Land Rover Lesson 2 Auto Trans Coolingine Rover Manual
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ECM ADAPTIONS The ECM has the ability to adapt the values it uses to control certain outputs. This capability ensures the EMS can meet emissions legislation and improve the refinement of the engine throughout its operating range. The components which have adaptions associated with them are: •The APP sensor •The HO2S •The MAF/IAT sensor •The CKP sensor •Electric throttle body. UHEGO/HEGO and MAF/IAT Sensor There are several adaptive maps associated with the fuelling strategy. Within the fuelling strategy the ECM calculates short-term adaptions and long term adaptions. The ECM will monitor the deterioration of the oxygen sensors (HEGO and UHEGO) over a period of time. It will also monitor the current correction associated with the sensors. The ECM will store a fault code in circumstances where an adaption is forced to exceed its operating parameters. At the same time, the ECM will record the engine speed, engine load and intake air temperature. CKP Sensor The characteristics of the signal supplied by the CKP sensor are learned by the ECM. This enables the ECM to set an adaption and support the engine misfire detection function. Due to the small variation between different flywheels and different CKP sensors, the adaption must be reset if either component is renewed, or removed and refitted. It is also necessary to reset the flywheel adaption if the ECM is renewed or replaced. The ECM supports four flywheel adaptions for the CKP sensor. Each adaption relates to a specific engine speed range. The engine speed ranges are detailed in the table below: Engine Speed, rev/minAdaptions 1800 - 30001 3001 - 38002 3801 - 46003 4601 - 54004 Misfire Detection Legislation requires that the ECM must be able to detect the presence of an engine misfire. It must be able to detect misfires at two separate levels. The first level is a misfire that could lead to the vehicle emissions exceeding 1.5 times the Federal Test Procedure (FTP) requirements for the engine. The second level is a misfire that may cause catalyst damage. The ECM monitors the number of misfire occurrences within two engine speed ranges. If the ECM detects more than a predetermined number of misfire occurrences within either of these two ranges, over two consecutive journeys, the ECM will record a fault code and details of the engine speed, engine load and engine coolant temperature. In addition, the ECM monitors the number of misfire occurrences that happen in a window of 200 engine revolutions. The misfire occurrences are assigned a weighting according to their likely impact on the catalysts. If the number of misfires exceeds a certain value, the ECM stores catalyst-damaging fault codes, along with the engine speed, engine load and engine coolant temperature. The signal from the crankshaft position sensor indicates how fast the poles on the flywheel are passing the sensor tip. A sine wave is generated each time a pole passes the sensor tip. The ECM can detect variations in flywheel speed by monitoring the sine wave signal supplied by the crankshaft position sensor. Electronic Engine ControlsLesson 2 – Powertrain 207Technical Training (G421151)
