TechWiki - User contributions [en-gb]

Interior Light

2019-03-19T22:15:16Z

Deggles: /* S1 Cars */

===Interior Light===

Elise Interior Light

===S1 Cars===

The S1 interior light is a 10W 42mm festoon bulb (Lucas 264), located low down in the centre of the fascia. The housing can be pulled out of the dash by depressing the plastic tab on the side. Take care, permanently live connections and an aluminium surround. LED replacements are available, of variable quality and brightness.

The housing itself is a Hella unit, and appears to be the same as used on various VWs (T2, T25 Camper, Mk1 Golf Cabriolet) and even the Porsche 924/944. Part no. 823947105B.

===S2 Non Air Con Cars / Pre MY04 ===

*The interior light on poverty spec / boggo spec / pre MY04 cars is located just above the fan switches, it is unknown if the LED modification will work on this.
'''Please Add Info'''

===S2 Cars With Air Con, or MY04 onwards===

*On early cars with air-con, or from MY04 onwards the interior light is located behind the seats.
And once again our resident handy man SELOC member [http://forums.seloc.org/m/dobbin Dobbin] has this nifty little trick.

The standard unit is the same as the ones found in the Citroen AX and possibly other PSA models (SAXO/106, 306 etc). If anybody wants to buy one for a donor these can be easily found in a scrapyard

[http://www.ultraleds.co.uk/product_info.php?products_id=800 LEDs from here]

*Remove the standard light housing

[[Image:led1.jpg|thumb|left|Housing removed.]]
{{clr}}

*Standard blub shown on the left

[[Image:led2.jpg|thumb|left|Standard bulb shown on the left.]]
{{clr}}
*As you can see the LEDs on the side stick out just a bit more than the contacts of the holder.

[[Image:led3.jpg|thumb|left|LED v. Housing.]]
{{clr}}
*Take the whole lot of light housing apart

[[Image:led4.jpg|thumb|left|Housing striped down.]]
{{clr}}

*Attack Housing with a dremel and enlarge the bulb holes
[[Image:led5.jpg|thumb|left|Housing after enlarging.]]
[[Image:led6.jpg|thumb|left|Housing after enlarging.]]
{{clr}}

*Put all clips back together and jobs a carrot.
[[Image:led7.jpg|thumb|left|LED in car.]]
[[Image:led8.jpg|thumb|left|LED in car.]]
{{clr}}

[[Category:Interior]]
[[Category:Electrical]]
[[Category:Lotus Elise]]
[[Category:S2]]
[[Category:S2 Exige]]

Idle Air Control Valve

2016-09-20T18:54:54Z

Deggles: /* S1 Exige */

[[Image:S2_K_Series_IACV.JPG|thumb|left|Idle Air Control Valve (S2 K-Series)]]
The '''Idle Air Control Valve''' (IACV), or '''stepper motor''', allows the electronic control unit ([[ECU]]) to regulate the airflow to the engine independently of the driver's throttle input.

When the engine is idling ECU uses this control (in parallel with ignition timing modulation) to compensate for varying loads that the engine must overcome to maintain the desired idle speed (i.e. friction, electrical load, A/C compressor load etc)

The IACV is also used to control airflow during load changes between positive and negative torque to provide a throttle damping function to improve the drivability characteristics of the vehicle.
{{clr}}

*S1 K-Series engined Elises use a Rover EU2 Stepper IACV (Part No. Rover MLZ100090)
*S1 Exige uses a Bosch IACV (Part No. A918E6011F or Bosch 0280140516)
*S2 K-Series engined Elises use a Rover EU3 PWM IACV (Rover MDQ100170 Lotus A117E6069S)

If you are suspicious that your IACV may be stuck/jammed, you can test it by disconnecting and reconnecting the [[ECU]] temperature sender with the car ignition on (but not running). If it can move, you'll hear it chatter as it seeks to a new position when you unplug the sensor.

==Fitting and removal==
==S1==
Removal is a simple process and takes less than five minutes. It is held in place by two t20 torx screws although a 3mm allen key will also fit. The lower bolt is slightly harder to get at although easy when the IACV is disconnected from the loom. When removed it may be sooty and should be cleaned with carburettor cleaner.

