Can anyone with a Tech 2 tell me if the C6 Steering Position sensor shows an angle?
04-08-2017, 11:58 AM
#1
Can anyone with a Tech 2 tell me if the C6 Steering Position sensor shows an angle?
Is this normal?
Regardless of steering wheel angle, the tech II is always showing 0 degrees. The voltages do change as turned, however.
One turn to the left:
SWPS Signal A: 2.49v
SWPS Signal B: 0.00v
Steering Position Senso: 0°
180 degrees to the left:
SWPS Signal A: 2.49v
SWPS Signal B: 5.00v
Steering Position Senso: 0°
Center:
SWPS Signal A: 2.61v
SWPS Signal B: 0.10v
Steering Position Senso: 0°
180 degrees to the right:
SWPS Signal A: 2.49v
SWPS Signal B: 5.00v
Steering Position Senso: 0°
One turn to the right:
SWPS Signal A: 2.51v
SWPS Signal B: 0.02v
Steering Position Senso: 0°
I would have thought the steering position sensor angle would show something changing.. The voltages do sweep when turning, e.g., Signal B sweeps from 0v to 5v over every 180 degrees of turn. I have no idea how the thing knows its straight vs 360 degrees one way or the other because the voltages are the same in both cases!
Reason I'm asking is that the sensor itself looks a little flimsy/loosely attached and I'm not sure if this is normal or not.
Regardless of steering wheel angle, the tech II is always showing 0 degrees. The voltages do change as turned, however.
One turn to the left:
SWPS Signal A: 2.49v
SWPS Signal B: 0.00v
Steering Position Senso: 0°
180 degrees to the left:
SWPS Signal A: 2.49v
SWPS Signal B: 5.00v
Steering Position Senso: 0°
Center:
SWPS Signal A: 2.61v
SWPS Signal B: 0.10v
Steering Position Senso: 0°
180 degrees to the right:
SWPS Signal A: 2.49v
SWPS Signal B: 5.00v
Steering Position Senso: 0°
One turn to the right:
SWPS Signal A: 2.51v
SWPS Signal B: 0.02v
Steering Position Senso: 0°
I would have thought the steering position sensor angle would show something changing.. The voltages do sweep when turning, e.g., Signal B sweeps from 0v to 5v over every 180 degrees of turn. I have no idea how the thing knows its straight vs 360 degrees one way or the other because the voltages are the same in both cases!
Reason I'm asking is that the sensor itself looks a little flimsy/loosely attached and I'm not sure if this is normal or not.
04-09-2017, 10:40 AM
#2
Safety Car
My Envoy has analog for the angle and digital to show wheel movement. Is your ah malfunctioning? When I put a heater core in the Envoy I got the sensor clocked in there wrong and the voltage was acting weird until I got it right.
04-09-2017, 01:47 PM
#3
Tech Contributor
Member Since: Oct 1999
Location: Charlotte, NC (formerly Endicott, NY)
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Is this normal?
Regardless of steering wheel angle, the tech II is always showing 0 degrees. The voltages do change as turned, however.
One turn to the left:
SWPS Signal A: 2.49v
SWPS Signal B: 0.00v
Steering Position Senso: 0°
180 degrees to the left:
SWPS Signal A: 2.49v
SWPS Signal B: 5.00v
Steering Position Senso: 0°
Center:
SWPS Signal A: 2.61v
SWPS Signal B: 0.10v
Steering Position Senso: 0°
180 degrees to the right:
SWPS Signal A: 2.49v
SWPS Signal B: 5.00v
Steering Position Senso: 0°
One turn to the right:
SWPS Signal A: 2.51v
SWPS Signal B: 0.02v
Steering Position Senso: 0°
I would have thought the steering position sensor angle would show something changing.. The voltages do sweep when turning, e.g., Signal B sweeps from 0v to 5v over every 180 degrees of turn. I have no idea how the thing knows its straight vs 360 degrees one way or the other because the voltages are the same in both cases!
Reason I'm asking is that the sensor itself looks a little flimsy/loosely attached and I'm not sure if this is normal or not.
Regardless of steering wheel angle, the tech II is always showing 0 degrees. The voltages do change as turned, however.
One turn to the left:
SWPS Signal A: 2.49v
SWPS Signal B: 0.00v
Steering Position Senso: 0°
180 degrees to the left:
SWPS Signal A: 2.49v
SWPS Signal B: 5.00v
Steering Position Senso: 0°
Center:
SWPS Signal A: 2.61v
SWPS Signal B: 0.10v
Steering Position Senso: 0°
180 degrees to the right:
SWPS Signal A: 2.49v
SWPS Signal B: 5.00v
Steering Position Senso: 0°
One turn to the right:
SWPS Signal A: 2.51v
SWPS Signal B: 0.02v
Steering Position Senso: 0°
I would have thought the steering position sensor angle would show something changing.. The voltages do sweep when turning, e.g., Signal B sweeps from 0v to 5v over every 180 degrees of turn. I have no idea how the thing knows its straight vs 360 degrees one way or the other because the voltages are the same in both cases!
Reason I'm asking is that the sensor itself looks a little flimsy/loosely attached and I'm not sure if this is normal or not.
In the 05-08 models you have two analog voltages that change out of phase with each other and that is how the EBCM knows how much the steering wheel is being turned and in which direction.
In the 09-13 models the steering angle data is sent to the EBCM on the CAN Bus which means it is being sent as a digital signal.
I am attaching the pertinent sections of the factory diagnostic procedures from the Service Manuals.
Bill
Last edited by Bill Dearborn; 04-09-2017 at 01:47 PM.
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carefulnow (04-09-2017)
04-09-2017, 02:11 PM
#4
I don't have a Tech 2 but I did take a look through the C6 ABS info to see how the Steering Sensor fails. If you are getting analog voltages that implies you have an 05 through 08 car. The system changed for the 09 through 13 models.
In the 05-08 models you have two analog voltages that change out of phase with each other and that is how the EBCM knows how much the steering wheel is being turned and in which direction.
In the 09-13 models the steering angle data is sent to the EBCM on the CAN Bus which means it is being sent as a digital signal.
I am attaching the pertinent sections of the factory diagnostic procedures from the Service Manuals.
Bill
In the 05-08 models you have two analog voltages that change out of phase with each other and that is how the EBCM knows how much the steering wheel is being turned and in which direction.
In the 09-13 models the steering angle data is sent to the EBCM on the CAN Bus which means it is being sent as a digital signal.
I am attaching the pertinent sections of the factory diagnostic procedures from the Service Manuals.
Bill
EDIT: No codes.
Last edited by carefulnow; 04-09-2017 at 05:13 PM.