DTC C1286 Steering Sensor Bias Malfunction
Thread Starter
Pro
Joined: Apr 2006
Posts: 534
Likes: 82
From: Charlotte NC
Here's what I've found so far: DTC 1286
Steering Sensor Bias Malfunction
The EBTCM monitors sterring wheel position to compensate for steering/suspension wear. If a centering change is detected, the EBTCM changes the digital and analog center position.
If the centering routines change +/- 30 degrees bias value, or if the last IGN cycle bias value was out of range, a DTC sets.
Actions Taken
Magna Steer is disabled. ABS/TCS remains active.
Conditions for Clearing
Condition not present and scan tool clears DTC.
50 IGN cycles with NO DTC's detected.
Diagnostic Aids
Steering wheel rotated with steering gear disconnected.
Faulty sterring wheel position SENSOR.
Faulty EBTCM.
Repair/diagnosis requires scan tool and disabling the Supplemental Inflatable Restraint (not recommended for DIY).
***************************
Usually this code indicates a bad Steering wheel position sensor or a sensor that needs to be re-calibrated because someone turned the steering wheel with it disconnected from the steering gear.
Steering Sensor Bias Malfunction
The EBTCM monitors sterring wheel position to compensate for steering/suspension wear. If a centering change is detected, the EBTCM changes the digital and analog center position.
If the centering routines change +/- 30 degrees bias value, or if the last IGN cycle bias value was out of range, a DTC sets.
Actions Taken
Magna Steer is disabled. ABS/TCS remains active.
Conditions for Clearing
Condition not present and scan tool clears DTC.
50 IGN cycles with NO DTC's detected.
Diagnostic Aids
Steering wheel rotated with steering gear disconnected.
Faulty sterring wheel position SENSOR.
Faulty EBTCM.
Repair/diagnosis requires scan tool and disabling the Supplemental Inflatable Restraint (not recommended for DIY).
***************************
Usually this code indicates a bad Steering wheel position sensor or a sensor that needs to be re-calibrated because someone turned the steering wheel with it disconnected from the steering gear.
Last edited by TimbrSS; May 18, 2006 at 02:06 AM.
Le Mans Master
Joined: Dec 2003
Posts: 5,561
Likes: 448
From: Atlanta metro Ga.
Originally Posted by TimbrSS
Here's what I've found so far: DTC 1286
Steering Sensor Bias Malfunction
The EBTCM monitors sterring wheel position to compensate for steering/suspension wear. If a centering change is detected, the EBTCM changes the digital and analog center position.
If the centering routines change +/- 30 degrees bias value, or if the last IGN cycle bias value was out of range, a DTC sets.
Actions Taken
Magna Steer is disabled. ABS/TCS remains active.
Conditions for Clearing
Condition not present and scan tool clears DTC.
50 IGN cycles with NO DTC's detected.
Diagnostic Aids
Steering wheel rotated with steering gear disconnected.
Faulty sterring wheel position SENSOR.
Faulty EBTCM.
Repair/diagnosis requires scan tool and disabling the Supplemental Inflatable Restraint (not recommended for DIY).
***************************
Usually this code indicates a bad Steering wheel position sensor or a sensor that needs to be re-calibrated because someone turned the steering wheel with it disconnected from the steering gear.
Steering Sensor Bias Malfunction
The EBTCM monitors sterring wheel position to compensate for steering/suspension wear. If a centering change is detected, the EBTCM changes the digital and analog center position.
If the centering routines change +/- 30 degrees bias value, or if the last IGN cycle bias value was out of range, a DTC sets.
Actions Taken
Magna Steer is disabled. ABS/TCS remains active.
Conditions for Clearing
Condition not present and scan tool clears DTC.
50 IGN cycles with NO DTC's detected.
Diagnostic Aids
Steering wheel rotated with steering gear disconnected.
Faulty sterring wheel position SENSOR.
Faulty EBTCM.
Repair/diagnosis requires scan tool and disabling the Supplemental Inflatable Restraint (not recommended for DIY).
***************************
Usually this code indicates a bad Steering wheel position sensor or a sensor that needs to be re-calibrated because someone turned the steering wheel with it disconnected from the steering gear.
Thread Starter
Pro
Joined: Apr 2006
Posts: 534
Likes: 82
From: Charlotte NC
Well, I tried reading the voltage off the steering sensor by back probing the connection. I tried both the green and blue wires in the middle (information I gathered from other posts on the subject). I couldn't get a good reading from that, as readings would jump from 0 to 11.xx volts by turning the wheel 1/8". I just disconnected the wheel and rotated it 360* to the right, and reconnected. Seems to have fixed the problem, as the DTC has not returned.
Thanks Dan for the help.
Thanks Dan for the help.
