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Trouble code
Description
Main
code
Sub
code
L4
01
Content Main motor lock detected
Detail
Motor lock signal is detected for 1.5
seconds during main motor rotation
Cause
Main motor defective
Improper connection of harness between
PCU PWB and main motor
Control circuit defective
Check
and
remedy
Check main motor operation with SIM25-1.
Check harness and connector between
PCU PWB and main motor.
L4
02
Content Drum motor lock detected
Detail
Motor lock signal is detected for 1.5
seconds during drum motor rotation.
Cause
Drum motor defective
Improper connection of harness between
PCU PWB and drum motor
Control circuit defective
Check
and
remedy
Check drum motor operation with SIM25-1.
Check harness and connector between
PCU PWB and drum motor.
L6
10
Content Polygon motor lock detected
Detail
It was judged that there is no output of
polygon motor lock signal of LSU.
The lock signal was checked at about
10-second intervals after the polygon
motor started rotating. As result, it was
judged that the polygon motor failed to
operate normally.
Cause
Disconnected connecter to LSU or
detached harness inside LSU or broken
wire.
Polygon motor defective
Check
and
remedy
Check polygon motor operation with
SIM61-1.
Check harness and connector for
connection. Replace LSU if needed.
U3
00
Content Mirror motor PWB communication trouble
Detail
Communication with mirror motor PWB
cannot be established.
Cause
Mirror motor PWB defective
Defective harness or connector between
PCU and mirror motor PWB
Erroneous detection due to noise
Check
and
remedy
Check harness and connector of
communication line.
Replace mirror motor.
Clear the trouble by turning power supply
On/Off.
U3
20
Content Mirror motor RE error
Detail
No generation of RE signal for a certain
time despite the activation of mirror motor.
Cause
Mirror motor defective
RE defective
Mirror motor locked
Check
and
remedy
Check mirror motor operation with SIM1-1.
Check RE signal with SIM1-2.
Trouble code
Description
Main
code
Sub
code
U3
21
Content Mirror motor MHPS detection error
Detail
No MHPS is not detected when mirror field
is started.
MHPS is detected when mirror field is
started.
Cause
MHPS defective
MHPS harness or connector defective
Check
and
remedy
Check MHPS signal with SIM1-2.
U3
26
Content Mirror motor power supply error
Detail
Mirror motor power supply voltage judged
to be improper when mirror initial or mirror
field is started.
Cause
Mirror motor PWB defective
Mirror motor power supply circuit defective
DC power supply defective
Improper connection of harness for
supplying mirror motor DC38V
Check
and
remedy
Check mirror motor power supply with
SIM1-2.
Check harness and connection for
supplying mirror motor DC38V.
U4
02
Content ADU alignment plate operation error
Detail
The plate won’t move from home position
more than 1 second after sending the
command to leave home position. Or the
plate won’t return to home position within 5
seconds after sending the command to
return to home position.
Cause
Home position sensor defective
Alignment shift motor defective
Improper connection of harness between
PCU PWB, motor and sensor.
Control PWB (PCU) defective
Alignment plate driving belt or gear
damaged or improperly adjusted
Check
and
remedy
Check home position sensor detection with
SIM9-2.
Check alignment plate operation with
SIM9-4.
Check connection between PCU, motor
and sensor.
Remove ADU and check gear and belt for
damage.
U4
03
Content ADU trailing edge plate operation error
Detail
The plate won’t move from home position
more than 1 second after sending the
command to leave home position. Or the
plate won’t return to home position within 5
seconds after sending the command to
return to home position.
Cause
Home position sensor defective
Trailing edge plate shift motor defective
Control PWB (PCU) defective
Trailing edge plate driving belt or gear
damaged or improperly adjusted.
Check
and
remedy
Check home position sensor with SIM9-2.
Check trailing edge plate operation with
SIM9-3.
Check connection between PCU PWB,
motor, and sensor.
Remove ADU and check gear and belt for
damage.
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