Hi all, first post. I'm looking to buy a 2019 ST. The vehicle is stuck in 4LO with the 4LO flashing on the dash and the traction control off light on the dash. The strange thing is the 4LO light flashes in 4H and 2WD but the light goes solid when you select 4LO? In the video I'm switching between 4LO and 2WD you can see the light go solid when I select 4LO. Anyone got a best case/worst case scenario for me? Thanks in advance.
D23 4LO flashing and traction control warning light
- Thread starter Tom C
- Start date
Help Support Nissan Navara Forum:
Welcome aboard.
While the transfer case is actually in 4LO, if the switch is NOT in 4LO it will flash the indicator to let you know it's going to try changing things. That's why you're seeing what you're seeing.
4LO may be stuck because of a bad servo on the transfer case, but it could just as easily be damage inside (bent pawl, for instance) preventing the transfer case from changing back to normal gearing. You could try (preferably on a loose surface like dirt/grass/sand/gravel) turning the car this way and that as you slowly move forward and back again to see if it unsticks.
If it doesn't, there are two possibilities I've heard of:
1) Servo failure. Now this might just be a relay in the engine bay too - you'd need to check those. The transfer relays are marked inside the distribution box (not sure which one in that model). If the relays are all intact and operating, you could see if there's a voltage being sent to the servo or if the servo works when it's removed from the transfer case.
2) Physical fault inside the transfer case. What usually happens is a pair of pawls move and engage the front drive shaft (2HI -> 4HI) and then a gear change occurs with a 180 degree turn of the servo as the case moves from 4HI to 4LO. If something is interfering with the gears, even if it's a fragment of metal (like a broken tooth from the chain that's dropped into the wrong spot) it could cause this.
End result might even be the search through a bunch of wreckers for a replacement transfer case, so if you want to know "worst case", give a couple of wreckers a call and ask them what they'd charge for a transfer case.
While the transfer case is actually in 4LO, if the switch is NOT in 4LO it will flash the indicator to let you know it's going to try changing things. That's why you're seeing what you're seeing.
4LO may be stuck because of a bad servo on the transfer case, but it could just as easily be damage inside (bent pawl, for instance) preventing the transfer case from changing back to normal gearing. You could try (preferably on a loose surface like dirt/grass/sand/gravel) turning the car this way and that as you slowly move forward and back again to see if it unsticks.
If it doesn't, there are two possibilities I've heard of:
1) Servo failure. Now this might just be a relay in the engine bay too - you'd need to check those. The transfer relays are marked inside the distribution box (not sure which one in that model). If the relays are all intact and operating, you could see if there's a voltage being sent to the servo or if the servo works when it's removed from the transfer case.
2) Physical fault inside the transfer case. What usually happens is a pair of pawls move and engage the front drive shaft (2HI -> 4HI) and then a gear change occurs with a 180 degree turn of the servo as the case moves from 4HI to 4LO. If something is interfering with the gears, even if it's a fragment of metal (like a broken tooth from the chain that's dropped into the wrong spot) it could cause this.
End result might even be the search through a bunch of wreckers for a replacement transfer case, so if you want to know "worst case", give a couple of wreckers a call and ask them what they'd charge for a transfer case.
Great info thanks. I'll make some calls
Camionpilot
Member
A low battery will also cause the 4 lo switch to show on the dash .
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