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Lotus Eleven/Elise/Exige. Manual - part 36

Page 19

Lotus Service Notes

Section EH

VALVEMATIC System

The principle of the VALVEMATIC system is that a conventional inlet camshaft with a single (rotary) cam

for each cylinder operates a roller arm on a pivot shaft. On each side of the roller arm is an oscillating cam,

each of which opens, via a finger follower, one of two conventional inlet valves for that cylinder. The two valves

are operated at all times as a pair. The connection between the roller arm and the two oscillating cams is made

via a common pivot sleeve machined with three separate sections of helical splines, which correspond with

splines in the bores of the roller arm and oscillating cams. By sliding the sleeve axially, within the roller arm

and cams, the opposite helix angle used for the cams compared with that for the roller arm, results in a phase

shift between arm and cams.

A 'lost motion' damper ensures that the roller arm stays in contact with the rotary cam profile at all times.

The position of the oscillating cams at the start of a valve opening event however, is dependent on their phasing

with the roller arm. In the low lift mode, where the cams are phased counterclockwise in relation to the roller

arm as viewed from the rear, the finger follower roller is in contact with the base circle of the oscillating cam,

which must turn through a large part of its range before the cam starts to lift the valve, resulting in only the first

portion of the cam profile being used. In high lift mode, the oscillating cams are phased clockwise in relation to

the roller arms such that the cam profile immediately starts to lift the valve as soon as the roller arm is depressed

by the rotary cam, continuing then to utilise the full profile of the oscillating cam for maximum lift.

The concomitant variation in valve timing as the lift changes, is managed by the separate VVT-i system

(see earlier).

Valves shown at full lift (camshaft omitted for clarity)

Pivot shaft

Roller arm

Camshaft

Oscillating cam operates against

this roller

Finger follower

Inlet valves

Hydraulic

pivot post

Page 20

Lotus Service Notes

Section EH

Auxiliary Belt Tension

The auxiliary belt tension on the 1ZR FAE engine is set manually by adjusting the alternator position. An

adjusting screw for this purpose is provided on the alternator strap, and may be utilised after slackening the

strap anchor and clamp bolts, and the alternator lower pivot bolt.

Belt tension should be set using a frequency meter between the water pump and alternator pulleys:

New belt; 110 Hz (± 5 Hz). Used belt; 90 - 100 Hz.

Alternatively, a force meter can be used on the lower belt run between the crankshaft and water pump:

New belt; 700 - 800 N. Used belt; 550 - 770 N.

If no meter is available, apply firm thumb pressure to the midpoint of the belt run between water pump and

alternator, and measure the deflection:

New belt; 7 - 8 mm. Used belt; 8 - 10 mm.

Engine Lubrication

For optimum engine protection, the oil level should be maintained towards the dipstsick top mark, not be

allowed to fall below the mid-point. If driving on a closed circuit track, or exploiting maximum cornering capabil-

ity, it is especially important to maintain at the upper marking. Adding approximately ½ litre will raise the level

from the mid-point to the upper mark.

- The oil filter is a cartridge type paper element

similar in concept to the Evora, and is mounted

at the right hand rear of the engine, accessible

from beneath after removal of the engine bay

undertray.

- Make provision for collecting the small amount of

spilled oil before fitting adaptor tool T000T1441F

over the cap to release the security catch, and

allow it to be unscrewed using a 17mm wrench,

or 3/8 inch square drive. Release about 4 turns

before positioning the triple rib feature on the cap

lowermost; this will aid draining of the oil from the

filter housing. Then complete the removal of the

cap, and dispose of the paper filter element and

cap ‘O’ ring safely.

Clean the oil filter cap and inside of the filter housing. Carefully fit a new ‘O’ ring (supplied with the new

filter) into its groove on the cap and smear with clean engine oil before inserting a new filter element and refit-

ting the cap, taking care to avoid cross-threading, and ensuring that the ‘O’ ring is not displaced. Using adaptor

tool T000T1441F, tighten the cap to 25 Nm.

Engine Repair

An engine repair CD is available under part number T000T1523F. For a technical overview, choose:

New Car Features

2008/11 Update

New Features

1ZR-FAE and 2ZR-FAE Engine

Then select from the drop-down menu as required.

For repair procedures, choose:

Repair Manual

Engine

scroll down past diagnostic codes to find 1ZR-FAE ENGINE MECHANICAL in left hand column.

