Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

The body control module (BCM) monitors the voltage input of the hood open switch signal circuit and the hood open closed switch signal circuit. During proper operation, the 2 separate voltage signals at the BCM should never be the same voltage with the hood opened or closed. If the 2 voltage signals should have the same voltage value DTC B3006 will set.

When the hood ajar switch state changes

If both the hood open switch signal circuit and the hood closed switch signal circuit are simultaneously in an active or inactive state

The DTC will clear when conditions for setting the DTC are no longer present.

Schematic Reference

Keyless Entry Schematics

Connector End View Reference

Keyless Entry Connector End Views

Description and Operation

Content Theft Deterrent (CTD) Description and Operation

Keyless Entry System Description and Operation

Electrical Information Reference

Ignition ON, observe the scan tool Hood Open Switch and Hood Closed Switch parameters. With the hood open, the Hood Open Switch parameter should read Active and the Hood Closed Switch parameter should read Inactive. With the hood closed, the Hood Open Switch parameter should read Inactive and the Hood Closed Switch parameter should read Active.

1. Ignition OFF, disconnect the harness connector at the hood ajar switch.
2. Ignition OFF, test for less than 1 ohm of resistance between the ground circuit terminal and ground.

⇒	If greater than the specified value, test the ground circuit for an open/high resistance.

3. Ignition ON, verify the scan tool Hood Closed Switch and Hood Open Switch parameters are Inactive.

⇒	If not the specified value, test the applicable signal circuit for a short to ground. If the circuit tests normal, replace the BCM.

4. Install a 3-amp fused jumper wire between the hood open switch signal circuit terminal and ground. Verify the scan tool Hood Open Switch parameter is Active.

⇒	If not the specified value, test the signal circuit for a short to voltage or and open/high resistance. If the circuit tests normal, replace the BCM.

5. Install a 3-amp fused jumper wire between the hood closed switch signal circuit terminal and ground. Verify the scan tool Hood Closed Switch parameter is Active.

⇒	If not the specified value, test the signal circuit for a short to voltage or and open/high resistance. If the circuit tests normal, replace the BCM.

6. If all circuits test normal, test or replace the hood ajar switch.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for BCM replacement, programming and setup