Circuit Description
The DVD player monitors the video signal circuit from the DVD player to the video display screen. The DVD player outputs a video signal on this circuit when a video disc is playing in the DVD player. If the DVD has an internal video output failure or if the circuit becomes shorted to B+ or ground , DTC B1280 will set.
DTC Descriptor
This diagnostic procedure supports the following DTC:
DTC B1280 Rear Seat Entertainment (RSE) Input Signal Circuit
This vehicle has DTCs which include DTC Symptoms. For more information on DTC Symptoms, refer to DTC Symptom Description in Vehicle DTC Information.
DTC Symptom | DTC Symptom Descriptor |
|---|---|
18 | Signal Amplitude below Minimum |
Conditions for Running the DTC
| • | The radio is in the ACCESSORY, RUN, or RAP power mode. |
| • | The system voltage is at least 9.0 volts and no more than 16.0 volts. |
| • | A DVD disc playing in the DVD player. |
| • | All the above conditions are present for greater than 50 ms. |
Conditions for Setting the DTC
Any of the following conditions are present for 2 seconds or longer:
| • | The DVD detects a short to ground in the video signal circuit. |
| • | The DVD detects a loss of video signal output. |
Action Taken When the DTC Sets
The DVD shuts down the video signal output.
Conditions for Clearing the DTC
| • | A current DTC clears when the malfunction is no longer present. |
| • | A history DTC clears when the module ignition cycle counter reaches the reset threshold, without a repeat of the malfunction. |
| • | The DVD player receives a clear code command from the scan tool. |
Diagnostic Aids
This DTC will not set in the DVD player if the auxiliary inputs are selected as the source for the video screen and there is a video display problem. Go to Video Display is Poor or Blank .
Test Description
The numbers below refer to the step numbers on the diagnostic table.
-
This step determines if the code is current.
-
This step will isolate the problem to the DVD player.
-
This step determines whether the harness is the cause of the fault or the display screen.
Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Video System Schematics Connector End View Reference: Entertainment Connector End Views | |||
1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
Does the scan tool indicate that DTC B1280 is current? | Go to Step 3 | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | |
Disconnect the DVD player to the video display harness of the DVD player. Does the scan tool indicate that DTC B1280 is still present? | Go to Step 4 | Go to Step 7 | |
Test the video signal circuit for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 9 | Go to Step 5 | |
5 | Inspect for poor connections at the harness connector of the video display screen. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 9 | Go to Step 6 |
6 | Replace the video display screen. Refer to Video Display Replacement . Did you complete the replacement? | Go to Step 9 | -- |
7 | Inspect for poor connections at the harness connector of the DVD player. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 9 | -- |
8 | Replace the DVD player. Refer to Video Disc Player Replacement . Did you complete the replacement? | Go to Step 9 | -- |
9 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2 |
