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3719
16
3936
0
3936
14
4077
3
4765
2
4765
3
4765
4
4765
7
5456
3
5456
4
5541
1
5541
3
5541
4
DPF Soot Load – Moderate (level
2/3)
DPF Soot Load – Severe De-Rate
DPF– Regen duration above limit
AFTFP2 signal Out of Range HIGH
DOCIT signal does not agree with
other exhaust sensors
DOCIT signal Out of Range HIGH
DOCIT signal Out of Range LOW
DOCIT not increasing with engine
temperature
AFTFT signal Out of Range HIGH
AFTFT signal Out of Range LOW
TC1TOP pressure below minimum
TC1TOP signal Out of Range HIGH
TC1TOP signal Out of Range LOW
https://www.truck-manuals.net/
DIAGNOSTIC MANUAL
•
Level 2 DPF Regen required
•
Level 3 DPF plugged
•
Engine unable to build enough heat to
the DOC
•
DOC failure
•
DSI failure to inject fuel into the exhaust
•
DPF failure
•
AFTFP2 signal circuit OPEN or short to
PWR
•
Failed AFTFIS
•
DOCIT biased sensor or circuit
•
DOCIT signal circuit OPEN or short to
PWR
•
SIG GND circuit OPEN
•
Failed DPFOT sensor
•
DOCIT signal circuit short to GND
•
Failed DPFOT sensor
•
Biased DPFOT sensor or circuit
•
AFTFT signal circuit OPEN or short to
PWR
•
Failed AFTFIS
•
AFTFT signal circuit short to GND
•
Failed AFTFIS
•
Failed Exhaust Back Pressure valve
(Stuck open)
•
TC1TOP signal circuit OPEN or short to
PWR
•
SIG GND circuit OPEN
•
Failed TC1TOP sensor
•
TC1TOP signal circuit short to GND
•
Failed TC1TOP sensor
77
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