By assessing this signal, the ECM can detect the presence of an engine misfire. At this time, the ECM will assess the amount of variation in the signal received from the crankshaft position sensor and assigns a roughness value to it. This roughness value can be viewed within the real time monitoring feature, using T4. The ECM will evaluate the signal against a number of factors and will decide whether to count the occurrence or ignore it. The ECM can assign a roughness and misfire signal for each cylinder, (i.e. identify which cylinder is misfiring). T4 Diagnostics The ECM stores faults as Diagnostic Trouble Codes (DTC), referred to as P codes. The P codes are defined by OBD legislation and, together with their associated environmental and freeze frame data, can be read using a third party scan tool or T4. T4 can also read real time data from each sensor, the adaptive values currently being employed and the current fuelling, ignition and idle settings. Fault DescriptionComponent/SignalP Code No Bank A CMP/CKP Position error high , VVT retard position high CMP/CKP/VVTP0011 Bank A CMP/CKP Position error low, VVT retard position low CMP/CKP/VVTP0012 Bank B CMP/CKP Position error, VVT retard position high CMP/CKP/VVTP0021 Bank B CMP/CKP Position error low , VVT retard position low CMP/CKP/VVTP0022 Bank A circuit malfunction range high/low VVTP0026 Bank B circuit malfunction range high/low VVTP0028 Bank A heater control circuit lowUHEGOP0031 Bank A heater control circuit highUHEGOP0032 Bank B heater control circuit lowUHEGOP0051 Bank B heater control circuit highUHEGOP0052 Sensor circuit/range performanceHACP0069 Range performanceAmbient air temperature sensorP0071 Circuit low inputAmbient air temperature sensorP0072 Circuit high inputAmbient air temperature sensorP0073 Bank A open circuitVVTP0075 (G421151) Technical Training208 Lesson 2 – PowertrainElectronic Engine Controls
Fault DescriptionComponent/SignalP Code No Bank A short to groundVVTP0076 Bank A short to batteryVVTP0077 Bank B open circuitVVTP0081 Bank B short to groundVVTP0082 Bank B short to batteryVVTP0083 Low faultFuel pressure systemP0087 High faultFuel pressure systemP0088 Noise faultFuel pressure systemP0089 Large leakFuel pressure systemP0093 Sensor range performanceIATP0096 Circuit range performanceAFMP0101 Circuit low inputAFMP102 Circuit high inputAFMP103 Sensor range performanceMAPP0106 Circuit low inputMAPP0107 Circuit high inputMAPP0108 Stuck high/low at engine start, stuck high IATP0111 Sensor 1 circuit low inputIATP0112 Sensor 1 circuit high inputIATP0113 Implausible signalECTP0116 Circuit low inputECTP0117 Circuit high inputECTP0118 Range/performanceThrottle circuit 1 and 2P0121 Low inputThrottle circuit 1P0122 High inputThrottle circuit 1P0123 Insufficient coolant temperature for closed loop control ECTP0125 Electronic Engine ControlsLesson 2 – Powertrain 209Technical Training (G421151)
Fault DescriptionComponent/SignalP Code No Low coolant temperature – thermo- stat stuck open Thermostat monitorP0128 Bank A short circuit to groundUHEGOP0131 Bank A Short circuit to batteryUHEGOP0132 Bank A slow responseUHEGOP0133 Bank A adaptionsHEGOP0136 Bank A short circuit to groundHEGOP0137 Bank A short circuit to batteryHEGOP0138 Bank A slow responseHEGOP0139 Bank A no activityHEGOP0140 Bank A heater control circuit malfunction HEGOP0141 Bank B short circuit to groundUHEGOP0151 Bank B short circuit to batteryUHEGOP0152 Bank B slow responseUHEGOP0153 Bank B adaptionsHEGOP0156 Bank B short circuit to groundHEGOP0157 Bank B short circuit to batteryHEGOP0158 Bank B slow responseHEGOP0159 Bank B no activityHEGOP0160 Bank B heater control circuit malfunction HEGOP0161 Bank A too leanlambda controlP00171 Bank A too richlambda controlP0172 Bank B too leanlambda controlP0174 Bank B too richlambda controlP0175 Temperature signal implausibleFuel rail temperature sensorP0181 Circuit low inputFuel rail temperature sensorP0182 Circuit high inputFuel rail temperature sensorP0183 (G421151) Technical Training210 Lesson 2 – PowertrainElectronic Engine Controls
