B361B
DTC B361B
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Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis Strategy Based Diagnosis for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions Diagnostic Procedure Instructions provides an overview of each diagnostic category.
DTC Descriptor
DTC B361B 02
- Head-Up Display Switch Short to Ground
DTC B361B 05
- Head-Up Display Switch High Voltage/Open
DTC B361B 59
- Head-Up Display Switch Protection Time-Out
Diagnostic Fault Information
Circuit/System Description
The head-up display switch is a multiplexed switch that controls the head-up display based on driver inputs. The head-up display provides the switch with a low reference and monitors a signal circuit. The head-up display switch is made up of a resistor ladder and three switches: Dim +/-, Up/Down, and Page. When a switch is pressed, the signal voltage is pulled low through the resistor ladder. When pressed, each of the switches will result in a different signal voltage seen by the head-up display, depending on the switch's location on the resistor ladder.
Conditions for Running the DTC
The ignition is ON.
Conditions for Setting the DTC
B361B 02
The head-up display switch signal voltage is less than 1 V
B361B 05
The head-up display switch signal voltage is greater than 11.5 V
B361B 59
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 Head-Up Display Schematics
Connector End View Reference
Component Connector End Views Fuel Pump and Level Sensor Assembly
Description and Operation
Instrument Cluster Description and Operation Instrument Cluster
Electrical Information Reference
* Circuit Testing Circuit Testing
* Connector Repairs Connector Repairs
* Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections
* Wiring Repairs Wiring Repairs
Scan Tool Reference
Control Module References Control Module References for scan tool information
Circuit/System Verification
1. Ignition ON.
2. While holding each switch listed below, verify the scan tool Heads Up Display Switch State parameter is as follows:
* Dim + - HUD Dimming Up/Down Pressed
* Dim - - HUD Dimming Up/Down Pressed
* Up - HUD Movement
* Down - HUD Movement
* Page - HUD Page Switch
• If the scan tool parameter does not equal the expected result with the switch in the appropriate state
Refer to Circuit/System Testing.
• If the scan tool parameter equals the expected result with the switch in the appropriate state
3. All OK.
Circuit/System Testing
1. Ignition OFF and all vehicle systems OFF, disconnect the harness connector at the S27 head-up display switch. It may take up to 2 minutes for all vehicle systems to power down.
2. Test for less than 10 ohms between the low reference circuit terminal 3 and ground.
• If 10 ohms or greater
1. Ignition OFF, disconnect the harness connector at the P29 head-up display.
2. Test for less than 2 ohms in the low reference circuit end to end.
• If 2 ohms or greater, repair the open/high resistance in the circuit.
• If less than 2 ohms, replace the P29 head-up display.
• If less than 10 ohms
3. Test for less than 1 V between the signal circuit terminal 4 and ground.
• If 1 V or greater
1. Ignition OFF, disconnect the harness connector at the P29 head-up display.
2. Test for less than 1 V between the signal circuit and ground.
• If 1 V or greater, repair the short to voltage in the circuit.
• If less than 1 V, replace the P29 head-up display.
• If less than 1 V
4. Ignition ON.
5. Test for B+ between the signal circuit terminal 4 and ground.
• If less than B+
1. Ignition OFF, disconnect the harness connector at the P29 head-up display.
2. Test for infinite resistance between the signal circuit and ground.
• If less than infinite resistance, repair the short to ground on the circuit.
• If infinite resistance
3. Test for less than 2 ohms in the signal circuit end to end.
• If 2 ohms or greater, repair the open/high resistance in the circuit.
• If less than 2 ohms, replace the P29 head-up display.
• If B+
6. Test or replace the S27 head-up display switch.
Component Testing
1. Ignition OFF, disconnect the harness connector at the S27 head-up display switch.
2. Test for 3.4K - 4.2K ohms between the signal terminal 4 and the low reference terminal 3.
• If not between 3.4K - 4.2K ohms
Replace the S27 head-up display switch.
• If between 3.4K - 4.2K ohms
3. Test for 87 - 107 ohms between the signal terminal 4 and the low reference terminal 3 with the Dim + switch pressed.
• If not between 87 - 107 ohms
Replace the S27 head-up display switch.
• If between 87 - 107 ohms
4. Test for 291 - 356 ohms between the signal terminal 4 and the low reference terminal 3 with the Dim - switch pressed.
• If not between 291 - 356 ohms
Replace the S27 head-up display switch.
• If between 291 - 356 ohms
5. Test for 575 - 704 ohms between the signal terminal 4 and the low reference terminal 3 with the Up switch pressed.
• If not between 575 - 704 ohms
Replace the S27 head-up display switch.
• If between 575 - 704 ohms
6. Test for 1K - 1.2K ohms between the signal terminal 4 and the low reference terminal 3 with the Down switch pressed.
• If not between 1K - 1.2K ohms
Replace the S27 head-up display switch.
• If between 1K - 1.2K ohms
7. Test for 1.7K - 2.1K ohms between the signal terminal 4 and the low reference terminal 3 with the Page switch pressed.
• If not between 1.7K - 2.1K ohms
Replace the S27 head-up display switch.
• If between 1.7K - 2.1K ohms
8. All OK.
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the repair.
Control Module References Control Module References for head-up display replacement, programming, and setup