PRE-RELEASE
DTC B2580
| DTC B2580 |
| Diagnostic Instructions |
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Perform the
Diagnostic System Check - Vehicle
prior to using this diagnostic procedure.
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Review
Strategy Based Diagnosis
for an overview of the diagnostic approach.
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Diagnostic Procedure Instructions
has overviews of all diagnostic categories.
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| DTC Descriptor |
DTC B2580 01
High Beam Control Circuit Short to Battery
| Diagnostic Fault Information |
| Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
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High Beam Control
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1
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1
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B2580 01
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1. High beam lamps inoperative
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| Circuit/System Description |
The headlamp high beam relay is supplied with battery voltage at all times. The turn signal/multifunction switch signal circuit is grounded by pressing the turn signal/multifunction switch. The body control module (BCM) energizes the headlamp high beam relay by applying ground to the headlamp high beam relay control circuit. When the headlamp high beam relay is energized, the relay switch contacts close and battery voltage is applied through the high beam lamp fuses to the high beam lamp supply voltage circuit which illuminates the high beam lamps.
| Conditions for Running the DTC |
High beam lamps ON
| Conditions for Setting the DTC |
The BCM detects a short to voltage on the control circuit.
| Action Taken When the DTC Sets |
The high beam lamps are inoperative.
| Conditions for Clearing the DTC |
The condition for setting the DTC is no longer present.
| Reference Information |
Schematic Reference
Exterior Lights Schematics
Connector End View Reference
Component Connector End Views
Description and Operation
Exterior Lighting Systems Description and Operation
Electrical Information Reference
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Circuit Testing
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Connector Repairs
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Testing for Intermittent Conditions and Poor Connections
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Wiring Repairs
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Scan Tool Reference
Control Module References for information on diagnostic tools
| Circuit/System Verification |
Ignition ON, perform the High Beams test. The high beam lamps should be ON/OFF when changing between the commanded states.
| Circuit/System Testing |
| 1. |
Ignition OFF, disconnect the K9 Body Control Module.
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| 2. |
Verify that a test lamp illuminates between the control circuit terminal 18 X5 and ground.
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| 3. |
If the test lamp is OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the X50A Fuse Block - Underhood.
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If all circuits test normal, replace the K9 Body Control Module.
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| Repair Instructions |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
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Front Compartment Fuse Block Housing Replacement
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Control Module References
for information on BCM replacement, setup, and programming
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