Land Rover Discovery: Starting System - Ingenium i4 2.0l Diesel / Diagnosis and Testing

PRINCIPLES OF OPERATION

For a detailed description of the Starting System, refer to the relevant Description and Operation section in the workshop manual. REFER to: Starting System (303-06C Starting System - GTDi 2.0L Petrol/GTDi 2.0L Petrol - SULEV, 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 tested and/or the donor vehicle.

NOTES:

• 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 accurate to three decimal places, and with an up-todate calibration certificate. 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

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 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

SYMPTOM CHART

SYMPTOM:

The engine does not crank (starter motor does not turn)

POSSIBLE CAUSES:

• Battery/charging system fault
• Engine system fault
• Transmission fault
• Transmission control switch not set to Park or Neutral
• Smart key not present/recognised
• Starter relay circuit open circuit, high resistance
• Starter motor ground circuit open circuit, high resistance
• Starter motor solenoid power circuit short circuit to ground, open circuit, high resistance
• Starter motor power circuit short circuit to ground, open circuit, high resistance
• Engine seized

ACTION:

• Refer to the relevant section of the workshop manual and check the battery and charging system. Rectify as necessary
• Using the Jaguar Land Rover approved diagnostic equipment, check the powertrain control module for related DTCs and refer to the relevant DTC index
• Using the Jaguar Land Rover approved diagnostic equipment, check the transmission control module for related DTCs and refer to the relevant DTC index
• Set the transmission control switch to Park or Neutral and retest
• Check that the smart key is present and recognised
• Refer to the electrical circuit diagrams and check the starter relay circuit for open circuit, high resistance. Repair the wiring harness or install a new starter relay as necessary
• Refer to the electrical circuit diagrams and check the starter motor ground circuit for open circuit, high resistance. Repair the wiring harness as necessary
• Refer to the electrical circuit diagrams and check the starter motor solenoid power circuit for short circuit to ground, open circuit, high resistance. Repair the wiring harness or install a new starter motor solenoid as necessary Refer to the electrical circuit diagrams and check the starter motor power circuit for short circuit to ground, open circuit, high resistance.
• Repair the wiring harness or install a new starter motor as necessary
• Check that the engine turns freely. Rectify as necessary

SYMPTOM:

The engine does not crank (starter motor does turn)

POSSIBLE CAUSES:

• Starter motor incorrectly installed
• Starter motor internal failure
• Flywheel / drive plate ring gear damaged

ACTION:

• Check the installation of the starter motor.

  Rectify as necessary

• Check the operation of the starter motor.

  Rectify as necessary

• Check the flywheel / drive plate ring gear teeth for damage, foreign objects, etc. Rectify as necessary

SYMPTOM:

Engine cranks too slowly

POSSIBLE CAUSES:

• Battery/charging system fault
• Starter motor ground circuit open circuit, high resistance
• Starter motor power circuit open circuit, high resistance
• Starter motor internal failure
• Engine oil grade incorrect

ACTION:

• Refer to the relevant section of the workshop manual and check the battery and charging system. Rectify as necessary
• Refer to the electrical circuit diagrams and check the starter motor ground circuit for open circuit, high resistance. Repair the wiring harness as necessary
• Refer to the electrical circuit diagrams and check the starter motor power circuit for open circuit, high resistance. Repair the wiring harness as necessary
• Check the operation of the starter motor.

  Rectify as necessary

• Check the engine oil grade. Rectify as necessary

SYMPTOM:

Starter motor excessively noisy

POSSIBLE CAUSES:

• Starter motor incorrectly installed
• Starter motor internal failure
• Flywheel / drive plate ring gear damaged

ACTION:

• Check the installation of the starter motor.

  Rectify as necessary

• Check the operation of the starter motor.

  Rectify as necessary

• Check the flywheel / drive plate ring gear teeth for damage, foreign objects, etc. Rectify as necessary

SYMPTOM:

Auto stop/start system inoperative

POSSIBLE CAUSES:

• Auto stop/start system inhibited

• Driver error/expectation
• Recent DTC clear
• System fault

• Auto stop/start system fault

ACTION:

NOTE:

'AUTO STOP/START FAULT' will be displayed in the instrument cluster message centre when the system is inoperative due to a fault.

• Refer to the Auto Stop/Start System Inhibits table for possible inhibit conditions

• Auto stop/start system inhibited due to driver error/expectation: Explain/demonstrate the auto stop/start system to the driver
• Auto stop/start system inhibited due to a recent DTC clear (and a drive cycle not completed): Road test the vehicle at a speed of 48 to 80 km/h (30 to 50 mph) for 2 to 3 minutes, allow the engine to idle, auto stop/start will now activate
• Auto stop/start system inhibited due to battery condition: Using the Jaguar Land Rover approved diagnostic equipment, perform routine - Power Supply Service Mode Diagnostic Routine

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

AUTO STOP/ START SYSTEM INHIBITS

The inhibit conditions listed below will not set Diagnostic Trouble Codes (DTCs) but will set flags which can be viewed using the Jaguar Land Rover approved diagnostic equipment - Datalogger / Powertrain Control Module (PCM). Normal auto stop/start system operation will resume when an inhibit condition is no longer present, but the battery related inhibits may persist for some time.

NOTE:

Do not reset the Battery Monitoring System (BMS) to rectify battery condition inhibits. This may temporarily restore auto stop/start system operation but will lead to a recurrence of the fault.

INHIBITS

• Auto stop/start switch has been pressed by driver
• Transmission not in neutral
• Clutch pedal not fully released
• Accelerator pedal not released
• Hood open detected
• Driver door detected open
• Driver seatbelt not fastened
• Hill Descent Control (HDC) is switched on
• Terrain response special programme selected
• Climate control demand exceeds calibrated threshold
• Heated windshield operating
• Trailer connected
• Brake booster vacuum below threshold
• Engine coolant temperature below threshold
• Engine oil temperature below threshold
• Catalytic converter outside either pre or post calibration range
• Diesel Particulate Filter (DPF) active regeneration in progress
• Battery state of charge low
• Battery cold cranking capability below threshold
• Ambient temperature above 40ºC
• Ambient temperature below 0ºC

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 - INGENIUM I4 2.0L Diesel, DTC: Engine Control Module (ECM) B10A2-07 to P034B-76 (100-00 General Information, Description and Operation).

Starting System - Ingenium i4 2.0l Diesel / Specifications

Torque Specifications

Vehicles Without Auto Stop / Start SystemExhaust System

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