B009C
DTC B009C
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (Diagnostic System Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Strategy Based Diagnosis) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Diagnostic Procedure Instructions) provides an overview of each diagnostic category.
DTC Descriptors
B009C 01
- Pedestrian Impact Detection Discrimination Sensor Short to Battery
B009C 02
- Pedestrian Impact Detection Discrimination Sensor Short to Ground
B009C 08
- Pedestrian Impact Detection Discrimination Sensor Signal Invalid/Open Circuit
B009C 39
- Pedestrian Impact Detection Discrimination Sensor Internal Electronic Failure
B009C 3A
- Pedestrian Impact Detection Discrimination Sensor Incorrect Component Installed
Diagnostic Fault Information
Circuit/System Description
The pedestrian impact detection system senses and discriminates vehicle impacts and deploys the pedestrian hood hinge actuators in a timely manner to protect vulnerable pedestrians. The discrimination sensor provides discrete force information to the pedestrian impact detection module. The pedestrian impact detection module uses vehicle acceleration information from the safing sensor and force information from the discrimination sensor to determine those events when the deployment of the hood hinge actuator is expected. The pedestrian impact detection module provides a two wire current loop interface to the discrimination sensor. The pedestrian impact detection module also provides power and ground to the discrimination sensor over two separate discrete circuits. The pedestrian impact detection module monitors the discrimination sensor for any system malfunction and when a malfunction is detected, a DTC will be stored in non volatile memory.
Conditions for Running the DTC
Ignition voltage is between 9-16 volts.
Conditions for Setting the DTC
B009C 01
The discrimination sensor voltage is greater than 3.2 V and the discrimination sensor voltage is not supplied by the pedestrian impact detection module.
B009C 02
The discrimination sensor voltage is less than 3.5 V and the discrimination sensor voltage is supplied by the pedestrian impact detection module.
B009C 08
The discrimination sensor high and/or low circuit is open or no new data received. An open circuit indicates as no new data received.
B009C 39
The discrimination sensor sends an error message or invalid data to the pedestrian impact detection module.
B009C 3A
Invalid discrimination sensor ID data received by the pedestrian impact detection module
Action Taken When the DTC Sets
* The pedestrian impact detection module commands the DIC to display Service Pedestrian Protection System.
* The pedestrian impact detection module stores DTC in memory.
Conditions for Clearing the DTC
* The condition responsible for setting the DTC no longer exists.
* A history DTC will clear once 40 malfunction-free ignition cycles have occurred.
Reference Information
Schematic Reference
Object Detection Schematics ([1][2]Collision Avoidance and Parking Assist Systems)
Connector End View Reference
Component Connector End Views (Connector Views)
Description and Operation
Object Detection Description and Operation (UD7 with Display) (Object Detection Description and Operation (UD7 with Display))Object Detection Description and Operation (UD7 Audio Only) (Object Detection Description and Operation (UD7 Audio Only))Object Detection Description and Operation (B3T) (Object Detection Description and Operation (B3T))Object Detection Description and Operation (UVC) (Object Detection Description and Operation (UVC))
Electrical Information Reference
* Circuit Testing (Circuit Testing)
* Connector Repairs (Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (Wiring Repairs)
Scan Tool Reference
Control Module References (Programming and Relearning) for scan tool information
Circuit/System Testing
1. Ignition OFF, disconnect the harness connector at the front upper beam pedestrian impact detection sensor.
2. Ignition OFF, test for less than 5 ohms between the sensor ground circuit terminal 3 and ground.
• If greater than the specified value, test the circuit for a short to voltage and an open/high resistance. If the circuit tests normal, replace the pedestrian impact detection module.
3. Ignition ON, verify a test lamp illuminates between the sensor supply voltage circuit terminal 4 and ground.
• If the test lamp does not illuminate, test the circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the pedestrian impact detection module.
4. Ignition OFF, disconnect the harness connector at the pedestrian impact detection module.
5. Test for infinite resistance between the sensor signal circuit terminal 2 and ground.
• If less than infinite resistance, test the circuit for a short to ground.
6. Ignition ON, test for less than 1 volt between the sensor signal circuit terminal 2 and ground.
• If greater than the specified value, test the circuit for a short to voltage.
7. Ignition ON, test for less than 1 volt between the sensor low reference circuit terminal 1 and ground.
• If greater than the specified value, test the circuit for a short to voltage.
8. Test for less than 1 ohm between the sensor low reference circuit terminal 1 and the pedestrian impact detection module terminal 40.
• If greater than the specified value, test the circuit for an open/high resistance.
9. Test for less than 1 ohm between the sensor signal circuit terminal 2 and the pedestrian impact detection module terminal 39.
• If greater than the specified value, test the circuit for an open/high resistance.
10. If all circuits test normal, replace the front upper beam pedestrian impact detection sensor.
11. With a scan tool, clear DTCs.
12. Verify DTC B009C is not set.
• If DTC is set, replace the pedestrian impact detection module.
Repair Instructions
Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.
* Pedestrian Impact Detection Sensor Replacement - Front Upper Beam (Pedestrian Impact Detection Sensor Replacement - Front Upper Beam)
* Control Module References (Programming and Relearning) for pedestrian impact detection module replacement, setup, and programming