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Chapter 2 Troubleshooting
FIP-1.56 042-325: IOT Main Motor Failure
Step Check
Remedy
Yes No
Possible causative parts:
DRIVE ASSY MAIN (PL7.1.2)
PWBA MCU (PL8.3.6)
HARNESS ASSY MAIN MOT MG AIO (PL9.1.7)
1
Does the error occur when the power is turned OFF and
ON?
Go to step 2. End of work.
2
Checking after resetting the PHD ASSY.
Reseat the PHD ASSY.
Does the error still occur when the power is turned OFF and
ON?
Go to step 3. End of work.
3
Checking the Main Motor for rotation.
Does the Main Motor function normally?
- PC Operation :
Checked by [Main Motor Operation Check] of the [Machine
Check] in Tool Box.
- Panel Operation :
Checked by [Digital Output] - [Main Motor] of [IOT Diag] in
diagnosis.
Replace the KIT
PWBA MCU.
(Refer to
REP8.10.)
Go to step 4.
4
Checking the connectors of the MAIN MOTOR for
connection.
Check the connections between the PWBA MCU and
DRIVE ASSY MAIN.
Are P/J21 and P/J211 connected correctly?
Go to step 6.
Reconnect the
connector(s) P/
J21 and/or P/J211
correctly, then go
to step 5.
5
Does the error still occur when the power is turned OFF and
ON?
Go to step 6. End of work.
6
Checking the HARNESS ASSY MAIN MOT MG AIO for
continuity.
Disconnect J21 from the PWBA MCU.
Disconnect J211 from the DRIVE ASSY MAIN.
Is each cable of J21 <=> J211 continuous?
Go to step 7.
Replace the
HARNESS ASSY
MAIN MOT MG
AIO.
7
Checking after resetting the DRIVE ASSY MAIN.
Reseat the DRIVE ASSY MAIN.
Does the error still occur when the power is turned OFF and
ON?
Go to step 8. End of work.
8
Checking the power to the DRIVE ASSY MAIN.
Disconnect J21 from the PWBA MCU.
Are the voltages across J21-2pin/J21-4pin <=> ground on
the PWBA MCU, about +24 VDC when the interlock switch
(HARN ASSY INTERLOCK AIO) is pushed?
Replace the KIT
DRIVE ASSY
MAIN. (Refer to
REP7.2.)
Replace the KIT
PWBA MCU.
(Refer to
REP8.10.)
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