Ford Sierra Manual

EEC IV system components - removal and refitting
Engine electrical systems / EEC IV system components - removal and refitting


Note: Procedures for removal and refitting of the ignition system components and electronic module are given elsewhere in the relevant Sections of this Chapter.

Engine coolant temperature sensor
2.0 litre SOHC fuel injection models 1 For details of engine coolant temperature sensor removal and refitting, refer to the Section appertaining to the ESC II system.

1.6 and 1.8 litre (R6A type) CVH models 2 The sensor is located in the side of the inlet manifold.

3 Disconnect the battery negative lead.

4 Partially drain the cooling system.

5 Disconnect the sensor wiring plug by pulling on the plug, not the wiring (see illustration).

21.5 Disconnecting the engine coolant temperature sensor wiring plug
21.5 Disconnecting the engine coolant temperature sensor wiring plug

6 Unscrew the sensor from the inlet manifold and remove it.

7 Refitting is a reversal of removal. Refill the cooling system.

2.0 litre DOHC fuel injection models 8 The sensor is located in the side of the inlet manifold, behind the throttle body. The removal and refitting procedure is as described for the 1.6 and 1.8 litre (R6A type) CVH models above.

Crankshaft speed/position sensor 1.6 and 1.8 litre (R6A type) CVH models
1.6 litre
9 The sensor is located at the left-hand rear of the cylinder block, above the starter motor (see illustration).

21.9 Crankshaft speed/position sensor (arrowed) viewed from front of engine
21.9 Crankshaft speed/position sensor (arrowed) viewed from front of engine with shroud removed

10 Disconnect the battery negative lead.

11 Remove the securing screw, and withdraw the sensor shroud.

12 Disconnect the sensor wiring plug.

13 Remove the Torx securing screw, and withdraw the sensor.

14 Refitting is a reversal of removal.

1.8 litre
15 Proceed as described for the ESC Hybrid module. If a new sensor (not the original unit) is being fitted, position it in the mounting bracket so that it is in actual contact with one of the teeth of the toothed wheel on the crankshaft. Hold the sensor in this position, and tighten the clamping screw. New sensors have projections on their base, which will wear away when the engine is cranking, and automatically set the specified clearance.

2.0 litre DOHC fuel injection models 16 This procedure is as described for the 2.0 litre DOHC carburettor models (ESC II module).

Air charge temperature sensor 1.6 and 1.8 litre (R6A type) CVH models
17 The sensor is located in the side of the CFI unit on 1.6 litre engines (see illustration),

21.17 Air charge temperature sensor location on 1.6 litre engines (arrowed)
21.17 Air charge temperature sensor location on 1.6 litre engines (arrowed)

and on the inlet manifold on 1.8 litre engines.

18 Disconnect the battery negative lead.

19 Disconnect the sensor wiring plug by pulling on the plug, not the wiring.

20 Unscrew the sensor from its location, and remove it.

21 Refitting is a reversal of removal, but coat the threads of the sensor with suitable sealant before fitting.

2.0 litre DOHC fuel injection models 22 The sensor is located in the upper section of the inlet manifold.

23 Disconnect the battery negative lead.

24 Disconnect the sensor wiring plug by pulling on the plug, not the wiring (see illustration).

21.24 Disconnecting the air charge temperature sensor wiring plug
21.24 Disconnecting the air charge temperature sensor wiring plug

25 Unscrew the sensor from the inlet manifold, and remove it.

26 Refitting is a reversal of removal, noting the torque setting for the sensor.

Vehicle speed sensor
1.6 and 1.8 litre CVH (R6A type) and 2.0 litre DOHC fuel injection models 27 The sensor is located in the left-hand side of the gearbox/transmission.

28 Disconnect the battery negative lead.

29 Jack up the vehicle and support it securely on axle stands (see УJacking and Vehicle SupportФ).

30 Detach the sensor wiring connector from its bracket, and separate the two halves of the connector.

31 Unscrew the securing bolt, and withdraw the wiring connector bracket, noting its orientation.

32 Withdraw the sensor from the gearbox/transmission casing (see illustration).

21.32 Withdrawing the vehicle speed sensor from the gearbox casing
21.32 Withdrawing the vehicle speed sensor from the gearbox casing

33 Before refitting the sensor, examine the O-ring, and renew if damaged or worn.

34 Refitting is a reversal of removal, ensuring that the wiring connector bracket is correctly located.

Manifold absolute pressure (MAP) sensor
1.6 and 1.8 litre CVH (R6A type) and 2.0 litre DOHC fuel injection models 35 The sensor is located at the rear righthand side of the engine compartment (see illustration).

21.35 Manifold absolute pressure (MAP) sensor location
21.35 Manifold absolute pressure (MAP) sensor location

36 Disconnect the battery negative lead.

37 Remove the two screws securing the sensor to the body panel, and carefully withdraw the sensor, taking care not to strain the wiring.

38 Disconnect the wiring plug from the sensor, pulling on the plug, not the wiring, then disconnect the vacuum hose and remove the sensor.

39 Refitting is a reversal of removal.

Fuel temperature sensor - removal and refitting
2.0 litre DOHC fuel injection models 40 The sensor is located in the top of the fuel rail.

41 Disconnect the battery negative lead, and to improve access, disconnect the wiring plug from the air charge temperature sensor (in the inlet manifold). Disconnect the sensor wiring plug by pulling on the plug, not the wiring.

42 Disconnect the fuel temperature sensor wiring plug, again pulling on the plug (see illustration).

21.42 Disconnecting the fuel temperature sensor wiring plug
21.42 Disconnecting the fuel temperature sensor wiring plug

43 Unscrew the sensor from the fuel rail, and remove it.

44 Refitting is a reversal of removal, noting the torque setting for the sensor.


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