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4LO indicator blinking

Tiny
UKAY
  • MEMBER
  • 2016 TOYOTA LANDCRUISER
  • 3.5L
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 13,461 MILES
There is a 4LO blinking and check light on, on my dash board. When scanned, code P163b: 4WD ECU Malfunction and P17d0: center Differential Lock Control SW Circuit was displaced. What will be the solutions to these please?
Monday, June 3rd, 2019 AT 2:50 AM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 43,074 POSTS
Hello,

I would check the system fuses and the 4wd ECU for corrosion at the wiring connector and if okay, let replace the transfer case ECU. Here is a guide to help check the fuses and diagrams below to show you where the unit is:

https://www.2carpros.com/articles/how-to-check-a-car-fuse

Check out the diagrams (below). Please let us know what you find. We are interested to see what it is.
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Tuesday, June 4th, 2019 AT 2:04 PM

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