ESP Lateral Acceleration Sensor Circuit

ESP LATERAL ACCELERATION SENSOR CIRCUIT





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





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

Diagnostic Test
1. MEASURE THE VOLTAGE OF THE ESP LATERAL ACCELERATION SENSOR SIGNAL CIRCUIT
Turn the ignition off.
Disconnect the CAB harness connector.
Disconnect the ESP Lateral Acceleration Sensor harness connector.

Note: Check connectors - Clean/repair as necessary.

Turn the ignition on.





Measure the voltage of the ESP Lateral Acceleration Sensor Signal circuit at the ESP Lateral Acceleration Sensor harness connector.
Is voltage present?
Yes >> Repair the ESP Lateral Acceleration 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 LATERAL ACCELERATION SIGNAL CIRCUIT AND THE 5-VOLT SUPPLY CIRCUIT
With the ignition off.





Measure the resistance between the ESP Lateral Acceleration Sensor Signal circuit and the 5-Volt Supply circuit in the ESP Lateral Acceleration Sensor harness connector.
Is the resistance below 10K ohms?
Yes >> Repair the ESP Lateral Acceleration 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 LATERAL ACCELERATION SENSOR SIGNAL CIRCUIT
With the ignition off.





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

4. MEASURE THE RESISTANCE BETWEEN GROUND AND THE ESP LATERAL ACCELERATION 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 in the ESP Lateral Acceleration 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 LATERAL ACCELERATION 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 Lateral Acceleration Sensor Signal circuit.
Is the resistance below 10K ohms?
Yes >> Repair the ESP Lateral Acceleration Sensor Signal circuit for a short to ground. Perform ABS VERIFICATION TEST.
No >> Go to 7

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





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

8. MEASURE THE RESISTANCE BETWEEN GROUND AND THE ESP LATERAL ACCELERATION 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 LATERAL ACCELERATION SENSOR 5-VOLT SUPPLY CIRCUIT
With the ignition off.





Measure the resistance of the 5-Volt Supply circuit from the ESP Lateral Acceleration 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 Lateral Acceleration Sensor 5-Volt Supply circuit for an open. Perform ABS VERIFICATION TEST.