PRE-RELEASE
DTC B1288
| DTC B1288 |
| 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 B1288 01
Video Display Mode Control Signal Short to Battery
DTC B1288 02
Video Display Mode Control Signal Short to Ground
DTC B1288 04
Video Display Mode Control Signal Open Circuit
| Diagnostic Fault Information |
| Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
| Video Display B+ | 2 | 1 | - | - |
| Remote Enable Control Circuit | B1265 02, 3 | 4 | 5 | - |
| DVD Audio Common Signal (-) | 6 | 6 | 6 | - |
| Left DVD Audio Signal (+) | 7 | 7 | 7 | - |
| Right DVD Audio Signal (+) | 8 | 8 | 8 | - |
| DVD Video Signal (+) | 9 | 9 | 7 | - |
| DVD Video Signal (-) | 9 | 9 | 9, 10 | - |
| Infrared Remote Signal (+) | 11 | 11 | 11 | - |
| Infrared Remote Signal (-) | 11 | 11 | 11 | - |
| Video Mode Signal | B1288 02, 12 | B1288 04, 12 | B1288 01, 12 | - |
| Video Bright Signal | B1289 02, 13 | B1289 04, 13 | B1289 01, 13 | - |
| Ground Terminal 8 | - | 1 | - | - |
| Ground Terminal 14 | - | 1 | - | - |
| 1. One or both seatback displays inoperative 2. Both seatback displays inoperative 3. All infotainment devices controlled by circuit inoperative, no sound from speakers 4. One or more infotainment devices controlled by circuit inoperative 5. Power state of all infotainment devices controlled by circuit cannot be controlled by radio 6. No or distorted audio heard in wireless headphones 7. No or distorted left channel audio heard in wireless headphones 8. No or distorted right channel audio heard in wireless headphones 9. No or distorted image in seatback display 10. Serious damage to radio can occur 11. Infrared remote control inoperative 12. Seatback display mode cannot be controlled/changed 13. Seatback display brightness cannot be controlled/adjusted | ||||
| Circuit/System Description |
The radio can command the seatback video display mode on vehicles equipped with rear seat entertainment (RSE) video. The radio utilizes discreet mode control circuits to each display to control the screen display mode via a pulse width modulated signal. If the display screen does not receive a signal, the display screen will operate in a default full screen mode.
| Conditions for Running the DTC |
| • |
Ignition ON.
|
|
| • |
Battery voltage must be between 9-16 volts.
|
|
| Conditions for Setting the DTC |
The DTC will set when the radio detects a short to voltage, short to ground, or an open/high resistance in the video display mode control circuit 400 ms after the radio activates the remote enable circuit.
| Action Taken When the DTC Sets |
The radio sets the DTC and defaults the video display to normal mode.
| Conditions for Clearing the DTC |
| • |
The condition responsible for setting the DTC no longer exists.
|
|
| • |
A history DTC will clear once 100 consecutive malfunction-free ignition cycles have occurred.
|
|
| Reference Information |
Schematic Reference
Video System Schematics
Connector End View Reference
Component Connector End Views
Description and Operation
Video Entertainment System 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, Radio ON, DVD playing, use the infrared remote control to change the display mode of the seatback video displays.
|
|
| 2. |
If one of both of the seatback video displays mode setting cannot be controlled, refer to Circuit/System Testing.
|
|
| 3. |
Verify that DTC B1288 is NOT set as current.
|
|
| 4. |
If DTC B1288 is set as current, refer to Circuit/System Testing.
|
|
| Circuit/System Testing |
| 1. |
Ignition OFF, disconnect the harness connector at the appropriate P22 seatback video display.
|
|
| 2. |
Ignition ON, DVD playing, test for 190-210 HZ DC between the video mode control circuit terminal 15 and ground.
|
|
| 3. |
If not within the specified range, test the control circuit for a short to voltage, short to ground, or an open/high resistance. If the circuit tests normal, replace the radio.
|
|
| 4. |
If all circuits test normal, replace the P22 rear video display.
|
|
| Repair Instructions |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
| • |
Video Display Replacement
|
|
| • |
Control Module References
for Radio replacement, setup, and programming
|
|
