2010 Cadillac Truck SRX AWD V6-3.0L Page 316
and current flow of the control circuit.
Conditions for Running the DTC
* The ignition switch is in the ON position.
* The brake pedal is pressed.
* The transmission is in the PARK position.
* The DTC runs continuously once the above conditions are met.
Conditions for Setting the DTC
B270A 01
The body control module detects a short to voltage in the automatic transmission park lock control solenoid control circuit for 1 second.
B270A 02
The body control module detects a short to ground in the automatic transmission park lock control solenoid control circuit for 1 second.
B270A 04
The body control module detects an open in the automatic transmission park lock control solenoid control circuit for 1 second.
Action Taken When the DTC Sets
The body control module will not attempt to enable the voltage supply circuit of the automatic transmission park lock control solenoid until the next
key cycle.
Conditions for Clearing the DTC
* A current DTC B270A will clear when the malfunction is no longer present and the ignition switch is cycled.
* A history DTC will clear after 100 ignition cycles with no current DTC active during the 100 ignition cycles.
Reference Information
Schematic Reference
Shift Lock Control Schematics (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Shift Interlock/Diagrams/Electrical
Diagrams)
Connector End View Reference
Component Connector End Views (See: Diagrams/Connector Views/Connector End Views By Name)
Description and Operation
Automatic Transmission Shift Lock Control Description and Operation (See: Transmission and Drivetrain/Automatic
Transmission/Transaxle/Shift Interlock/Description and Operation)
Electrical Information Reference
* 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
1. Ignition ON, observe the scan tool Brake Applied Output Signal parameter while pressing and releasing the brake pedal. The parameter
should change from ON to OFF when the brake pedal is depressed.
瀚慖f the parameter does not change, refer to Stop Lamps Malfunction (See: Lighting and Horns/Testing and Inspection/Symptom Related
Diagnostic Procedures/Stop Lamps Malfunction).
2. While pressing the brake pedal, the vehicle operator should be able to move the shifter lever out of the park position.
