Just done heads on a 4.6, noticed that the gear shift was flashing, just want to confirm my diagnosis which is xyz switch is knackered, couldn’t actually get the gear shift into low to try and shock it, apparently it’s been like it a while and drives ok, so I’m thinking the xyz has moved but not fully.
Answers on a postcard please
If you can't physically move the shifter into low, could it just be some cr@p fallen into the gate, or the arms on the H have been bent?
Flashing beside the gear change is usually a hi/lo transfer case thing rather than gearbox.
Does the dash show the correct gear selection? Does the gear shifter light correspond to the correct gear?
There is a microswitch in the H gate (buried a bit) which is what is triggered to then tell the transfer ECU to move between high/low range. I'd be checking that to see if it is being activated properly.
I would have thought that if it were XYZ switch, then you wouldn't have any gear feedback or it wouldn't match up on the indicator leds/dash to what gear you had selected
Martyuk wrote:
Flashing beside the gear change is usually a hi/lo transfer case thing rather than gearbox.
Does the dash show the correct gear selection? Does the gear shifter light correspond to the correct gear?
There is a microswitch in the H gate (buried a bit) which is what is triggered to then tell the transfer ECU to move between high/low range. I'd be checking that to see if it is being activated properly.
I would have thought that if it were XYZ switch, then you wouldn't have any gear feedback or it wouldn't match up on the indicator leds/dash to what gear you had selected
Cheers Marty, will have an investigation, as far as I know the gears are showing correctly, think he said happened after flicking sport button..
Orangebean wrote:
If you can't physically move the shifter into low, could it just be some cr@p fallen into the gate, or the arms on the H have been bent?
Good thinking, I’ll be getting the torch out,,
Also check the underseat fuses. Had this happen to me (and the opposite - both high and low lights steady) and on both occasions it was the fuses dirty or loose.
After the second occasion, gave it all a proper clean and never had a repetition.
One of the times (can't remember which - the flashing one I think) it drove in high, dash indication was correct but Nanocom said it was in low, so obviously something had got confused. Disconnection of the battery for 30 minutes saw that one disappear.
To be fair, since I moved house, I now use low box every day with no problems and am convinced a lack of use often throws up issues.
UPDATE,
Apparently the flashing gear change started after the sport button was pushed, and been flashing ever since.
The display is showing the correct gears and the box changes ok, but you can’t select low ratio box.
The battery has been disconnected with no change, any ideas anyone ?
Contacts stuck in the Sport button?