I have a mazda 2004 bk 1.6 it has P0602 P0610 code

Hello, Welcome to Just Answer My name is \*\*\*\*\* \*\*\*\*\* I've been an automotive engineer since 1996 and together we're going to solve this issue. I understand that having your trusted vehicle let you down can be frustrating as it rarely occurs at a convenient time, however I will do my best to either help you make the repairs yourself or at least understand the issue so you know what is involved. to have both of those codes then this indicates the ECU is not getting full power so I'd begin by checking the condition of the ECU power supply relays and fuses in the under hood fusebox I'd also say to use a meter on the battery and check that you have at least 12V with the ignition on and then measure the voltage again during cranking and then once more with the engine running the cranking voltage shouldn't drop below 10V if it does then its possible the battery needs replacing and the engine running voltage should be greater than the 12V you measured in the 1st place and should climb to about 13.8 v if this last one isn't true then the alternator is possibly faulty or its not being switched on by the ECM so if the battery checks out I'd next check that the engine ground wires ( the large wires between engine, battery and chassis) are all tightly connected and corrosion free if this is OK then check the condition of the ECU plug for any corroded pins or wiring harness damage

Sir I changed battery terminal and i had tight gearbox mounted ground and cleaned i did and i check 5 ecu 12v power and grounds wire also giving beep

OK in that case I'd say to send the ECU off for testing at this firm in India https://www.thecarengineers.com/