Diagnostics and check of the instrument panel (Discovery 3)

Review

Data to the instrument panel from modules of other subsystems are fed in the form of CAN·messages. The instrument panel identifies the signals and displays the corresponding message in the message center. Most messages are accompanied by a beep or series of beeps, which are requested by the module generating the message. The driver can view the current system status messages through the instrument panel software by pressing and holding the reset route data button for more than 3 seconds, then the information display will show the current messages in priority order. For more information, see the relevant section of the workshop manual.

Vehicle configuration file (CCF)

CAUTION: If a new instrument panel is to be installed, the instrument panel replacement procedure must be followed using an approved diagnostic system. This will ensure correct transmission of CCF data from the central electrical box (CJB) to the replacement instrument panel. If the vehicle is service modified from the original factory specification, the CCF will also require an update with an approved diagnostic system. This may include dealer installation of non-standard wheels and/or tires and optional accessory accessories with an electrical interface such as a parking distance control system.

The CCF contains all relevant data on the specification and sales condition of the respective vehicle, immobilization codes and driver personalization. This information is stored in the CJB, Engine Control Module (ECM) and instrument panel, allowing each system module to detect which systems and components are installed on the vehicle. Information is constantly transferred between these three modules of the system, providing continuous duplication of data between modules.

Inspection and verification

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

2. Confirm which, if any, warning lights and/or messages are lit/displayed on the instrument panel. For a list of messages, see the workshop manual section 413-08, "Message center".

3. Visually inspect for obvious electrical problems.

Electrical Factors

Accumulator battery Fuses Central electrical junction box and battery electrical junction box Larger fuses Wiring harness Damaged, loose, or corroded electrical connectors CAN electrical circuits (Control Area Network) Dashboard Central electrical box (CJB) Engine control module (ECM)

4. If an obvious cause of a problem you identified or described by the customer is found, resolve it before proceeding to the next steps (if possible).

5. Use an approved diagnostic system or scan tool (tester), to retrieve all DTCs before accessing the DTC Index (DTC).

Clear all DTCs after troubleshooting.

