INSTRUMENTS (Description): DESCRIPTION AND OPERATION (page 34 of 37)

INSTRUMENTS

88-38

DESCRIPTION AND OPERATION

Gearbox manual/sport mode warning lamps

The gearbox manual/sport mode warning lamps within the instrument pack each utilise a green LED and a clear 
legend. On vehicles fitted with an automatic gearbox, operating the manual mode switch instructs the Electronic 
Automatic Transmission (EAT) ECU to illuminate the manual mode LED. Operating the sport mode switch instructs 
the EAT ECU to illuminate the sport mode LED.

There is no self-test performed at ignition on for this warning lamp.

If the EAT ECU detects a fault it will cause both warning lamps to flash.

The power input for the LED's is supplied by the instrument pack. The EAT ECU applies a high or low voltage to the 
instrument pack microprocessor which measures the applied voltage from the ECU and illuminates the appropriate 
warning lamp.

The voltage on the earth paths from the EAT ECU to the instrument pack has the following functions:

Warning lamp response

Manual earth path, volts

Sport earth path, volts

No lamps

> 7.7

> 7.7

Sport warning

> 7.7

< 1.8

Manual warning

< 1.8

> 7.7

Both lamps flash

< 1.8

< 1.8