SP18-35F
Service Bulletin Details
Public Details for: SP18-35F
P20EE (diagnostic troubleshooting code) solution - nox conversion efficiency rev e: expiration date removed
- 2021 - 2020 - 2019 - 2018 - 2017 -
Models from 2021
2021 PREVOST H3-41 |
2021 PREVOST H3-45 |
2021 PREVOST H3-45 VIP |
2021 PREVOST X3-45 |
2021 PREVOST X3-45 COMMUTER |
2021 PREVOST X3-45 VIP |
Models from 2020
2020 PREVOST H3 |
2020 PREVOST H3-45 |
2020 PREVOST H3-45 VIP |
2020 PREVOST X3 |
2020 PREVOST X3-45 |
2020 PREVOST X3-45 VIP |
Models from 2019
Models from 2018
Models from 2017
2017 PREVOST H3-41 |
2017 PREVOST H3-45 |
2017 PREVOST H3-45 VIP |
2017 PREVOST H3-VIP |
2017 PREVOST X3 |
2017 PREVOST X3-45 |
2017 PREVOST X3-45 VIP |
2017 PREVOST X3-45 VIP ENTERTAINER |
2017 PREVOST X3VIP |
SP18-35F Special Bulletin Date Expiration 11.2018 Revision: F Addition to Warranty section Release Page 5 1(15) 09/03/2021 P20EE (diagnostic troubleshooting code) SOLUTION - NOX CONVERSION EFFICIENCY Prevost vehicles B13R (9700 us/can) DESCRIPTION For the vehicles on which a notification for SP18-35 exists, perform the following checklist and operations. It has been determined that these vehicles had the code (DTC) P20EE activated. DO NOT perform this special bulletin on a specific vehicle unless a notification exists, otherwise, no reimbursement will be awarded. MODEL YEAR(S) AND VEHICLES INVOLVED NOTICE TO SERVICE CENTERS Verify vehicle eligibility by checking warranty bulletin status with SAP or via ONLINE WARRANTY SYSTEM available on Service / Warranty tab of Prevost website. H3-41, H3-45 coaches Model Year: 2017 - 2019 GHG17 or OBD18 compliant vehicles H3-45 VIP motorhomes From 2PCH33494HC713735 up to 2PCH33492KC710467 (not incl.) Model Year: 2017 - 2019 X3-45 coaches GHG17 or OBD18 compliant vehicles Model Year: 2017 - 2019 From 4RKG33491H9737417 up to 4RKG33490K9737576 (not incl.) X3-45 coaches Model Year: 2017 - 2019 X3-45 VIP commercial use GHG17 or OBD18 compliant vehicles Model Year: 2017 - 2019 From 2PCCS3495HC736180 up to 2PCCS3498KC736407 (not incl.) X3-45 VIP motorhomes Model Year: 2017 - 2019 VOLVO 9700 Model Year: 2017 - 2019 Writer: EL GHG17 or OBD18 compliant vehicles From 3CET2V927H5184392 up to 3CET2V926K5194709 incl.SP18-35F Special Bulletin Date Expiration 11.2018 MATERIAL Release Page 5 2(15) Part required Part No. Description Qty 22677399 GASKET, DEF INJECTION NOZZLE 1 21376801 SEALING PLATE 1 22677399 21376801 NOTE Material can be obtained through regular channels. Other parts that may be required. Note that these parts are not covered by this bulletin. Part No. Description Qty 22303390 NOx SENSOR, PRE 1 22303391 NOx SENSOR, POST 1 Writer: EL SP18-35F Special Bulletin Date 11.2018 Expiration Release Page 5 3(15) DANGER Park vehicle safely, apply parking brake, stop the engine. Prior to working on the vehicle, set the ignition switch to the OFF position and trip the main circuit breakers equipped with a trip button. On Commuter type vehicles, set the battery master switch (master cut-out) to the OFF position. IMPORTANT NOTES DO NOT perform WB18-04 or WB18-84 EMS & ACM SOFTWARE UPDATE before the following checklist, otherwise useful diagnostic codes and monitor data could be erased. Wb18-04 for Prevost coaches, Wb18-84 for Volvo 9700 Any troubleshooting labor of active DTCs (Diagnostic Troubleshooting Codes) other than P20EE is considered as a separate operation of the RO (repair order) and cannot be charged to this special bulletin. Writer: EL SP18-35F Special Bulletin Date Expiration 11.2018 Release Page 5 4(15) PART 1 Vehicle identification H3 X3 9700 V.I.N (short) : __ ̶ __ __ __ __ OPERATIONS TO BE PERFORMED IN ADVANCE BY THE SERVICE ADVISOR Ask the customer