Diagnostics and headlight check (Discovery 3)

Review

Three headlight options available: halogen, bi-xenon or adaptive front lighting system (AFS).

Refer to section 417-00 for a detailed description of system design and operation «External lighting fixtures» in the workshop manual.

Because there is a risk of injury, be sure to observe the following safety precautions.

Safety information

WARNING: Xenon headlight systems can have voltages of up to 28,000 V. Be sure to switch off the headlights before working on them. Failure to follow this instruction may result in injury.

The following precautions must be observed when working on the xenon headlight system:

1. It is FORBIDDEN to carry out any work on the xenon headlight system with the lights on.

2. Work with xenon lamps only with the use of personal protective equipment such as gloves and goggles. Do not touch the glass bulb of the lamp.

3. Disposal of xenon lamps must be carried out according to the rules for the disposal of hazardous waste.

4. You can turn on the lamp only when it is in the installed position, in the reflector.

Full instructions for prescribed xenon headlight system repair procedures are given in Section 100-00 "General information, standard operating procedures" manuals for service stations.

Inspection and verification

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

Be aware that intermittent fault messages may be due to the cycling nature of the FETs (FET).

2. Visually inspect for obvious mechanical and electrical problems.

Mechanical factors

Electrical Factors

Condition and installation of headlights (s) Lamp (lamps) and installation Cartridge (s) lamps and installation Light switch and its installation Status and installation of the left multifunction switch on the steering column

Fuses Battery Electrical Junction Box (BJB) - 11E BJB fuse link - 15E BJB fuse link - 16E BJB fuse link - 25E fuse link (CJB) - fuse 61P CJB - fuse 56P CJB -fuse 27P CJB - fuse 62P CJB - fuse 18P CJB - fuse 2P CJB - fuse 4P CJB -fuse 67P Relay for automatic headlights Relay for position lamps Wiring harness Loose or corroded connector (ov) Battery Electrical Junction Box (BJB) Central electrical box (CJB) Adaptive Front Light Module (AFS) Headlight modules Dashboard (IPC) Steering Angle Sensor Module (SASM) transmission control module (TCM) Engine control module (ECM) Anti-Lock Braking System Control Module (ABS) Air suspension control module LIN circuits (Local interconnect network) CAN electrical circuits (Control Area Network)

3. If an obvious cause of a problem you identified or described by a customer is found, resolve it before proceeding to 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	Action
Lamp (s) low beam headlight not working / lamp (s) high beam headlight not working	Lamp failure Fuse (And) burned out Electrical circuit malfunction Faulty light switch Malfunction of the left multifunction switch on the steering column	Check the condition of the lamp and fuse (see visual inspection table). Check headlight circuits. Check the operation of the light switch. Check the operation of the left multifunction switch on the steering column. Refer to the electrical manual. Check for DTCs that indicate a problem with the headlight or its associated electrical circuit.
Dim lamp light (s) low beam / lamp (s) high beam headlights not working	Incorrect lamp power The lever for selecting the left-hand or right-hand traffic system is not in the correct position Electrical circuit malfunction Faulty light switch Malfunction of the left multifunction switch on the steering column	Check the condition and power of the lamp. Check that the left-hand or right-hand traffic selector lever is correctly installed. Check headlight circuits. Check the operation of the light switch. Check the operation of the left multifunction switch on the steering column. Refer to the electrical manual.
Lamp (s) low beam headlights constantly on / lamp (s) high beam headlights stay on	Electrical circuit malfunction Faulty light switch Malfunction of the left multifunction switch on the steering column Faulty headlight timer function	Check headlight circuits. Check the operation of the light switch. Check the operation of the left multifunction switch on the steering column. Check the operation of the headlight timer function. Refer to the electrical manual. Check for DTCs that indicate a malfunction in the headlight circuit.
The high/low beam switch function does not work	Electrical circuit malfunction Malfunction of the left multifunction switch on the steering column Xenon headlight breaker mechanism malfunction	Check headlight circuits. Check the operation of the left multifunction switch on the steering column. Check the operation of the xenon headlight breaker mechanism. Refer to the electrical manual. Check for DTCs that indicate a malfunction in the headlight circuit.
Pilot lamp (s) does not work	Fuse (And) burned out Faulty light switch Malfunction of the left multifunction switch on the steering column Electrical circuit malfunction Instrument panel malfunction	Check fuse (And) (see visual inspection). Check the operation of the light switch. Check the operation of the left multifunction switch on the steering column. Check the test lamp electrical circuits. Refer to the electrical manual. Check for DTCs that indicate a problem with the instrument panel or CAN system.

