Nissan March/Micra Stuck Shift Lock Repair

The shift lock is the mechanism that keeps the gear shift stuck in PARK unless the ignition is on and the foot brake is depressed.  There is also a manual override button, I guess intended for allowing the shift to neutral for towing etc even when the car is switched off.

For some time now, we’ve been resorting to the manual release button because the automatic mechanism doesn’t work.  (2003 Nissan March)

The mechanism is pretty simple.  Circuit diagram here: Micra K12 manual page 3912 on manuals.co .  There is a solenoid (black/white wires) in series with the brake switch, and a  microswitch (blue/white wire) that is closed when the shifter is in Park.

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Getting access to the mechanism is a matter of removing two screws either side of the centre cover at the rear (push seats forward to access). Lifting the cover from the back will pop out the two clips at the front.

Using a continuity tester I found the microswitch wasn’t closing when the shifter was in park. However, pressing it more firmly caused it to close.  Probably the plastic cam that presses the switch has finally worn too much.

I fixed this by moving the shift out of Park, and carefully bending the microswitch lever up towards the cam.  The above photo shows it closed now.

 

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Repair of Kenwood FP481 Food Processor

This is a follow up to my previous post.

Thanks to need a part, I got the spare parts I needed to repair the food processor. The price was enough to make me wince! : Upper drive belt $19.95, Upper cog $18.95, P&P $7, (+ Hand Blender geared lid $19.95).  But a combination of bloodymindedness and marginally OK economics meant I went ahead with this anyway.

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Out with the old and in with the new.

The drive belt is a direct replacement, but the toothed pulley is made for a shaft with 2 flats on it.

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Old pulley used nut to stop it spinning.

The new pulley lacks the square nut cage, so I can’t just drill it out for the round shaft.  I’ll grind the shaft down instead.

Success!

Now lets see if I can remember how this all goes back together.

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Reattach the motor to the top plate
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Attach the interlock mechanism
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And the interlock circuit board

Then reattach the on/off/speed/pulse switch.

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Done!

The final step is to put the bottom of the case back on and I’m back in business.

Success!