whether he/she noticed an abnormal consumption of oil or coolant. Search all relevant information concerning the aftertreatment system or severe turbo failure in the history of repairs of the vehicle and record. Attach to the repair order. Also check if SP18-35 has already been performed on that particular coach. If this is the case, do not perform SP18-35 once again, contact the Technical Publications for instructions. You can send a message to the Technical Publications functional mailbox: [email protected] NOTE/RESULTS: Writer: EL SP18-35F Special Bulletin Date Expiration 11.2018 Release Page 5 5(15) # checklist 1 Connect PTT and check the diagnostic codes related to EMS and ACM. Take a screen capture of the DTCs and attach to the repair order. INITIALS & DATE Confirm that code P20EE is present (whether active or inactive). If P20EE is not present, do not continue with this checklist. Is the code P20EE present? YES NO COMMENTS/RESULTS: 2 Take a screen capture of the five most recent SCR efficiency evaluations (Test screen 2589‐08‐ 03‐05), attach to the repair order. Example of SCR efficiency evaluations Are the five most recent SCR efficiency evaluations hovering around or lower than 80%? YES NO COMMENTS/RESULTS: 3 Check if there are leaks at the Charge Air Cooler (soapy water test). Check if there are leaks of EGR, exhaust gas (between turbo and SCR converter). Note any presence of soot. Any repair is considered as a separate operation of the RO (repair order) and cannot be charged to this special bulletin. Note: Try to clear exhaust clamps while keeping in mind the state of the insulating blankets to avoid damages because the heat can make them fragile over time. Leaks were found? YES NO COMMENTS/RESULTS: Writer: EL SP18-35F Special Bulletin Date Expiration Release Page 5 6(15) 11.2018 4 Remove DEF doser and perform all dosing amount tests (Test screen 2589-08-03-05) and record the results below. Expected values: small dosing = 49 - 60 ml large dosing = 196 - 240 ml Dosing amount: small________ ml large _________ ml Are the results from the DEF dosing amount tests normal? YES NO COMMENTS/RESULTS: 5 Test the concentration of DEF and record the result below. Tool: refractometer # 88890105. Is the DEF of proper concentration? YES NO COMMENTS/RESULTS: 6 Check inside the pipe downstream of the DEF injector for any accumulation of solid (crystallized) DEF, attach pictures of crystal accumulations if applicable. Solid DEF will be removed during PART 2 with Sulfur Regen if applicable. Reinstall the DEF injector with two new seals. NOTE: A small amount of crystal accumulation is normal. Is there significant/excessive DEF crystal buildup? YES NO COMMENTS/RESULTS: Writer: EL SP18-35F Special Bulletin Date Expiration 11.2018 7 Release Page 5 7(15) Check and record the engine ECU (a.k.a. Engine Control Module ECM) software number. To do so, check in the dashboard DID. Select DIAGNOSTICS > PART NUMBER > ENGINE ECU Engine ECU software number: ___________________________ COMMENTS/RESULTS: Writer: EL SP18-35F Special Bulletin Date Expiration Release Page 5 8(15) 11.2018 8 Perform a NOx Conversion Test and take screen captures. INSTRUCTIONS Read all the parts of step 8 to clearly understand the purpose of the test, know which part of the graph curves you should monitor and be aware of the possible behaviors of the conversion test. Note: It will be necessary to start the engine from the rear of the vehicle. -----------------------------------------------Use this test to compare the inlet and outlet NOx sensor ppm levels. Usually we monitor the last part of the test, just before shutdown, when the engine runs at high rpm (1800 rpm). Both levels should be close