What are the reasons why the Mitsubishi Pajero OBD cannot be read?

[StSilas]

Generally, it is caused by a diagnostic tool malfunction or a mismatch between the communication protocol version of the diagnostic tool and the ECU communication protocol version of the vehicle, resulting in the inability to read data from the Mitsubishi Pajero OBD. Diagnostic tool malfunction: The cause of a diagnostic tool malfunction is usually due to internal wiring breakage or aging, leading to poor contact and affecting the normal operation of the diagnostic tool. If the diagnostic tool malfunction causes the vehicle OBD to fail to read data, it is necessary to check whether the internal wiring of the diagnostic tool is the issue. Wiring problems can be repaired based on the actual situation; if the internal components of the diagnostic tool are severely damaged, a new diagnostic tool needs to be replaced. ECU communication protocol mismatch: ECU communication protocol mismatch is generally due to the diagnostic tool's communication protocol version being outdated and not upgraded, preventing the diagnostic tool and the vehicle from establishing an effective connection when their ECU protocol versions do not match, thus making it impossible to read data smoothly from the Mitsubishi Pajero OBD. In this case, a professional technician is needed to perform a software upgrade on the ECU with the lower version and attempt to re-establish an effective connection. Once the connection is successfully established, data can be read normally.

[VonSavannah]

My Mitsubishi Pajero also had an issue with the OBD not reading data recently, which was quite frustrating. There could be many possible reasons, such as a loose OBD port or dust accumulation leading to unstable connections. At that time, I first checked if the connector was corroded, but cleaning it didn’t help, so I thought the fuse might have blown. The Pajero’s fuse box is located under the dashboard, and upon opening it, I found a blown fuse. Going deeper, issues like wiring aging or short circuits are also common, especially in older Pajero models where cracked wire insulation can easily cause shorts. Another possibility is ECU module communication failure—my friend’s car had to repair the ECU wiring for this reason. If the scanner won’t connect, try switching to another device, as it might be a compatibility issue. In short, don’t delay fixing this problem, as it can affect reading fault codes and maintenance. Regularly cleaning the port area can help prevent it.

[LaPaislee]

Having worked on many Pajeros, it's quite common to encounter OBD reading failures. First, check if the fuses are intact, and don't overlook the fuse box under the dashboard. Poor contact at the interface is the main cause—cleaning oxidation or looseness with a cotton swab usually solves it. Wiring issues shouldn't be ignored either; damaged wires or short circuits can interrupt data transmission, so use a multimeter to test resistance. Due to the Pajero's design, the interface is positioned relatively low, making it prone to sand and dirt ingress—pay attention to sealing during maintenance. If the diagnostic tool isn't responding, it might be a compatibility issue; try switching to another device first. ECU faults are more complex; if communication fails, it's safer to inspect the entire CAN bus system. Don’t underestimate this issue—OBD failure could hide engine risks. It's advisable not to delve too deep into DIY fixes; instead, visit a professional shop to use diagnostic tools for checking wiring connection points.

[Joyce]

Mitsubishi Pajero OBD cannot be read, often due to simple issues. Dirt at the interface or loosening from being pressed can cause connection failure. Blown fuses are also common; just open the fuse box and replace them. If the wiring harness is short-circuited or aged, signals cannot be transmitted. Diagnostic tools sometimes mismatch and cause errors, so ensure the correct equipment is used. ECU communication faults should also be considered, but Pajero-specific issues are rare. DIY solutions: clean the port, check the fuses, try another diagnostic tool. If that doesn't work, visit a repair shop—fixing it won't affect daily driving. Remember to regularly check the interface cleanliness.