===Location===
[[Image:IACV.jpg|thumb|left|Idle Air Control Valve (S1 K-Series)]]
{{clr}}

==S1 Exige==
The IACV is mounted underneath the airbox, in a bracket/clamp that is bolted to the engine block. Undo the long M6 bolt (10mm socket) to slacken the clamp and remove the IACV.

===Location===
[[Image:IAC_ExigeS1.jpg|thumb|left|Idle Air Control Valve (S1 Exige)]]
{{clr}}

==S2==
Removal, cleaning and refitting is a 20 minute job. Unplug the loom attachment first. The valve assembly is held in place by four torx screws. The lower two are not visible and have to be located by feel. When the assembly comes free be careful not to drop the rubber seal. Detach the hose. Cleaned with copious amounts of carburettor cleaner spray (until the fluid runs clear). Fitting is reverse of removal, use silicon grease on the seal before reseating. Screw torque 1.5nm.

http://forums.seloc.org/viewthread.php?tid=166362&page=1#pid3289867

===Location===
[[Image:iacv_in_situ.jpg|thumb|left|Idle Air Control Valve (S2 K-Series) In Situ]]
{{clr}}
[[Image:iacv_released.jpg|thumb|left|Idle Air Control Valve (S2 K-Series) Released]]
{{clr}}

=="Resetting" the iacv==
S1 (Stepper) The IAC Valve position maybe reset by switching the ignition on disabling the immobiliser and pressing the throttle fully and slowly 5 times, it may also be reset with the Lotus check tool. This is detailed in section EMN page 14 of the service manual.

S2 (PWM) The S2 ECU cant measure where the IACV is so has to count the drive pulses it sends and remember the position, then tries to return to a datum every ignition on/off. If it loses track e.g. battery disconnected the ignition needs to be switched on to position 2 and off several times to run the valve back to the datum.

== External links ==
* http://www.eliseparts.com/shop/index.php?main_page=product_info&cPath=131&products_id=460

[[Category:Electrical]]
[[Category:Engine]]
[[Category:Lotus Elise]]
[[Category:S1]]
[[Category:S2]]
[[Category:Air Induction]]

File:IAC ExigeS1.jpg

2016-09-20T18:52:21Z

Deggles: Idle Air Control Valve location for S1 Exige

Idle Air Control Valve location for S1 Exige

Idle Air Control Valve

2016-09-20T18:51:45Z

Deggles:

[[Image:S2_K_Series_IACV.JPG|thumb|left|Idle Air Control Valve (S2 K-Series)]]
The '''Idle Air Control Valve''' (IACV), or '''stepper motor''', allows the electronic control unit ([[ECU]]) to regulate the airflow to the engine independently of the driver's throttle input.

When the engine is idling ECU uses this control (in parallel with ignition timing modulation) to compensate for varying loads that the engine must overcome to maintain the desired idle speed (i.e. friction, electrical load, A/C compressor load etc)

The IACV is also used to control airflow during load changes between positive and negative torque to provide a throttle damping function to improve the drivability characteristics of the vehicle.
{{clr}}

*S1 K-Series engined Elises use a Rover EU2 Stepper IACV (Part No. Rover MLZ100090)
*S1 Exige uses a Bosch IACV (Part No. A918E6011F or Bosch 0280140516)
*S2 K-Series engined Elises use a Rover EU3 PWM IACV (Rover MDQ100170 Lotus A117E6069S)

If you are suspicious that your IACV may be stuck/jammed, you can test it by disconnecting and reconnecting the [[ECU]] temperature sender with the car ignition on (but not running). If it can move, you'll hear it chatter as it seeks to a new position when you unplug the sensor.

==Fitting and removal==
==S1==
Removal is a simple process and takes less than five minutes. It is held in place by two t20 torx screws although a 3mm allen key will also fit. The lower bolt is slightly harder to get at although easy when the IACV is disconnected from the loom. When removed it may be sooty and should be cleaned with carburettor cleaner.

