FREIGHTLINER, MERCEDES-BENZ

LI49.20-N-076565

2024-09-25 · NHTSA 11008717

车型关联可作为查阅线索；具体发动机、生产范围和软件条件请核对厂商资料。

厂商摘要

以下为英文原文

Complaint Check engine light with fault code: P300E3B the efficiency of component 'SCR catalytic converter' is not sufficient, is present in the CDI control unit CDI (N3/28). Cause This subject is currently being analyzed for all 907s equipped with the OM642 engine. Follow the instructions related to this subject to collect information about your vehicle. After completing the checks, please open a TIPS case and attach the collected information. Remedy Please complete the following inspections and tests: 1. Perform a tailpipe wipe test and document the results along with photographs. 2. Inspect the NOx connectors, pins, crimps, and harnesses between N37/7 and N37/8 to F152f59, Z7108, W105/3, and X30/81. 3. Provide actual values/sensor plausibility test results for all pressure and temperature sensors with the engine com- pletely cooled off for at least eight hours, the key on, and the engine off. Repeat the test with the engine/exhaust at operating temperature and the engine idling. 4. Perform a pressurized smoke test of the intake, charge air system, and exhaust to verify that there are no leaks. Apply overpressure (not exceeding 26 psi) from the exhaust pipe end and seal the system at the clean airline toward the air filter housing. Manipulate all components during the smoke test. 5. Provide diesel particulate filter actual values and regeneration history. 6. Inspect the SCR temperature sensor wirings and pins for electrical and physical correctness. Determine whether this sensor reaches operating temperature while driving and document the time it takes to reach operating temperatu- re. 7. Inspect the Adblue injector nozzle/s for clogging or leaking, and provide photographs. 8. With the Adblue injector/s removed from the exhaust system, perform two to three Adblue pressure tests and check for leaks. If leaks are detected, provide photographs. 9. Collect an Adblue sample, test fluid quality, and provide notes on its condition and quantity (color, clarity, separati- on, odor, etc.), along with a photograph for review. Also, provide a photograph of the spray pattern. 10. Separate the exhaust pipe downstream of the diesel particulate filter, inspect the diesel particulate filter and SCR, and note any soot, blockage, or damage. Provide photographs. 11. Inspect the SCR catalyst interior for dried Adblue residue, and provide photographs. 12. Perform several test drives at varying speeds to gather graphical illustrations (screenshots of the completed graphs in PDF format) of signals from NOx sensors. Provide three to four graphs or actual values of operational NOx sensors with XENTRY; see attachments for examples. Additionally, provide one graph/screenshot of the vehicle idling at operating temperature. Disconnect the Adblue injection valve, drive for approximately 30 minutes to exhaust all Ad- blue within the SCR catalytic converter, and provide two to three additional NOx graphs/screenshots with the sensor disconnected. (see attachments for needed graphs)

仅当厂商、通报编号、发布日期和完整摘要一致时，重复登记才会合并展示，原始编号仍予保留。旧资料继续供查阅；确认明确替代关系后才标示后续版本。1994 年以前的车辆关联与默认结果分开显示；未注明年款不等于适用于所有年款。