Video system diagnostics and testing (Discovery 3)

Review

The video system networked a range of networks and vehicle modules to provide a complete entertainment package for passengers.

Due to the complexity of the system, there are a number of different methods used to diagnose the system, as the networks used include the medium speed CAN bus, the MOST system (data transmission system for media systems) and other methods depending on the system.

Information about the video system and its operation can be found in the appropriate section of the workshop manual.

Information about networks and their operation can be found in the section "Network communication" manuals for service stations.

Inspection and verification

1. Make sure the customer's complaint is valid.

2. Visually inspect for obvious mechanical and electrical problems.

Mechanical factors	Electrical Factors
Installation and status of the front touch screen (TSD) Rear seat entertainment screen installation and status (RSE) Installation and status of the DVD changer TV antennas (two on each rear side window)	Fuses CJB - 42P fuse CJB - 52P fuse CJB - 53P fuse CJB - 57P fuse CJB - 58P fuse Wiring harnesses Fiber optic cable harnesses Relay of a complex of infotainment systems and equipment Display screens DVD changer TV tuner module RSE module TV antenna amplifiers (4) Remote control and batteries

3. If there is an obvious cause for the problem you identified or the customer described, fix it before proceeding with the next steps (if possible).

4. Use an approved diagnostic system or scan tool (tester), to retrieve all DTCs before referring to the symptom table or DTC index (DTC).


Since DTCs are stored in more than one module, a complete vehicle data readout is recommended.

Clear all DTCs after troubleshooting.

Symptom table

Symptom	Possible reasons	Actions
DVD player not working	DVD changer fuse blown No power to screens Condensation	Check the DVD circuits for a short circuit causing the fuse to blow and make any necessary repairs. Refer to the electrical manual. Check the power supply to the screens and make any necessary repairs. Refer to the electrical manual. Wait at least an hour for the condensation to dry.
Remote control erratic	Phone battery low voltage Dirty remote control receiver or transmitter sensor	Check and replace batteries if necessary. Check and, if necessary, clean the receiver and transmitter.
Image missing	The display screen is set to the wrong mode	Use the switch on the back of the handset to select the correct mode.
Playback does not start	Disc loaded upside down Wrong format disc loaded customized «parental lock» The setup menu is displayed	Make sure the disc is loaded correctly. Make sure the disc format is compatible. Cancel «parental lock» or check the disk rating. Press SET for at least 2 seconds to turn off the setup menu.
Image is fuzzy or noisy	Drive fast «rewound» forward or backward Low voltage car battery	The image may be slightly distorted in modes «rewind» forward or backward. Check the condition and charge level of the vehicle battery.
Image "freezes"	Disc scratched	Load an undamaged disc.
NO MAG is displayed	Magazine not loaded in DVD changer	Download the store.
NO DISC lights up	Disc not loaded in store Dirty disk	Upload the disc to the store. Clean up the disk if necessary.
REGIONAL CODE VIOLATION lights up	The loaded disc does not match the region code number	Load the disc that matches the region code number.
VIDEO SIGNAL IS NOT CORRECT lights up	NTSC disc loaded in PAL system, or vice versa	Load the correct format disc.
HI TEMP is displayed	The system protection circuit has been activated because it has detected a high temperature	Turn off the power on the unit (OFF), and then turn it on again. If the display does not clear, leave the power off until the temperature decreases and turn the power back on (ON).

DTC index

NOTE: Universal Scan Tools cannot read the listed codes or can only read 5-digit codes. Match the 5 digits from the scan tool with the first 5 digits of the listed 7 digit code to identify the problem (the last 2 digits give additional information read by the diagnostic system approved by the manufacturer).