===Location===
[[Image:IACV.jpg|thumb|left|Idle Air Control Valve (S1 K-Series)]]
{{clr}}

==S1 Exige==
The IACV is mounted underneath the airbox, in a bracket bolted to the engine block with an M10 hex-head bolt (17mm socket)

===Location===
[[Image:IAC_ExigeS1.jpg|thumb|left|Idle Air Control Valve (S1 Exige)]]
{{clr}}

==S2==
Removal, cleaning and refitting is a 20 minute job. Unplug the loom attachment first. The valve assembly is held in place by four torx screws. The lower two are not visible and have to be located by feel. When the assembly comes free be careful not to drop the rubber seal. Detach the hose. Cleaned with copious amounts of carburettor cleaner spray (until the fluid runs clear). Fitting is reverse of removal, use silicon grease on the seal before reseating. Screw torque 1.5nm.

http://forums.seloc.org/viewthread.php?tid=166362&page=1#pid3289867

===Location===
[[Image:iacv_in_situ.jpg|thumb|left|Idle Air Control Valve (S2 K-Series) In Situ]]
{{clr}}
[[Image:iacv_released.jpg|thumb|left|Idle Air Control Valve (S2 K-Series) Released]]
{{clr}}

=="Resetting" the iacv==
S1 (Stepper) The IAC Valve position maybe reset by switching the ignition on disabling the immobiliser and pressing the throttle fully and slowly 5 times, it may also be reset with the Lotus check tool. This is detailed in section EMN page 14 of the service manual.

S2 (PWM) The S2 ECU cant measure where the IACV is so has to count the drive pulses it sends and remember the position, then tries to return to a datum every ignition on/off. If it loses track e.g. battery disconnected the ignition needs to be switched on to position 2 and off several times to run the valve back to the datum.

== External links ==
* http://www.eliseparts.com/shop/index.php?main_page=product_info&cPath=131&products_id=460

[[Category:Electrical]]
[[Category:Engine]]
[[Category:Lotus Elise]]
[[Category:S1]]
[[Category:S2]]
[[Category:Air Induction]]

Idle Air Control Valve

2016-09-20T18:36:04Z

Deggles:

[[Image:S2_K_Series_IACV.JPG|thumb|left|Idle Air Control Valve (S2 K-Series)]]
The '''Idle Air Control Valve''' (IACV), or '''stepper motor''', allows the electronic control unit ([[ECU]]) to regulate the airflow to the engine independently of the driver's throttle input.

When the engine is idling ECU uses this control (in parallel with ignition timing modulation) to compensate for varying loads that the engine must overcome to maintain the desired idle speed (i.e. friction, electrical load, A/C compressor load etc)

The IACV is also used to control airflow during load changes between positive and negative torque to provide a throttle damping function to improve the drivability characteristics of the vehicle.
{{clr}}

*S1 K-Series engined Elises use a Rover EU2 Stepper IACV (Part No. Rover MLZ100090)
*S1 Exige uses a Bosch IACV (Part No. A918E6011F or Bosch 0280140516)
*S2 K-Series engined Elises use a Rover EU3 PWM IACV (Rover MDQ100170 Lotus A117E6069S)

If you are suspicious that your IACV may be stuck/jammed, you can test it by disconnecting and reconnecting the [[ECU]] temperature sender with the car ignition on (but not running). If it can move, you'll hear it chatter as it seeks to a new position when you unplug the sensor.

==Fitting and removal==
==S1==
Removal is a simple process and takes less than five minutes. It is held in place by two t20 torx screws although a 3mm allen key will also fit. The lower bolt is slightly harder to get at although easy when the IACV is disconnected from the loom. When removed it may be sooty and should be cleaned with carburettor cleaner.

===Location===
[[Image:IACV.jpg|thumb|left|Idle Air Control Valve (S1 K-Series)]]
{{clr}}

==S2==
Removal, cleaning and refitting is a 20 minute job. Unplug the loom attachment first. The valve assembly is held in place by four torx screws. The lower two are not visible and have to be located by feel. When the assembly comes free be careful not to drop the rubber seal. Detach the hose. Cleaned with copious amounts of carburettor cleaner spray (until the fluid runs clear). Fitting is reverse of removal, use silicon grease on the seal before reseating. Screw torque 1.5nm.

http://forums.seloc.org/viewthread.php?tid=166362&page=1#pid3289867

===Location===
[[Image:iacv_in_situ.jpg|thumb|left|Idle Air Control Valve (S2 K-Series) In Situ]]
{{clr}}
[[Image:iacv_released.jpg|thumb|left|Idle Air Control Valve (S2 K-Series) Released]]
{{clr}}

=="Resetting" the iacv==
S1 (Stepper) The IAC Valve position maybe reset by switching the ignition on disabling the immobiliser and pressing the throttle fully and slowly 5 times, it may also be reset with the Lotus check tool. This is detailed in section EMN page 14 of the service manual.

