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Lotus Elise / Lotus Exige. Manual - part 62

Lotus Service Notes Section JJ

Page 30

JJ.16 - SPECIAL TOOLS

Retraction Tool, Rear Calliper Piston T000T1242

Used to retract the rear calliper pistons and

enable fitment of new brake pads.

Lotus Scan Tool T000T1418F

In order to provide for communication with the engine management system electronic control module, a

hand held electronic scanner 'Lotus Scan' (part number T000T1418F), may be plugged into a special 16
terminal harness connector socket, known as a Data Link Connector (DLC), located at the front of the passen-
ger footwell. Note that this tool may also be used on previous Elise models (excluding Exige '00 M.Y, 340R and
160 models).

Amongst the operations available using the 'Lotus Scan' tool are:

Clear fault codes

View fault codes/wheel speeds/valve activities

Generate valve/motor activities

Read EEPROM contents

Read ECU identification

Operating instructions are provided with the tool.

Important Note

The power supply transformer is used for overnight charging of the printer, and also for powering the

Lotus Scan tool during software downloading from a PC (personal computer). For the software download
operation, the Scan tool requires a power supply from the mains via the transformer and an inverter. Two types
of inverter have been used; early kits used an adaptor lead to plug into the bottom end of the Scanner tool.
Later kits use an adaptor plug fitting into the top end of the scanner.

When charging the printer, it is most important that the inverter is NOT used, or damage to the

transformer may be caused. Incorrect connection is possible only with the early type adaptor lead, with which
extra care should be exercised.

Reading data from vehicle

Data Link Connector (DLC)

Scan 3

(front of passenger footwell)

Printer

em192a

j157

Lotus Service Notes

Section JJ

Page 31

Downloading software from P.C.

With early type adaptor lead

Connect to COM

Power

port on PC

supply
transformer

Adaptor lead used
to connect to
transformer

em192c

Charging printer

Power supply
transformer

Do NOT use adaptor
lead for this application

Printer

With later type adaptor

Connect to COM
port on PC

Power
supply
transformer

Power supply adaptor

em192f

Lotus Service Notes Section JJ

Page 32

JJ.17 - 'LOTUS SCAN' CHECKING PROCEDURES

Trouble Codes

When the ABS controller detects a fault in the system, the following events occur;

i) The ABS tell tale is lit;
ii) The anti-lock system is switched out;
iii) A trouble code is stored in the non volatile random access memory i.e. memory which is retained when the

power supply is interrupted, or the battery disconnected.

Trouble codes may be either Condition Latched, or Ignition Latched:

Condition Latched; With this type of fault, which is generally low or high voltage, the ABS tell tale will

light, and the anti-lock system switch out, until such time as conditions return to normal, at which point the light
will be extinguished, and the anti-lock be reinstated. The trouble code will be stored only whilst the fault is
present.

Ignition Latched; This type of fault, of which are most categories, will cause the tell tale to be lit and the

anti-lock to be inhibited until such time as the fault is no longer detected at the moment of a subsequent
switching on of the ignition. At this point, the lamp will be extinguished, and the ABS restored, but the trouble
code will be retained in the memory for the next 20 drive cycles i.e. ignition switched on and a minimum road
speed of 5 mph attained.

Access to the diagnostic codes is available only by using the 'Lotus Scan' tool connected to the DLC

(see JG.15). The ‘Lotus Scan’ is a hand held electronic scanner tool with an LCD display panel which is able to
display any stored trouble codes and sensor readings as well as allowing manual operation of actuators.
The facilities available include:

- View fault codes/wheel speeds/valve activities
- Clear fault codes
- Generate valve/motor activities
- Read EEPROM contents
- Read ECU identification

Important Notes

Whenever the Lotus Scan tool is connected, the ABS tell tale is lit and the anti-lock function is inoperative.

Never connect or disconnect the DLC to/from the control unit with the ignition switched on.

- Before charging or quickcharging, disconnect the battery from the vehicle electrical system.

Never disconnect the battery from the vehicle electrical system with the engine running.

Never use a quick-charger for starting.

Take care when touching energised parts of the ignition system.

ECMs must be removed prior to welding operations, or subjecting to oven temperatures above 80°C.

When voltage testing, use only a high-resistance type meter.

During test steps which involve the connection of contacts from harness plugs or control units with ground

or battery voltage (+12V), exercise great care as incorrect contact can cause permanent damage to the

ECM internal circuits.

When measuring resistance from ground bearing wires to vehicle ground, the nominal value of 'less than 2

ohms' sometimes cannot be achieved. In this case, disconnect the negative (ground) post of the battery
and measure the resistance to the vehicle earth lead.

Always erase trouble codes from any control unit after a test is done.

Lotus Service Notes

Section JJ

Page 33

Abbreviations & Definitions

BATTERY VOLTAGE

System voltage

BRAKE LIGHT SW.

Brake light switch

FL WHEEL SPEED

Front left wheel speed

FR WHEEL SPEED

Front right wheel speed

RL WHEEL SPEED

Rear right wheel speed

RR WHEEL SPEED

Rear right wheel speed

FRONT WHL SPEEDS

Front wheel speed

REAR WHL SPEEDS

Rear wheel speed

VALVE RELAY CMD

Valve relay command

VAVLE RELAY FDBK

Valve relay feedback

RETURN PUMP CMD

Return pump command

RETURN PUMP FDBK

Return pump feedback

FL HOLD SOL. CMD

Front left solenoid hold command

FL HOLD SOL. FDBK

Front left solenoid hold feedback

FL REL. SOL. CMD

Front left solenoid release command

FL REL. SOL. FDBK

Front left solenoid release feedback

FR HOLD SOL. CMD

Front right solenoid hold command

FR HOLD SOL. FDBK

Front right solenoid hold feedback

FR REL. SOL. CMD

Front right solenoid release command

FR REL. SOL. FDBK

Front right solenoid release feedback

RL HOLD SOL. CMD

Rear left solenoid hold command

RL HOLD SOL. FDBK

Rear left solenoid hold feedback

RL REL. SOL. CMD

Rear left solenoid release command

RL REL. SOL. FDBK

Rear left solenoid release feedback

RR HOLD SOL. CMD

Rear right solenoid hold command

RR HOLD SOL. FDBK

Rear right solenoid hold feedback

RR REL. SOL. CMD

Rear right solenoid release command

RR REL. SOL. FDBK

Rear right solenoid release feedback

ECU Identification

The ECU identification number for the Elise/Exige is: A120J6000F

Supplier ECU Hardware Number: EBC 430

Supplier ECU Software Number: LCFWDQ04K2K

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