tool
(10) Replace accelerator pedal (10) Replace accelerator pedal
(13) C (13) C onnect connector E onnect connector E -19 -19 and E-02 and E-02 Turn on power Turn on power and and check check voltage between E-19-3(55) voltage between E-19-3(55) and E-19-5(54) and E-19-5(54)
5 5 V V Not Not 5 5 V V
(15) Turn off power (15) Turn off power
O E 19 3(55) d E 19 6(52) E 19 2(53) O E 19 3(55) d E 19 6(52) E 19 2(53)
(14) Turn off power. Short-circuit E-19-3(55) and (14) Turn off power. Short-circuit E-19-3(55) and
E-19- E-19- 6(52) 6(52) , E-19- , E-19- 2(53) 2(53)
Turn on power and check accelerator voltage with service tool Turn on power and check accelerator voltage with service tool
5 5 V V Not Not 5 5 V V
(11) Disconnect battery plug (11) Disconnect battery plug
(12) Reinstall accelerator pedal, then replace logic card of (12) Reinstall accelerator pedal, then replace logic card of
logic unit logic unit
If fault remains If fault remains