06 Prius stuck in diagnostic / inspection mode, does not exit!!

After a recent CHRS (inverter) pump and coolant sensor replacement, car was put in inspection mode (red car maintenance sign on LCD), after the need for the mode was over, no matter how many times we turned it off (ignition off) and on, it wont exit the inspection mode!

Since coolant was lost during repair there were air pockets which were later bled out using professional diagnostic/scan tool. Coolant was replaced for CHRS loop and not for the ICE engine.

My mechanic has tried his level best with resetting all code and everything but each time when you turn on the car it launches itself in the diagnostic/inspection/maintenance mode.

It also has an ABS speed sensor out, so ABS light is still on, but don't see why that should keep it locked in inspection mode? All lights are now gone except the ABS one.

It feels like its stuck there forever!

Any suggestions will be greatly appreciated.

Thank You,

 

Yes but how does that help with exiting diagnostic mode? I think all coolant level are good right now in all the three inlets.

 

It never enters the ready mode. When we try to restart (brake + start button) the "Maintenance/Inspection" (red car sign on LCD) keeps coming back.

I followed the instructions below to put the prius into maintenance mode ..

• Turn the vehicle to accessory mode, Ready-off. On 2001-2003 Prii this is two clicks forward of the key, on 2004+ this is pressing the start button twice with your foot off the brake pedal. The display will not show Ready but will otherwise be lit, the car in park.
• Depress the accelerator two times fully.
• Put the vehicle in neutral.
• Depress the accelerator two times fully.
• Put the vehicle back into park.
• Depress the accelerator two times fully.

Its really weird everywhere it says once you turn off the car and restart it should be back to normal, but somehow does not work in our case.

 

I will check again, after the CHRS pump was replaced and codes were cleared the check engine sign was gone.

I wasn't aware that red car sign on LCD was a problem sign and not just for the maintenance alone, last i looked there were no codes.

 

..and I still wonder why the car will not start ("Ready") even if there are error codes logged. No red triangles or anything.

 

But is there ever a reason for prius to not get into "Ready" mode even though are errors. This is what baffles me most.

I put it into maintenance mode to bleed the new pump, and ever since stuck with that mode, somehow during the process the maintenance mode sign caught other errors and stayed there as a problem sign?

 

OK will try out your suggestions, and report back. Thanks.

 

I guess it worked out after re-programming the ECM and clearing up all the existing codes. Mostly hit-n-trial?