Vehicle Access
DTC B3006
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 Instructionsprovides an overview of each diagnostic category.
DTC Descriptors
DTC B3006 01
- Hood Ajar Circuit Short to Battery
DTC B3006 02
- Hood Ajar Circuit Short to Ground
DTC B3006 04
- Hood Ajar Circuit Open Circuit
Diagnostic Fault Information
Circuit/System Description
When the ignition is ON, the body control module (BCM) supplies a voltage signal to the hood ajar switch through the hood ajar switch signal circuit. When the hood is opened, the signal circuit is connected to ground through the hood ajar switch ground circuit and the voltage is pulled low within the BCM. In response, the BCM sends a serial data message to the driver information center in the instrument panel cluster to display the Hood Open message.
Conditions for Running the DTC
Battery voltage must be between 9-16 V.
Conditions for Setting the DTC
B3006 01
The BCM detects a short to voltage in the hood ajar signal circuit
B3006 02
The BCM detects a short to ground in the hood ajar signal circuit.
B3006 04
The BCM detects an open/high resistance in the hood ajar signal circuit.
Action Taken When the DTC Sets
B3006 02
The Hood Open message will be continuously displayed on the driver information center
B3006 01 or B3006 04
The Hood Open message will be inoperative.
Conditions for Clearing the DTC
* The DTC will be current for as long as the fault is present.
* When the fault is no longer present, the DTC will become a history DTC.
* A history DTC will clear after 50 ignition cycles
Reference Information
Schematic Reference
Release Systems Schematics
Connector End View Reference
Component Connector End Views Hybrid/EV Battery Pack X1 A4
Description and Operation
Hood Ajar Indicator Description and Operation Description and Operation
Electrical Information Reference
* 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 Control Module Referencesfor scan tool information
Circuit/System Verification
Ignition ON, observe the scan tool BCM Hood Position Switch parameter while opening and closing the hood, the parameter should change between Open and Closed.
Circuit/System Testing
1. Ignition OFF, disconnect the harness connector at the B55 hood ajar switch.
2. Test for less than 30 ohm between the ground circuit terminal C and ground.
• If greater than the specified range, test the ground circuit for an open/high resistance.
3. Ignition ON, verify the scan tool BCM Hood Position Switch parameter is Closed.
• If not the specified value, test the signal circuit terminal A for a short to ground. If the circuit tests normal, replace the K9 BCM.
4. Install a 3 A fused jumper between the signal circuit terminal A and the ground circuit terminal C. Verify the scan tool Hood Position Switch parameter is Open.
• If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the K9 BCM.
5. If all circuits test normal, test or replace the B55 hood ajar switch.
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the diagnostic procedure.
* Hood Primary and Secondary Latch Replacement Service and Repair
* Control Module References Control Module Referencesfor BCM replacement, programming and setup