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 reason (s)	Actions
B1A0016	control module	Low battery voltage Battery earth wire: high resistance Loose/corroded battery connections Battery leakage	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 manual for service stations. Check the electrical supply and ground circuits of the module. Refer to the electrical manual.
B1A0046	control module	Calibration/parameter memory failure	Configure the module using an approved diagnostic system. If a module is suspected, refer to the warranty policy and procedures manual.
B1A0048	control module	Control software failure	Configure the module using an approved diagnostic system. If a module is suspected, refer to the warranty policy and procedures manual.
B1A004B	control module	Control module: elevated temperature	Consider atmospheric conditions before rejecting a module. Clear the DTC and recheck. If a module is suspected, refer to the warranty policy and procedures manual.
B1A1496	RCM warning lamp	Failure of a control lamp SRS	Check the operation of the control lamp. Check electrical circuits between RCM and instrument cluster. Refer to the electrical manual.
B1A7592	Fuel gauge #1	Fuel level sensor circuit short circuit to ground, short circuit to power, high resistance Fuel Level Sensor Malfunction	Refer to the guided diagnostic program for this code on the approved diagnostic system.
B1A7692	Fuel gauge #2	Fuel level sensor circuit short circuit to ground, short circuit to power, high resistance Fuel Level Sensor Malfunction	Refer to the guided diagnostic program for this code on the approved diagnostic system.
B1A7864	Front fog lights	Front fog lamp signal circuit short to ground, short to power, high resistance Front Fog Lamp Switch Malfunction	Refer to the guided diagnostic program for this code on the approved diagnostic system.
B1A7964	Rear fog lights	Rear fog light signal circuit short to ground, short to power, high resistance Rear Fog Lamp Switch Malfunction	Refer to the guided diagnostic program for this code on the approved diagnostic system.
B1A8064	Oil pressure	Oil pressure signal circuit short to ground, short to power, high resistance Oil pressure switch malfunction	Refer to the guided diagnostic program for this code on the approved diagnostic system.
B1A8164	Internal routing data switch	Lack of signal plausibility	Refer to the guided diagnostic program for this code on the approved diagnostic system.
B1A8264	External routing data switch	External routing data switch signal circuit short to ground, short to battery, high resistance External routing data switch failure	Refer to the guided diagnostic program for this code on the approved diagnostic system.
B1A8446	Vehicle configuration data	Calibration/parameter memory failure Configure the module using an approved diagnostic system. If a module is suspected, refer to the warranty policy and procedures manual. B1A8664 Ignition status Lack of signal plausibility	Check ignition status. Check for ignition related DTCs.
B1A8768	Disconnecting the battery / resetting the electronic control unit (ECU)	Event information Battery disconnected	Check if the vehicle has been started from an external battery using the connecting wires. Check the condition and charge of the battery. Refer to the relevant section in the workshop manual.
B1A8849	System timer	Internal electronic fault The power supply has detected a failure of the real time clock	If a module is suspected, refer to the warranty policy and procedures manual.
U000187	High speed CAN data bus	No message	Refer to section "Network communication" in the workshop manual.
U000188	High speed CAN data bus	High speed CAN bus - off	Refer to section "Network communication" in the workshop manual.
U001087	Medium speed CAN bus	No message	Refer to section "Network communication" in the workshop manual.
U001088	Medium speed CAN bus	Bus disabled	Refer to section "Network communication" in the workshop manual.
U010087	Lost communication with ECM/PCM "A"	Missing CAN·message for instrument panel/engine control module	Refer to section "Network communication" in the workshop manual.
U010187	Loss of communication with TCM	Missing CAN Message for Instrument Panel/Transmission Control Module	Refer to section "Network communication" in the workshop manual.
U010287	Lost Communication With Transfer Case Control Module	Missing CAN Message for Instrument Cluster/Transfer Case Control Module	Refer to section "Network communication" in the workshop manual.
U010487	Lost Communication With Cruise Control Module	Missing CAN Message for Instrument Cluster/Cruise Control Module	Refer to section "Network communication" in the workshop manual.
U012287	Lost Communication with Vehicle Dynamics Control Module	Missing CAN·message for instrument cluster/ABS module	Refer to section "Network communication" in the workshop manual.
U012687	Lost Communication With Steering Angle Sensor Module	Missing CAN·message for instrument cluster/SAS	Refer to section "Network communication" in the workshop manual.
U012787	Lost Communication With Tire Pressure Monitoring System Module	Missing CAN·message for instrument cluster/TPMS module	Refer to section "Network communication" in the workshop manual.
U012887	Lost Communication With Parking Brake Control Module	Missing CAN Message for Instrument Cluster/Parking Brake Control Module	Refer to section "Network communication" in the workshop manual.
U013287	Lost Communication with Suspension Control Module A	Missing CAN Message for Instrument Cluster/Air Suspension Control Module	Refer to section "Network communication" in the workshop manual.
U013387	Lost Communication with Active Roll Control Module	Missing CAN·message for instrument cluster/active stabilization system	Refer to section "Network communication" in the workshop manual.
U013687	Lost communication with differential control unit - rear	Missing CAN Message for Instrument Cluster/Electronic Rear Differential Control Module	Refer to section "Network communication" in the workshop manual.
U013887	Lost Communication with Terrain Response System Control Module	Missing CAN Message for Instrument Cluster/Terrain Response Control Module	Refer to section "Network communication" in the workshop manual.
U014087	Lost Communication With Body Control Module	No message	Refer to section "Network communication" in the workshop manual.
U015187	Lost Communication With Secondary Restraint System Control Module	Missing CAN·message for instrument cluster/RCM	Refer to section "Network communication" in the workshop manual.
U015987	Lost Communication With Parking Assist Control Module 'A'	Missing CAN Message for Instrument Cluster/Parking Assist Module	Refer to section "Network communication" in the workshop manual.
U016487	Lost Communication with HVAC System Control Module (heating, ventilation, air conditioning)	Missing CAN·message for instrument panel/ATC module	Refer to section "Network communication" in the workshop manual.
U016687	Lost Communication With Auxiliary Heater Control Module	Missing CAN·message for instrument cluster/auxiliary heater control module	Refer to section "Network communication" in the workshop manual.
U018287	Lost Communication With Lighting Control Module - Front	Missing CAN Message for Instrument Cluster/Adaptive Front Lighting Control Module (AFS)	Refer to section "Network communication" in the workshop manual.
U018487	Loss of communication with the radio	Missing CAN·message for instrument cluster/ACM	Refer to section "Network communication" in the workshop manual.