All information subject to change without notice. Verify repairs by running SCR ADS Self Check Routine. Refer to section "Removal of the Diesel Exhaust Fluid Metering Unit". Acceptable DEF Pressure: greater than 9000 mbar, DEF Pressure less than mbar ( psi). Acceptable DEF Pump Speed: greater than 750 rpm, DEF Pump Speed less than 1800 rpm. Copyright 2012 DETROIT DIESEL CORPORATIONĥ Table 4. Did the SCR ADS test pass with DEF pump speed and DEF pressure values in normal range? 6 All information subject to change without notice. Perform Selective Catalytic Reduction Airless Dosing System (SCR ADS) Self Check Routine.
WARNING: EYE INJURY To avoid injury from flying debris when using compressed air, wear adequate eye protection (face shield or safety goggles) and do not exceed 276 kpa (40 psi) air pressure. If damage is found, repair as necessary Go to step 6. If no pin damage is found, Go to step Visually check DEF return line from DEF Dosing Unit to DEF Tank for physical damage (kinks, cracks, leaks, disconnect). If only SPN 4374/FMI 1 is present, Go to step Inspect the DEF Dosing Unit and DEF pump harness wiring and connector for damage, wire chafing, bent, spread or corroded pins. If other faults are active, in addition to SPN 4334/FMI 3,4 or SPN 4374/FMI 3,4 troubleshoot the other faults first. Turn the ignition ON (key ON, engine OFF). DEF Pressure DEF pump enabled OR on-off-cycle request Continuous when enabling conditions met 2 minutes MIL, CEL None SCR ADS Self-check NOTE: Retain a log file if Detroit Customer Assistance is required.
#Spn 4374 fmi 0 verification
Description Monitored Parameter Typical Enabling Conditions Execution Frequency Typical Duration Dash Lamps Engine Reaction Verification SPN 4374/FMI 1 Over pressurized DEF system DEF pump speed vs. 5 Copyright 2012 DETROIT DIESEL CORPORATIONĤ /FMI 1 GHG14 /FMI 1 GHG14 This diagnostic is typically an Over Pressurized Diesel Exhaust Fluid (DEF) System.
No contact Detroit Customer Support Center for further instruction. Yes, verify repairs and release the vehicle. Did SCR ADS Self Check Routine complete successfully? a. Perform SCR ADS Self Check Routine to prime the system. No Go to step Replace the Pressure Relief Valve (PRV). Did the SCR ADS test pass with DEF pump speed and DEF pressure values in normal range? a. Copyright 2012 DETROIT DIESEL CORPORATIONģ Table 2. 4 All information subject to change without notice. If no restriction is found, Go to step 9. Use shop air to blow out any remaining water and contamination. If debris is found, flush DEF Tank Header filter with warm water. Refer to section "Removal of the GHG14 13 and 23 Gallon Diesel Exhaust Fluid Tank Header Unit". Remove DEF Tank Header and inspect DEF supply filter.
No Go to step Visually check all DEF lines for physical damage (kinks, cracks, leaks, disconnects).
#Spn 4374 fmi 0 manual
Yes refer to Original Equipment Manufacturer (OEM) appropriate manual for DEF tank cleaning/flushing procedure. Do the test strips indicate contamination? a. If no pin damage is found, Go to step Using DEF test strip A to check for diesel fuel or oil contamination of the DEF fluid. If only SPN 4374/FMI 0 is present, Go to step Inspect the DEF dosing unit and DEF pump harness wiring and connector for damage, wire chafing, bent, spread or corroded pins. If other faults are active, including SPN 4334/FMI 3, 4, or SPN 4374/FMI 3, 4 troubleshoot the other faults first. DEF Pressure Monitor Sequence None Execution Frequency Continuous when enabling conditions met Typical Duration Continuous until resolved Dash Lamps MIL, CEL Engine Reaction Derate 25% Verification ADS Self Check NOTE: Retain a log file if Detroit Customer Assistance is required.
SPN 4374/FMI 0 Description This diagnostic is typically an under pressurized DEF system Monitored Parameter DEF pump speed vs. 2 /FMI 0 GHG14 /FMI 0 GHG14 This diagnostic is typically an Under Pressurized Diesel Exhaust Fluid (DEF) System.
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