B127E

DTC B127E

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 B127E 00
- Front Video Display Output Signal

Circuit/System Description

The infotainment system info display module is supplied battery voltage and ground. The human machine interface module controls the power state of the display through the serial data circuit. Display backlighting dimming level, and screen touch signals are also communicated over the serial data circuit.

The human machine sends digital video signals to the display via a dedicated video interface cable. If the display detects poor or missing digital video signals, a serial data message is communicated to the human machine interface module.

Conditions for Running the DTC

* Ignition is ON or in the ACC position

* The system voltage is 9-16 V

* The infotainment system is ON

* The test is run once every 14 ms when the infotainment system is operating

Conditions for Setting the DTC

The info display module detects the digital video signal is missing or out of sync.

Action Taken When the DTC Sets

* The human machine interface module sets this DTC

* No images are shown on the info display module

Conditions for Clearing the DTC

* The info display module detects a properly synced digital video signal.

* A history DTC will clear once 50 consecutive malfunction-free ignition cycles have occurred.

Reference Information

Schematic Reference

Radio/Navigation System Schematics Radio/Navigation System Schematics

Connector End View Reference

Component Connector End Views Fuel Pump and Level Sensor Assembly

Description and Operation

Radio/Audio System Description and Operation Radio/Audio System

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 Testing

1. Ignition OFF.

2. Verify the video interface cable is properly connected at the P17 info display module X2 and the human machine interface module X5 connections and there is no damage to the cable or connections.

3. Ignition ON, infotainment system ON.

4. Verify the P17 info display module does not display an image.

• If the P17 info display module displays an image.
All OK.

• If the P17 info display module does not display an image.

5. Ignition OFF.

6. Replace the video interface cable.

7. Ignition ON, infotainment system ON.

8. Verify the P17 info display module displays an image.

• If the P17 info display module does not display an image

1. Replace the P17 info display module. Connect all harness connectors.

2. Ignition ON, infotainment system ON.

3. Verify the P17 info display module displays an image.

• If the P17 info display module still does not display an image, replace the human machine interface module.

• If the P17 info display module displays an image.

4. All OK.

• If the P17 info display module displays an image.

9. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification Verification Tests after completing the repair.

Control Module References Control Module References for human machine interface module replacement, programming, and setup.