ESP Brake Pressure Sensor 2 Circuit

ESP BRAKE PRESSURE SENSOR 2 CIRCUIT





When Monitored and Set Condition
^ When Monitored: Ignition on.
^ Set Condition: The Controller Antilock Brake (CAB) detects an Electronic Stability Program (ESP) Brake Pressure Sensor 2 malfunction.





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

Diagnostic Test
1. MEASURE THE VOLTAGE OF THE ESP BRAKE PRESSURE SENSOR 2 SIGNAL CIRCUIT
Turn the ignition off.
Disconnect the CAB harness connector.
Disconnect the ESP Brake Pressure Sensor 2 harness connector.

Note: Check connectors - Clean/repair as necessary.

Turn the ignition on.





Measure the voltage of the ESP Brake Pressure Sensor 2 Signal circuit at the ESP Brake Pressure Sensor 2 harness connector.
Is voltage present?
Yes >> Repair the ESP Brake Pressure Sensor 2 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 BRAKE PRESSURE 2 SIGNAL CIRCUIT AND THE 5-VOLT SUPPLY CIRCUIT
Turn the ignition off.





Measure the resistance between the ESP Brake Pressure Sensor 2 Signal circuit and the 5-Volt Supply circuit in the ESP Brake Pressure Sensor 2 harness connector.
Is the resistance below 10K ohms?
Yes >> Repair the ESP Brake Pressure Sensor 2 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 BRAKE PRESSURE SENSOR 2 SIGNAL CIRCUIT
With the ignition off.





Measure the resistance of the ESP Brake Pressure Sensor 2 Signal circuit from the CAB harness connector to the ESP Brake Pressure Sensor 2 harness connector.
Is the resistance below 5.0 ohms?
Yes >> Go to 4
No >> Repair the ESP Brake Pressure Sensor 2 Signal circuit for an open. Perform ABS VERIFICATION TEST.

4. MEASURE THE RESISTANCE BETWEEN GROUND AND THE ESP BRAKE PRESSURE SENSOR 2 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 Brake Pressure Sensor 2 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 BRAKE PRESSURE SENSOR 2 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 Brake Pressure Sensor 2 Signal circuit.
Is the resistance below 10K ohms?
Yes >> Repair the ESP Brake Pressure Sensor 2 Signal circuit for a short to ground. Perform ABS VERIFICATION TEST.
No >> Go to 7

7. MEASURE THE RESISTANCE BETWEEN THE ESP BRAKE PRESSURE SENSOR 2 SIGNAL CIRCUIT AND THE SENSOR GROUND CIRCUIT
With the ignition off.





Measure the resistance between the ESP Brake Pressure Sensor 2 Signal circuit and the Sensor Ground circuit in the ESP Brake Pressure Sensor 2 harness connector.
Is the resistance below 10K ohms?
Yes >> Repair the ESP Brake Pressure Sensor 2 Signal circuit for a short to the Sensor Ground circuit. Perform ABS VERIFICATION TEST.
No >> Replace the ESP Brake Pressure Sensor 2. Perform ABS VERIFICATION TEST.

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





Measure the resistance of the 5-Volt Supply circuit from the ESP Brake Pressure Sensor 2 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 Brake Pressure Sensor 5-Volt Supply circuit for an open. Perform ABS VERIFICATION TEST.