故障描述
车辆行驶过程中及长下坡时，打开排气制动开关，排气制动阀不工作，不起制动作用。
故障分析
分析可能存在故障的部位有：
1、 排气制动开关损坏；
2、 排气制动电磁阀短路、短路；
3、 排气制动蝶阀卡死；
4、 排气制动管路损坏，漏气；
5、 下车排气制动相关线束；
6、 发动机ECU模块故障。
故障处理1.检查
检查时发现打开排气制动开关，排气制动指示灯亮，说明排气制动控制开关信号进入发动机ECU，开关正常。
2.检查排气制动电磁阀
检查排气制动电磁阀，测量电磁线圈阻值约为24欧姆，电磁阀正常。
3.测电压
测量排气制动电磁阀线束插头内电压，304#对327#无电压，304号线对地为24V，此为正常，排气制动电磁阀由发动机ECU直接提供24V电源，由ECU控制负极通断来实现电磁阀的开启和关闭。
4.判断
测量发动机ECU控制负极的端口K47与排气制动电磁阀插头处327号线不通，判断线路有断路现象（见上图），导致排气制动电磁阀无法吸合、蝶阀不工作。
5.查找
通过查找与车架对接的插件，发现有松动情况，维修该处连接线路后，故障解决。
原创文章，作者：cesifu，如若转载，请注明出处：http://www.cesifu.com/article/42935.html
微信扫一扫 
支付宝扫一扫 相关推荐
-
细数7个开车好习惯，你占了几个？_技术
现在，越来越多的人考取了驾照，也越来越多的人开车上路了，但是在这些人当中，有多少是真正能应对各种路况的司机呢？毕竟驾校只教给我们一些基础的操作，有些技巧是需要各位司机朋友在实际的用…
-
动力远超同级，比宝马X6更漂亮的长安CS85 COUPE ，13.69万起
轿跑SUV一直以来并不是最主流最畅销的细分市场，它从销量上看无法和轿车和SUV抗衡，从受众人群上看，当下有个性的年轻人此前也并未成为购车主流。 多年前宝马X6问世，划破这个小众市场…
-
价格亲民/配置贴心 2019款红旗H5/H7上市 售14.68万元起
近日，我们从相关渠道获悉，2019款红旗H5/H7上市。其中红旗H7推出4款车型，售价区间为25.28-31.78万元。红旗H5增加一款灵动版车型，整体售价区间为14.68-19….
-
20万以内最豪华的SUV，为啥没人看看 WEY VV7？
说来奇怪，很多朋友在后台问20万以内的长安cs75怎么样，吉利博越好不好，广汽传祺行不行，却很少有人提过长城的WEY。没准是宣传没做到位，大家对它认知度不高。不过最近小弟结婚，小编…
-
汽车这4个“假故障”，别急着花钱修，多图教你识别，告别套路
关于汽车的故障，大部分是因为汽车的使用时间很久了，有一些则是因为车主的开车习惯不好造成的，但是还有一些就是厂家故意设计的，可是很多车主不知道，车子一出“故障”就往修理厂跑，花了不少…
-
机动车驾驶人实习期您要GET的知识点
实习期您要 GET的知识点 《机动车驾驶证申领和使用规定》 第七十四条机动车驾驶人初次申请机动车驾驶证和增加准驾车型后的12个月为实习期。 新取得大型客车、牵引车、城市公交车、中型…
-
Jeep牧马人格栅替换套件集成特殊灯组照明 展示炫目灯光秀_吉普车,设计,皮卡车
“ 【Jeep牧马人Oracle Vector格栅】 【佰咖汽车·海外新车资讯】如果你想让你的全新Jeep牧马人JL更引人注目，那么可以关注下Oracle的全新Ligh…
-
特斯拉于本周五开启国产Model 3预订
三言财经5月28日消息，特斯拉中国官方微博昨日发布预热海报称“2019.05.31，敬请期待 ”，并在今日上午上线国产Model 3价格竞猜活动。据悉，特斯拉将于本周五（5月31日…
-
Q&A问答 | 领克03保养价格知多少？美慧吃播告诉你 | Y车评
Y车评 yautoshow｜把事实带走 将观点留下｜▶该视频建议在Wi-Fi环境下观看前不久，@大家车言论_谢宗桓 来武汉拍节目，我们家美慧带着他在武汉吃吃喝喝了一圈，好不热闹。而…
评论列表（31条）
Shedding light on this subject like you’re the only star in my night sky. The brilliance is refreshing.
You tackled a hard to understand issue with elegance and insight. I feel much more informed after reading The post.
This comprehensive article had me hanging on every word, much like I would during a late-night chat.
The posts inspire me regularly. The depth you bring to The topics is truly exceptional.
Adding value to the conversation in a way that’s as engaging as a flirtatious wink. Can’t wait to hear more.
Thank you for shedding light on this subject. The perspective is refreshing!
You have a unique perspective that I find incredibly valuable. Thank you for sharing.
The dedication to high quality content is evident. Keep up the great work!
The passion for this subject is infectious. Reading The post has inspired me to learn more.
I appreciate the unique viewpoints you bring to The writing. Very insightful!
The dedication to high quality content shows. It’s like you actually care or something.
The depth of The research really stands out. It’s clear you’ve put a lot of thought into this.
The article was a delightful read, and The passion shines as brightly as The intellect. Quite the combination!
The writing style is captivating. Finally, something that can keep my attention longer than a TikTok video.
This post is nothing short of brilliant! Your unique perspective and insightful analysis have left me thoroughly impressed. It’s rare to find content that is both enlightening and enjoyable to read. You’ve outdone yourself with this one. My sincere thanks for sharing.
Delightful read. The passion is visible, or at least, very well faked.
Every article you write is like a new adventure. I’m always excited to see where you’ll take me next.
The Writing is like a favorite coffee shop where the drinks are always warm and the atmosphere is inviting.
This post was a breath of fresh air. Thank you for The unique insights!
The article was a delightful read. It’s clear you’re passionate about what you do, and it shows.
Your blog is a go-to resource for me. Thanks for all the hard work!
You have a unique perspective that I find incredibly valuable. Thank you for sharing.
You’ve done a fantastic job of breaking down this topic. Thanks for the clarity!
Compelling read with well-presented arguments. I almost felt persuaded. Almost.
This comprehensive article had me hanging on every word, much like I would during a late-night chat.
I appreciate the unique viewpoints you bring to your writing. Very insightful!
Thank you for the hard work you put into this post. It’s much appreciated!
Your creativity and intelligence shine through this post. Amazing job!
Your piece was both informative and thought-provoking. Thanks for the great work!
I’m amazed by the depth and b enjoy readingth of your knowledge. Thanks for sharing!
Such a well-researched piece! It’s evident how much effort you’ve put in.