Check Delta P Sensor and Barometric Sensor - ddcsn.com

1 SERIES 60 EGR TECHNICIAN'S MANUALE xhaust Gas Recirculation System Basic ChecksPerform the following basic steps to Check the exhaust gas recirculating all EGR related concerns (may include exhaust smoke complaints), perform the followingsteps. If any corrections are made as a result of these checks, test the unit again before proceedingfurther:Basic checks for all Series 60 EGR engines require the following tools: 1,000 Ohm resistor (low watt) DDR suite 8 or DDDL version or higher Volt Ohm Meter Pressure gage 0-200 psi Pressure gage 0-100 psiCheck Delta P Sensor and Barometric SensorFollow these steps to Check the Delta P Sensor and Barometric Sensor :1. Remove the Delta P Sensor from the mounting INJURYTo avoid injury fromflying debris when using compressed air,wear adequate eye protection (face shield or safety goggles)and do not exceed 276 kPa (40 psi) air Blow down through the Sensor tubes (by way of the holes in the mounting plate) usingan Gently shake the Sensor to remove any moisture before reinstalling.

2 Moisture in thesensor does not cause permanent Turn ignition On. (key ON, engine OFF).5. Connect either a Detroit Diesel Diagnostic Link (DDDL) or a Diagnostic Data Reader(DDR).6. Read the Delta P counts.[a] If the recorded Delta P counts read 86-118,verify that the venturi tube hoses-to-DeltaP Sensor , are correctly installed and arenot damaged. Repair as necessary, verifyrepairs. Visually inspect the delivery pipe for damage and proper assembly. If noproblem was found, perform a Check VPOD Output Pressure Test found in thenext information subject to change without notice.(Rev. November 2005)5-97SE60 0506 Copyright 2005 DETROIT DIESEL CORPORATION From Bulletin 1-60 EGR-05 DDEC IV TESTINGNOTE:Reversed and damaged hoses will have an adverse effect on engine performanceresulting in black exhaust smoke and engine surging.[b] If the Delta P counts are out of the 86-118 range, replace the Sensor and go tothe Verification Measure and record Barometric Sensor pressure and compare recorded value to the intakepressure Sensor value.

3 [a] If the Sensor readings differ more kPa ( psi), replace the barometricsensor.[b] If the Sensor readings do not differ more than kPa ( psi), task is VPOD Output PressureFollow these steps to Check the VPOD input and output pressure:NOTE:Listen for air leaks at the VPOD during the From Bulletin 1-60 EGR-05 All information subject to change without notice.(Rev. November 2005)7SE60 0506 Copyright 2005 DETROIT DIESEL CORPORATIONSERIES 60 EGR TECHNICIAN'S MANUALPERSONAL INJURYTo avoid injury from the sudden release of a high-pressurehose connection, wear a face shield or Disconnect the air hoses from the EGR and VNT (Variable Nozzle Turbine) Install pressure gauges (accurate to within kPa [ psi]) at the outlet of the EGR andVNT hoses. (Use two gauges, or test separately.)3. Using the DDDL/DDR, activate PWM #2 (EGR) and PWM #4 (VNT) duty cycles andmonitor the output pressure from the Test: activating 11% duty cycle: Pressure = 106-134 kPa ( psi).

4 Go to steps5[a] and 5[b].All information subject to change without notice.(Rev. November 2005)5-117SE60 0506 Copyright 2005 DETROIT DIESEL CORPORATION From Bulletin 1-60 EGR-05 DDEC IV TESTING5. Test: activating 90% duty cycle: Pressure = 485 - 515 kPa (70-75 psi).[a] If the VPOD readings are as listed, Check for active codes. Refer to the Check forActive Codes section.[b] If the results in this step cannot be attained, Check VPOD input pressure. Refer to the Check VPOD Input Pressure :Both activations must operate their component with full travel of the linkage to hit Variable Output Pressure Device Input PressureTesting steps are as Measure the VPOD input pressure to port 1; ensure it is between 703-1296 kPa (90 120 psi).[a] If the supply pressure is less than 703-1296 kPa (90-120 psi), troubleshoot the vehicleair system until that result is obtained.

