C0196
DTC C0196
DTC Descriptors
DTC C0196 00
Yaw Rate Circuit No Additional Information
DTC C0196 28
Yaw Rate Circuit Incorrect Frequency
Diagnostic Fault Information
Important: Always perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Initial Inspection and Diagnostic Overview
Circuit/System 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.
Conditions for Running the DTC
^ The ignition is ON.
^ Ignition voltage is greater than 8 volts.
Conditions for Setting the DTC
C0196 00
^ The vehicle speed has reached at least 15 km/h (9 mph) from a stop more three times during the same ignition cycle. During the time the vehicle is stationary, the yaw rate signal value is more than 7 deg/sec for 2 seconds.
^ When vehicle speed is more than 25 km/h (16 mph) in a turn the difference between the yaw rate, steering angle, lateral acceleration, and wheel speed sensor values are not correlated three consecutive times.
^ Yaw rate changes greater than 20 deg/sec in 6 ms four times in one second.
^ The yaw/lateral combination sensor fails an internal self test.
C0196 28
The yaw frequency measured is not between 13400.0 - 14600.0 Hz for more than 200 msec.
Action Taken When the DTC Sets
The DIC displays the Service Stabilitrak message.
Conditions for Clearing the DTC
^ The condition for setting 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.
Reference Information
Schematic Reference
Antilock Brake System Schematics
Connector End View Reference
Antilock Brake System Connector End Views
Electrical Information Reference
^ Circuit Testing
^ Connector Repairs
^ Testing for Intermittent Conditions and Poor Connections
^ Wiring Repairs
Scan Tool Reference
Scan Tool Data List
Circuit/System Testing
C0196 00
1. Ignition OFF, disconnect the yaw rate sensor/lateral accelerometer connector.
2. Ignition OFF, test for less than 1.0 ohm of resistance between the low reference circuit and ground.
^ If greater than 1.0 ohm, test the low reference circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the EBCM.
3. Ignition ON, connect a 3-amp fused jumper wire between the 5-volt reference circuit and the yaw rate sensor signal circuit of the connector. Ignition ON, with the scan tool, verify yaw rate sensor signal parameter is 4.8 - 5.2 volts.
^ If over 5.2 volts, test yaw rate sensor signal circuit for short to voltage. If the circuits tests normal, replace the EBCM.
^ If under 4.8 volts, test yaw rate sensor signal circuit for open/high resistance or short to ground. If the circuits tests normal, replace the EBCM.
4. If all circuits test normal replace the yaw rate sensor/lateral accelerometer.
C0196 28
1. Ignition OFF, disconnect the yaw rate sensor/lateral accelerometer connector and EBCM connector.
2. Test for infinite resistance between the yaw rate frequency circuit and ground.
^ If less than infinite resistance, test the yaw rate frequency circuit for a short to ground.
3. Test for less than 1.0 ohm of resistance on the yaw rate frequency circuit between the yaw rate sensor/lateral accelerometer connector and EBCM connector.
^ If greater than 1.0 ohm, test the yaw rate frequency circuit for an open/high resistance.
4. Replace yaw rate sensor/lateral accelerometer. If C0196 28 is still current replace EBCM.
Repair Instructions
Important: Always perform the Diagnostic Repair Verification after completing the diagnostic procedure. Verification Tests
^ 1473
^ Control Module References for EBCM replacement, setup, and programming