DTC B2585 or B3867
| DTC B2585 or B3867 |
| 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
provides an overview of each diagnostic category.
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| DTC Descriptors |
DTC B2585 02
Park Lamps Control Circuit Short to Ground
DTC B3867 02
Right Park Lamp Control Circuit Short to Ground
| Diagnostic Fault Information |
| Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
| Park Lamps Control | B2585 02 | 2 | 1 | - |
| Right Park Lamps Control | B3867 02 | 2 | 1 | - |
| 1.Park Lamps Always ON 2. Park Lamps Always OFF | ||||
| Circuit/System Description |
The body control module (BCM) energizes the park lamps by applying voltage to the park lamp control circuit. When the park lamp control circuit is energized, the park lamps are illuminated.
| Conditions for Running the DTC |
Headlamp switch in park or low beam position.
| Conditions for Setting the DTC |
B2585 02
The BCM detects a short to ground on the left side park lamp control circuit.B3867 02
The BCM detects a short to ground on the right side park lamp control circuit.| Action Taken When the DTC Sets |
The appropriate park lamps will be inoperative
| Conditions for Clearing the DTC |
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The DTC will be current for as long as the fault is present.
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When the fault is no longer present, the DTC will be a history DTC.
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A history DTC will clear after 50 ignition cycles.
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| 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 scan tool information
| Circuit/System Verification |
| 1. |
Ignition ON, observe the function of the E2LF side marker lamp-left front, E5E tail lamp-left rear and the E4J park lamp-left front while commanding the Left Park Lamps ON and OFF with a scan tool. The E2LF side marker lamp-left front, E5E tail lamp-left rear and the E4J park lamp-left front should turn ON and OFF while changing between the commanded states
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| 2. |
If the E2LF side marker lamp-left front, E5E tail lamp-left rear and the E4J park lamp-left front are always ON or always OFF, refer to Left Side Marker/Tail Lamps Malfunction.
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| 3. |
Ignition ON, observe the function of the E2RF side marker lamp-right front, E5F tail lamp-right rear and the E4K park lamp-right front while commanding the Right Park Lamps ON and OFF with a scan tool. The E2RF side marker lamp-right front, E5F tail lamp-right rear and the E4K park lamp-right front should turn ON and OFF while changing between the commanded states
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| 4. |
If the E2RF side marker lamp-right front, E5F tail lamp-right rear and the E4K park lamp-right front are always ON or always OFF, refer to Right Side Marker/Tail Lamps Malfunction.
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| Circuit/System Testing |
Left Side Marker/Tail Lamps Malfunction
| 1. |
Disconnect the X1 harness connector at the E5E tail lamp-left.
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| 2. |
Test for less than 30 Ω between the ground circuit terminal C and ground.
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| 3. |
If greater than the specified range, test the ground circuit for an open/high resistance.
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| 4. |
Disconnect the appropriate inline harness connector listed below:
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X111 inline harness connector (With TT6/TT7/TT8)
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X115 inline harness connector (Without TT6/TT7/TT8)
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| 5. |
Test for less than 30 Ω between the ground circuit terminal listed below and ground:
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Ground circuit terminal A
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Ground circuit terminal E
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| 6. |
If greater than the specified range, test the ground circuit for an open/high resistance.
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| 7. |
Connect a test lamp between the control circuit terminal listed below and ground.
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E2LF side marker lamp-left front control circuit terminal K
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E4J park lamp-left front control circuit terminal B
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E5E tail lamp-left control circuit terminal B
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| 8. |
Ignition ON, command the Left Park Lamps ON and OFF with a scan tool. The test lamp should turn ON and OFF when changing between the commanded states.
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| 9. |
If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the K9 BCM.
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| 10. |
If the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuits test normal, replace the K9 BCM.
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| 11. |
If all the circuits test normal, replace the appropriate left marker lamp.
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Right Side Marker/Tail Lamps Malfunction
| 1. |
Disconnect the X1 harness connector at the E5F tail lamp-right.
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| 2. |
Test for less than 30 Ω between the ground circuit terminal C and ground.
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| 3. |
If greater than the specified range, test the ground circuit for an open/high resistance.
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| 4. |
Ignition OFF, disconnect the appropriate inline harness connector listed below:
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X112 inline harness connector (With TT6/TT7/TT8)
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X116 inline harness connector (Without TT6/TT7/TT8)
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| 5. |
Test for less than 30 Ω between the ground circuit terminal listed below and ground:
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Ground circuit terminal A
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Ground circuit terminal E
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| 6. |
If greater than the specified range, test the ground circuit for an open/high resistance.
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| 7. |
Connect a test lamp between the control circuit terminal listed below and ground.
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E2RF side marker lamp-right front control circuit terminal K
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E4K park lamp-right front control circuit terminal B
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E5F tail lamp-right control circuit terminal A
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| 8. |
Ignition ON, command the Right Park Lamps ON and OFF with a scan tool. The test lamp should turn ON and OFF when changing between the commanded states.
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| 9. |
If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the K9 BCM.
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| 10. |
If the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuits test normal, replace the K9 BCM.
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| 11. |
If all the circuits test normal, replace the appropriate right marker lamp
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| Repair Instructions |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
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Tail Lamp Replacement
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Headlamp Replacement (T84 T85)
Headlamp Replacement (TT6 HID)
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Control Module References
for BCM replacement, setup, and programming
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