Specifications
| Description | Nm |
|---|---|
| Camshaft position sensor retaining bolt | 9 |
| Crankshaft position sensor retaining bolt | 7 |
| Cylinder head temperature sensor | 10 |
| Power steering pump belt cover retaining nut | 10 |
| Engine oil pressure sensor | 15 |
| Fuel temperature sensor | 15 |
| Knock sensor | 20 |
| Fuel injection supply manifold high pressure pipe retaining nut | 10 |
| Manifold absolute pressure and temperature sensor retaining clips | 4 |
| Radiator support bar retaining bolts | 25 |
| Charge air cooler upper hose retaining clip | 4 |
| Charge air cooler lower hose retaining clip | 4 |
Torque Specifications
Scheme 33
| Item Number | Description |
|---|---|
| 1 | Camshaft position (CMP) sensor |
| 2 | Engine control module (ECM) |
| 3 | Cylinder head temperature (CHT) sensor |
| 4 | Crankshaft position (CKP) sensor |
| 5 | Mass airflow (MAF) sensor |
| 6 | Fuel temperature sensor |
| 7 | Engine oil pressure (EOP) sensor |
| 8 | Knock (KS) sensor |
| 9 | Manifold absolute pressure and temperature (MAP-T) sensor |
Camshaft Position (CMP) Sensor
The camshaft position (CMP) sensor is located on the front of the cylinder head and it is a hall effect type sensor. The CMP sensor takes its signal from the inlet camshaft lobe. The signal is used to identify cylinder number three and thus allowing the individual cylinders to be identified. Should the CMP sensor fail the engine will not start.
Engine Control Module (ECM)
The engine control module (ECM) is located in the same position as the petrol version. The engine management system (EMS) uses signals from the various sensors as inputs to the ECM which contains a series of maps for the engine parameters. Based on the inputs from the sensors regarding current engine conditions and loads, the ECM determines the optimum settings to use for the EMS, and so gives the best performance and/or economy for a given set of conditions. The ECM also manages the speed control system, again based on information from the vehicle sensors to provide the optimum settings.
Cylinder Head Temperature (CHT) Sensor
The cylinder head temperature (CHT) sensor is located at the rear of the engine behind the rear end accessory drive camshaft pulley. The CHT sensor measures the temperature of the cylinder head and then provides the ECM and the instrument cluster with the engine temperature.
Crankshaft Position (CKP) Sensor
The crankshaft position (CKP) sensor is located at the rear of the engine mounted to the cylinder block. It is used to detect the engine position and speed of the crankshaft. It is a permanent inductive type sensor. Should the CKP sensor fail, the engine will not start.
Mass Airflow (MAF) Sensor
The mass airflow (MAF) sensor is mounted on the clean air side of the air filter and upstream of the turbocharger air compressor. The function of the MAF sensor is to measure the amount of air flow drawn into the engine. This airflow is used by the ECM to control the exhaust gas recirculation (EGR) operation.
Engine Oil Pressure (EOP) Sensor
The engine oil pressure (EOP) sensor is located on the left-hand side of the engine in the oil filter housing. The EOP is connected to the instrument cluster and is not directly part of the electronic engine control system.
Knock Sensor (KS)
The knock sensor (KS) is located on the left-hand side of the engine mounted on the cylinder head between cylinders two and three. The KS allows the ECM to analyze the quality of combustion by measuring the increase in vibration. The ECM will use this signal to calculate the quantity of fuel to be injected during phased injection. The correction to the fueling for the phased injection minimizes the combustion noise. Should the KS fail the result would be no phased injection and thus an increase in diesel knock when idling and accelerating.
Manifold Absolute Pressure and Temperature (MAP-T) Sensor
The manifold absolute pressure and temperature (MAP-T) sensor combines the manifold pressure sensor and inlet air temperature sensor in one component. It is located in the inlet boost pressure pipe, right side front after the charge air cooler. Its function and operation is to measure the positive charge pressure developed by the turbocharger and its temperature, and to inform the ECM.
Fuel Temperature Sensor
The fuel temperature sensor can be identified by a blue connector located in the low pressure fuel supply circuit on the back of the high pressure pump. The fuel temperature sensor is a negative thermal coefficient type sensor which measures the fuel temperature in the low pressure circuit. Should the fuel temperature sensor fail the cold running characteristic will be affected.
See also:
• Lifting