Diagnostic Instructions

DTC Descriptor

DTC C0186 4B: Lateral Acceleration Sensor Circuit Calibration Not Learned

DTC C0186 5A: Lateral Acceleration Sensor Circuit Not Plausible

DTC C0186 71: Lateral Acceleration Sensor Circuit Invalid Data

DTC C0196 00: Yaw Rate Circuit Malfunction

DTC C0196 5A: Yaw Rate Circuit Not Plausible

DTC C0196 71: Yaw Rate Signal Invalid Data

DTC C019B 5A: Yaw Rate Signal Not Plausible

Diagnostic Fault Information

Circuit	Short to Ground	Open/High Resistance	Short to Voltage	Signal Performance
12 V Reference	U0125, U0126	U0125, U0126	--	--
CAN Bus High Serial Data	U0073, U0100, U0101, U0125, U0126, U0140	U0073, U0100, U0101, U0125, U0126, U0140	U0073, U0100, U0101, U0125, U0126, U0140	C0186 5A, C0186 71, C0196 00, C0196 5A, C0196 71, C019B 5A
CAN Bus Low Serial Data	U0073, U0100, U0101, U0125, U0126, U0140	U0073, U0100, U0101, U0125, U0126, U0140	U0073, U0100, U0101, U0125, U0126, U0140	C0186 5A, C0186 71, C0196 00, C0196 5A, C0196 71, C019B 5A
Ground	--	U0125	--	--

Circuit/System Description

The yaw rate and lateral acceleration sensors are combined into one multi-axis sensor, external to the electronic brake control module (EBCM). The EBCM supplies a 12 V reference voltage to the multi-axis sensor. The multi-axis sensor communicates with the EBCM via the high speed controller area network (CAN) serial data circuit. The EBCM activates the stability control function depending on multi-axis sensor input.

Conditions for Running the DTC

Ignition ON

Conditions for Setting the DTC

C0186 4B

The lateral acceleration sensor is not calibrated.

C0186 5A

The lateral acceleration sensor signal is not plausible with the yaw rate sensor signal, steering angle sensor signal and vehicle speed for 0.5-2 s.

C0186 71

The lateral acceleration sensor signal offset is out of specified range.

C0196 00

The yaw rate sensor signal is out specified range.

C0196 5A

The yaw rate sensor signal is not plausible with the lateral acceleration sensor signal, steering angle sensor signal and vehicle speed for 0.25-2 s

C0196 71

The yaw rate sensor offset is out of specified range.

C019B 5A

The yaw rate sensor signal is out of specified range.

Action Taken When the DTC Sets

Conditions for Clearing the DTC

Reference Information

Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

ABS Description and Operation

Electrical Information Reference

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

Ignition ON, observe the scan tool Lateral Acceleration Signal and Yaw Rate Sensor parameters. On a level surface, the readings should be 0 V.

Circuit/System Testing

1. Ignition ON, verify that DTC C0186 4B is not present.

⇒	If DTC C0186 4B is present, perform the Vehicle Yaw Sensor Learn.

2. Ignition OFF, disconnect the harness connector at the B119 Yaw and Lateral Accelerometer Sensor.
3. Test for less than 5 Ω between the ground circuit terminal 6 and ground.

⇒	If greater than the specified value, test the ground circuit for an open/high resistance.

4. Ignition ON, test for greater than 11 V between the 12 V reference circuit terminal 5 and ground.

⇒	If less than the specified value, test the 12 V reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K17 Electronic Brake Control Module (EBCM).

5. If all circuits test normal, replace the B119 Yaw and Lateral Accelerometer Sensor and verify the DTC does not reset.

⇒	If the DTC resets, replace the K17 Electronic Brake Control Module (EBCM).

Repair Instructions