SP18-35B_English
Service Bulletin Details
Public Details for: SP18-35B_English
On vehicles with active code P20EE, perform the following checklist and operations.
Models from 2019
2019 PREVOST H3-41 |
2019 PREVOST H3-45 |
2019 PREVOST H3-45 VIP |
2019 PREVOST X3 |
2019 PREVOST X3VIP |
Models from 2018
2018 PREVOST H3-41 |
2018 PREVOST H3-45 |
2018 PREVOST H3-45 VIP |
2018 PREVOST X3 |
2018 PREVOST X3VIP |
Models from 2017
2017 PREVOST H3-41 |
2017 PREVOST H3-45 |
2017 PREVOST H3-45 VIP |
2017 PREVOST X3 |
2017 PREVOST X3VIP |
SP18-35B Special Bulletin Revision: B Date Expiration Release Page 11.2018 11.2020 3 1(11) Recasting of procedure 03/22/2019 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.SP18-35B Special Bulletin MATERIAL Date Expiration Release Page 11.2018 11.2020 3 2(11) 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 Part No. Description Qty 22303390 NOx SENSOR, PRE 1 22303391 NOx SENSOR, POST 1 Writer: EL SP18-35B Special Bulletin Date Expiration Release Page 11.2018 11.2020 3 3(11) 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 SP18-35B Special Bulletin Date Expiration Release Page 11.2018 11.2020 3 4(11) 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 SP18-35B Special Bulletin Date Expiration Release Page 11.2018 11.2020 3 5(11) # 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 NOTE/RESULTS: 2 Take a screen capture of the last five SCR efficiency evaluations (Test screen 2589‐08‐03‐05), attach to the repair order. Are the last five SCR efficiency values below 80%? YES NO NOTE/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 NOTE/RESULTS: 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 NOTE/RESULTS: Writer: EL SP18-35B Special Bulletin 5 Date Expiration Release Page 11.2018 11.2020 3 6(11) Test the concentration of DEF and record the result below. Tool: refractometer # 88890105. Is the DEF of proper concentration? YES NO NOTE/RESULTS: 6 Check inside the flex 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. Is there solid (crystallized) DEF in the flex pipe? YES NO NOTE/RESULTS: Writer: EL SP18-35B Special Bulletin 7 Date Expiration Release Page 11.2018 11.2020 3 7(11) Perform a NOx Conversion Test. Read the following instructions. Instructions Note: it will be necessary to start the engine from the rear of the vehicle. Most important part of this test is to check and compare the inlet and outlet NOx sensor ppm levels at high speed (just before shutdown). Take a screen capture. If both NOx sensor ppm levels are close to each other at that point as shown on the image below, then both NOx sensors are good. If ppm levels difference is greater than 10%, then the sensor reading higher should be considered as defective. Are both original NOx sensors good (ppm difference ≤10%)? YES NO 1 Replace the defective sensor if and then perform a new NOx sensor test once again to make sure that the replacement sensor is good. 𝑝𝑝𝑝𝑝𝑝𝑝 𝑙𝑙𝑙𝑙𝑙𝑙𝑙𝑙𝑙𝑙𝑙𝑙 𝑑𝑑𝑑𝑑𝑑𝑑𝑑𝑑𝑑𝑑𝑑𝑑𝑑𝑑𝑑𝑑𝑑𝑑𝑑𝑑 (%) = 1 ℎ𝑖𝑖𝑖𝑖ℎ𝑒𝑒𝑒𝑒𝑒𝑒 𝑣𝑣𝑣𝑣𝑣𝑣𝑣𝑣𝑣𝑣 − 𝑙𝑙𝑙𝑙𝑙𝑙𝑙𝑙𝑙𝑙𝑙𝑙 𝑣𝑣𝑣𝑣𝑣𝑣𝑣𝑣𝑣𝑣 × 100 𝑙𝑙𝑙𝑙𝑙𝑙𝑙𝑙𝑙𝑙𝑙𝑙 𝑣𝑣𝑣𝑣𝑣𝑣𝑣𝑣𝑣𝑣 Ex.: 𝑝𝑝𝑝𝑝𝑝𝑝 𝑙𝑙𝑙𝑙𝑙𝑙𝑙𝑙𝑙𝑙𝑙𝑙 𝑑𝑑𝑑𝑑𝑑𝑑𝑑𝑑𝑑𝑑𝑑𝑑𝑑𝑑𝑑𝑑𝑑𝑑𝑑𝑑 (%) = (288−279) 279 × 100 = 3.2 (%) Change only one sensor, since both will eventually be replaced with the new SCR converter Writer: EL SP18-35B Special Bulletin Date Expiration Release Page 11.2018 11.2020 3 8(11) NOTE/RESULTS: 8 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) Engine is free from major component failure/performance issues 2) Both original NOx sensors are good 3) DEF dosing amount tests showed normal values 4) DEF concentration within GOOD range 5) Last five SCR efficiency values were all below 80% (results from step 2) All five conditions satisfied, bulletin ended at step 8 (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 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. below… as in the example NOTE/RESULTS: Writer: EL SP18-35B Special Bulletin Date Expiration Release Page 11.2018 11.2020 3 9(11) PART 2 # 1 checklist INITIALS AND DATE Perform one Sulfur Regeneration (Test screen 2589-08-03-02). NOTE/RESULTS: 2 Do a test drive of at least 1 hour to 1 ½ hour at highway speed (45 minutes in each direction). NOTE/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, attach this filled checklist to the repair order in SAP. 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 SP18-35B Special Bulletin Date Expiration Release Page 11.2018 11.2020 3 10(11) NOTE/RESULTS: Example of SCR performance test Before the road test After the road test (most recent evaluation=105%) ADDITIONAL NOTES/RESULTS: Writer: EL SP18-35B Special Bulletin Date Expiration Release Page 11.2018 11.2020 3 11(11) PARTS / WASTE DISPOSAL Discard waste according to applicable environmental regulations (Municipal/State[Prov.]/ Federal) ESTIMATED TIME PART 1 only The time required to perform PART 1 of this special bulletin is 2 hours PART 1 & PART 2 completed The time required to perform PART 1 & PART 2 is approximately 4 ¼ hours OTHER VBC Bulletin N/A Fail Code 04.04-1 Defect Code 9 Syst. Cond B Causal Part 21970125 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