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connection-diagnostics [2016/03/24 17:09]
twdorris
connection-diagnostics [2016/03/24 17:12] (current)
twdorris
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   - Have you ever been able to connect to this ECU in this car using this cable and this laptop before? - possible cable issue if nothing else has changed; particularly if this problem just started after having been able to connect and log fine recently.   - Have you ever been able to connect to this ECU in this car using this cable and this laptop before? - possible cable issue if nothing else has changed; particularly if this problem just started after having been able to connect and log fine recently.
-  - If you've never been able to connect, make sure the device drivers are installed. ​ [[:​ecmlink101install|Check this]]. ​ Don't just assume. ​ Pull up device manager and confirm that you get a new COM port when the cable is plugged into the laptop. +  ​- Is the package new from us or old/bought from a third party? 
-  - Is the ECU even running? ​ If the engine starts, the ECU is running. ​ If you haven'​t (or can't) start the engine, observe the check engine light when you first turn on ignition. It should come on for five seconds and then go back out. If it stays on constantly, then suspect something related to the ECU and/or wiring leading up to it. In addition to the check engine light test, check to see that the in-dash stock boost gauge needle moves up to about the half-way mark and stays there when you turn the ignition key on.+      - If new from us, then it's very unlikely that the cable is bad and you should suspect other issues first. 
 +      - If it's used, do you know if it's been able to connect recently? ​ If not, then it could be an issue with the cable. 
 +  ​- If you've never been able to connect, make sure the device drivers are installed. [[:​ecmlink101install|Check this]]. Don't just assume. Pull up device manager and confirm that you get a new COM port when the cable is plugged into the laptop. 
 +  - Is the ECU even running? If the engine starts, the ECU is running. If you haven'​t (or can't) start the engine, observe the check engine light when you first turn on ignition. It should come on for five seconds and then go back out. If it stays on constantly, then suspect something related to the ECU and/or wiring leading up to it. In addition to the check engine light test, check to see that the in-dash stock boost gauge needle moves up to about the half-way mark and stays there when you turn the ignition key on
 +  - By FAR, the best way to check your diagnostic cable is to try it in a known working car using a known working laptop. ​ If the other person can connect to his ECU fine using his cable and then can't connect to his ECU using your cable, then it's a bad cable. ​ If he can connect fine to his ECU using your cable, then you've got other issues in your car/​laptop/​wiring/​ECU/​whatever.
  
connection-diagnostics.txt · Last modified: 2016/03/24 17:12 by twdorris