Error Messages and Codes 3-31
Fuser STS (Rear) Warm Time Failure, Code 46
Sub-heater warm-up error. The temperature did not reach “Ready” temperature within 
the specified time.
Fuser SSR2 On Time Failure, Code 47
The Sub-heater remained ON for more than the specified time.
Troubleshooting References 
Applicable Parts Wiring and Plug/Jack Map References
■ Fuser
■ Engine Control Board
Troubleshooting Procedure 
Step Actions and Questions Yes No
1
1. Turn OFF power, remove the fuser 
assembly and allow it to cool down.
2. Measure the resistance between the 
Fuser connector P600-7 and P600-9.
3. Does the resistance measure between 
30 K and 190 K Ohms?
Go to step 2. Replace the fuser 
assembly.
2
1. Measure the resistance between fuser 
connector P600-3 and P600-12.
2. Does the resistance measure 20 Ohms 
or less?
Go to step 3. Replace the fuser 
assembly.
3
1. Reinstall the fuser assembly.
2. Enter service diagnostics.
3. From the Sensor Tests run the Fuser 
Temperature test.
4. Is the temperature indicated 
approximately 165
o
C?
Go to step 5. Go to step 4.
4
1. Turn printer power OFF.
2. Check for an open circuit or poor 
connection between J641-4 and 
J641-5.
3. Is the wiring harness OK?
Replace the 
engine control 
board.
Repair or replace 
the wiring 
harness.