B0528
DTC B0527, B0528, or B0529
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis Strategy Based Diagnosis for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions Diagnostic Procedure Instructions provides an overview of each diagnostic category.
DTC Descriptors
DTC B0527 00
- Right Turn Signal Circuit Low
DTC B0528 00
- Right Turn Signal Circuit High
DTC B0529 00
- Right Turn Signal Circuit Open
Diagnostic Fault Information
Circuit/System Description
Ground is applied at all times to the turn signal/multifunction switch. The turn signal lamps may only be activated with the ignition switch in the ON or START position. When the turn signal/multifunction switch is placed in either the TURN RIGHT or TURN LEFT position, ground is applied to the body control module (BCM) through either the right turn or left turn signal switch signal circuit. The BCM then applies a pulsating voltage to the front and rear turn signal lamps through there respective voltage supply circuits. When a turn signal request is received by the BCM, a serial data message is sent to the instrument panel cluster (IPC) requesting the respective turn signal indicator be pulsed ON and OFF.
Conditions for Running the DTC
The battery voltage must be between 9-16 V.
Conditions for Setting the DTC
B0527
The BCM receives a right turn signal command and the right front or rear turn lamp control circuit is shorted to ground.
B0528
The BCM receives a right turn signal command and the right front or rear turn lamp control circuit is shorted to voltage.
B0529
The BCM receives a right turn signal command and the right front or rear turn lamp control circuit is open.
Action Taken When the DTC Sets
The right front and/or right rear turn signals will not operate or will remain always on.
Conditions for Clearing the DTC
* This DTC will clear on current status after the condition for setting the fault is corrected.
* A history DTC will clear after 100 consecutive ignition cycles without a fault present.
Reference Information
Schematic Reference
Exterior Lights Schematics Exterior Lights Schematics
Connector End View Reference
Component Connector End Views Connector End Views By Name
Description and Operation
Exterior Lighting Systems Description and Operation Exterior Lighting Systems
Electrical Information Reference
* Circuit Testing Circuit Testing
* Connector Repairs Connector Repairs
* Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections
* Wiring Repairs Wiring Repairs
Scan Tool Reference
Control Module References Control Module References for scan tool information
Circuit/System Testing
1. Ignition OFF, disconnect the harness connector at the appropriate right turn signal lamp.
2. Verify a test lamp illuminates between the ground circuit terminal G and B+.
• If the test lamp does not illuminate test the ground circuit for an open/high resistance.
3. Connect a test lamp between the control circuit terminal A and the ground circuit terminal G.
4. Ignition ON, command the appropriate Right Turn Signal Lamp ON and OFF with a scan tool. The test lamp should turn ON and OFF when changing between the commanded states.
• If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the BCM.
• If the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the BCM.
5. If all circuits test normal, replace the turn signal lamp.
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the diagnostic procedure.
* Headlamp Replacement Removal and Replacement
* Headlamp Bulb Replacement Service and Repair
* Park/Turn Signal/Side Marker Lamp Bulb Replacement Service and Repair
* Tail Lamp Replacement Service and Repair
* Tail Lamp Bulb Replacement Service and Repair
* Control Module References Control Module References for BCM replacement, setup, and programming