Land Rover Discovery: 12 Volt Midtronics GRX-3080 JLR Diagnostic Battery Charger

PRINCIPLES OF OPERATION

For a detailed description of the battery system and operation, refer to the relevant Description and Operation section of the workshop manual REFER to: Battery and Cables (414-01 Battery, Mounting and Cables, Description and Operation).

INSPECTION AND VERIFICATION

CAUTION:

Diagnosis by substitution from a donor vehicle is NOT acceptable.

Substitution of control modules does not guarantee confirmation of a fault and may also cause additional faults in the vehicle being checked and/or the donor vehicle.

NOTES:

• Generic scan tools may not read the codes listed, or may read only five digit codes. Match the five digits from the scan tool to the first five digits of the seven digit code listed to identify the fault (the last two digits give additional information read by the manufacturerapproved diagnostic system).
• When performing voltage or resistance tests, always use a digital multimeter that has the resolution ability to view 3 decimal places.

  For example, on the 2 volts range can measure 1mV or 2 K Ohm range can measure 1 Ohm. When testing resistance always take the resistance of the digital multimeter leads into account.

  Check and rectify basic faults before beginning diagnostic routines involving pinpoint tests.

• If DTCs are recorded and, after performing the pinpoint tests, a fault is not present, an intermittent concern may be the cause.

  Always check for loose connections and corroded terminals.

1. Verify the customer concern
2. Visually inspect for obvious signs of mechanical or electrical damage

Visual Inspection

3. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step
4. If the cause is not visually evident check for Diagnostic Trouble Codes (DTCs) and refer to the DTC Index
5. Check DDW for open campaigns. Refer to the corresponding bulletins and SSMs which may be valid for the specific customer complaint and carry out the recommendations as required

12 VOLT MIDTRONICS GRX - 3080 JLR DIAGNOSTIC BATTERY CHARGER USER GUIDE

The following steps must be carried out to ensure correct operation of the GRX-3080 JLR diagnostic battery charger during the battery test procedure

NOTE:

The GRX-3080 JLR diagnostic battery charger is suitable for testing flooded and absorbed glass mat (AGM) type batteries including Primary and Secondary batteries

Testing a Battery

Using the GRX-3080 JLR diagnostic battery charger, the following test procedure will confirm the serviceability of the battery (see Completing a Battery Test)

Battery Label Example

GRX-3080 JLR Diagnostic Battery Charger Display Keypad

The GRX-3080 JLR diagnostic battery charger has an integrated display and keypad, the display guides the user via onscreen navigation aids, directions and messages. The illustration (below) shows how the elements on the screen relate to the keypad and details the functions of the various keys:

Battery Test Types

Before performing any battery diagnostic on a vehicle, make sure the ignition is OFF and the vehicle is powered down, with the modules entering 'sleep mode' before commencing and with the hazard switch illumination extinguished The Midtronics GRX-3080 JLR diagnostic battery charger has three types of battery test (Diagnostic Charging, PDI / Storage and Battery Storage), one battery support function (Battery Support Power Supply) and one manual charging option available (Recovery Charging) for the technician to select:

DIAGNOSTIC CHARGING

1. The DIAGNOSTIC CHARGING test needs to be used on any battery that has started its warranty life cycle. The battery is in use and fitted to a vehicle registered to an owner. The GRX-3080 JLR diagnostic battery charger will determine the internal condition of a battery before attempting to apply a charge to it. If required, it will then charge and assess the battery until the battery condition is established and a test result is given

PDI / STORAGE

2. The PDI / STORAGE test needs to be used on any battery that has not yet been entered into the warranty life cycle. The battery is fitted to a NEW vehicle, but the vehicle has not yet been sold/registered to an owner. The GRX-3080 JLR diagnostic battery charger will determine the internal condition of a battery before attempting to apply a charge to it. If required, it will then charge and assess the battery until the battery condition is established and a test result is given

BATTERY STORAGE

3. The BATT. STORAGE test should be used on any battery that has not yet been entered into the warranty life cycle. The battery is not in use and is a Parts Stock battery and has not yet been fitted to a vehicle. The GRX- 3080 JLR diagnostic battery charger will determine the internal condition of a battery before attempting to apply a charge to it. If required, it will then charge and assess the battery until the battery condition is established and a test result is given

BATTERY SUPPORT Power Supply

4. The BATTERY SUPPORT Power Supply function needs to be used whenever the vehicle comes in to the workshop for regular maintenance or vehicle module updates. Updating modules can take up to several hours and during that period a lot of current will be depleted from the battery. To support the battery during this process use the BATTERY SUPPORT function. When working on a vehicle, it is recommended that the GRX-3080 is connected and switched to the BATTERY SUPPORT function to ensure that, when the work is completed, the battery's state of charge is maintained at a healthy level

RECOVERY CHARGING

5. The RECOVERY CHARGING mode should only be used when the battery voltage is below nine volts. The current should be set to 50 amps for a flooded battery or 40 amps for an AGM battery. The timer for the duration of the RECOVERY CHARGING cycle should be set for one hour.

Once RECOVERY CHARGING is complete, the DIAGNOSTIC CHARGING (see above) mode may be used to assess the battery

Completing a Battery Test

Battery Tester Results Table

Flooded Battery Care Point

If the vehicle is equipped with a flooded battery, ensure the replacement battery is a flooded battery of the same specification (cold cranking amperage (CCA), battery standard (EN/SAE) / amp hour rating (Ah)) as the original battery Under no circumstances should you fit a flooded battery to a vehicle that originally had an AGM battery, unless formally instructed by Jaguar/Land Rover

AGM Battery Care Point

If the vehicle is equipped with an absorbed glass mat (AGM) battery, ensure the replacement battery is a AGM battery of the same specification (cold cranking amperage (CCA), battery standard (EN/SAE) / amp hour rating (Ah)) as the original battery, unless formally instructed by Jaguar/Land Rover

DTC INDEX

For a list of Diagnostic Trouble Codes (DTCs) that could be logged on this vehicle, please refer to Section 100-00

Battery tray (G1774741) removal and installation

REMOVAL

NOTES:

• Removal steps in this procedure may contain installation details.
• Some variation in the illustrations may occur, but the essential information is always correct.

Refer to: Battery (414-01, Removal and Installation).

Torque: 10 Nm

NOTE:

Do not disassemble further if the component is removed for access only.

INSTALLATION

To install, reverse the removal procedure.

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