Service AWD codes....

[Sastro1234]

Where do I even start with these..... busted the abs/speed sensor in the front passenger hub and lost awd, swapped the sensor and still have problems. Was able to get codes read but not sure if some are tied together or not. is it 4x4 swap time. I mainly drive in snow so the awd is preferred. Any input helps van is 2001 awd lifted and driven very hard in the mountains

[Sastro1234]

Do I just need a few drive cycles to clear things up since the codes are in history status?

[markmitch]

GM used two different AWD systems over the years in Astro/Safari vans so you need to tell us what year your van is to be helpful to you.

[AstroWill]

Make sure you search each of those codes, they might not mean exactly what is on that sheet.

With all of those issues I would say it's probably a power/ground/wiring issue. Some will always show if there is ANY problem with the ABS.

The AWD and ABS are two separate systems, AWD uses sensors on the transfer case to determine slipping, not the wheel speed sensors.


If they are not current codes and you recently fixed some wiring/connections/sensors/fuses/etc then I would clear them and go from there.

The AWD on these vans is fantastic in the snow!

[Sastro1234]

A loose ground had crossed my mind, I can’t seem to find the EBCM ground Waite anywhere on my van, should be left rear of the engine by the ebcm module itself correct? Iv referenced a ton of other posts but still can’t quite pin the location down.

[AstroWill]

It's on the back of the engine up by the knock sensor.

[Sastro1234]

On the block itself or on the frame?

[Leeann_93]

Block.

[Sastro1234]

Ahh I’ll have to dig into that this weekend, I did revelry swap out the AC lines and wonder if I knocked the ground wire lose pushing the line down.