Land Rover Defender: Speakers

DIAGNOSIS AND TESTING

PRINCIPLES OF OPERATION

For a detailed description and operation of the information and entertainment system, refer to the relevant description and operation section of the workshop manual.

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:

• If the control module or a component is at fault or may be at fault and the vehicle remains under manufacturer warranty, refer to the Warranty Policy and Procedures manual, or determine if any prior approval program is in operation, prior to the installation of a new module/component.
• When performing voltage or resistance tests, always use a digital multimeter accurate to three decimal places, and with an up-to-date calibration certificate. When testing resistance always take the resistance of the digital multimeter leads into account.
• All diagnostic equipment should comply with local legislation.
• Relevant diagnostic equipment should be regularly checked and calibrated according to the manufacturer's instructions.
• The workshop should be equipped with a full range of general equipment which is to be kept in good order and available to all suitably trained staff.
• Diagnostic equipment must meet the JLR Minimum Standards for general equipment as outlined in TOPIx.
• Check and rectify basic faults before beginning diagnostic routines involving pinpoint tests.

1. Verify the customer concern
2. Visually inspect for obvious signs of damage and system integrity

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, verify the symptom and refer to the Symptom Chart, alternatively check for Diagnostic Trouble Codes (DTCs) and refer to the DTC Index
5. Check the Jaguar Land Rover claims submission system for open campaigns. Refer to the corresponding bulletins and SSMs which may be valid for the specific customer complaint and complete the recommendations as required

SPEAKER DIAGNOSTICS

The symptom chart below should be used when diagnosing speaker faults and must be worked through prior to replacing any speakers

PINPOINT TESTS FOR SUSPECTED SPEAKER FAULTS

NOTE: See separate Pinpoint Tests (below) for sub-woofer faults

PINPOINT TEST A : NO SOUND OUTPUT FROM SPEAKER(S)

PINPOINT TEST B : POOR OR WEAK SOUND OUTPUT FROM SPEAKER(S)

PINPOINT TEST C : SPEAKER VIBRATING (BUZZING) EXCESSIVELY

Pinpoint Tests For Suspected Sub-Woofer Faults

The pinpoint tests found below are for sub-woofer speakers only.

NOTE: See separate Pinpoint Tests (above) for other speaker faults

PINPOINT TEST D : NO SOUND OUTPUT FROM SUB-WOOFER

PINPOINT TEST E : POOR OR WEAK SOUND OUTPUT FROM SUB-WOOFER(S)

PINPOINT TEST F : SUB-WOOFER VIBRATING (BUZZING) EXCESSIVELY

PINPOINT TEST G : SUB-WOOFER AUDIO OUTPUT DISTORTED

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