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Harness Check Procedure
1. Remove the Rear Cover and Left Cover.
2. Unplug the connector CN28 on the FCU.
3. Unplug the connectors CN A and CN B on the relay connector board located at the bottom of
Main Frame.
Harness from FCU
(CN A & B)
Relay connectors
4. Check the continuity of the harness pin by pin using a multimeter.
See below for what the correct allocation of all wires of the harness should be.
Check the continuity of the following.
A of CN28 to 4 of CN B
⇓
D of CN28 to 1 of CN B
Harness from PFU
A B C D E F G H I J
CN28 (to FCU)
View from the side without the plastic cover
⇓
Main Frame
Paper Feed Unit (PFU)
1 2 3 4 5 6
X
X
X
1 2 3 4
CN B
CN A
(to PFU)
E of CN28 to 6 of CN A
⇓
⇓
J of CN28 to 1 of CN A
RTB No. Multi-003
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X
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Troubleshooting