Fault DescriptionComponent/SignalP Code No Range /performanceFuel rail pressure sensorP0191 Low InputFuel Rail Pressure SensorP0192 High InputFuel Rail Pressure SensorP0193 Range/performanceOil temperature sensorP0196 Low inputOil temperature sensorP0197 High inputOil temperature sensorP0198 Malfunction - Cylinder 1Injector CircuitP0201 Malfunction - Cylinder 2Injector CircuitP0202 Malfunction - Cylinder 3Injector CircuitP0203 Malfunction - Cylinder 4Injector CircuitP0204 Malfunction - Cylinder 5Injector CircuitP0205 Malfunction - Cylinder 6Injector CircuitP0206 Malfunction - Cylinder 7Injector CircuitP0207 Malfunction - Cylinder 8Injector CircuitP0208 Low inputAPP sensor 2P0222 High inputAPP sensor 2P0223 Low inputAPP sensor 1P0227 High inputAPP sensor 1P0228 Intermittent faultAPP sensorP0229 Vehicle over speed conditionActive speed controlP0297 Random/multiple cylinder misfireMisfireP0300 Cylinder 1MisfireP0301 Cylinder 2MisfireP0302 Cylinder 3MisfireP0303 Cylinder 4MisfireP0304 Cylinder 5MisfireP0305 Cylinder 6MisfireP0306 Cylinder 7MisfireP0307 Electronic Engine ControlsLesson 2 – Powertrain 211Technical Training (G421151)
Fault DescriptionComponent/SignalP Code No Cylinder 8MisfireP0308 Misfire under low fuel conditionMisfireP0313 Misfire detected in first 1000 revsMisfireP0316 Sensor 1 high/low performance errorKnock sensorP0326 Bank A sensor low input faultKnock sensorP0327 Bank A high input faultKnock sensorP0328 Sensor 2 high/low performance errorKnock sensorP0331 Bank B sensor low input faultKnock sensorP0332 Bank A high input faultKnock sensorP0333 Sensor circuit malfunction during crank/running Crank sensorP0335 Range/performance faultCrank sensorP0336 Fault during cranking/runningIntake CMP sensor bank AP0340 Range/performance faultIntake CMP sensor bank AP0341 Fault during cranking/runningIntake CMP sensor bank BP0345 Range/performance faultIntake CMP sensor bank BP0346 Circuit malfunction cylinder 1Ignition coilP0351 Circuit malfunction cylinder 2Ignition coilP0352 Circuit malfunction cylinder 3Ignition coilP0353 Circuit malfunction cylinder 4Ignition coilP0354 Circuit malfunction cylinder 5Ignition coilP0355 Circuit malfunction cylinder 6Ignition coilP0356 Circuit malfunction cylinder 7Ignition coilP0357 Circuit malfunction cylinder 8Ignition coilP0358 Fault during cranking/runningExhaust CMP sensor bank AP0365 Range/performance faultExhaust CMP sensor bank AP0366 Fault during cranking/runningExhaust CMP sensor bank BP0390 Range/performance faultExhaust CMP sensor bank BP0391 (G421151) Technical Training212 Lesson 2 – PowertrainElectronic Engine Controls
Fault DescriptionComponent/SignalP Code No Insufficient flow detectedEGR systemP0401 Valve circuit high/low inputEGR systemP0403 Short to groundDifferential pressure sensor sensorP0405 Short to batteryDifferential pressure sensor sensorP0406 Range performanceDifferential pressure sensor sensorP0409 Efficiency below thresholdCatalyst system bank AP0420 Efficiency below thresholdCatalyst system bankP0430 Range performancePurge valveP0441 Medium leak detectedDMTLP0442 Short to groundDMTLP0447 Short to batteryDMTLP0448 Large leak detectedDMTLP0455 Small leak detectedDMTLP0456 Short to groundPurge valveP0458 Short to batteryPurge valveP0459 Range/performance faultFuel level sensorP0461 Control circuit malfunctionRadiator fan moduleP0480 Speed Out of rangeViscous fanP0493 Range/performance malfunctionVehicle speedP0501 Circuit malfunctionBrake switchP0504 RPM lower than expectedIdle control systemP0506 RPM lower than expectedIdle control systemP0507 High/low inputCrank request circuitP0512 Key invalidSecurity keyP0513 Low inputAir conditioning refrigerant pressure sensor P0532 High inputAir conditioning refrigerant pressure sensor P0533 Electronic Engine ControlsLesson 2 – Powertrain 213Technical Training (G421151)
