308-07A Four-Wheel Drive Systems: Description And Operation (page 23 of 30)

 
The transfer box control module receives a gear position signal from the manual transmission gear position sensor and 
publishes the status on the CAN bus. This is displayed in the odometer display, similar to how the automatic transmission 
displays gear information. 
 

 
On vehicles fitted with the low line instrument cluster, in place of the message centre there will be a status lamp, which 
has the following logic: 
 

Amber - Over temperature  
Red - Failure, stop vehicle  

The following table shows the faults that could possibly illuminate the transfer box status lamp on vehicles fitted with the 
low-line instrument cluster: 
 

'SPEED TOO HIGH FOR RANGE 

CHANGE' 

Range change request when vehicle speed too high 

Single 

'SELECT NEUTRAL FOR RANGE 

CHANGE' 

Range change request when lever not in neutral 

Single 

'PARK LOCK FAILURE APPLY 

HANDBRAKE' (PARKBRAKE 

US/CAN) 

This alerts the driver that the automatic transmission park lock 

function is inoperative due to transfer box out of high or low range. 

Transfer box control module has stopped transmitting on the CAN 

bus during a range change or while in neutral mode and as a result 

the automatic transmission park lock function is inoperative 

One per 

second for 

three 

seconds 

'RANGE CHANGE INOPERABLE' 

Transfer box has detected a fault inhibiting a new range change. 

Control unit has shut down due to thermal overload 

Single 

'CENTRE DIFF OVER TEMP 

REDUCE SPEED' 

Centre differential temperature is approaching the over heated 

threshold 

Single 

'CENTRE DIFF FAULT – 

TRACTION REDUCED' 

Centre differential has failed - operating as an open differential 

Single 

'CENTRE DIFF FAULT – 

TRACTION REDUCED' 

Transfer box control module has stopped transmitting on the CAN 

bus and defaults to open centre differential 

Single 

Odometer Display 

Description 

N 

Transmission is in neutral 

1 

Transmission is in first gear 

2 

Transmission is in second gear 

3 

Transmission is in third gear 

4 

Transmission is in forth gear 

5 

Transmission is in fifth gear 

6 

Transmission is in sixth gear 

R 

Transmission is in reverse gear (Japan only) 

Blank display 

Transmission is between neutral and a gear 

E 

Transmission gear position sensor has a fault 

Indication 

Description 

OFF 

Transfer box is operating at normal working temperature 

YELLOW 

WARNING LAMP 

ON 

Transfer box temperature is approaching the over heated threshold 

YELLOW 

WARNING LAMP 

ON 

Transfer box has detected a fault, which affects the range change function (current range is still 

maintained) or the centre differential has failed to open. 

RED WARNING 

LAMP ON 

Transfer box has detected a fault which renders the transmission park lock function inoperative 

due to out of range condition, OR centre differential has failed with a non-zero locking torque 

YELLOW 

WARNING LAMP 

Transfer box control module has stopped transmitting on the CAN bus and defaults to open centre 

differential