Lotus Elise / Lotus Exige. Manual - part 45

Page 54

 

 

Lotus Service Notes   

 

 

  Section EMP

Pedal Position Sensor 'E' Circuit Low                    P2127

Description

Two potentiometers are built into the throttle pedal  unit in order to provide a throttle demand signal to the ECU.  

Note that the potentiometers operate on 5 volts.

Enable Criteria: None

Disable Criteria: None

Potential failure modes:

# Signal short circuit (< 0.283 V)

# Reference voltage open circuit

# Reference voltage short to ground

# Sensor failure

Notes: A maximum throttle opening of 15% may be imposed due to this single code.  In the case of multiple 

codes, a mechanically sprung 7% opening may be applied.

Pedal Position Sensor 'E' Circuit High                    P2128

Enable Criteria: None

Disable Criteria: None

Potential failure modes:

# Signal open circuit (> 4.487 V)

# Reference voltage open circuit

# Reference voltage short to ground

# Sensor failure

Notes: A maximum throttle opening of 15% may be imposed due to this single code.  In the case of multiple 

codes, a mechanically sprung 7% opening may be applied.

Throttle Position Sensor 'A'/'B' Voltage Correlation           P2135

Description

Two potentiometers are built into the throttle actuator unit in order to provide a throttle position signal to the 

ECU.  Two processors within the ECU compare the two output signals, which should match within a defined 

tolerance. Note that the potentiometers operate on 5 volts.

Enable Criteria: None

Disable Criteria: Throttle position greater than 60%

Potential failure modes:

# TPS1 reading incorrectly

# TPS2 reading incorrectly

Notes: A maximum throttle opening of 15% may be imposed.

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Lotus Service Notes   

 

 

  Section EMP

Page 55

Pedal Position Sensor/Switch 'D'/'E' Voltage Correlation        P2138

Description

Two potentiometers are built into the throttle pedal unit in order to provide a throttle demand signal to the ECU.  

Two processors within the ECU compare the two output signals, which should match within a defined tolerance. 

Note that the potentiometers operate on 5 volts.

Enable Criteria: None

Disable Criteria: None

Potential failure modes:

# PPS1 reading incorrectly

# PPS2 reading incorrectly

Notes: A maximum throttle opening of 15% may be imposed.

Throttle Actuator Control System – High Airflow Detected      P2173

Description

The mass air flow is compared with the throttle position to determine whether an incorrect correlation exists.

Enable Criteria: None

Disable Criteria: MAF fault(s) present

Potential failure modes:

# Throttle plate damage

# Air leak in intake system

Notes: A mechanically sprung 7% throttle opening may be imposed, or the injectors may be shut off to stop 

the engine.

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Page 1

 

 

Lotus Service Notes   

 

 

     Section FJ

    

       

 

TRANSMISSION

SECTION FJ

                                                    Sub-Section       Page

 

 

Introduction   

 

 

 

 

 

 

FJ.1 

 

2

 

 

Gearchange Mechanism 

 

 

 

 

 

FJ.2 

 

4

 

 

Lubrication   

 

 

 

 

 

 

FJ.3 

 

10

 

 

Driveshafts   

 

 

 

 

 

 

FJ.4 

 

11

 

 

Transmission Replacement   

 

 

 

 

FJ.5 

 

14

 

 

Transmission Overhaul & Special Tools 

 

 

 

FJ.6 

 

15

 

 

See also Toyota transmission repair manual D120T0327J

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Lotus Service Notes   

 

 

     Section FJ

Page 2

FJ.1 - INTRODUCTION

The 5-speed Elise S transmission, and the 6-speed variant used on all other models, are both 'end on' type, 

mounted on the left hand end of the engine unit, and comprise the clutch housing, gearbox, final drive gears, and 

differential.  Both units are supplied by Toyota, and are designated 'C56' and 'C64', (C = series; 5 or 6 = no. of 

gears; 6 or 4 = ratio set) with Toyota publication RM930E covering the description and overhaul of the 6-speed 

transmission (5-speed TBA).  Two control cables are used to transmit the movement of the gearchange lever 

to the transmission selector housing, running along the centre of the cabin and beneath the power unit.

The two shaft gearbox is housed within a three part casing comprising clutch housing, main case and end 

cover, all being alloy castings.

C56 Shown

                                        Clutch housing                   

f138

                           

                    Main case

                                    Clutch splines

End cover 

(casting on Lotus)

            LH driveshaft

            inboard CV joint

                  Final drive 

                  output gear

                                                        Bevel gear

                                                        differential

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