PRE-RELEASE
DTC B1289
| DTC B1289 |
| 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 B1289 01
Video Display Brightness Control Signal Short to Battery
DTC B1289 02
Video Display Brightness Control Signal Short to Ground
DTC B1289 04
Video Display Brightness 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 control the seatback video display brightness on vehicles equipped with rear seat entertainment (RSE) video. A single brightness control circuit is used by the radio to control the display screen brightness for both displays via a pulse width modulated signal. If the display screen does not receive a signal, the display screen will operate at default brightness, which is a middle brightness level.
| Conditions for Running the DTC |
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Ignition ON.
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Battery voltage must be between 9-16 volts.
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| 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 brightness 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 full brightness.
| Conditions for Clearing the DTC |
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The condition responsible for setting the DTC no longer exists.
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A history DTC will clear once 100 consecutive malfunction-free ignition cycles have occurred.
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| 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
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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, Radio ON, DVD playing, use the infrared remote control to change the brightness level of the seatback video displays.
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| 2. |
If one of both of the seatback video displays brightness level cannot be controlled, refer to Circuit/System Testing.
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| 3. |
Verify that DTC B1289 is NOT set as current.
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| 4. |
If DTC B1289 is set as current, refer to Circuit/System Testing.
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| Circuit/System Testing |
| 1. |
Ignition OFF, disconnect the harness connectors at both of the P22 seatback video displays.
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| 2. |
Ignition ON, DVD playing, test for 190-210 HZ DC between the video brightness control circuit terminal 16 and ground at each of the P22 seatback video displays.
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| 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.
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| 4. |
Ignition OFF, reconnect the harness connector at the P22E driver seatback video display.
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| 5. |
Ignition ON, DVD playing, test for 190-210 HZ DC between the video brightness control circuit terminal 16 and ground at the P22F passenger seatback video display.
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| 6. |
If not within the specified range, replace the P22E driver seatback video display.
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| 7. |
If all circuits test normal, replace the P22F passenger seatback video display.
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| Repair Instructions |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
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Video Display Replacement
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Control Module References
for Radio replacement, setup, and programming
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