Home ReviewsRefund
Home/Jaguar/XKR/Jaguar XKR II (2006-2008)/Repair manual/Engine Control Systems/Engine Emission Control (Without Supercharger): Diagnosis
Contents Wiring diagrams Section: Engine Control Systems All sections

Engine Emission Control (Without Supercharger): Diagnosis Jaguar XKR II

Engine Control Systems 4 illustrations ~366 words

Inspection and Verification

  1. Verify the customer concern.
  2. Visually inspect for obvious signs of damage and system integrity. Visual Inspection Mechanical Electrical Engine breather hoses Cyclone separator Exhaust gas recirculation (EGR) pipes (check for cracks) EGR valve Fuses Wiring harness Loose or corroded electrical connectors Sensor(s) Stepper motor(s) Secondary air injection (AIR) pump Secondary air injection (AIR) valve Engine control module (ECM)
  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 customer concern and refer to «Symptom Chart»(ref-312584-S28696038662009041400000) below, alternatively, check for Diagnostic Trouble Codes (DTCs) and refer to «DTC Index»(ref-312584-S22403642612009041400000) .

Symptom Chart

SymptomPossible CauseAction
Engine cranks, but does not fireEngine breather system disconnected/restrictedEnsure the engine breather system is free from restriction and is correctly installed
Difficult to start coldExhaust gas recirculation (EGR) valve stuck openRead DTCs and refer to DTC Index for EGR valve tests
Engine stalls soon after startBreather system disconnected/restrictedEnsure the engine breather system is free from restriction and is correctly installed
Engine stops/stallsEGR valve stuck openRead DTCs and refer to DTC Index for EGR valve tests
Poor idle qualityEGR valve stuck openRead DTCs and refer to DTC Index for EGR valve tests
Engine hesitates/poor accelerationEGR valve stuck openRead DTCs and refer to DTC Index for EGR valve tests
Poor throttle responseBreather system disconnected/restrictedEnsure the engine breather system is free from restriction and is correctly installed
Excessive fuel consumption Excessive black smoke Excessive emissionsEGR valve stuck open EGR system not operating Engine breather system restrictedRead DTCs and refer to DTC Index for EGR system tests Ensure the engine breather system is free from restriction and is correctly installed
Loud 'ticking' noise with engine runningEGR pipes crackedInspect the EGR pipes, paying particular attention to the ribbed sections. Replace as necessary
Engine oil leaksEngine breather system restrictedEnsure the engine breather system is free from restriction and is correctly installed

DTC Index

CAUTIONWhen probing connectors to take measurements in the course of the pinpoint tests, use the adaptor kit, part number 3548-1358-00.

Note. 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 extra information read by the manufacturer-approved diagnostic system).

Note. When performing electrical voltage or resistance tests, always use a digital multimeter (DMM) accurate to three decimal places, and with an up-to-date calibration certificate. When testing resistance, always take the resistance of the DMM leads into account.

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

Note. If DTCs are recorded and, after the pinpoint tests have been carried out, the fault is not present, an intermittent concern may be the cause. Always check for loose connections and corroded terminals.

DTCDescriptionPossible CausesAction
P040100EGR flow insufficientEGR valve incorrectly installed or loose EGR valve stuck closed, blocked EGR valve mechanical failure EGR pipe blockedCheck the installation and for restriction/mechanical failure of the EGR valve. See Exhaust Gas Recirculation (EGR) Valve . Check the EGR pipe work for restriction
P041300Secondary Air Injection (AIR) switching valve circuit openAIR check valve control circuit highCarry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system
P041400Secondary Air Injection (AIR) switching valve circuit shortedAIR check valve control circuit lowCarry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system
P048900Exhaust Gas Recirculation (EGR) control circuit lowEGR valve power supply circuit - short to ground, high resistanceCarry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system
P049000Exhaust Gas Recirculation (EGR) control circuit highEGR valve control circuit - short to powerCarry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system
P243100Secondary air injection manifold absolute pressure sensor circuit range/performanceSecondary air injection system leaks Secondary air injection pump Secondary air injection valveCheck the secondary air injection system for leaks Carry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system
P243200Secondary air injection manifold absolute pressure sensor circuit lowSecondary air injection manifold absolute pressure sensor circuit - short to ground, high resistanceCarry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system
P243300Secondary air injection manifold absolute pressure sensor circuit highSecondary air injection manifold pressure (MAP) sensor circuit - short to powerCarry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system
P244400Secondary air injection system pump stuck ONSecondary air injection pump control circuit - short to groundCarry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system
P244500Secondary air injection system pump stuck OFFSecondary air injection pump control circuit - short to powerCarry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system

Scheme 107

Scheme 107: Removal
Scheme 107: Removal

Scheme 108

Scheme 108
Scheme 108

Scheme 109

Scheme 109
Scheme 109

Scheme 110

Scheme 110
Scheme 110
  1. Remove the cover and disconnect the battery ground cable. Refer to «Specifications»(ref-312564-S31890761012009041400000) article.
  2. Remove the engine cover. Refer to «Engine Cover»(ref-312547-S27687687872009041400000) article.
  3. Disconnect the EGR valve electrical connector.
  4. Disconnect the 2 EGR valve coolant hoses. Clamp the EGR coolant hoses to minimize coolant loss. Release the 2 clips.
  5. Release the EGR valve to exhaust manifold pipe. Remove the 2 nuts. Remove and discard the gasket.
  6. Release the EGR valve from the throttle body elbow. Remove the 2 bolts. Remove and discard the gasket.
  7. Remove the EGR valve. Remove the 2 bolts. Remove and discard the gasket.

More articles — Engine Emission Control (Without Supercharger)