Chevrolet Trax: DTC B2570
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 Descriptor
DTC B2570 02
Rear Compartment Courtesy Lamp Control Circuit Short to Ground
Diagnostic Fault Information
Circuit/System Description
The body control module (BCM) applies battery voltage to the rear compartment
courtesy lamp through the rear
compartment lamp control circuit. When the BCM receives a rear compartment lid
open input from the rear
compartment lid latch, the BCM applies battery voltage to the rear compartment
lamp control circuit
illuminating the rear compartment courtesy lamp. In the event that the rear
compartment lamp were to remain
illuminated for more than 10 minutes with the ignition switch in the OFF
position and no doors opened, the
BCM will deactivate the rear compartment lamp control circuit to prevent total
battery discharge.
Conditions for Running the DTC
- Battery voltage must be between 9-16 V.
- Rear compartment OPEN.
Conditions for Setting the DTC
The BCM detects a short to ground on the rear compartment courtesy lamp
control circuit.
Actions Taken When the DTC Sets
The rear compartment lamp is inoperative.
Conditions for Clearing the DTC
- The condition responsible for setting the DTC no longer exists.
- A history DTC will clear once 100 consecutive malfunction-free ignition
cycles have occurred.
Reference Information
Schematic Reference
Interior Lights Schematics (Encore) , Interior Lights Schematics (Trax)
Connector End View Reference
WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS -
INDEX - ENCORE WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT
CONNECTOR END VIEWS - INDEX - TRAX
Description and Operation
Interior Lighting Systems Description and Operation
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 Testing
- Ignition OFF, exterior lamps OFF, rear hatch latch latched, disconnect
the harness connector at the E8S
Rear Compartment Courtesy Lamp.
- Test for less than 5 ohms between the ground circuit terminal 2 and
ground.
- Ignition OFF.
- 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 5 ohms
- Connect a test lamp between the control circuit terminal 1 and ground,
ignition ON.
- Verify the test lamp turns ON and OFF when commanding the Cargo Lamp ON
and OFF with a scan
tool.
- If the test lamp is always OFF
- Ignition OFF, disconnect the X7 harness connector at the K9 Body Control
Module.
- Test for infinite resistance between the control circuit and ground.
- If less than infinite resistance, repair the short to ground on the
circuit.
- If infinite resistance
- Test for less than 2 ohms in the control 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 the test lamp is always ON
- Ignition OFF, disconnect the X7 harness connector at the K9 Body Control
Module, ignition ON.
- Test for less than 1 V between the control circuit terminal and ground.
- If 1 V or greater, repair the short to voltage on the circuit.
- If less than 1 V, replace the K9 Body Control Module.
- If the test lamp turns ON and OFF
- Test or replace the E8S Rear Compartment Courtesy Lamp.
Repair Instructions
Perform the Diagnostic Repair Verification after completing the repair.
- Cargo Lamp Replacement
- Cargo Center Courtesy Lamp Bulb Replacement
- Control Module References for BCM replacement, programming, and setup
READ NEXT:
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.
Diag
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.
Diag
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.
Diag
SEE MORE:
NOTE: The following steps must be completed before using the
symptom tables.
Perform the Brake System Vehicle Road Test before using the hydraulic
brake symptom tables in order
to duplicate the customers concern.
Review the system operation in order to familiarize yourself with the
system f
NOTE:
DO NOT program a control module unless directed to by a service
procedure or a service bulletin. If the ECU is not properly configured with
the correct calibration software, the ECU will not control all of the
vehicle
features properly.
Ensure the programming tool is equipped with the