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@ DETROIT

Service Information Bulletin

2 30-14

SUBJECT

DATE
SPN 4375/FMI 6 - EPA10 February 2014
Additions, Revisions, or Updates
Publication Number / Title Platform Section Title Change
EPA10 DD SPN 4375/FMI 6 -
DDC-SVC-MAN-0084 The procedures are updated in numerous locations.
Platform EPA10

@

DETROIT

DEMAND PERFORMANCE”

13400 Outer Drive, West, Detroit, Michigan 48239-4001
Telephone: 313-592-5000
www.demanddetroit.com

All information subject to change without notice.

230-14 Copyright © 2014 DETROIT DIESEL CORPORATION
2 SPN 4375/FMI 6 - EPA10

2 SPN 4375/FMI 6 - EPA10

This diagnostic is typically Diesel Exhaust Fluid (DEF) Pump Supply Current High.

This code sets when the electrical current to the pump is greater than 900 mA for 10 seconds for 10 consecutive times.

Table 1.

SPN 4375/FMI 6

Description

DEF Pump Supply Current High

Monitored Parameter

DEF Pump Supply Current

Typical Enabling Conditions

Dosing Enabled, Ambient Temperature is Greater Than 0°C (32°F)
or Dosing Enabled, Ambient Temperature is Less Than -5°C (23°F)
and DEF Pump/Tank Heater is Commanded On

Monitor Sequence

None

Execution Frequency

Continuous when enabling conditions met

Typical Duration 10 Seconds
Dash Lamps MIL, CEL
Engine Reaction Derate 25%
Verification SCR Air Pressure Test
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1. Connect DiagnoticLink™,
2. Turn the ignition ON (key ON, engine OFF).
3

. Check for other fault codes. Are there any low air pressure or circuit codes for the DEF system?

a. Yes; diagnose and repair the other fault codes first. Verify repair.

b. No; Go to step 4.
4. Is the DEF tank temperature above 0°C (32°F)?

All information subject to change without notice.

Copyright © 2014 DETROIT DIESEL CORPORATION 2 30-14

2 30-14

a. Yes; Go to step 5.
b. No; start and run the engine until DEF tank temperature is above 0°C (32°F), then turn ignition OFF and wait ten

minutes for modules to fully power down. Go to step 5.
To avoid i injury from inhaling engine exhaust, always operate the © engine ina well-ventilated area.

A Engine exhaust | is S toxic.

|. WARNING: ‘PERSONAL INJURY oe ER |
4 ‘To avoid i injury before starting and running the engine, ensure the vehicle is parked on a level

_ Surface, parking brake i is set, and the wheels are blocked,

WARNING: ENGINE EXHAUST

5. Start and run the engine while monitoring the air pressure in the secondary system. Does the air pressure reach and
maintain 690 kPa (100 psi)?
a. Yes; Go to step 6.
b. No; refer to air compressor diagnostic literature to correct the lack of air pressure. Verify repair.

6. Turn ignition OFF; wait five minutes for purge cycle to complete. Go to step 7.

NOTE: When performing the SOR air pressure test, ensure that the vehicle air pressure is s above ‘690 kPa (100
psi).

7. Perform the Selective Catalytic R Reduction (SCR) air pressure test service routine (test duration is 60 seconds). After
completion of test, graph ACM2 parameter AS027 DEF pump current. Does the DEF pump current rise and remain
high for duration of the test?

a. Yes; Go to step 8.

b. No; repeat test two times if current does not rise and stay high. There may have been a restriction in the DEF
supply to the pump. Perform the SCR air pressure test to verify the correct operation of the system. Release the
vehicle.

c. This figure illustrates the normal reaction of a good pump.

48027 DEF Pump
Current will spike then

drop off. This is the
normal reaction.
NOTE: Graph shows
test was performed
three times.

d500017

d. This figure illustrates an issue in the system.

All information subject to change without notice. 5
230-14 Copyright © 2014 DETROIT DIESEL CORPORATION
2 SPN 4375/FMI 6 - EPA10

soe

AS027 DEF Pump
Current remains high
fe Gama for the duration of the
“ test. This is an issue.
® NOTE: Graph shows

test was perform
© DPeomtage three times.

