Navistar N9 Diagnostic Manual page 25

1 DIAGNOSTIC TROUBLESHOOTING PROCEDURES
SPN FMI Sub-section
5109 4 DCU (page 475)
5109 19 DCU (page 475)
5246 15 DEFTLT (page 746)
5298 17 AFT (page 156)
5298 18 AFT (page 156)
5302 18 Ammonia (page 338)
5319 31 AFT (page 156)
5394 2 DEF: DU (page 554)
5394 5 DEF: DU (page 554)
5394 7 DEF: DU (page 554)
5395 0 Engine (page 1132)
5395 1 Engine (page 1132)
5397 31 DPF (page 840)
5456 2 AFTFIS (page 226)
5456 3 AFTFIS (page 226)
5456 4 AFTFIS (page 226)
5491 3 DEF: LHR (page 570)
5491 4 DEF: LHR (page 570)
5541 2 EBPV (page 930)
5541 3 EBPV (page 930)
5541 4 EBPV (page 930)
5542 15 EBPV (page 930)
5542 17 EBPV (page 930)
5543 3 EBPV (page 930)
5543 4 EBPV (page 930)
5543 5 EBPV (page 930)
5742 3 DOC (page 800)
5742 4 DOC (page 800)
5742 11 DOC (page 800)
5742 16 DOC (page 800)
5742 19 DOC (page 800)
5743 3 SCR (page 1907)
5743 4 SCR (page 1907)
Condition Description
DCU battery voltage below 10 volts
DCU not detected on J1939
SCR Tamper Proof Inducement Level 1 status
DOC Efficiency fault, Temperature below minimum Regen
Aborted
DOC Efficiency fault, Temperature below minimum
Post SCR NH3 Conversion Efficiency - Data Valid But Below
Normal Operating Range - Moderately Severe Level
DPF incomplete regeneration
DEF Dosing below desired (Low NOx conversion across
SCR)
DEF Doser Valve open load/circuit
DEF Dosing Unit - Mechanical system not responding
Engine unable to achieve desired idle torque (too high)
Engine unable to achieve desired idle torque (too low)
DPF regenerations are occurring too frequently
AFTFIT signal erratic, intermittent, or incorrect
AFTFT signal Out of Range HIGH
AFTFT signal Out of Range LOW
DEF Line Heater Relay Open or short to PWR
DEF Line Heater Relay short to GND
TC1TOP signal erratic, intermittent or incorrect
TC1TOP signal Out of Range HIGH
TC1TOP signal Out of Range LOW
TC1TOP Above Desired
TC1TOP Below Desired
EBPC short to PWR
EBPC short to GND
EBPC open load / circuit
DPF Thermocouple Controller Out of Range HIGH
DPF Thermocouple Controller Out of Range LOW
DPF Thermocouple Controller signal erratic, intermittent, or
incorrect
DPF Thermocouple Controller above Maximum Temperature
DOC/DPF Temperature module not detect J1939
SCR Thermocouple Controller Out of Range HIGH
SCR Thermocouple Controller Out of Range LOW
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