Lotus Elise / Lotus Exige. Instruction - part 63

 

   Lotus Service Notes                                  Section JJ

Page 34

4.

Circuit Diagram

5.

Diagnostic Trouble Codes

   Lotus Service Notes

                Section JJ

Page 35

DTC

Diagnostic Trouble Code Storage Condition

Remedy

C0035

Front left wheel speed sensor:Short circuit or circuit open;

C-04

No signal;

C-04

Incorrect signal;

C-04

C0040

Front right wheel speed sensor: Short circuit or circuit open;

C-05

No signal;

C-05

Incorrect signal;

C-05

C0045

Rear left wheel speed sensor: Short circuit or circuit open;

C-06

No signal;

C-06

Incorrect signal;

C-06

C0050

Rear right wheel speed sensor:

Short circuit or circuit open;

C-07

No signal;

C-07

Incorrect signal;

C-07

C0060

Front left outlet solenoid valve circuit malfunction;

C-12

C0065

Front left inlet solenoid valve circuit malfunction;

C-12

C0070

Front right outlet solenoid valve circuit malfunction;

C-12

C0075

Front right inlet solenoid valve circuit malfunction;

C-12

C0080

Rear left outlet solenoid valve circuit malfunction;

C-12

C0085

Rear left inlet solenoid valve circuit malfunction;

C-12

C0090

Rear right outlet solenoid valve circuit malfunction;

C-12

C0095

Rear right inlet solenoid valve circuit malfunction;

C-12

C0110

Return pump:

circuit open or shorted;

C-10

locked or shorted;

C-10

C0121

Valve relay circuit malfunction;

C-09

C0161

Brake light switch fault;

C-11

C0232

Brake system telltale voltage: high or open circuit;

C-13

low;

C-13

C0245

Wheel speed:

sensor erratic signal;

C-08

C0245

error;

C-08

C0252

Replace electronic control unit;

C-02

C0550

Replace electronic control unit;

C-02

C0550

Brake system or electronic control unit malfunction;

C-12

C0556

Replace electronic control unit;

C-02

C0561

Replace electronic control unit;

C-02

C0563

Replace electronic control unit;

C-02

C0564

Replace electronic control unit;

C-02

C0800

Switched battery voltage: high (valve relay)

C-03

low (valve relay)

C-03

For remedial procedures, see Lotus Scan tool display.

   Lotus Service Notes

                Section JJ

Page 37

FROM '06 M.Y.

Introduced for the 2006 model year, was electronic throttle control (ETC), which dispensed with the

mechanical throttle cable linking the accelerator pedal to the throttle body.  The ‘drive by wire’ throttle actuation
uses a throttle pedal fabricated from steel rod which is pivotted in a plastic housing bolted to the pedal box.
The plastic housing incorporates two pedal position potentiometers operated by rotation of the pedal pivot, and
provide signals to the engine ECU, which then interprets driver commands allied to emission and engine
management requirements, and drives the throttle butterfly stepper motor to the appropriate position, or rate of
change of position.

Other changes to the pedal box include fabricated steel, silver painted brake and clutch pedals fitted

with alloy pedal pads.  Some markets, principally Canada, are fitted with a pedal actuated 'clutch down' switch
to inhibit engine cranking unless the clutch pedal is fully depressed.

The throttle pedal assembly may be removed by disconnecting the harness plug from the module and

releasing the three M8 bolts and nuts securing the unit to the pedal box.
-

The throttle pedal upstop is set internally within the electronic housing, with a downstop moulded into the

housing itself.

-

The brake pedal is pulled 'off' by an extension spring anchored to a bracket rivetted to the scuttle beam.

-

There is normally a gap of approximately 3mm between the brake pedal and the pedal box upstop flange

with the pedal released.  If preferred, the brake pedal can be raised slightly by adjusting the effective
length of the pushrod at its connection to the clevis, but the master cylinder must never be preloaded, i.e.
there must always be a small clearance between the pedal and upstop bracket to ensure that the master
cylinder piston is allowed fully to return and open the reservoir port.

-

After any adjustment, tighten the clevis locknut and check operation of the brake light switch.

-

The clutch pushrod uses an integral plastic clevis to connect to the pedal and control the pedal up position

as the master cylinder tops out.  A downstop buffer is provided on the pedal box flange.

Pedal box

Module to pedal

Pedal shaft mounting

box fixing

plate fixing

Throttle
pedal
electronic
module

Pedal shaft
mounting
plate

Module
connector
socket

Pedal pivot bush

Steel pedal

Pedal shaft

Alloy footpad

                pl1401mt6

Page 20a

   Lotus Service Notes

                Section JJ

Page 39

Page 12a

JJ.8A - '08 MODEL YEAR UPGRADE OPTION

Introduced as an option for some '08 models, is an uprated front brake kit, comprising 4-piston front

callipers, larger diameter front discs and steel braided hoses.

Front Callipers:

At each front corner, the A.P. Racing, alloy, 4-piston front calliper is radially mounted to the front hub

carrier via an alloy adaptor bracket.  Two reduced head capscrews secure the adaptor bracket to the hub
carrier, with two capscrews with washers securing the calliper to the adaptor.  Two retaining pins are used to
locate the Pagid RS14 brake pads, and also secure an anti-rattle spring plate which incorporates a direction of
rotation arrow.

Torque figures:  Adaptor to hub carrier; 58 Nm.  Calliper to adaptor; 58 Nm.  Caliper bleed screw; 17 Nm.

Front Discs:

The front discs are increased in diameter from 288mm to 308mm, and are cooled by internal curved

vanes which trail the normal direction of rotation, to result in distinct RH and LH components.  Each disc is
mounted to its hub via an adaptor 'bell' from which it should not be separated under normal circumstances.
Torque of disc to bell mounting bolts; 14 Nm.   Note that these discs are fitted only on the front, with standard
discs on the rear.

New thickness of the front discs is 26.00mm; minimum service thickness 25.00mm

Wheel bolts:

In order to provide sufficient clearance between the 4-piston brake callipers and all road wheel options,

the thickness of the disc mounting bell at the hub face is increased from the standard 7mm disc thickness to
11mm.  This requires the use of 2mm longer wheel bolts (C117G6000F) to maintain sufficient thread engage-
ment.  To reduce the possibility of incorrect fitment, both front and rear wheels are secured with the longer
bolts, with no coded security bolts fitted.  Note that these bolts use the standard spline type socket heads, but
have a reduced outside diameter of the head.

Standard bolt;

B117G6000F

26mm thread length

Head outside diameter: 22mm

Long bolt;

C117G6000F

28mm thread length

Head outside diameter: 19mm

Braided hoses:

The steel braided front hoses are connected to the front callipers using a banjo fitting tightened to 25 Nm.