Parking brake transmission actuator set up and calibration.

[Brettfcars]

I am having a problem with the transmission mounted actuator. Neutral is flashing on gear leaver.
It is moving under test to park or neutral, however the calibrate function via the ISTA tool doesn’t work.
In set up it can be driven from N to P and P to N.
When calibrating it moves to neutral, but doesn’t compleat the move to park. But it can be heard to move to park and car wheels are locked. There is a 40+ second count down that doesn’t get past about 3 seconds. Before saying the calibration can not be completed.
I am trying to understand what I am doing wrong.

What is correct alignment and procedure for fitting new actuator ?
I fitted it when actuator pointing at P and shaft turned to, and clicked in to park position (indent) with wheels checked not to rotate.
I have 2 actuators behaving the same.
Turning the shaft to neutral aligns with neutral on the actuator and shaft is found to feel as if going in second indent position.
I don’t think alignment is wrong.

Wiring suggests motor is driven by wires 1 & 6, reversing polarity for rotation.
2 & 5 are electronics power. Neural & feed.
3 & 4 are feedback.
Not sure what correct wire feed back would be ?

 

[Brettfcars]

Ok to conclude this issue…..
After much head scratching, fitting and removing actuator 3 times which is not easy on a Rex version, and the testing of 2 actuators I ended up testing the wiring.
I tested the EME socket to actuator socket, and wiring was ok.
I then tested the resistance values to earth on the EME socket pins, writing the values down for all pins.
I don’t know what values should be, but nothing suggested a short on any coms wiring.
I then plugged back in the EME plug to the socket and measured the resistance values at the actuator plug.
Turns out all were ok apart from Blue wire 34 in EME to 5 in actuator.
This showed a very high resistance value, so would guess any measured values were corrupted?

Investigation found the pin fractured at the wire joint !

This has been repaired and now the actuator has completed programming and the car driving !

 

[EvanstonI3]

How would the pin get fractured?

 

[Brettfcars]

Hi,
I don’t know how.
The wire is fractured where it is crimped to the connector, so either vibration or under tension?
Repair I made is temporary, with a good second hand loom on its way to me.
I would of expected a fault such as this to be sporadic, but it was consistently very high resistance.
I started to investigate pin type and was to order a few, then found secondhand loom for under £20.