£AS01G" DEF Ar
18017: DEF
CyAso92

8 EsTempe ater

d500013

8. Compare DEF pressure to ambient air pressure (bar) and DEF air pressure. Is the DEF pressure within 27.5 kPa (4 psi)
of the ambient air pressure and DEF air pressure?

a. Yes; Go to step 9.
b. No; replace the DEF pressure sensor; Refer to section "Removal of the Diesel Exhaust Fluid Pressure Sensor".
Verify repair.
9. Turn the ignition OFF. Go to step 10.

10. Inspect Pressure Limiting Unit (PLU) air line routing: air supply to the DEF pump and DEF metering unit, air supply
from the air tank. Is the air line routing correct as per the diagram?

d140326a

a. Yes; Go to step 11.
b. No; correct the air line routing. Verity repair.

| WARNING: PERSONAL INJURY LE pe OE gs ea nich Gh be
To avoid injury fromthe sudden release. of a high-pressure I hose connection, wear a face shield or

goggles.

6 All information subject to change without notice.
Copyright © 2014 DETROIT DIESEL CORPORATION 2 30-14
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11. Visually/audibly inspect air feed lines from air tank to the Pressure Limiting Unit, and from unit to DEF pump and
metering unit for leaks, kinks, cracks, melting or other damage. Is there any damaged, kinked, melted or cracked lines?

a. Yes; repair as necessary. Verify repair.
b. No; Go to step 12.

12. Disconnect the air supply line at the DEF pump (1). Go to step 13.

13. Connect a suitable air gauge to the DEF pump air pressure supply line. Go to step 14.

14. Turn the ignition ON (key ON, engine OFF).

15. Perform the SCR air pressure test while monitoring the air pressure gauge installed on the DEF pump supply line. Is the

air pressure between 517 to 586 kPa (75 to 85 psi)?

a. Yes; remove the air pressure gauge and reinstall the DEF pump air pressure line. Go to step 16.
b. No; repair the restriction between the Pressure Limiting Unit (PLU) and the DEF pump.

16. Turn the ignition OFF. Go to step 17.

17. Disconnect the DEF pump harness connector. Go to step 18.

18. Measure the resistance across the DEF pump pins 1 and 2. Is the resistance greater than 400 ohms?
a. Yes; replace the DEF pump. Verify repair.
b. No; reconnect the DEF connector. Go to step 19.

19. Disconnect the DEF tank return line from the DEF pump.

All information subject to change without notice. 7
230-14 Copyright © 2014 DETROIT DIESEL CORPORATION
2 SPN 4375/FMI 6 - EPA10

d140263

NOTE: It is normal to have some DEF leak from the outlet fitting after the SCR air pressure test hasbeen _
performed. SEES pa EO ep a aoe eee a

20. Visually watch the DEF tank return outlet fitting on the pump while running the SCR air pressure test (60 second
duration), Does DEF fluid discharge from the pump return outlet during the SCR air pressure test?
a. Yes; replace the DEF pump pneumatic switching valve. Refer to section "Removal of the Diesel Exhaust Fluid
Pump Module Pneumatic Switching Valve". Verify repair.
b. No; reconnect the DEF pump return line. Go to step 21.

21. Remove inlet line (1) from the DEF Pump

8 All information subject to change without notice.
Copyright © 2014 DETROIT DIESEL CORPORATION 2 30-14
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\

22. Inspect the DEF pump inlet line and fitting (1) for damage or a restriction. Is there any damage or a restriction present?
a. Yes; repair as necessary. Verify repair.
b. No; reinstall the DEF pump inlet line. Go to step 23.
23. Perform DEF quantity test service routine and record amount of DEF fluid level dispensed. Is the correct amount of
DEF dispensed?
a. Yes; replace the DEF pressure sensor. Refer to section "Removal of the Diesel Exhaust Fluid Pressure Sensor".

Verify repair.
b. No; replace the DEF pump. Refer to section “Removal of the Diesel Exhaust Fluid Pump Module". Verify repair.

All information subject to change without notice.
230-14 Copyright © 2014 DETROIT DIESEL CORPORATION