I have a 2002 and am getting "Service Active Handling" on display. When I check the error codes i get c1287 and c1288. I can not find any information on code c1288.
Anyone have any information? Also, just picked this one up used and if I have to spend a lot of $$ on a repair, I'll be sleeping in it. Anyone have an approximate cost of repair?

Thanks...second vett....second headache.

JM

 

The TCS code C1287 is "Steering Sensor Rate Malfunction"
but I can't find a C1288.
Not to be a wise guy, BUT if you transposed the numbers, under TCS I did find: C1277 "Requested Torque Signal Ckt Malfunction"
and C1278 "TCS Temporarily Inhibited By PCM"

FWIW

Joe

 

No...it's C1287 and C1288...just happend this morning again.

 

# DTC C1287 Steering Sensor Rate Malfunction
# DTC C1288 Steering Sensor Circuit Malfunction

 

Oh, here -- have a blast --

DTC C1287 or C1288
Circuit Description
The vehicle stability enhancement system (VSES) is activated by the EBCM calculating the desired yaw rate and comparing it to the actual yaw rate input. The desired yaw rate is calculated from measured steering wheel position, vehicle speed, and lateral acceleration. The difference between the desired yaw rate and actual yaw rate is the yaw rate error, which is a measurement of oversteer or understeer. If the yaw rate error becomes too large, the EBCM will attempt to correct the vehicle's yaw motion by applying differential braking to the left or right front wheel.

The amount of differential braking applied to the left or right front wheel is based on both the yaw rate error and side slip rate error. The side slip rate error is a function of the lateral acceleration minus the product of the yaw rate and vehicle speed. The yaw rate error and side slip rate error are combined to produce the total delta velocity error. When the delta velocity error becomes too large and the VSES system activates, the drivers steering inputs combined with the differential braking will attempt to bring the delta velocity error toward zero.

The VSES activations generally occur during aggressive driving, in the turns or bumpy roads without much use of the accelerator pedal. When braking during VSES activation, the brake pedal will feel different than the ABS pedal pulsation. The brake pedal pulsates at a higher frequency during VSES activation.

Conditions for Running the DTC
The ignition is ON.

Conditions for Setting the DTC
C1287
One of the following conditions exists:

The steering wheel position sensor is synchronized and the steer rate (speed that the steering wheel appears to be turning) is greater than 1100 degrees/second.
The steer rate is less than 80 degrees/second and the difference in the phase angle between Phase A and Phase B is greater than 20 degrees.
The 2 steering sensor signals (Phase A and Phase B) do not agree for 1 second. Under this condition, this DTC will set along with DTC C1281.
C1288
One of the following conditions exists:

Both Phase A and Phase B are greater than 4.9 volts for 1.6 seconds.
Both Phase A and Phase B are less than 0.2 volts for 1.6 seconds.
The difference in the changes in Phase A and Phase B is greater than 35.2 degrees for 9.76 milliseconds.
Action Taken When the DTC Sets
The EBCM disables the VSES for the duration of the ignition cycle.
The Traction Control and Active Handling indicator turns ON.
The DIC displays the Service Active Handling message.
The ABS remains functional.
Conditions for Clearing the DTC
The condition for the DTC is no longer present and the DTC is cleared with a scan tool.
The EBCM automatically clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles.
Diagnostic Aids
The scan tool may display 2 additional characters after the DTC. Take note of the 2 character code and any other DTCs that are set. The 2 character code is an engineering aid used in order to determine the specific criteria which caused the DTC to set.
During diagnosis, park the vehicle on a level surface.
Check the vehicle for proper alignment. The car should not pull in either direction while driving straight on a level surface.
Find out from the driver under what conditions the DTC was set (when the DIC displayed the Service Active Handling message). This information will help to duplicate the failure.
The Snapshot function on the scan tool can help find an intermittent DTC.
Test Description
The numbers below refer to the step numbers on the diagnostic table.

Perform the Steering Position Sensor Test in order to verify if the steering wheel position sensor (SWPS) is operating properly.

Tests for the proper operation of the steering wheel position signal A circuit in the low voltage range.

Tests for the proper operation of the steering wheel position signal B circuit in the low voltage range.

Tests for the proper operation of the steering wheel position signal A circuit in the high voltage range. If the fuse in the jumper opens when you perform this test, the signal circuit is shorted to ground.

Tests for the proper operation of the steering wheel position signal B circuit in the high voltage range. If the fuse in the jumper opens when you perform this test, the signal circuit is shorted to ground.

Tests for a short to voltage in the 5 volt reference circuit.

Tests for a high resistance or an open in the low reference circuit.

 

Thanks...happens on the bumpy road with little accleration. Guess I have to spend some bucks to get it fixed...driving me nuts. May go for days without problem...then can not go around block without DIC message. Any idea on repair cost?

 

I'm sorry, I have no idea. Could be as simple as a short to replacing things.

 

I had the same error on my 2000 Coupe 6-speed. Typically if you shut the car down wait a couple, restart, it will go away....for awhile. Until two months ago when it came up again and would not go away. Tried restarting, unplugging-replugging the battery to no avail.

In the end I took it to the dealer (Courtesy Chevrolet here in SJ CA) -- had no choice. Cost me about $200 (including an oil change) to get it fixed. I'll need to check my reciept for the exact cost. I talked to Larry (Service Advisor) at Courtesy -- great guy. He owns a C5 too and knows of this error (among other C5 issues that he has seen) and was very helpful.

It turned out to be a couple of fuses. They replaced them all and said it should be fine. But then about 3 weeks later it came on again. Shut the car down, re-strated buh bye. So far so good now.

I understand the frustration you are going through. I was going down HWY 101 by SJC, hit a pot hole which activate the error. After awhile the computer screen on my dash (and in my HUD) told me to basically slow down due to this "Service traction control" error. I ended up exiting, shutting the car down, restarting and proceed to go on my merry way.

Sometimes I wish I had just bought the Z51 model...!

 

Mine required a new computer. The cost was 800.

By the way they are really comfortable for sleeping if you move to the passenger seat and slide it forward and then recline it.

 

Is this a fairly popular error? I hear about computers needing replacement quite a bit, like BCM's and PCM's and so forth. How many miles were on your car when you had to drop the 800 bucks and which computer was it that they replaced?

 

Problem was with the steering sensor. Had to be replaced, as it failed all tests. Part is less than $100....but location is labor intensive. Final bill 465.00..
Thanks for all the posts.
J. Moe