to each other at that point. See the example below (image). IMPORTANT NOTE: If the vehicle has the engine ECU software number 23470183 (see step 7), the test will behave differently than what is shown in the example below. In this case, refer to NOx Conversion Test With ECU software number 23470183. USUAL BEHAVIOR If both NOx sensor ppm levels are close to each other during the last part, as shown in the example above (image), then both NOx sensors are good. If ppm levels difference exceeds 10%, then the sensor reading higher should be considered as defective. Writer: EL SP18-35F Special Bulletin Date Expiration Release Page 5 9(15) 11.2018 𝑝𝑝𝑝𝑝𝑝𝑝 𝑙𝑙𝑙𝑙𝑙𝑙𝑙𝑙𝑙𝑙𝑙𝑙 𝑑𝑑𝑑𝑑𝑑𝑑𝑑𝑑𝑑𝑑𝑑𝑑𝑑𝑑𝑑𝑑𝑑𝑑𝑑𝑑 (%) = ℎ𝑖𝑖𝑖𝑖ℎ𝑒𝑒𝑒𝑒𝑒𝑒 𝑣𝑣𝑣𝑣𝑣𝑣𝑣𝑣𝑣𝑣 − 𝑙𝑙𝑙𝑙𝑙𝑙𝑙𝑙𝑙𝑙𝑙𝑙 𝑣𝑣𝑣𝑣𝑣𝑣𝑣𝑣𝑣𝑣 × 100 𝑙𝑙𝑙𝑙𝑙𝑙𝑙𝑙𝑙𝑙𝑙𝑙 𝑣𝑣𝑣𝑣𝑣𝑣𝑣𝑣𝑣𝑣 Ex.: 𝑝𝑝𝑝𝑝𝑝𝑝 𝑙𝑙𝑙𝑙𝑙𝑙𝑙𝑙𝑙𝑙𝑙𝑙 𝑑𝑑𝑑𝑑𝑑𝑑𝑑𝑑𝑑𝑑𝑑𝑑𝑑𝑑𝑑𝑑𝑑𝑑𝑑𝑑 (%) = (288−279) 279 × 100 = 3.2 (%) Are both original NOx sensors good (ppm difference ≤10%)? YES NO ppm levels difference = ___________% Replace the defective sensor 1 if applicable and then perform a new NOx sensor test once again to make sure that the replacement sensor is good. ----------------------------------------- NOx Conversion Test With engine ECU software number 23470183 Engine ECU software number 23470183 allows DEF dosing to continue during the last part of the NOx conversion test (just before shutdown). This causes continued low outlet NOx sensor ppm levels, as seen in the example below. Take screen captures. DIFFERENT BEHAVIOR. In this example, the NOx sensors ppm levels are not close to each other because DEF is still injected during the last part of the test. In this instance, review earlier sections of the test to ensure that both sensors are responding to changes in the same manner. Examples of different stages to review are shown below. 1 Change only one sensor, since both will eventually be replaced with the new SCR converter Writer: EL SP18-35F Special Bulletin Date 11.2018 Expiration Release Page 5 10(15) COMPARISON SHOULD BE DONE WHEN BOTH NOX SENSORS ARE READING BELOW 600 ppm The NOX sensors levels are close to each but earlier during the test (images above & below). If both NOx sensor ppm levels are close to each other at a point during the test as shown in the examples (image) above, then both NOx sensors are good. If ppm levels difference is greater than 10%, then the sensor reading higher should be considered as defective. COMMENTS/RESULTS: Writer: EL SP18-35F Special Bulletin Date Expiration Release Page 5 11(15) 11.2018 9 If all of the five following conditions are satisfied, do not perform PART 2 of this bulletin. Send this checklist along with screen captures to the Technical Publications to request approval for the SCR converter replacement. Conditions 1) 2) 3) 4) 5) Engine is free from major component failure/performance issues Five most recent SCR efficiency values hovering around or below 80% (step 2) DEF dosing amount tests showed normal values (step 4) DEF concentration within GOOD range (step 5) Both original NOx sensors are good (step 8) All five conditions satisfied, bulletin ended at step 9 (no need to perform sulfur regeneration nor a road test): Authorization for the replacement of the SCR converter. An analysis of this checklist with the comments/results must be done in order to allow the replacement of the SCR converter. Scan and send this checklist and all the relevant documents, photos, etc. to the Technical Publications functional mailbox: [email protected] Please indicate in the “subject line”: SP18-35 and the short V.I.N. below… as in the example COMMENTS/RESULTS: Writer: EL SP18-35F Special Bulletin Date Expiration Release Page 5 12(15) 11.2018 PART 2 # 1 checklist INITIALS AND DATE Perform