DTCs	Description	Possible reasons	Action
B100E25	Input video signal "A"	Switching off the TV/rear seat entertainment video input TV/DVD malfunction	Make sure the input signal is connected and the system is transmitting.
B101025	Input video signal "WITH"	Rear camera video input disabled Camera failure	Make sure the input signal is connected and the system is transmitting.
B1A0016	control module	Control Module Circuit Voltage Below Threshold Voltage Less Than (voltage of the main control module - 2 V) for more than 10 s. Low battery voltage Control Module Circuit High Resistance	Check the condition and charge of the battery. Refer to the relevant section in the workshop manual. Check the power and ground circuits of the module. Refer to the electrical manual.
B1A0017	control module	Control module circuit voltage above threshold High battery voltage (recharge) Control Module Circuit Short to Battery	Check the condition and charge of the battery. Refer to the relevant section in the workshop manual. Check the power and ground circuits of the module. Refer to the electrical manual.
B1A0044	control module	Rear entertainment module - memory failure	If a module is suspected, refer to the warranty policy and procedures manual.
B1A0048	control module	Malfunction of control module control software	Configure the module using an approved diagnostic system. If a module is suspected, refer to the warranty policy and procedures manual.
B1A0049	control module	Internal failure of the electrical part of the amplifier (can be installed in multiple modules) Internal failure of the electrical part of the touch display (TSD) (can be installed in multiple modules)	Check the power and ground circuits of the module. Refer to the electrical manual. If a module is suspected, refer to the warranty policy and procedures manual.
B1A0098	control module	Rear entertainment system control module, element or system overheating	Check module and circuits. Refer to the electrical manual. Clear the DTC and recheck. Consider atmospheric conditions before rejecting a module.
B1A5611	Antenna	Antenna circuit short circuit to ground	Refer to the electrical manual and check the electrical circuit of the antenna. Refer to the guided diagnostic program for this code on the approved diagnostic system.
B1A5612	Antenna	Antenna circuit short circuit to + battery	Refer to the electrical manual and check the electrical circuit of the antenna. Refer to the guided diagnostic program for this code on the approved diagnostic system.
B1A5613	Antenna	Antenna Circuit: High Impedance	Refer to the electrical manual and check the electrical circuit of the antenna. Refer to the guided diagnostic program for this code on the approved diagnostic system.
B1D5079	DVD player	DVD Changer: Mechanical Failure Error Report by AiNet	Check for mechanical failure (store jamming, etc.). Repair if necessary.
B1D5093	DVD player	DVD changer not responding Communication error between main microprocessor and DVD microprocessor No response from AiNet	Refer to the electrical manual and check the AiNet electrical circuits. Repair if necessary.
B1D5098	DVD player	High temperature condition detected	Check the installation of the DVD module. Make sure there is sufficient airflow. Clear the DTC and recheck. Consider atmospheric conditions before rejecting a module.
B1D5511	Antenna #2	Antenna 2 circuit short circuit to ground	Check antenna and electrical circuits. Refer to the electrical manual.
B1D5512	Antenna #2	Antenna circuit 2 short circuit to battery	Check antenna and electrical circuits. Refer to the electrical manual.
B1D5513	Antenna #2	Antenna circuit 2 high impedance	Check antenna and electrical circuits. Refer to the electrical manual.
B1D5611	Antenna Circuit #3	Antenna circuit 3 short circuit to ground	Check antenna and electrical circuits. Refer to the electrical manual.
B1D5612	Antenna Circuit #3	Antenna circuit 3 short circuit to battery	Check antenna and electrical circuits. Refer to the electrical manual.
B1D5613	Antenna Circuit #3	Antenna circuit 3 high impedance	Check antenna and electrical circuits. Refer to the electrical manual.
B1D5711	Antenna Circuit #4	Antenna circuit 4 short circuit to ground	Check antenna and electrical circuits. Refer to the electrical manual.
B1D5712	Antenna Circuit #4	Antenna circuit 4 short circuit to battery	Check antenna and electrical circuits. Refer to the electrical manual.
B1D5713	Antenna Circuit #4	Antenna circuit 4 high impedance	Check antenna and electrical circuits. Refer to the electrical manual.
B1D5811	Output TV signal	Television output circuit short circuit to ground	Check TV output circuits. Refer to the electrical manual.
B1D5812	Output TV signal	TV output circuit short circuit to battery	Check TV output circuits. Refer to the electrical manual.
B1D5813	Output TV signal	TV output circuit high resistance	Check TV output circuits. Refer to the electrical manual.
B1D8193	Left rear display module	Left rear display not responding Communication error between main microprocessor and left display microprocessor No response from the IS bus	Check the IS bus circuits. Refer to the electrical manual.
B1D8198	Left rear display module	High temperature condition detected	Clear the DTC and recheck. Consider atmospheric conditions before rejecting a module.
B1D8293	Right rear display module	Right rear display not responding Communication error between main microprocessor and right display microprocessor No response from the IS bus	Check the IS bus circuits. Refer to the electrical manual.
B1D8298	Right rear display module	High temperature condition detected	Clear the DTC and recheck. Consider atmospheric conditions before rejecting a module.
U1A0131	Communication channel	NOTE: A message is displayed "NO NAVIGATION AVAILABLE" (navigation unavailable) Touch screen malfunction (TSD) navigation system module, video interface (GVIF) GVIF disconnected GVIF - short circuit to ground, short circuit to battery +, open circuit	Check that the GVIF circuit connectors are connected correctly. Refer to the electrical circuit diagrams and test the GVIF multimedia module circuits for short circuit to ground, short circuit to battery, or open circuit.
U1A1731	MOST Ring Break Message from Rear Entertainment Module (REM)	No signal from rear entertainment module (REM) Fiber Optic Ring Break Condition Registered	Perform a general MOST check. Refer to section "Network communication" in the workshop manual and use an approved diagnostic system.
U1A2087	Message about the break of the MOST ring network from the television module (TVM)	No signal from TV module (TVM) Fiber Optic Ring Break Condition Registered	Perform a general MOST check. Refer to section "Network communication" in the workshop manual and use an approved diagnostic system.
U300068	control module	Audio module event information - MOST transceiver overheating	Refer to the electrical manuals and check the power circuits and grounds of the device. Check the MOST circuit. Perform a general MOST check. Refer to section "Network communication" in the workshop manual and use an approved diagnostic system. If there is any doubt about the functionality of the module, refer to the Warranty Policy and Procedures Manual.