5 [b] If the supply pressure is greater than 703-1296 kPa (90-120 psi), Check the VPOD part number (P/N) and supply voltage. Refer to the Check Variable Output PressureDevice Part Number and Supply Voltage Perform a Check Variable Output Pressure Device Part Number and Supply Voltage . Check Variable Output Pressure Device Part Number and Supply VoltageThe following checks should be performed for the VPOD part number and supply voltage:1. Check the VPOD label to determine if it is +12V or +24V Unplug VPOD's mating connector. A 1,000 Ohm resistor is needed for the next step. Insertthe resistor between cavity 1 and 3 for ease of checking with the volt ohm meter (VOM)[a] Turn ignition switch ON.[b] Measure voltage from pin 3 to pin 1.[c] Plug in either DDDL or DDR and Check ECM Is the VPOD P/N and voltage, and ECM voltage correct?[a] If the VPOD P/N and voltage are correct, Check VPOD wiring.

6 Refer to the CheckVPOD Wiring section.[b] If the VPOD P/N and voltage are not correct, contact the DDC Customer SupportCenter at From Bulletin 1-60 EGR-05 All information subject to change without notice.(Rev. November 2005)7SE60 0506 Copyright 2005 DETROIT DIESEL CORPORATIONSERIES 60 EGR TECHNICIAN'S MANUALC heck VPOD WiringThe following checks should be performed for the VPOD :VPOD power should have been verified under the part number Check . If not, refer to the Check Variable Output Pressure Device part number and Supply Voltage Turn ignition switch Unplug the VPOD mating Insert a 1,000 ohm resistor between cavities #2 and #1 for the +12V version, or cavities#2 and #3 for the +24V Connect a VOM to the VPOD connector between pin #2 and pin #3 for the 12V VPODor pin #2 and pin #1 for the 24V Using DDDL or a DDR, activate the PWM #2 (EGR Valve) and PWM #4 (VNT), andensure:[a] Activating 11% duty cycle: VDC = 90%of the VPOD supply voltage 1 volt ( ,voltage to VPOD = * = ; therefore to at PWMis acceptable).

7 [b] Activating 90% duty cycle: VDC = 10% of the VPOD supply voltage 1 volt.( , voltage to VPOD = * = , therefore to at PWMis acceptable.)6. Note any air leakage when PWMs are activated to 90% and correct the leaks as needed.[a] If both of the PWM voltage measurementsare correct, replace the VPOD that had thewrong pressure reading.[b] If the PWM voltage measurements are incorrect, and the wiring checks are okay, trya test ECM programmed for EGR, or contact the DDC Customer Support Centerat information subject to change without notice.(Rev. November 2005)5-137SE60 0506 Copyright 2005 DETROIT DIESEL CORPORATION From Bulletin 1-60 EGR-05 DDEC IV TESTINGC heck for Active CodesCheck for active codes as follows:1. Turn ignition Plug in DDDL or a Read active Record or print codes. Ensure that PID, SID, and FMI are recorded. Refer to the propercode section of theDDEC III/IV Single ECM Troubleshooting Guide, (6SE497) totroubleshoot that :FMIs listed as 14 are diagnostic information codes and no troubleshooting is example, an engine derates due to high TCO temperature; a 404/14 code will bestored.

8 This would indicate that conditions warranted having the ECM derate the fuelingto the engine. If the customer complaint was a power loss, it could be explained that lossof power was done by the ECM to protect other engine If the issue is not related to the EGR system components, or if assistance is needed, contactDetroit Diesel Customer Support Center at these steps to test:1. Reassemble connectors or Start and run the Perform a road test if this is necessary to duplicate original complaint.[a] If symptoms/codes are gone, repairs are complete.[b] If any codes display, review this section again; contact Detroit Diesel CustomerSupport Center at From Bulletin 1-60 EGR-05 All information subject to change without notice.(Rev. November 2005)7SE60 0506 Copyright 2005 DETROIT DIESEL CORPORATION