abs problem with 4x4 low
Post Fiend
Joined: Jan 2003
Posts: 9,748
Likes: 16
From: Connecticut
Welcome!
I'm trying to think of what might be a common culprit between the 4WABS circuit and the 4x4 High/Low circuit, and three things come to mind:
(1) the vehicle speed sensor (VSS) located on the rear differential, which on 4x4 systems provides vehicle speed data directly to the 4WABS module (before said data even gets to the PCM). This same data is used by the 4x4 system when engaging/disengaging 4WD;
(2) the acceleration (G-Force) sensor which on 4x4 systems provides the 4WABS module with important deceleration information, and also with the data necessary for ABS to function properly in 4WD;
(3) the 4WABS module itself, based on what is described in #s 1 & 2 above.
I'm trying to think of what might be a common culprit between the 4WABS circuit and the 4x4 High/Low circuit, and three things come to mind:
(1) the vehicle speed sensor (VSS) located on the rear differential, which on 4x4 systems provides vehicle speed data directly to the 4WABS module (before said data even gets to the PCM). This same data is used by the 4x4 system when engaging/disengaging 4WD;
(2) the acceleration (G-Force) sensor which on 4x4 systems provides the 4WABS module with important deceleration information, and also with the data necessary for ABS to function properly in 4WD;
(3) the 4WABS module itself, based on what is described in #s 1 & 2 above.