one Sulfur Regeneration (Test screen 2589-08-03-02). COMMENTS/RESULTS: 2 Do a test drive of at least 1 hour to 1 ½ hour at highway speed (45 minutes in each direction). COMMENTS/RESULTS: 3 Connect PTT and take a screen shot of the last five (5) SCR efficiency evaluations (Test screen 2589‐08‐03‐05). a) Make sure that the EMS has been able to carry out a new evaluation (see example below showing the latest evaluation on top of the previous evaluations). Note: It is very likely that a new evaluation cannot be carried out if the outside temperature is rather cold during the road test. If this is the case, return the vehicle into service. Please check the box below and indicate the outside temperature. EMS could not carry out a new evaluation Outside temp: _____ ° b) If SCR efficiency value on the most recent evaluation is >85% vehicle may be released (Typical new SCR is expected to get >90% SCR efficiency). This special bulletin can then be closed. Please, Scan and send this checklist and all the relevant documents, photos, etc.to the Technical Publications functional mailbox: [email protected]. c) Authorization for the replacement of the SCR converter. If post-road test SCR efficiency value is less than 85%, an analysis of this checklist with the notes/results must be done in order to allow the replacement of the SCR converter. Scan and send this checklist and all the relevant documents, photos, etc. to the Technical Publications functional mailbox: [email protected] Please indicate in the “subject line”: SP18-35 and the short V.I.N. as in the example below… Writer: EL SP18-35F Special Bulletin Date Expiration Release Page 5 13(15) 11.2018 COMMENTS/RESULTS: Example of SCR performance test Before the road test After the road test (most recent evaluation=105%) ADDITIONAL COMMENTSS/RESULTS: Writer: EL SP18-35F Special Bulletin Date Expiration 11.2018 Release Page 5 14(15) PARTS / WASTE DISPOSAL Discard waste according to applicable environmental regulations (Municipal/State[Prov.]/ Federal) WARRANTY This diagnostic is covered by Prevost’s normal warranty. We will reimburse you the parts and labor upon receipt of a warranty claim according to the following: PARTS COVERED BY THIS BULLETIN 22677399 DEF injection nozzle gasket Qty: 1 21376801 sealing plate Qty: 1 Any other parts such as parts installed to correct exhaust leaks or for the replacement of sensors cannot be charged to this bulletin. These are covered by the normal warranty when applicable and must be charged on a different operation. LABOR COVERED BY THIS BULLETIN The time allowed to complete PART 1 of this bulletin is 2 hours The time allowed to complete PART 1 & PART 2 of this bulletin is 4 ¼ hours This allowed time covers the execution of the procedure described in this document only. Any corrective work such as replacing the DEF injector, correcting exhaust leaks or any diagnostic work of active DTCs codes other than P20EE is considered a separate operation on the repair order and cannot be charged to this special bulletin. Please submit claim via our Online Warranty System, available at www.prevostcar.com (under Service \ Warranty section). Use Claim Type: “Bulletin/Recall” and select ‘’Warranty Bulletin SP18-35 ". Writer: EL SP18-35F Special Bulletin Date 11.2018 OTHER VBC Bulletin N/A Fail Code 04.04-1 Defect Code 9 Syst. Cond B Causal Part 21970125 Expiration Release Page 5 15(15) Access all our Service Bulletins on http://techpub.prevostcar.com/en/ or scan the QR-Code with your smart phone. Prevost engages in a continuous program of testing and evaluating to provide the best possible product. Prevost, however, is not committed to, or liable for updating existing products. Writer: EL