B3006
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 Instructions provides 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
Diagnostic Fault Information
Circuit/System Description
The body control module (BCM) applies B+ to the hood ajar signal circuit and monitors the voltage to determine the position of the hood. When the hood is closed, the switch is open and voltage remains high. When the hood is open, the switch is closed and the voltage is pulled low.
Conditions for Running the DTC
The BCM continuously monitors for this DTC
Conditions for Setting the DTC
B3006 01
The BCM detects that the hood ajar switch signal circuit is shorted to battery.
B3006 02
The BCM detects that the hood ajar switch signal circuit is shorted to ground.
B3006 04
The BCM detects that the hood ajar switch signal circuit is open.
Action Taken When the DTC Sets
* The hood ajar switch input will be ignored as a content theft deterrent trigger.
* Remote vehicle start will be disabled.
Conditions for Clearing the DTC
* A current DTC will clear when the conditions for setting the DTC are no longer present.
* A history DTC will clear after 40 malfunction free ignition cycles.
Reference Information
Schematic Reference
Immobilizer Schematics Immobilizer Schematics
Connector End View Reference
Component Connector End Views Sunshade - Left (DH6)
Description and Operation
Keyless Entry System Description and Operation (With ATS) Keyless Entry System Description and Operation (With ATS)Keyless Entry System Description and Operation (Without ATS) Keyless Entry System Description and Operation (Without ATS)
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 Control Module References for scan tool information
Circuit/System Verification
1. Ignition ON.
2. Observe the scan tool Hood Ajar Switch parameter. With the hood open, the Hood Ajar Switch parameter should be Open. With the hood closed, the Hood Ajar Switch parameter should be Closed.
• If the parameter does not change
Refer to Circuit/System Testing.
• If the parameter changes
3. All OK.
Circuit/System Testing
1. Ignition OFF and all vehicle systems OFF, disconnect the harness connector at the B55 hood ajar switch. It may take up to 2 minutes for all vehicle systems to power down.
2. Test for less than 10 ohms between the ground circuit terminal C and ground.
• If 10 ohms or greater
1. Ignition OFF
2. Test for less than 2 ohms in the ground circuit end to end.
• If 2 ohms or greater, repair the open/high resistance in the circuit.
• If less than 2 ohms, repair the open/high resistance in the ground connection.
• If less than 10 ohms
3. Ignition ON.
4. Test for greater than 11.5 V between the signal circuit terminal B and ground.
• If 11.5 V or less
1. Ignition OFF, disconnect the harness connector at the K9 body control module.
2. Test for infinite resistance between the signal circuit and ground.
• If less than infinite resistance, repair the short to ground on the circuit.
• If Infinite resistance.
3. Test for less than 2 ohms in the signal circuit end to end.
• If 2 ohms or greater, repair the open/high resistance in the circuit.
• If less than 2 ohms, replace the K9 body control module.
• If greater than 11.5 V
5. Ignition OFF, disconnect the X4 and X7 harness connector at the K9 body control module. Ignition ON.
6. Test for less than 1 V between the signal circuit terminal B and ground.
• If 1 V or greater
Repair the short to voltage on the circuit.
• If less than 1 V
7. Test or replace the B55 hood ajar switch.
Component Testing
1. Ignition OFF, disconnect the harness connector at the B55 hood ajar switch.
2. Test for 2738-3350 ohms between the signal terminal A and the signal terminal B with the hood latch in the CLOSED position.
• If not between 2738-3350 ohms
Replace the B55 hood ajar switch.
• If between 2738-3350 ohms
3. Test for 658-806 ohms between the signal terminal A and the ground terminal C with the hood latch in the CLOSED position.
• If not between 658-806 ohms
Replace the B55 hood ajar switch.
• If between 658-806 ohms
4. Test for 2080-2545 ohms between the signal terminal B and the ground terminal C with the hood latch in the CLOSED position.
• If not between 2080-2545 ohms
Replace the B55 hood ajar switch.
• If between 2080-2545 ohms
5. Test for 2738-3350 ohms between the signal terminal A and the signal terminal B with the hood latch in the OPEN position.
• If not between 2738-3350 ohms
Replace the B55 hood ajar switch.
• If between 2738-3350 ohms
6. Test for 2080-2545 ohms between the signal terminal A and the ground terminal C with the hood latch in the OPEN position.
• If not between 2080-2545 ohms
Replace the B55 hood ajar switch.
• If between 2080-2545 ohms
7. Test for 658-806 ohms between the signal terminal B and the ground terminal C with the hood latch in the OPEN position.
• If not between 658-806 ohms
Replace the B55 hood ajar switch.
• If between 658-806 ohms
8. All OK.
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 References for BCM replacement, programming and setup