Exhaust Gas Recirculation System Basic Checks; Check Delta P Sensor And Barometric Sensor - Detroit Diesel Series 60 EGR Technician Manual

Exhaust Gas Recirculation System Basic Checks

Perform the following basic steps to check the exhaust gas recirculating system.
For all EGR related concerns (may include exhaust smoke complaints), perform the following
steps. If any corrections are made as a result of these checks, test the unit again before proceeding
further:
Basic checks for all Series 60 EGR engines require the following tools:
1,000 Ohm resistor (low watt)
DDR suite 8 or DDDL version 4.2 or higher
Volt Ohm Meter
Pressure gage 0-200 psi
Pressure gage 0-100 psi

Check Delta P Sensor and Barometric Sensor

Follow these steps to check the Delta P sensor:
1. Turn ignition ON.
2. Plug in DDDL or a DDR.
3. Read Delta P counts (EGR DPS)
[a] If Delta P counts read 86-135, verify that the EGR pipes and hoses are correctly
assembled from the EGR tube to the Delta P sensor. Reversed hoses or pipes will
create black smoke and surging. Go to step 3[b].
[b] Also inspect carefully for split or leaking pipes or hoses in the EGR mixer tube from
the EGR cooler to the intake manifold. If hoses and pipes are correct, perform. check
VPOD output pressure (refer to the next section).
[c] If counts do not fall within the 86-135 range, replace Delta P sensor; then go to the
"Verification" section.
4. Measure and record barometric sensor pressure and compare recorded value to the intake
pressure sensor value.
[a] If the sensor readings differ more than 4.14 kPa (0.6 psi), replace the barometric
sensor.
[b] If the sensor readings do not differ more than 4.14 kPa (0.6 psi), task is complete.
All information subject to change without notice. (Rev. June 2005)
7SE60 0506 Copyright © 2005 DETROIT DIESEL CORPORATION
SERIES 60 EGR TECHNICIAN'S MANUAL
5-9