Aftermarket November 2022

NOVEMBER 2022 AFTERMARKET 25 connecter for the control unit. Please refer to Fig.2. Now with the plug disconnected and back probed, a CAN or signal of sorts was present, as the feed and ground were good when load-tested. I only had to concentrate on the Can signal fault with the connector removed to check if this restored the physical layer and signal pattern/communication. It improved marginally. For proof of it trying to work see Fig.3. The inside of the connector aperture was inspected and it looked like some form of mud pit. The connector itself? Well… After a lot of cleaning out of the aperture using contact oil and rubbing the pins up with the electrical tweezers it looked like new. My attention then turned to the plug itself. This I found best to de-pin using the same method. The connector housing was then cleaned and terminals redressed, connector reassembled and plugged back in. To my delight communication was restored, with good signal at both ECM and the control unit. Please refer to Fig.4. Global scan With the system communicating correctly, a global scan of the vehicle was carried out and all the faults cleared. Starting the vehicle up left me with the non-start in so many miles reappearing. As a matter of course the AdBlue level and quality was checked before I carried out a system reset. With the system reinitialized I carried out an extended road test around of 70 miles to confirm that a full passive regeneration took place proving that the system was working correctly. I also data-logged temperatures and DPF feedback pressure, successfully proving the fix before handing the vehicle back to the customer. The last piece of the job was to both show the customer the placement of the sensor and its vulnerability to damage and hopefully alleviate the need for him to have to buy another due to his usage of the vehicle on rough terrain. He was upset at the cost of the part as it was his error that caused the problem. The best part of this job was the outcome; A new customer gained. Since this job was carried out several months ago, we have provided a MOT and a service, proving a that we have a new loyal and satisfied customer. www.aftermarketonline.net Fig 2 Fig 3 Above: Fig 4