C0196
DTC C0196
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (Initial Inspection and Diagnostic Overview) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Initial Inspection and Diagnostic Overview) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Initial Inspection and Diagnostic Overview) provides an overview of each diagnostic category.
DTC Descriptor
DTC C0196 00
- Yaw Rate Circuit
Diagnostic Fault Information
Circuit Description
The vehicle stability enhancement system (VSES) is activated by the electronic brake control module (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 wheels.
To correct for oversteer, differential braking is used on the left front or right front wheel brake. To correct for understeer, differential braking is used on the left rear or right rear wheel brake.
Conditions for Running the DTC
* The ignition is ON.
* The vehicle speed is greater than 40 km/h (25 mph).
Conditions for Setting the DTC
The EBCM performs different tests to detect a DTC condition. A malfunction is detected when the yaw rate sensor signal input voltage is less than 0.225 volts or greater than 4.775 volts for more than 100 milliseconds.
Action Taken When the DTC Sets
If equipped, the following actions occur:
* The EBCM disables the traction control system (TCS)/VSES for the duration of the ignition cycle.
* A malfunction DTC will set.
* The antilock brake system (ABS) indicator turns ON.
* The Stability Off indicator turns ON.
* The red BRAKE indicator could turn ON.
Conditions for Clearing the DTC
* The condition for the DTC is no longer present.
* A history DTC will clear after 100 consecutive ignition cycles if the condition for the malfunction is no longer present.
* Using a scan tool
Diagnostic Aids
The following conditions may cause a malfunction:
* Open in the yaw rate signal circuit
* Short to ground in the yaw rate signal circuit
* Short to voltage in the yaw rate signal circuit
* Open in the yaw rate ground circuit
* Open in ignition voltage circuit
* Malfunctioning vehicle yaw/lateral accelerometer sensor
* Malfunctioning EBCM
Reference Information
Schematic Reference
* Antilock Brake System Schematics ([1][2]Antilock Brakes / Traction Control Systems)
* Power Distribution Schematics (Power Distribution Diagrams)
Connector End View Reference
Component Connector End Views (Connector Views)
Description and Operation
ABS Description and Operation (Description and Operation)
Electrical Information Reference
* Circuit Testing (Component Tests and General Diagnostics)
* Connector Repairs (Component Tests and General Diagnostics)
* Testing for Intermittent Conditions and Poor Connections (Component Tests and General Diagnostics)
* Wiring Repairs (Component Tests and General Diagnostics)
Scan Tool Reference
Control Module References (Programming and Relearning) for scan tool information
Circuit/System Testing
1. Ignition OFF, disconnect the EBCM harness connector at the Yaw and Lateral Accelerometer Sensor.
2. Ignition OFF, with a DMM test for less than 5.0 ohms between the Vehicle Yaw and Lateral Accelerometer Sensor ground circuit terminal 6 and ground.
• If greater than the specified range, with the DMM test the low reference circuit terminal 6 for an open/high resistance. If the circuit tests normal, replace the EBCM.
3. Ignition ON, with a DMM test for 0.225-4.775 volts between the Yaw and Lateral Accelerometer Sensor lateral accelerometer signal circuit terminal 5 and ground.
• If less than the specified range, with the DMM test the lateral accelerometer signal circuit terminal 5 for a short to ground or an open/high resistance. If the circuit tests normal, replace the EBCM.
• If greater than the specified range, with the DMM test the lateral accelerometer signal circuit terminal 5 for a short to voltage. If the circuit tests normal, replace the EBCM.
4. Ignition ON, with a DMM test for 0.225-4.775 volts between the Yaw and Lateral Accelerometer Sensor yaw rate signal circuit terminal 4 and ground.
• If less than the specified range, with the DMM test the yaw rate signal circuit terminal 4 for a short to ground or an open/high resistance. If the circuit tests normal, replace the EBCM.
• If greater than the specified range, with the DMM test the yaw rate signal circuit terminal 4 for a short to voltage. If the circuit tests normal, replace the EBCM.
5. Ignition ON, with the DMM, test for battery voltage at the Vehicle Yaw and Lateral Accelerometer Sensor Ignition 1 terminal 3 circuit and the ground circuit terminal 6.
• If less than the specified value, test the ignition circuit terminal 3 for a open/high resistance. If the circuit tests normal, replace the EBCM.
6. Install a 3A fused jumper wire between the Yaw and Lateral Accelerometer Sensor signal circuit terminal and the Yaw and Lateral Accelerometer Sensor Volt reference circuit terminal 3. With a DMM, verify the voltage range is 2-3 volts.
• If less than the specified value, test the 5-volt reference circuit terminal 3 for a short to ground or an open/high resistance. If the circuit tests normal, replace the EBCM.
• If greater than the specified value, test the 5-volt reference circuit terminal 3 for a short to voltage. If the circuit tests normal, replace the EBCM.
7. If all circuits test normal, test or replace the Yaw and Lateral Accelerometer Sensor.
Component Testing
1. Install a 3A fused jumper wire between the Yaw and Lateral Accelerometer Sensor Volt reference terminal 1 and 5 volts. Install a jumper wire between the low reference circuit terminal 6 and ground.
2. Sweep the sensor through the entire range while monitoring the resistance between the signal circuit terminal 5 and the low reference circuit terminal 6. The voltage should vary between 0.25-4.75 volts without any spikes or dropouts.
• If not within the specified range or is erratic, replace the Yaw and Lateral Accelerometer Sensor.
Repair Instructions
Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.
* Vehicle Yaw Sensor with Vehicle Lateral Accelerometer Replacement (Service and Repair)
* Steering Wheel Position Sensor or Steering Shaft Lower Bearing Replacement (Steering Wheel Position Sensor or Steering Shaft Lower Bearing Replacement)
* Control Module References (Programming and Relearning) for EBCM replacement, setup, and programming