6/02
2-54
DC1632/2240
4-348
Prelaunch Training/Review
Status Indicator RAPs
4-348 IBT Belt Edge
IBT Belt Edge not detected.
Procedure
BSD: CH9.19 CH9.31A
Check if actuator for IBT Edge Sensor touches belt edge. IBT Edge Sensor touches belt
edge.
YN
Check actuator installation.
Turn the power ON. Between I/F PWB j533-A11(+) and GND(-). Between +3 VDC and 1
VDC is measured.
YN
Between I/F PWB j533-A9(+) j533-A10(-). +5 VDC is measured.
YN
Close FRONT door. If voltage between j533-A9(+) j533-A10(-) is less than +5VDC,
replace MCU PWB (PL 13.1).
Between I/F PWB j533-A11(+) and GND(-). +5 VDC is measured.
YN
Between I/F PWB j533-A11(+) and GND(-). 0 VDC is measured.
YN
Check wire breakage and bad connection between I/F PWB j533and IBT Edge
Sensor j119.
If the check is good, replace IBT Edge Sensor (PL 5.4).
If the problem continues, replace MCU PWB (PL 13.1).
Check wire breakage and bad connection between I/F PWB j533-A11 and IBT Edge
Sensor j119-2.
Replace IBT Edge Sensor (PL 5.4).
Between I/F PWB j550-5(+) and GND(-). +24 VDC is measured.
YN
Following Wire Network, check +24VDC circuit up to I/F PWB j550-5.
Remove IBT Assembly. Enter dC330 [004-001] and energize the Steering Motor. Steering
Motor energized.
YN
Check wire breakage and bad connection between I/F PWB j550 and IBT Steering Motor
j207. There are broken wires or bad connections.
YN
Replace MCU PWB (PL 13.1). If the problem continues, replace I/F PWB (PL 9.1),
and IBT Steering Motor (PL 1.3).
Repair broken wire and bad connection.
Check IBT Belt installation (REP 9.22). If the check is good, replace MCU PWB (PL 13.1).
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