ESP Yaw Rate Sensor Circuit

ESP YAW RATE SENSOR CIRCUIT





When Monitored and Set Condition
^ When Monitored: Ignition on.
^ Set Condition: The Controller Antilock Brake (CAB) detects an Electronic Stability Program (ESP) Yaw Rate Sensor malfunction.





For a complete Electronic Stability Program (ESP) Circuit Diagram refer to Diagrams; Electrical.

Diagnostic Test
1. MEASURE THE VOLTAGE OF THE ESP YAW RATE SENSOR SIGNAL CIRCUIT
Turn the ignition off.
Disconnect the CAB harness connector.
Disconnect the ESP Yaw Rate Sensor harness connector.

Note: Check connectors - Clean/repair as necessary.

Turn the ignition on.





Measure the voltage of the ESP Yaw Rate Sensor Signal circuit at the ESP Yaw Rate Sensor harness connector.
Is voltage present?
Yes >> Repair the ESP Yaw Rate Sensor Signal circuit for a short to voltage. Perform ABS VERIFICATION TEST. ABS Verification Test
No >> Go to 2

2. MEASURE THE RESISTANCE BETWEEN THE ESP YAW RATE SIGNAL CIRCUIT AND THE 5-VOLT SUPPLY CIRCUIT
With the ignition off.





Measure the resistance between the ESP Yaw Rate Sensor Signal circuit and the 5-Volt Supply circuit in the ESP Yaw Rate Sensor harness connector.
Is the resistance below 10K ohms?
Yes >> Repair the ESP Yaw Rate Sensor Signal circuit for a short to the 5-Volt Supply circuit. Perform ABS VERIFICATION TEST.
No >> Go to 3

3. MEASURE THE RESISTANCE OF THE ESP YAW RATE SENSOR SIGNAL CIRCUIT
With the ignition off.





Measure the resistance of the ESP Yaw Rate Sensor Signal circuit from the CAB harness connector to the ESP Yaw Rate Sensor harness connector.
Is the resistance below 5.0 ohms?
Yes >> Go to 4
No >> Repair the ESP Yaw Rate Sensor Signal circuit for an open. Perform ABS VERIFICATION TEST.

4. MEASURE THE RESISTANCE BETWEEN GROUND AND THE ESP YAW RATE SENSOR GROUND CIRCUIT
With the ignition off.





Measure the resistance between ground and the Sensor Ground circuit.
Is the resistance below 10K ohms?
Yes >> Repair the Sensor Ground circuit for a short to ground. Perform ABS VERIFICATION TEST.
No >> Go to 5

5. MEASURE THE VOLTAGE OF THE 5-VOLT SUPPLY CIRCUIT
With the ignition off.
Reconnect the CAB harness connector.
Turn the ignition on.





Measure the voltage of the 5-Volt Supply circuit at the ESP Yaw Rate Sensor harness connector.
Is the voltage between 4.5 and 5.0 volts?
Yes >> Go to 6
No >> Go to 8

6. MEASURE THE RESISTANCE BETWEEN GROUND AND THE ESP YAW RATE SENSOR SIGNAL CIRCUIT
Turn the ignition off.
Disconnect the CAB harness connector.

Note: Check connectors - Clean/repair as necessary.





Measure the resistance between ground and the ESP Yaw Rate Sensor Signal circuit.
Is the resistance below 10K ohms?
Yes >> Repair the ESP Yaw Rate Sensor Signal circuit for a short to ground. Perform ABS VERIFICATION TEST.
No >> Go to 7

7. MEASURE THE RESISTANCE BETWEEN THE ESP YAW RATE SENSOR SIGNAL CIRCUIT AND THE SENSOR GROUND CIRCUIT
With the ignition off.





Measure the resistance between the ESP Yaw Rate Sensor Signal circuit and the Sensor Ground circuit in the ESP Yaw Rate Sensor harness connector.
Is the resistance below 10K ohms?
Yes >> Repair the ESP Yaw Rate Sensor Signal circuit for a short to the Sensor Ground circuit. Perform ABS VERIFICATION TEST.
No >> Replace the ESP Yaw Rate Sensor. Perform ABS VERIFICATION TEST.

8. MEASURE THE RESISTANCE BETWEEN GROUND AND THE ESP YAW RATE SENSOR 5-VOLT SUPPLY CIRCUIT
Turn the ignition off.
Disconnect the CAB harness connector.

Note: Check connectors - Clean/repair as necessary.





Measure the resistance between ground and the 5-Volt Supply circuit.
Is the resistance below 10K ohms?
Yes >> Repair the 5-Volt Supply circuit for a short to ground. Perform ABS VERIFICATION TEST.
No >> Go to 9

9. MEASURE THE RESISTANCE OF THE ESP YAW RATE SENSOR 5-VOLT SUPPLY CIRCUIT
With the ignition off.





Measure the resistance of the 5-Volt Supply circuit from the ESP Yaw Rate Sensor harness connector to the CAB harness connector.
Is the resistance below 5.0 ohms?
Yes >> Replace the Controller Antilock Brake. Perform ABS VERIFICATION TEST.
No >> Repair the ESP Yaw Rate Sensor 5-Volt Supply circuit for an open. Perform ABS VERIFICATION TEST.