08 DDEC VI–49
Contents
1. torque when the suspect cylinder is cut The common cylinder with the highest actual torque in both the dual and triple cylinder bank cutouts will contain the suspect fault j rempanion Cylinder Cutout Tripl Cylinder Cutout E E N i 14 2 3 4 5 6 d500004 Cylinder 5 would be suspect for over fueling Remove and replace injector assembly whose value is higher than the other five injectors Refer to section Removal of E3 Electronic Unit Injector in the Fuel System chapter of the EPAO7 Series 60 Service Manual DDC SVC MAN 0005 If disconnected reconnect the fan control solenoid Verify replaced injector assembly and clear the fault codes ADDITIONAL SERVICE INFORMATION Additional service information is available in the EPAO7 Series 60 Troubleshooting Guide DDC SVC MAN 0009 The next printed revision to this manual will include this information DETROIT DIESEL D CORPORATION te 13400 Outer Drive West Detroit Michigan 48239 4001 Telephone 313 592 5000 www detroitdiesel com 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 A2. B Ree ee 8 E d500002 A Low Power Condition will produce the lowest amount of torque increase when a faulty cylinder 1s manually cutout The engine will produce the greatest amount of torque increase when a fully contributing cylinder is manually cutout A Low Power Condition verified by the dual cylinder cutouts will cause the triple cylinder cutouts to show relatively low actual torque when the suspect cylinder is cut The common cylinder with the lowest actual torque in both the dual and triple cylinder bank cutouts will contain the suspect fault Companion Cylinder Cutout Triple Cylinder Cutout d500003 The low power cylinder here would be cylinder 5 Remove and replace injector assembly whose value is lower than the other five injectors Refer to section Removal of E3 Electronic Unit Injector in the Fuel System chapter of the EPAO7 Series 60 Service Manual DDC SVC MAN O0005 If disconnected reconnect the fan control solenoid Verify replaced injector assembly and clear the fault codes An Over Fueling Condition will produce the greatest amount of torque increase when a faulty cylinder is manually cutout The engine will produce the lowest amount of torque increase when a properly fueling cylinder is manually cutout An over fueling condition verified by the dual cylinder cutouts will cause the triple cylinder cutouts to show relatively high actual
3. DETROIT DIESEL DDEC VI Troubleshooting NUMBER 08 DDEC VI 49__ S M REF 3 3 ENGINE EPAO7 Series 60 DATE October 2008 SUBJECT DDDL MULTIPLE CYLINDER CUTOUT ROUTINE PUBLICATION DDC SVC MAN 0009 The DDDL Multiple Cylinder Cutout Routine has been added to the faulty fuel injector troubleshooting 3 3 FAULTY FUEL INJECTOR To determine if a faulty fuel injector is causing the cylinder to misfire use the DDDL 7 X Manual Cylinder Cutout Routine This test can be used to direct the technician to a cylinder with a fault such as a faulty injector or other mechanical damage broken piston ring perforated dome scored cylinder misadjusted valves etc NOTE Please be aware that the cylinder cutout test results will be inaccurate if the engine load changes during the test Therefore the engine fan air compressor air conditioning and other sources of variable load must also remain stable throughout the test NOTE The cylinders are identified by position and not by firing order A WARNING ENGINE EXHAUST To avoid injury from inhaling engine exhaust always operate the engine in a well ventilated area Engine exhaust Is toxic Start the engine Ensure the engine is at operating temperature Connect the vehicle to DDDL 7 X Check for fault codes if there are any fault codes repair them first Verify that A C front and rear if equipped and defrost is off E ae ee aes Turn the Fan on using the dash mounte
4. d fan switch if equipped If the vehicle does not have a dash mounted fan switch shut off the ignition open the hood and disconnect the fan control solenoid fe 10 11 12 13 14 Choose Cylinder Cutout Test Manual from the Service Routines work window Click the to set the idle speed to 1000 RPM and click Apply Allow engine speed to stabilize Perform Dual Cylinder Cutouts a Click Off for cylinders 1 and 6 and wait 15 seconds b Click Turn All Cylinders On and wait 5 seconds c Click Off for cylinders 2 and 5 and wait 15 seconds d Click Turn All Cylinders On and wait 5 seconds e Click Off for cylinders 3 and 4 and wait 15 seconds f Click Turn All Cylinders On and wait 5 seconds Perform Triple Cylinder Cutouts a Click Off for cylinders 1 2 and 3 and wait 15 seconds b Click Turn All Cylinders On and wait 5 seconds c Click Off for cylinders 4 5 and 6 and wait 15 seconds d Click Turn All Cylinders On Reset engine idle speed back to 600 RPM by clicking Reset Allow engine speed to stabilize Close DDDL connections and turn ignition off Review data Refer to section 3 3 1 Reviewing Data 3 3 1 REVIEWING DATA Review data as follows l 2 Open the log file Go to the Instrumentation work window and select the Chart tab 3 Graph the MCM parameter by typing actual torque in the search field and select the MCM parameter ASLOO2 Actua
5. l Torque All Instruments Chart Cruise Control Ow _ Search Results CPC2 C Torque 145023 Actual Torque _ 4S025 Corrected Actu MCM Percentage 145094 Actual Torque Torque A4SLOO2 Actual Torque lt A Search actual torque 4 Click on View All to contract the time scale so that the complete chart from beginning to end is visible 5 Highlight the Cylinder Cutout Test by clicking on the chart where the first set of companion cylinders are cut and drag the mouse to the end of the test Sera Sere ce GET TAGI GE See j CETHO CETE ks instrumentation a Cie Control ESA DOES F per e uam a o ees eee re 14 ii i eo Time Abah oiite tbi a Torreton 0 deter Baits Lag ame BTA oe 2 OT ee d500001 6 Click on View Selection and only the time you selected will be visible 7 Analyze the companion cylinder cutout graph to determine a low power or over fueling condition 3 3 2 ANALYZING CYLINDER CUTOUT TEST RESULTS A Normal Condition will show all companion cylinder cutouts with equal torque values Both triple cylinder cutouts show equal torque values as well t k EO E libs i if ia __Companion Cylinder Cutout Triple Cylinder Cutout ij fi jii N T araa hi a Tere 7 i e x SS i BEEBE ERB BERBER RRB RBBB RBE RRR RB RR
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