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Old Apr 8, 2008 | 08:11 PM
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kid81
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I just pulled some codes from the car (1998)and this is what I found. I know what it says but could someone help me translate it into other words I may understand. A newby to the codes....
C1286HC VSES sensor uncorrected...
B0361HC HVAS actuator feedback circut..

The rest of the codes ended with an "H" so should I bother with them or just reset?? any help would be great
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Old Apr 8, 2008 | 11:39 PM
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Originally Posted by kid81
I just pulled some codes from the car (1998)and this is what I found. I know what it says but could someone help me translate it into other words I may understand. A newby to the codes....
C1286HC VSES sensor uncorrected...
B0361HC HVAS actuator feedback circut..

The rest of the codes ended with an "H" so should I bother with them or just reset?? any help would be great
B0361 - The HVAC control module commands the left air temperature actuator to move by controlling the voltage supplied on the control circuit. A low voltage of 0 volts moves door toward full cold. A voltage of 2.5 volts stops the door. A high voltage of 5 volts moves the door toward full hot. The HVAC control module determines the current position of the actuator by monitoring the voltage on the signal circuit. The feedback potentiometer is a function of the motor position. A high voltage of 4-5 volts indicates full cold door position. A low voltage of less than 1 volt indicates full hot door position. The HVAC control module controls the left air temperature actuator door positions in order to maintain the selected air temperature.


Conditions for Running the DTC

The ignition is turned ON.


Conditions for Setting the DTC

The HVAC control module detects the signal circuit is less than 5 counts (0.09 V).


Action Taken When the DTC Sets

A default value will be used for the sensor data by the HVAC control module in an attempt to maintain the air temperature selected by the driver. This default value will be displayed on the scan tool.


Conditions for Clearing the DTC

* The DTC will become history if the HVAC control module no longer detects a failure.
* The history DTC will clear after 100 fault free ignition cycles.
* The DTC can be cleared with a scan tool.


Check the following conditions:

A disconnected or broken door may also set this DTC by allowing the left air temperature actuator to travel to its internal stops, an overtravel condition.




C1286 - The vehicle stability enhancement system (VSES) is activated by the electronic brake control mdoule (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 steer angle has been centered.


Conditions for Setting the DTC

The steering sensor bias moves greater than 40 degrees after steer centering was accomplished.


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.
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