I think screwed up my steering wheel position sensor on my 2000. I just installed a supercharger and somehow missed the ever so important instruction telling me to make sure the steering wheel is not moved while the rack is out.

I have everything installed back in the car and I am getting the "Active Handling Warming Up" message that does not go away and I am throwing a C1278 code.

My sensor is a six wire. I have checked the voltage on the center blue wire and am getting voltages all over ranging from 0 to 13 volts.

From my understanding, at center the voltage should be 2.5 volts and then move up and down as the wheel is turned. As I said, mine jumps all over as the wheel is moved.

Does everyone agree with my assesment that it needs replaced?

Anyone know the GM part number so I can order it from Gene?

Thanks!!

 

It sounds like its done. Since its mounted at the base of the steering column, inside of the car, unless you removed the column, then its probably done. However, if you car is out of alignment, you will get the code for the sensor. The system expects to see the steering wheel back at the zero position (for lack of a better term in my case), within some small amount of time...45 seconds or similar while moving....seriously, I don't remember the exact time on that as its been a while since I had my C-5 manuals. Gene Culley will have it so check out his site first and see what it costs.

Position sensor - W/o telescoping column - W/o telescoping column
99-00

Part Number: 26058286
Steering column - Housing and components - Position sensor

Position sensor - W/telescoping column - W/telescoping column
99-00

Part Number: 26058286
Steering column - Housing and components - Position sensor

 

Any other codes?


DTC C1286 Strg/Lateral Accel Sensor Bias Malf (RPO JL4) Step
Action
Value(s)
Yes
No

1
Was the Diagnostic System Check performed?
--
Go to Step 2
Go to Diagnostic System Check - ABS

2
Is this vehicle equipped with Active Handling (RPO JL4)?
--
Go to Step 3
Go to DTC C1286 Steering Sensor Bias Malfunction

3
Using a scan tool, read ABS/TCS/Active handling DTC(s).

Is DTC C1282 or DTC C1284 set as a current DTC?
--
Go to Applicable DTC Table. Go to Diagnostic Trouble Code (DTC) List/Type
Go to Step 4

4
Point the front wheels straight ahead.
Using a scan tool, check the Steering Wheel Position Sensor Analog voltage.
Is the voltage within the range specified within the value(s) column?
2-3 V
Go to Step 5
Go to Step 11

5
Using a scan tool, perform the Steering Wheel Position Sensor Test. Refer to Scan Tool Diagnostics .

Are the analog and digital displays on the scan tool within plus or minus 5 degrees of each other at the center (zero) position?
--
Go to Step 6
Go to Step 12

6
Perform the Diagnostic Test Drive while monitoring the Yaw Rate Sensor output in degrees/seconds on a scan tool. Refer to Diagnostic System Check - ABS .

Are the degrees/second displayed on the scan tool within the range specified in the value(s) column?
0-5 degrees/second
Go to Step 8
Go to Step 7

7
Replace the Yaw Rate Sensor. Refer to Yaw Rate Sensor Replacement .

Is the replacement complete?
--
Go to Step 14
--

8
With the ignition switch in the ON position and the engine off, monitor the Lateral Accelerometer output in voltage using a scan tool.

Is the voltage displayed on the scan tool within the range specified in the value(s) column?
2.3-2.7 V
Go to Step 14
Go to Step 9

9
Replace the Lateral Accelerometer. Refer to Lateral Accelerometer Replacement .

Is the replacement complete?
--
Go to Step 14
--

10
Replace the EBCM. Refer to Electronic Brake Control Module (EBCM) Replacement .

Is the repair complete?
--
Go to Diagnostic System Check - ABS
--

11
Turn the ignition switch to the OFF position.
Disable the Supplemental Inflatable Restraint (SIR). Refer to Disabling the SIR System in SIR.
Remove the Inflatable Restraint Wheel Module Coil. Refer to Inflatable Restraint Steering Wheel Module Coil Replacement in Steering Wheel and Column.
Remove the Intermediate Shaft. Refer to Intermediate Steering Shaft Replacement in Steering Wheel and Column.
Turn the ignition switch to the ON position, engine off.
Using a scan tool monitor the Steering Wheel Position Sensors analog voltage as you rotate the steering column shaft.
Turn the steering column shaft until the analog voltage is close to 2.5 volts.
Does the analog voltage move to or close to 2.5 volts?
--
Go to Step 13
Go to Step 12

12
Replace the Steering Wheel Position Sensor. Refer to Steering Shaft, Lower Bearing, and Jacket - Disassemble - Off Vehicle in Steering Wheel and Column.

Is the replacement complete?
--
Go to Step 14
--

13
Leave the steering column shaft centered at 2.5 volts.
Turn the ignition switch to the OFF position.
Install the Intermediate Shaft. Refer to Intermediate Steering Shaft Replacement in Steering Wheel and Column.
Install the Inflatable Restraint Wheel Module Coil. Refer to Inflatable Restraint Steering Wheel Module Coil Replacement in Steering Wheel and Column.
Enable the SIR. Refer to Enabling the SIR System in SIR.
Is the repair complete?
--
Go to Step 14
--

14
Turn the ignition switch to the ON position, engine off.
Using a scan tool clear DTC C1286.
Drive vehicle above 30 km/h (18 mph) for several minutes.
Using a scan tool check for DTC C1286.
Did DTC C1286 set as a current DTC?
--
Go to Step 10
Go to Diagnostic System Check - ABS



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great info thx!

 

Thanks for the help. I cleared all the codes, since there was some in there from the supercharger. Now I am getting the "Active Handling Warming Up" that does not go away. I am not throwing any codes. I will take it for a longer drive this weekend and see what happens.