What are the steps required to replace ecu on 2003 zx6r

Take it to a main dealer and they can fit a new switch and pair it with the ECU if needed.

The vehicle's ECU is not getting required power. It does not mean that the ECU is faulty but the faulty fuse can be the problem. Inspect the fuse and replace them if necessary.

I'm doing the same thing with a 09 zx6r motor and ran into the same problem came to find out the factory ignition switch has a 100 ohm resistor built in on the hot in wire for anti theft

Sounds like it's time for a valve adjustment.
clearances are:
exhaust .22 - .31
intake .11 - .19
Checking clearance should be very simple but adjusting requires cam and lifter removal and different size shims underneath.

Good luck, i hope this helps.

the horn is only held on by 1 bolt,undo this and remove the 2 wires then just reverse these steps to refit

Should they not go to the fuel relay?

Hi, Thermostat yes. That is the next troubleshooting step. Good Luck!

2003-04 Mazda 6 REMOTE PROGRAMMING


Step 1: Open drivers door and leave open.

Step 2: Lock and unlock the driver’s door using the power door lock switch on the door.

Step 3: Insert key into the ignition.

Step 4: Turn key to on position and return to off position. (IMPORTANT - use ON position NOT ACC position). Do this 3 times within 10 seconds. Leave key in the ignition.

Step 5: Open and close the driver’s door 3 times. (Door should be left open after this step).

Step 6: ECU should respond by locking and unlocking the doors.

Step 7: Press any button on remote #1 twice. ECU responds by locking and unlocking the car doors.

Step 8: Press any button on remote #2 (etc.) twice. Each time the ECU will respond by locking & unlocking the doors.

Step 9: Remove the key from the ignition and the ECU will respond a final time with a series of door locks and unlocks. You're done!

Good Luck.