Fault DescriptionComponent/SignalP Code No MalfunctionBattery back upP0560 Low inputSensor power supplyP0562 High inputSensor power supplyP0563 ON faultCruise control cancel switchP0566 ON faultCruise control resume switchP0567 Low/high inputCruise controlP0568 ON faultDecelerate/set/inch switchP0569 On faultAccelerate/set/inch switchP0570 Speed monitoringCruise controlP0574 Low inputCruise controlP0576 High inputCruise controlP0577 RAM errorECM self testP0604 ROM errorECM self testP0605 Processor errorECM self testP0606 Low inputStarter relayP0616 High inputStarter relayP0617 No commands receivedPrimary fuel pumpP0627 Electrical lowFuel pumpP0628 Electrical highFuel pumpP0629 No ID in ECMSecurityP0633 Internal temperature too highECM temperatureP0634 Low inputAir conditioning clutch relayP0646 High inputAir conditioning clutch relayP0647 Open circuit or short circuit to groundManifold valve output drive 1P0661 Short circuit to batteryManifold valve output drive 1P0662 Open circuit or short circuit to groundManifold valve output drive 2P0664 Short circuit to batteryManifold valve output drive 2P0665 Short to groundECM temperature sensorP0668 (G421151) Technical Training214 Lesson 2 – PowertrainElectronic Engine Controls
Fault DescriptionComponent/SignalP Code No Short to batteryECM temperature sensorP0669 Relay malfunctionEMS control relayP0687 Low inputClutch switch circuit AP0831 High inputClutch switch circuit AP0832 Low inputClutch switch circuit BP0834 High inputClutch switch circuit BP0835 Input Circuit LowPark /Neutral SwitchP0851 Input Circuit HighPark /Neutral SwitchP0852 Fan malfunctionE Box fanP1136 Low input/communication errorGenerator command lineP1146 Heater performanceHEGO Heater bank AP1155 Slow activationUHEGO Bank AP1160 Slow activation/open shortedUHEGO Bank AP1197 Slow activation/open shortedUHEGO Bank BP1198 Output circuit openSecondary fuel pumpP1233 No commands receivedPrimary fuel pumpP1234 Pump not working when requestedPrimary fuel pumpP1236 High inputAlternator command lineP1244 Theft attemptSecurity limited startP1260 Driver circuit output low/highSecondary fuel pumpP1339 Reference current too lowDMTLP1452 Reference current too highDMTLP1453 LowDMTL heater control circuitP1482 HighDMTL heater control circuitP1483 Data storedFlight recorderP1582 ID transfer process failedSecurity IDP1624 FR line failureGeneratorP1629 Charge system failureGeneratorP1632 Electronic Engine ControlsLesson 2 – Powertrain 215Technical Training (G421151)
Fault DescriptionComponent/SignalP Code No Slow activation/control module open shorted UHEGO sensor bank AP1646 Slow activation/control module open shorted UHEGO sensor bank BP1647 Malfunction lowE Box fanP1670 Malfunction highE Box fanP1671 Shorter/Longer switch ON faultCruise controlP1697 plausibility checkLow gear ratioP1700 Range checkSecondary fuel pumpP2066 Performance check stuck open/closedManifold valve output drive 1P2070 Performance check stuck open/closedManifold valve output drive 2P2071 Range performanceElectric throttleP2101 Throttle duty at 100% continuouslyElectric throttleP2103 MIL request duel fuel cut offElectric throttleP2105 Reconfiguration failureIntended reduced availabilityP2106 Over current detection by hardwareElectric throttle systemP2118 Throttle stuck openElectric throttleP2119 Circuit 2 low inputAPP sensorP2122 Circuit 2 high inputAPP sensorP2123 Circuit lowHAC sensorP2228 Circuit highHAC sensorP2229 Brake overrideAccelerator pedalP2299 Ground shortDMTL PumpP2401 Battery shortDMTL PumpP2402 Noise/reference leak faultDMTL PumpP2404 COV stuck openDMTLP2450 COV stuck closedDMTLP2451 Voltage lowCharging systemP2503 (G421151) Technical Training216 Lesson 2 – PowertrainElectronic Engine Controls