DTC B3619
| DTC B3619 |
| 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 B3619 02
Head-Up Display Change Page Switch Circuit Short to Ground
DTC B3619 05
Head-Up Display Change Page Switch Circuit High Voltage/Open
DTC B3619 61
Head-Up Display Change Page Switch Circuit Stuck
| Diagnostic Fault Information |
| Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
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Head-Up Display Switch Signal
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B3619 02
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B3619 05
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B3619 05
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B3619 61
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Low Reference
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1
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-
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1. Head-Up Display Switch Malfunction
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| Circuit/System Description |
The head-up display switch is a multiplexed switch. The head-up display provides the head-up display switch with a low reference. The switch input to the head-up display is pulled low when a switch is activated. The head-up display switch is a momentary contact switch that connects a series of resistors in a resistor ladder format. The head-up display determines the switch pressed by the voltage drop across the resistors. Each switch state PAGE, UP, DOWN corresponds to a certain resistance value.
| Conditions for Running the DTC |
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The ignition is in OFF, ACCESSORY or RUN position.
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The system voltage is between 9-16 V.
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| Conditions for Setting the DTC |
B3619 02
The head-up display detects that the head-up display switch signal circuit is less than 900 mV.B3619 05
The head-up display detects that the head-up display switch signal circuit is greater than 4.3 V.B3619 61
The head-up display detects that the head-up display switch is stuck.| Action Taken When the DTC Sets |
The head-up display ignores the head-up display switch inputs.
| Conditions for Clearing the DTC |
The DTC will become history if the head-up display no longer detects a malfunction.
| Reference Information |
Schematic Reference
Head Up Display Schematics
Connector End View Reference
Component Connector End Views
Description and Operation
Head Up Display (HUD) 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 scan tool Adjust Display Up Switch parameter, that when the S27 Head-Up Display Switch Up is pressed and released the scan tool parameter toggles between Active and Inactive.
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| 2. |
Observe the scan tool Adjust Display Down Switch parameter, that when the S27 Head-Up Display Switch Down is pressed and released the scan tool parameter toggles between Active and Inactive.
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| 3. |
Observe the scan tool Page Switch parameter, that when the S27 Head-Up Display Switch Page is pressed and released the scan tool parameter toggles between Active and Inactive.
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| Circuit/System Testing |
| 1. |
Ignition OFF, disconnect the harness connector at the S27 Head-Up Display Switch.
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| 2. |
Test for less than 5 Ω between the low reference circuit terminal 1 and ground.
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| 3. |
If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the P29 Head-Up Display.
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| 4. |
Ignition ON, verify that all scan tool Head-Up Switch parameter are Undefined.
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| 5. |
If any not Undefined, test the signal circuit for a short to ground. If the circuit tests normal, replace the P29 Head-Up Display.
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| 6. |
Ignition ON, install a 604 Ω resistance between the signal circuit terminal 6 and the low reference circuit terminal 1. Verify the scan tool Page Switch parameter is Active.
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| 7. |
If not Active, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the P29 Head-Up Display Module.
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| 8. |
If all circuits test normal, test or replace the S27 Head-Up Display Switch.
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| Component Testing |
Static Test
| 1. |
Ignition OFF, disconnect the harness connector at the S27 Head-Up Display Switch.
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| 2. |
Test for 8.8-9.3 kΩ between the signal terminal 6 and the low reference circuit terminal 1.
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| 3. |
If not within the specified range, replace the S27 Head-Up Display Switch.
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| 4. |
Test for 550-650 Ω between the signal terminal 6 and the low reference circuit terminal 1 while pressing the Page switch.
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| 5. |
If not within the specified range, replace the S27 Head-Up Display Switch.
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| 6. |
Test for 1.5-1.7 kΩ between the signal terminal 6 and the low reference circuit terminal 1 while pressing the Up switch.
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| 7. |
If not within the specified range, replace the S27 Head-Up Display Switch.
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| 8. |
Test for 3.3-3.7 kΩ between the signal terminal 6 and the low reference circuit terminal 1 while pressing the Down switch.
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| 9. |
If not within the specified range, replace the S27 Head-Up Display Switch.
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| Repair Instructions |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
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Instrument Cluster Head Up Display Replacement
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Instrument Cluster Head Up Display Dimmer Switch Replacement
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Control Module References
for instrument cluster replacement, setup and programming
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