GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 2009 🢒 CTS 🢒 Safety and Security 🢒 Supplemental Inflatable Restraints 🢒 DTC B009A

Diagnostic Instructions
    • Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
    • Review Strategy Based Diagnosis for an overview of the diagnostic approach.
    •  Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

B009A 01 : Left Active Hood Hinge Actuator Deployment Loop Short to Battery

B009A 02 : Left Active Hood Hinge Actuator Deployment Loop Short to Ground

B009A 04 : Left Active Hood Hinge Actuator Deployment Loop Open

B009A 0D : Left Active Hood Hinge Actuator Deployment Loop Above Threshold

B009A 0E : Left Active Hood Hinge Actuator Deployment Loop Below Threshold

Diagnostic Fault Information

Circuit

Short to Ground

High Resistance

Open

Short to Voltage

Signal Performance

Left Hood Hinge - Low Control Circuit

B009A 02

B009A 04

B009A 0D

B009A 01

B009A 0E

Left Hood Hinge - High Control Circuit

B009A 02

B009A 04

B009A 0D

B009A 01

B009A 0E

Circuit/System Description

The pedestrian hood actuators deploy only when a valid signal whose energy is capable of triggering deployment of the hood is present. The pedestrian hood actuators only deploys in those events where the activation of the hood is expected. The hood actuator is not expected to deploy in low severity event where the risk of injury is low or in a high severity event like a car to car crash. During a frontal pedestrian impact of sufficient force the PIDS module will allow current to flow through the deployment loop in order to deploy the hood hinge actuator. The pedestrain impact module performs continuous diagnostic tests on the deployment loops to check for proper circuit continuity, shorts to ground and shorts voltage. There are 2 shorting bars used within the hood hinge actuator connector which will short together both high and low control circuits, when the hood hinge connector is disconnected. This helps to prevent unwanted deployment of the actuator during servicing.

Conditions for Running the DTC

Ignition voltage is between 9-16 volts.

Conditions for Setting the DTC

B009A 01

The pedestrian impact detection module deployment loop resistance leakage is less than 3.5 kohms for 2.5 seconds.

B009A 02

The pedestrian impact detection module deployment loop resistance leakage is less than 3.5 kohms for 2.5 seconds.

B009A 04

The pedestrian impact detection module deployment loop resistance is greater than 7.2 ohms for 2.5 seconds.

B009A 0D

The pedestrian impact detection module deployment loop resistance is greater than 3.1 ohms for 2.5 seconds.

B009A 0E

The pedestrian impact detection module deployment loop resistance is less than 1.6 ohms for 2.5 seconds.

Action Taken When the DTC Sets
    • The PIDS module commands the DIC to display the message 'Service Pedestrian Protection System'.
    • The PIDs 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

Connector End View Reference

Component Connector End Views

Description and Operation

Object Detection Description and Operation

Electrical Information Reference

    •  Circuit Testing
    •  Connector Repairs
    •  Testing for Intermittent Conditions and Poor Connections
    •  Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information.

Circuit/System Testing
  1. Ignition OFF, disconnect the harness connector at the left hood hinge actuator.
  2. Ignition ON, test for less than 1 volt between the high control circuit terminal A and ground.
    3. ⇒If greater than the specified range, test the circuit for a short to voltage. If the circuit tests normal, replace the PIDS module.
  3. Test for less than 1 volt between the low control circuit terminal B and ground.
    4. ⇒If greater than the specified range, test the circuit for a short to voltage. If the circuit tests normal, replace the PIDS module.
  4. Ignition OFF, test for infinite resistance between the high control circuit terminal A and ground.
    5. ⇒If not the specified value, test the circuit for a short to ground. If the circuit tests normal, replace the PIDS module.
  5. Test for infinite resistance between the low control circuit terminal B and ground.
    6. ⇒If not the specified value, test the circuit for a short to ground. If the circuit tests normal, replace the PIDS module.
  6. Test for less then 1 ohm of resistance between the high control circuit terminal A and ground.
    7. ⇒If not within the specified range, test the circuit for an open/high resistance.
  7. Test for less then 1 ohm of resistance between the low control circuit terminal B and ground.
    8. ⇒If not within the specified range, test the circuit for an open/high resistance.
  8. If all circuits test normal, replace the hood hinge actuator.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

    •  Active Hood Hinge Actuator Replacement
    •  Control Module References for PIDS module replacement, setup, and programming