• | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
• | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
• | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
---|---|---|---|---|
Ignition Voltage | C0710 00, U2142 00 | C0710 00, U2142 00 | -- | C0710 5A, C0186 5A, C0196 5A |
Low Reference | C0710 00, U2142 00 | C0710 00, U2142 00 | C0710 00, U2142 00 | C0710 5A, C0186 5A, C0196 5A |
CAN Bus High Serial Data | C0710 00, U2100 00, U2142 00, C0196 00 | C0710 00, U2142 00 | C0710 00, U2142 00 | C0710 5A, C0186 5A, C0196 5A |
CAN Bus Low Serial Data | C0710 00, U2142 00 | C0710 00, U2142 00 | C0710 00, U2100 00, U2142 00 | C0710 5A, C0186 5A, C0196 5A |
The lateral accelerometer and the yaw rate sensors are combined into one sensor external to the electronic brake control module (EBCM). The vehicle stability enhancement system (VSES) uses the lateral accelerometer input when calculating the desired yaw rate. The usable output signal is a serial data signal CAN high and CAN low serial data circuits.
The ignition switch is in the ON position.
• | The yaw/lateral combination sensor fails an internal self test. |
• | Communication is lost between the EBCM and the yaw/lateral combination sensor. |
• | The correlation error between the yaw/lateral combination sensor and steering angle sensor. |
One or more of the following actions may occur:
• | The vehicle stability enhancement system (VSES) is disabled. |
• | Traction control system (TCS) is disabled. |
• | The TCS/VSES indicators turn ON. |
• | The driver information center (DIC) displays the Service Traction Control, and or Service Stabilitrak message. |
• | The condition for the DTC is no longer present. |
• | The EBCM automatically clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles. |
Possible causes of this DTC are as follows:
• | CAN HI and CAN LO circuits shorted together |
• | CAN HI or CAN LO circuit shorted to ground |
• | CAN HI or CAN LO circuit shorted to voltage |
Antilock Brake System Schematics
Antilock Brake System Connector End Views
Scan Tool Data List for EBCM
⇒ | If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the EBCM. |
⇒ | If not within the specified range, test the ignition voltage circuit for a short to ground or open/high resistance. If the circuit tests normal, replace the EBCM. |
• | CAN Bus High serial data circuit terminal 37 |
• | CAN Bus Low serial data circuit terminal 24 |
⇒ | If greater than the specified value, test the appropriate serial data circuit for a short to voltage. |
• | CAN Bus High serial data circuit terminal 37 |
• | CAN Bus Low serial data circuit terminal 24 |
⇒ | If not the specified value, test the appropriate serial data circuit for a short to ground. |
• | CAN Bus High serial data circuit terminal 37 at the EBCM harness connector and terminal 3 at the Yaw Rate/Lateral Accelerometer sensor harness connector. |
• | CAN Bus Low serial data circuit terminal 24 at the EBCM harness connector and terminal 2 at the Yaw Rate/Lateral Accelerometer sensor harness connector. |
⇒ | If greater than the specified range, test the appropriate serial data circuit for an open/high resistance. If the circuit tests normal, replace the steering angle sensor. |
⇒ | If not the specified value, repair the serial data circuits for a short together. |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
• | Control Module References for EBCM replacement, setup, and programming |