Kawasaki Z125 Forum banner
1 - 14 of 14 Posts

·
Registered
Joined
·
6 Posts
Discussion Starter · #1 ·
Bought my Z125 Pro off the lot 2 weeks ago. Since purchasing I have completed a fender eliminator and installed a tail light both from motodynamic. Today I rode the bike for the first time at the basic rider course. Near the end of the day I had close to 15 miles on the odometer but, suddenly the check engine light illuminated. No unusual signs from the bike, still rode it for the last 2 evolutions just kinda confused on what I could’ve done? Any insight is appreciated as this is my first bike.
 

·
Registered
Joined
·
585 Posts
First, don't worry about it. Surely not a big deal.

Pull the diagnostic code. Under the seat there's a single plug that's not plugged into anything with a rubber shroud around it. Short that out to ground with a clip or something to get the codes. Find a walkthrough on youtube. You get a number a long flashes and a number of short flashes to signify the service code. From there you know where to look. It's usually something simple.



Half of these don't apply to your bike but the numbers are standardized across Kawi lines.

Of course you could just take it in under warranty. But there's a chance they will blame it on something you did then charge you for their time. So I'd give it a shot yourself first.
 

·
Registered
Joined
·
6 Posts
Discussion Starter · #3 ·
Awesome thanks for the detailed advice. I’ll give that a try and go from there. Again I greatly appreciate it!
 

·
Registered
Joined
·
177 Posts
Try checking the connector first. It might not be fully seated(clicked in place) and after a few miles it's backed off enough to break the circuit and turn on a light. It's located behind the front sprocket and I think it's a blue plastic connector. Gently push it or wiggle it to see if it moves or separates. If it feels snug, then follow the advice above and have the dealer look at it.
 

·
Registered
Joined
·
6 Posts
Discussion Starter · #7 ·
Thanks guys. I played with the connector even disconnected and re-connected. No joy, speed seems to register on the speedometer as it should. Going to the dealership is about an hours drive. I’m gonna try and ride the back for a bit more and see if it’ll just right itself as it has for a few others. Thanks a ton for yall’s help.
 

·
Registered
Joined
·
464 Posts
I don't know if the Z125 ECU specifically does this or not, but on many vehicles, if an error appears but then disappears, the CPU is often programmed to shut off the engine light after "x" engine start cycles have occurred without the error manifesting again. But, if the light does NOT go away, best go to the dealership and get it diagnosed.

Jim G
 

·
Registered
Joined
·
368 Posts
I pulled my O2 sensor when taking some wideband readings today, and now I have CEL. Disconnected battery, waiting, went through the whole turn key on, wait 5 seconds, turn key off, wait 5 seconds, to reset ECU but light remains... hoping after a few more starts it goes out. Anyone know how to clear?

Interesting wideband results coming later tonight....
 

·
Super Moderator
Joined
·
2,093 Posts
went through the whole turn key on, wait 5 seconds, turn key off, wait 5 seconds, to reset ECU but light remains.

Interesting wideband results coming later tonight....
Thats the procedure when replacing the ECU .
.
Check engine light is ....
.
Service Code Erasing
• The service codes stored in memory of the ECU can be erased using Kawasaki Diagnostic System
(KDS Ver.3).
If the Kawasaki Diagnostic System (KDS Ver.3) is not available, do the following procedures.
1. Turn on the ignition switch and start the engine.
2. Keep the idling speed more than 30 seconds.
3. Run the vehicle more than 5 minutes at a speed of 40 km/h (25 mph) or more.
Be sure to keep the engine running during procedures 2 and 3 for more than 10 minutes in total.
4. Turn the ignition switch off.
5. Repeat the above procedures 3 times.
6. Start the engine and check that the yellow engine warning indicator light (LED) goes off
.
 

·
Registered
Joined
·
464 Posts
Thats the procedure when replacing the ECU .
.
Check engine light is ....
.
Service Code Erasing
• The service codes stored in memory of the ECU can be erased using Kawasaki Diagnostic System
(KDS Ver.3).
If the Kawasaki Diagnostic System (KDS Ver.3) is not available, do the following procedures.
1. Turn on the ignition switch and start the engine.
2. Keep the idling speed more than 30 seconds.
3. Run the vehicle more than 5 minutes at a speed of 40 km/h (25 mph) or more.
Be sure to keep the engine running during procedures 2 and 3 for more than 10 minutes in total.
4. Turn the ignition switch off.
5. Repeat the above procedures 3 times.
6. Start the engine and check that the yellow engine warning indicator light (LED) goes off
.
In other words, this entire process mimics "3 normal start and use cycles". If the ECU does not detect an error, it assumes the problem was either transient or has been corrected and shuts off the check engine light.

Jim G
 
1 - 14 of 14 Posts
Top