PRE-RELEASE
DTC B3883
| DTC B3883 |
| 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 Descriptors |
DTC B3883 02
License Plate Lamp Circuit Short to Ground
DTC B3883 04
License Plate Lamp Circuit Open
| Diagnostic Fault Information |
| Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
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License Plate Lamp Control
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B3883 02
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B3883 04
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1
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1. License plate lamps always ON
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| Circuit/System Description |
The headlamp switch is supplied with ground at all times. When the headlamp switch is placed in either the park or low beam position, ground is applied to the license plate lamp signal circuit to the body control module (BCM). The BCM responds by applying battery voltage to the license plate lamp control circuit. This energizes the left and right license lamp.
| Conditions for Running the DTC |
Headlamp switch in park or low beam position.
| Conditions for Setting the DTC |
B3883 02
The BCM detects a short to ground on the control circuit.B3883 04
The BCM detects an open control circuit.| Action Taken When the DTC Sets |
The appropriate license plate lamp is 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 License Plate Lamps test. The license plate lamps should be ON/OFF.
| Circuit/System Testing |
| 1. |
Ignition OFF, remove the appropriate E7 License Plate Lamp bulb and inspect.
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| 2. |
If bulb is faulty, replace bulb.
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| 3. |
Disconnect the harness connector at E7 License Plate Lamp.
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| 4. |
Test for less than 5 Ω between the license plate lamp ground circuit harness connector terminal 1 and ground.
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If greater than the specified range, test the ground circuit for an open/high resistance.
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Connect a test lamp between the control circuit harness connector terminal 3 and ground.
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| 7. |
Command the License Plate Lamps test with a scan tool. The test lamp should turn ON and OFF when changing between the commanded states.
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| 8. |
If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the K9 Body Control Module.
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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 K9 Body Control Module.
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| Repair Instructions |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
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Rear License Plate Lamp Replacement
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Control Module References
for information on BCM replacement, setup, and programming
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