S2 (PWM) The S2 ECU cant measure where the IACV is so has to count the drive pulses it sends and remember the position, then tries to return to a datum every ignition on/off. If it loses track e.g. battery disconnected the ignition needs to be switched on to position 2 and off several times to run the valve back to the datum.

== External links ==
* http://www.eliseparts.com/shop/index.php?main_page=product_info&cPath=131&products_id=460

[[Category:Electrical]]
[[Category:Engine]]
[[Category:Lotus Elise]]
[[Category:S1]]
[[Category:S2]]
[[Category:Air Induction]]

Idle Air Control Valve

2016-09-20T18:33:41Z

Deggles: added Lotus and Bosch part numbers for S1, fixed some typos

[[Image:S2_K_Series_IACV.JPG|thumb|left|Idle Air Control Valve (S2 K-Series)]]
The '''Idle Air Control Valve''' (IACV), or '''stepper motor''', allows the electronic control unit ([[ECU]]) to regulate the airflow to the engine independently of the driver's throttle input.

When the engine is idling ECU uses this control (in parallel with ignition timing modulation) to compensate for varying loads that the engine must overcome to maintain the desired idle speed (i.e. friction, electrical load, A/C compressor load etc)

The IACV is also used to control airflow during load changes between positive and negative torque to provide a throttle damping function to improve the drivability characteristics of the vehicle.
{{clr}}

*S1 K-Series engined Elises use a Rover EU2 Stepper IACV (Part No. Rover MLZ100090 Lotus A918E6011F or Bosch 0280140516)
*S2 K-Series engined Elises use a Rover EU3 PWM IACV (Rover MDQ100170 Lotus A117E6069S)

If you are suspicious that your IACV may be stuck/jammed, you can test it by disconnecting and reconnecting the [[ECU]] temperature sender with the car ignition on (but not running). If it can move, you'll hear it chatter as it seeks to a new position when you unplug the sensor.

==Fitting and removal==
==S1==
Removal is a simple process and takes less than five minutes. It is held in place by two t20 torx screws although a 3mm allen key will also fit. The lower bolt is slightly harder to get at although easy when the IACV is disconnected from the loom. When removed it may be sooty and should be cleaned with carburettor cleaner.

===Location===
[[Image:IACV.jpg|thumb|left|Idle Air Control Valve (S1 K-Series)]]
{{clr}}

==S2==
Removal, cleaning and refitting is a 20 minute job. Unplug the loom attachment first. The valve assembly is held in place by four torx screws. The lower two are not visible and have to be located by feel. When the assembly comes free be careful not to drop the rubber seal. Detach the hose. Cleaned with copious amounts of carburettor cleaner spray (until the fluid runs clear). Fitting is reverse of removal, use silicon grease on the seal before reseating. Screw torque 1.5nm.

http://forums.seloc.org/viewthread.php?tid=166362&page=1#pid3289867

===Location===
[[Image:iacv_in_situ.jpg|thumb|left|Idle Air Control Valve (S2 K-Series) In Situ]]
{{clr}}
[[Image:iacv_released.jpg|thumb|left|Idle Air Control Valve (S2 K-Series) Released]]
{{clr}}

=="Resetting" the iacv==
S1 (Stepper) The IAC Valve position maybe reset by switching the ignition on disabling the immobiliser and pressing the throttle fully and slowly 5 times, it may also be reset with the Lotus check tool. This is detailed in section EMN page 14 of the service manual.

S2 (PWM) The S2 ECU cant measure where the IACV is so has to count the drive pulses it sends and remember the position, then tries to return to a datum every ignition on/off. If it loses track e.g. battery disconnected the ignition needs to be switched on to position 2 and off several times to run the valve back to the datum.

== External links ==
* http://www.eliseparts.com/shop/index.php?main_page=product_info&cPath=131&products_id=460

[[Category:Electrical]]
[[Category:Engine]]
[[Category:Lotus Elise]]
[[Category:S1]]
[[Category:S2]]
[[Category:Air Induction]]