2010 Cadillac CTS Sedan AWD V6-3.6L Page 73
Testing/Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/Wiring Repairs/Wiring Repairs)
Scan Tool Reference
Control Module References (See: Testing and Inspection/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.
瀚慖f 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.
瀚慖f 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.
瀚慖f 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.
瀚慖f 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.
瀚慖f 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.
瀚慖f 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.
瀚慖f 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.
瀚慖f DTC is set, replace the pedestrian impact detection module.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Pedestrian Impact Detection Sensor Replacement - Front Upper Beam (See: Accessories and Optional Equipment/Collision Avoidance and
Parking Assist Systems/Collision Avoidance Sensor/Service and Repair/Pedestrian Impact Detection Sensor Replacement - Front Upper
Beam)
* Control Module References (See: Testing and Inspection/Programming and Relearning) for pedestrian impact detection module
replacement, setup, and programming
B009D
DTC B009D
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure
Instructions) provides an overview of each diagnostic category.
