PRE-RELEASE
DTC B364A
| DTC B364A |
| 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 Descriptor |
DTC B364A 00
Surveillance Mode Switch Circuit Malfunction
| Diagnostic Fault Information |
| Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
| Front Fog Lamps Switch Signal | - | - | - | B2740 00 |
| Circuit/System Description |
The front fog lamp relay is supplied with battery voltage at all times. The front fog lamp switch signal circuit is grounded momentarily by pressing the front fog lamp switch. The body control module (BCM) energizes the front fog lamp relay by applying ground to the front fog lamp relay control circuit. When the front fog lamp relay is energized, the relay switch contacts close and battery voltage is applied through the front fog lamp fuse to the front fog lamp supply voltage circuit which illuminates the front fog lamps.
| Conditions for Running the DTC |
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The ignition is turned ON.
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Front fog lamp switch activated.
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| Action Taken When the DTC Sets |
Front Fog Lamps Malfunction
| Conditions for Setting the DTC |
Front fog lamp switch stuck
| Conditions for Clearing the DTC |
The condition for setting the DTC is not longer present.
| Reference Information |
Schematic Reference
Fog 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 |
Ignition ON, observe the scan tool Front Fog Lamps Switch parameter. The reading should change between Active/Inactive when changing between pressed and released front fog lamp switch button.
| Circuit/System Testing |
| 1. |
Ignition OFF, disconnect the X1 and X3 harness connector at the K9 Body Control Module.
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| 2. |
Ignition ON, test for less than 0.3 V at the K9 Body Control Module signal circuit harness terminal 9 X1 and ground.
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| 3. |
If greater then the specified value, test the signal circuit for an short to voltage.
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| 4. |
Test for less than 0.3 V at the K9 Body Control Module 12 V reference circuit harness terminal 4 X3 and ground.
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| 5. |
If greater than the specified value, test the 12 V reference circuit for a short to voltage.
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| 6. |
Ignition OFF, test for infinite resistance between the K9 Body Control Module signal circuit harness terminal 9 X1 and ground.
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| 7. |
If lower than the specified value, test the signal circuit for a short to ground.
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| 8. |
Test for infinite resistance between the K9 Body Control Module 12 V reference circuit harness terminal 4 X3 and ground.
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| 9. |
If lower than the specified value, test the 12 V reference circuit for a short to ground.
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| 10. |
Press and hold the front fog lamp switch button.
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| 11. |
Test for 2.6-3.2 kΩ between the K9 Body Control Module 12 V reference circuit harness connector X3 terminal 4 and the K9 Body Control Module signal circuit harness terminal 9 X1.
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| 12. |
If not within the specified range, test the 12 V reference circuit and the signal circuit for an open/high resistance. If the circuits test normal, replace the S30 Headlamp Switch.
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| 13. |
If all circuits test normal, replace the K9 Body Control Module.
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| Component Testing |
Static Test
Ignition OFF, disconnect the harness connector at the S30 Headlamp Switch. Press and hold the front fog lamp switch button, test for 2.6-3.2 kΩat the S30 Headlamp Switch terminal 1 and terminal 12.| Repair Instructions |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
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Headlamp Switch Replacement
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Control Module References
for BCM replacement, setup, and programming
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