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DTC B3619

DTC B3619

Diagnostic Instructions


Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

Review Strategy Based Diagnosis for an overview of the diagnostic approach.

Diagnostic Procedure Instructions provides an overview of each diagnostic category.


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
Head-Up Display Switch Signal

B3619 02

B3619 05

B3619 05

B3619 61

Low Reference

-

1

-

-

1. Head-Up Display Switch Malfunction



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


The ignition is in OFF, ACCESSORY or RUN position.

The system voltage is between 9-16 V.


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


Circuit Testing

Connector Repairs

Testing for Intermittent Conditions and Poor Connections

Wiring Repairs


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.

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.

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.


Circuit/System Testing


1. Ignition OFF, disconnect the harness connector at the S27 Head-Up Display Switch.

2. Test for less than 5 Ω between the low reference circuit terminal 1 and ground.

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.

4. Ignition ON, verify that all scan tool Head-Up Switch parameter are Undefined.

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.

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.

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.

8. If all circuits test normal, test or replace the S27 Head-Up Display Switch.


Component Testing


Static Test

1. Ignition OFF, disconnect the harness connector at the S27 Head-Up Display Switch.

2. Test for 8.8-9.3 kΩ between the signal terminal 6 and the low reference circuit terminal 1.

3. If not within the specified range, replace the S27 Head-Up Display Switch.

4. Test for 550-650 Ω between the signal terminal 6 and the low reference circuit terminal 1 while pressing the Page switch.

5. If not within the specified range, replace the S27 Head-Up Display Switch.

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.

7. If not within the specified range, replace the S27 Head-Up Display Switch.

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.

9. If not within the specified range, replace the S27 Head-Up Display Switch.


Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.


Instrument Cluster Head Up Display Replacement

Instrument Cluster Head Up Display Dimmer Switch Replacement

Control Module References for instrument cluster replacement, setup and programming