08 ATS-12

08 ATS-12
NUMBER: 08 ATS–12
S.M. REF.: 13.3
ENGINE: ATS
DATE: August 2008
SUBJECT: UPDATE TO SPN 3251/FMI 16
PUBLICATION: DDC-SVC-MAN-0036
SPN 3251/FMI 16 has changed to now troubleshoot the general DPF pressure instead of only the outlet
pressure.
SPN 3251/FMI 16
This diagnostic condition is typically DPF Pressure Out Of Range high.
CHECK FOR DPF PRESSURE OUT OF RANGE HIGH
Check as follows:
1. Disconnect the DPF Inlet Pressure hose assembly.
2. Connect DDDL 7.X.
3. Turn ignition ON (key ON, engine OFF).
NOTE:
Do not start the engine.
4. Access the Voltage Service Routine.
5. Select “Start Acquiring.”
6. Monitor the DPF Inlet Pressure Sensor voltage (P_DPF_IN).
7. Is the voltage between 0.44 – 0.56 volt?
[a]
If yes, go to step 9.
[b]
If no, go to step 8.
8. Inspect the electrical connections upstream of the MCM (sensor, ATD harness 10-pin connector,
VIH 31-pin connector, and MCM 120-pin connector) for corrosion and spread pins.
[a]
If corrosion or damaged or bent pins are found, repair as necessary.
Verify repairs.
[b]
If no corrosion or damage is found, replace the DPF Inlet Pressure Sensor. Verify repairs.
9. Turn ignition OFF.
10. Inspect the DPF Inlet Pressure hose and fittings for kinks, blockage, and restrictions.
[a]
If blockage or damage is found, repair the DPF Inlet Pressure hose and fittings as necessary.
Verify repairs.
[b]
If no obstructions are found, reconnect the DPF Inlet Pressure hose assembly.
ENGINE EXHAUST
To avoid injury from inhaling engine exhaust, always operate
the engine in a well-ventilated area. Engine exhaust is toxic.
11. Start engine.
12. Access the DPF Regeneration Service routine.
HOT EXHAUST
During parked regeneration the exhaust gases will be
extremely HOT and could cause a fire if directed at
combustible materials. The vehicle must be parked outside.
13. Select “Send Parked Regeneration Start Request.”
NOTE:
Regeneration safety entry conditions must be met before a regeneration can begin.
14. When regeneration is complete, clear all fault codes.
15. Road test vehicle.
[a]
If no fault codes appear, testing is complete. Verify repairs.
[b]
If the fault code returns, go to step 16.
16. Remove ATD.
17. Perform a DPF filter inspection for excessive soot loading. Possible causes of soot
contamination are:
□ Charge Air Cooler and associated piping
□ EGR valve stuck open
□ Turbo actuator (Perform nozzle sweep test.)
□ Damaged turbo blades/vanes
18. Make necessary repairs for soot loading; replace DPF filter and re-install ATD. Verify repairs.
ADDITIONAL SERVICE INFORMATION
Additional service information is available in the Detroit Diesel ATS Technician's Guide
(DDC-SVC-MAN-0036). The next revision to this manual will include the revised information.
Detroit Diesel®, DDC®, Series 60® and the spinning arrows design are registered trademarks of Detroit Diesel Corporation.
© Copyright 2008 Detroit Diesel Corporation. All rights reserved. Printed in U.S.A.
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