LR3/Disco 3
The high/low position sensor converts the pivotal movement of the high/low fork into a PWM signal on the input. The
PWM signal of the position sensor differs between high range and low range. The control module checks this signal and
informs the driver, via the instrument cluster and the range change selection switch LED's, if a range change is in
progress or has been completed.
The high/low position sensor is connected to the transfer box control module via a three-pin connector.
TRANSFER BOX CONTROL MODULE OUTPUTS
The transfer box control module sends the following outputs:
CAN bus messages
Key interlock solenoid
High/low range change LED
Transfer box motor
Solenoid.
CAN Bus Messages
The control module also sends messages via the CAN bus to tell other control modules on the network, the status of the
transfer box. The high/low status, clutch torque and default mode status are some of the main signals sent out by the
transfer box control module.
Key Interlock Solenoid
The transfer box control module is able to send a signal to the key interlock solenoid. This signal locks the key in the
ignition barrel to prevent it from being removed if the automatic transmission is not in the 'Park' position.
High/Low Range Change LED
Item Part Number
Description
1
-
High range LED
2
-
Low range LED
