1000 - 1999: 1351

1351 - YAW RATE/ACCELERATION SENSOR UNDERVOLTAGE





When Monitored and Set Condition

- When Monitored: Ignition on.
- Set Condition: The Controller Antilock Brake (CAB) detects a ESP Yaw Rate/Lateral Acceleration Sensor Undervoltage condition.





For a complete Antilock Brake System (ABS) Circuit Diagram Brakes - ABS Electrical Diagnostics.

Diagnostic Test

1. MEASURE THE YAW RATE/ACCELERATION SENSOR 5 VOLT SUPPLY CIRCUIT




Turn the ignition off.
Disconnect the Yaw Rate/Acceleration Sensor harness connector.

NOTE: Check connectors - Clean/repair as necessary.

Turn the ignition on.
Measure the voltage of the Yaw Rate/Acceleration Sensor 5 Volt Supply circuit at the Yaw Rate/Acceleration Sensor harness connector.
Is the voltage between 4.5 and 5.0 volts?

No

- Go to 2

Yes

- Replace the Yaw Rate/Acceleration Sensor. Removal.
- Perform ABS VERIFICATION TEST. ABS Verification Test

2. MEASURE THE RESISTANCE BETWEEN GROUND AND THE YAW RATE/ACCELERATION SENSOR 5-VOLT SUPPLY CIRCUIT




With the ignition off.
Disconnect the Controller Antilock Brake (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 100k ohms?

Yes

- Repair the 5-Volt Supply circuit for a short to ground.
- Perform ABS VERIFICATION TEST. ABS Verification Test

No

- Go to 3

3. MEASURE THE RESISTANCE BETWEEN THE SENSOR GROUND CIRCUIT AND THE YAW RATE/ACCELERATION SENSOR 5-VOLT SUPPLY CIRCUIT




With the ignition off.
Measure the resistance between the 5-Volt Supply circuit and Sensor Ground circuit at the Yaw Rate/Acceleration Sensor harness connector.
Is the resistance below 100k ohms?

Yes

- Repair the 5-Volt Supply circuit for a short to the Sensor Ground circuit.
- Perform ABS VERIFICATION TEST. ABS Verification Test

No

- Go to 4

4. MEASURE THE RESISTANCE OF THE YAW RATE/ACCELERATION SENSOR 5-VOLT SUPPLY CIRCUIT




With the ignition off.
Measure the resistance of the 5-Volt Supply circuit from the Yaw Rate/Acceleration Sensor harness connector to the CAB harness connector.
Is the resistance below 5.0 ohms?

Yes

- Replace the Controller Antilock Brake (CAB) Module. Removal.
- Perform ABS VERIFICATION TEST. ABS Verification Test

No

- Repair the Yaw Rate/Acceleration Sensor 5-Volt Supply circuit for an open.
- Perform ABS VERIFICATION TEST. ABS Verification Test