Paper

element

‘O’ ring

Adaptor Align triple Filter cap

tool rib lowermost

to drain housing

OIL FILTER (1ZR)

ohs175

Lotus Service Notes

Section EMP

Page 1

ENGINE MANAGEMENT

SECTION EMP

Sub-Section Page

Diagnostic Trouble Code List EMP.1 3

Diagnostic Scanner Tools EMP.2 43

Engine Management Component Location EMP.3 47

Mechanical Throttle Setting Procedure EMP.4 48

2006 Model Year Electronic Throttle Control EMP.5 49

Diagnostic Trouble Code Supplement - '06 M.Y. EMP.6 50

Diagnostic Trouble Code Supplement - 2011 M.Y. Elise (Euro 5) EMP.7 58

Page 2

Lotus Service Notes

Section EMP

EMP.1 - DIAGNOSTIC TROUBLE CODE LIST

DTC Fault description Page

P0011 Camshaft Position - Timing Over-Advanced or System Performance 4

P0012 Camshaft Position - Timing Over-Retarded 4

P0076 Intake Valve Control Solenoid Circuit Low 4

P0077 Intake Valve Control Solenoid Circuit High 4

P0101 Mass or Volume Air Flow Circuit Range/Performance 5

P0102 Mass or Volume Air Flow Circuit Low Input 5

P0103 Mass or Volume Air Flow Circuit High Input 5

P0106 Manifold Absolute Pressure/Barometric Pressure Circuit Range/Performance 7

P0107 Manifold Absolute Pressure/Barometric Pressure Circuit Low Input 7

P0108 Manifold Absolute Pressure/Barometric Pressure Circuit High Input 7

P0111 Intake Air Temperature Sensor 1 Circuit Range/Performance 8

P0112 Intake Air Temperature Sensor 1 Circuit Low 8

P0113 Intake Air Temperature Sensor 1 Circuit High 8

P0116 Engine Coolant Temperature Circuit Range/Performance 10

P0117 Engine Coolant Temperature Circuit Low 10

P0118 Engine Coolant Temperature Circuit High 10

P0121 Throttle Position Sensor 'A' Circuit Range/Performance 12

P0122 Throttle Position Sensor 'A' Circuit Low 12

P0123 Throttle Position Sensor 'A' Circuit High 12

P0128 Coolant Thermostat (Coolant Temperature Below Thermostat Regulating Temperature) 14

P0131 O2 Sensor Circuit Low Voltage (Pre Catalyst) 15

P0132 O2 Sensor Circuit High Voltage (Pre Catalyst) 15

P0133 O2 Sensor Circuit Slow Response (Pre Catalyst) 15

P0134 O2 Sensor Circuit No Activity Detected (Pre Catalyst) 15

P0135 O2 Sensor Heater Circuit (Pre Catalyst) 15

P0137 O2 Sensor Circuit Low Voltage (Post Catalyst) 18

P0138 O2 Sensor Circuit High Voltage (Post Catalyst) 18

P0139 O2 Sensor Circuit Slow Response (Post Catalyst) 18

P0140 O2 Sensor Circuit No Activity Detected (Post Catalyst) 18

P0141 O2 Sensor Heater Circuit (Post Catalyst) 18

P0171 System Too Lean 20

P0172 System Too Rich 20

P0201 Injector Circuit/Open – Cylinder 1 21

P0202 Injector Circuit/Open – Cylinder 2 21

P0203 Injector Circuit/Open – Cylinder 3 21

P0204 Injector Circuit/Open – Cylinder 4 21

P0300 Random/Multiple Cylinder Misfire Detected 22

P0301 Cylinder 1 Misfire Detected 22

P0302 Cylinder 2 Misfire Detected 22

P0303 Cylinder 3 Misfire Detected 22

P0304 Cylinder 3 Misfire Detected 22

P0324 Knock Control System Error 24

P0327 Knock Sensor 1 Circuit Low 24

P0328 Knock Sensor 1 Circuit High 24

P0335 Crankshaft Position Sensor “A” Circuit Range/Performance 25

P0340 Camshaft Position Sensor “A” Circuit 26

P0351 Ignition Coil “A” Primary/Secondary Circuit 27

P0352 Ignition Coil “B” Primary/Secondary Circuit 27

P0353 Ignition Coil “C” Primary/Secondary Circuit 27

P0354 Ignition Coil “D” Primary/Secondary Circuit 27

P0420 Catalyst System Efficiency Below Threshold 28

P0441 Evaporative Emission System Incorrect Purge Flow 29

P0442 Evaporative Emission System Leak Detected (small leak) 29

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