Service Information

Volt

DTC B3006

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

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	Short to Ground	Open/High Resistance	Short to Voltage	Signal Performance
Signal	B3006 02	B3006 04	B3006 01	-
Ground	-	B3006 04	-	-

The body control module (BCM) applies B+ to the bonnet ajar signal circuit and monitors the voltage to determine the position of the bonnet. The bonnet ajar switch contains a multiplexed resistor. This resistor will vary the voltage seen by the BCM by pulling down the applied voltage based on the position of the switch.

Conditions for Running the DTC

The BCM continuously monitors for this DTC

Conditions for Setting the DTC

B3006 01

The BCM detects that the bonnet ajar switch signal circuit is shorted to battery.

B3006 02

The BCM detects that the bonnet ajar switch signal circuit is shorted to ground.

B3006 04

The BCM detects that the bonnet ajar switch signal circuit is open.

Action Taken When the DTC Sets

•	The bonnet 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

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 Verification

Vehicle in Service Mode.
Observe the scan tool Bonnet Ajar Switch parameter. With the bonnet open, the Bonnet Ajar Switch parameter should be Open. With the bonnet closed, the Bonnet Ajar Switch parameter should be Closed.

⇒	*If the parameter does not change*

Refer to Circuit/System Testing.

⇓	*If the parameter changes*

All OK.

Circuit/System Testing

Vehicle OFF and all vehicle systems OFF, disconnect the harness connector at the B55 bonnet ajar switch. It may take up to 2 minutes for all vehicle systems to power down.
Test for less than 10 Ω between the ground circuit terminal C and ground.

⇒	*If 10 Ω or greater*

2.1.	Vehicle OFF

2.2.	Test for less than 2 Ω in the ground circuit end to end.

⇒	If 2 Ω or greater, repair the open/high resistance in the circuit.

⇒	If less than 2 Ω, repair the open/high resistance in the ground connection.

⇓	*If less than 10 Ω*

Vehicle in Service Mode.
Test for B+ between the signal circuit terminal B and ground.

⇒	*If less than B+*

4.1.	Vehicle OFF, disconnect the harness connector at the BCM.

4.2.	Test for infinite resistance between the B+ circuit and ground.

⇒	If less than infinite resistance, repair the short to ground on the circuit.

⇓	If Infinite resistance.

4.3.	Test for less than 2 Ω in the B+ circuit end to end.

⇒	If 2 Ω or greater, repair the open/high resistance in the circuit.

⇒	If less than 2 Ω, replace the BCM.

⇓	*If B+*

Vehicle OFF, disconnect the X4 and X7 harness connector at the K9 BCM. Vehicle in Service Mode.
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*

Test or replace the B55 bonnet ajar switch.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

•	Bonnet Primary and Secondary Catch Replacement : Volt → Ampera

•	Control Module References for BCM replacement, programming and setup