PRE-RELEASE
DTC B096A
| DTC B096A |
| 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 B096A 02
Hazard Lamps Switch Backlight Circuit Short to Ground
| Diagnostic Fault Information |
| Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
| Interior Backlighting Control | B096A 02 | 2 | 1 | - |
| 1. Hazard Backlighting at Full Intensity and Cannot be Dimmed 2. Hazard Backlighting do Not Illuminate | ||||
| Circuit/System Description |
The body control module (BCM) supplies a voltage reference through the instrument panel cluster dimming voltage reference circuit to the instrument panel cluster lamps dimmer switch, which is part of the headlamp switch. When the dimmer switch is placed in a desired brightness position, reference voltage is applied through the dimmer switch rheostat and the cluster lamps dimmer switch signal circuit to the BCM. The BCM interprets this voltage signal, then applies a pulse width modulated (PWM) voltage to the LED dimming supply circuit to all related interior lamps, illuminating them to the desired level of brightness.
| Conditions for Running the DTC |
The ignition is ON.
| Conditions for Setting the DTC |
B096A 02
The BCM detects a short to ground on the LED backlight lamp control circuit.| Action Taken When the DTC Sets |
The BCM will not dim or illuminate any LED backlighting supplied by the backlight lamp control circuits.
| Conditions for Clearing the DTC |
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The condition responsible for setting the DTC no longer exists.
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A history DTC will clear once 100 consecutive malfunction ignition cycles have occurred.
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| Reference Information |
Schematic Reference
Interior Lights Dimming Schematics
Connector End View Reference
Component Connector End Views
Description and Operation
Interior 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, vary the interior backlighting from dim to full bright by using the dimmer switch. The interior backlighting should dim and then become full bright.
| Circuit/System Testing |
| 1. |
Ignition OFF, disconnect the harness connector at the S26 Hazard Lamps Switch.
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| 2. |
Test for less than 5 Ω between the ground circuit terminal 1 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. |
Connect a test lamp between the backlight control circuit of the S26 Hazard Lamps Switch terminal 5 and ground.
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| 5. |
Ignition ON, vary the interior lamp dimming switch from dim to full bright. The test lamp should dim and then become full bright.
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If the test lamp cannot be dimmed, 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 open/high resistance or short to ground. If the circuit tests normal, replace the K9 body control module.
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| 8. |
If all circuits test normal, replace the S26 Hazard Lamps Switch.
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| Repair Instructions |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
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Radio Control Assembly Replacement
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Control Module References
for BCM replacement, setup, and programming
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