Land Rover Discovery Owners & Service Manuals

Land Rover Discovery: External Controls / Diagnosis and Testing


For a detailed description of the Automatic Transmission External Controls, refer to the relevant Description and Operation section in the workshop manual. REFER to: External Controls (307-05 Automatic Transmission/Transaxle External Controls, Description and Operation).



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 tested and/or the donor vehicle.


  • If a control module or a component is suspect and the vehicle remains under manufacturer warranty, refer to the Warranty Policy and Procedures manual, or determine if any prior approval programme is in operation, prior to the installation of a new module/component.
  • 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.
  1. Verify the customer concern
  2. Visually inspect for obvious signs of damage and system integrity

Visual Inspection

Visual Inspection

  1. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step
  2. 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
  3. 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




Transmission control switch inoperative


  • Transmission control switch system fault


  • Using the Jaguar Land Rover approved diagnostic equipment, check the transmission control switch for related DTCs and refer to the relevant DTC index


For a list of Diagnostic Trouble Codes (DTCs) that could be logged on this vehicle, please refer to Section 100-00. REFER to: Diagnostic Trouble Code Index - DTC: Transmission Control Switch (TCS) (100-00 General Information, Description and Operation).

External Controls Specifications

General Specification

General Specification

Torque Specifications

Torque Specifications


     Automatic Transmission  Transaxle / Description and operation

    COMPONENT LOCATION Paddle switches - upshift / downshift Transmission Control Switch (TCS) Transmission Control Module (TCM) ZF 9HP48 Automatic transmission Automatic Transmission Fluid (ATF)

     Automatic Transmission  Transaxle / Component Description

    The transmission comprises the main casing which houses all of the transmission components. The torque converter is located in a separate converter housing, bolted to the main casing. ZF 9HP48 Cut-Awa

     Valve Block

    The valve block is located in a vertical position at the front of the transmission main casing, behind a sealed cover. The valve block contains a number of solenoids and spool valves to control the t


     Spring and Shock Absorber

    NOTE: Adaptive dynamics damper shown, standard damper similar. Bolt - shock absorber to wheel knuckle Shock absorber Nut - Shock absorber top mounting to body fastener Nut - shock absorber to top mounting. Spring isolator Spring Nut - shock absorber to wheel knuckle Spring The coil spring

     Rear Disc Brake Brake Caliper Anchor Plate (G1785111) / Removal and Installation

    PART(S) REMOVAL NOTE: Removal steps in this procedure may contain installation details. Connect the diagnostic tool and set the electronic park brake (EPB) to the maintenance position NOTE: This step is only required if the diagnostic tool is not available. Refer to: Electronic Parking Brake

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