2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 606
* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit
Testing/Circuit Testing)
* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic
Procedures/Connector Repairs/Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General
Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring
Repairs/Wiring Repairs)
Scan Tool Reference
Control Module References (See: Testing and Inspection/Programming and Relearning)for scan tool information
Circuit/System Verification
Ignition ON, observe the scan tool BCM 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.
Circuit/System Testing
1. Ignition OFF, disconnect the harness connector at the B55 hood ajar switch.
2. Ignition OFF, test for less than 5 ohm between the ground circuit terminal C and ground.
瀚慖f greater than the specified range, test the ground circuit for an open/high resistance.
3. Ignition ON, verify DTC B3006 04 is set as current.
瀚慖f DTC B3006 01 is set as current, test the signal circuit for a short to voltage. If the circuit tests normal, replace the K9 BCM.
瀚慖f DTC B3006 02 is set as current, test the signal circuit for a short to ground. If the circuit tests normal, replace the K9 BCM.
4. Install a 5 A fused jumper wire between the signal circuit terminal B and ground. Verify DTC B3006 02 is set as current.
瀚慖f DTC B3006 04 is set as current, test the signal circuit for 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 (See: Verification Tests) after completing the diagnostic procedure.
* Hood Primary and Secondary Latch Replacement
* Control Module References (See: Testing and Inspection/Programming and Relearning)for BCM replacement, programming and setup
B3031
DTC B3031
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure
Instructions)provides an overview of each diagnostic category.
DTC Descriptor
DTC B3031 00
- Security Controller In Learn Mode Malfunction
Circuit/System Description
When learning a coded key, the body control module (BCM) is placed in learn mode. DTC B3031 will set automatically as an indicator that the
system is in learn mode and not as a fault indicator. Once the coded key is learned, learn mode will be exited and the DTC cleared. If the BCM does
not exit learn mode, B3031 will remain current and indicate a fault. The instrument cluster security indicator will illuminate and the driver
information center will display a message.