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).

DTC	Description	Possible reasons	Action
B1D0011	Left low beam	Left Low Beam Lamp Circuit Short to Ground	Refer to the guided diagnostic program for this code on the approved diagnostic system. Refer to the electrical manuals and check the circuit. Replace/repair if necessary.
B1D0015	Left low beam	Left Low Beam Lamp Circuit Short to Battery Left Low Beam Lamp Circuit High Resistance	Refer to the guided diagnostic program for this code on the approved diagnostic system. Refer to the electrical manuals and check the circuit. Replace/repair if necessary.
B1D0111	Right low beam	Right Low Beam Lamp Circuit Short to Ground	Refer to the guided diagnostic program for this code on the approved diagnostic system. Refer to the electrical manuals and check the circuit. Replace/repair if necessary.
B1D0115	Right low beam	Right Low Beam Lamp Circuit Short to Battery Right Low Beam Lamp Circuit High Resistance	Refer to the guided diagnostic program for this code on the approved diagnostic system. Refer to the electrical manuals and check the circuit. Replace/repair if necessary.
B1D0211	Left High Beam Circuit	Left High Beam Bulb Circuit Short to Ground	Refer to the guided diagnostic program for this code on the approved diagnostic system. Refer to the electrical manuals and check the circuit. Replace/repair if necessary.
B1D0215	Left High Beam Circuit	Left High Beam Bulb Circuit Short to Battery Left High Beam Bulb Circuit High Resistance	Refer to the guided diagnostic program for this code on the approved diagnostic system. Refer to the electrical manuals and check the circuit. Replace/repair as needed.
B1D0311	Right High Beam Circuit	Right High Beam Lamp Circuit Short to Ground	Refer to the guided diagnostic program for this code on the approved diagnostic system. Refer to the electrical manuals and check the circuit. Replace/repair if necessary.
B1D0315	Right High Beam Circuit	Right High Beam Bulb Circuit Short to Battery Right High Beam Bulb Circuit High Resistance	Refer to the guided diagnostic program for this code on the approved diagnostic system. Refer to the electrical manuals and check the circuit. Replace/repair if necessary.
B1D3613	Turn signal switch	Steering column multifunction switch left: high resistance	Refer to the guided diagnostic program for this code on the approved diagnostic system. Refer to the electrical manuals and check the circuit. Replace/repair if necessary.
B1D4013	Light switch connection circuit	Light switch circuit high resistance	Refer to the guided diagnostic program for this code on the approved diagnostic system. Refer to the electrical manuals and check the circuit. Replace/repair if necessary.
U018287	Lost Communication With Lighting Control Module - Front	CAN bus failure Disconnected AFS module AFS module not configured/calibrated AFS module failure	Refer to section "Network communication" in the workshop manual.
U300016	control module	The voltage in the electrical circuit is below the threshold value	Check the condition and charge of the battery. See section 414-00 "Charging system" manuals for service stations. Check the electrical circuits of the control module. Refer to the electrical manual.
U300017	control module	The voltage in the electrical circuit is above the threshold value	Check the condition and charge of the battery. See section 414-00 "Charging system" manuals for service stations. Check the electrical circuits of the control module. Refer to the electrical manual.
U300042	control module	General memory failure	If a module is suspected, refer to the warranty policy and procedures manual.
U300055	control module	Wrong software loaded CAN wiring to AFS module high resistance Wrong CAN configuration for AFS module	Configure the modules using an approved diagnostic system. Check for CAN related DTCs.
U1A1449	CAN initialization failure	Internal electronic fault	Check the power circuits and grounds of the device. Refer to the electrical manual. Customize the module configuration (modules), using an approved diagnostic system. If a module is suspected, refer to the warranty policy and procedures manual.