Default/Limp Home Strategy
If a fault occurs with the transfer box, the transfer box ECU or one of the required input signals, i.e.; road speed signal, the ECU records an error code and the transfer box low range MOUNTAIN symbol in the instrument pack flashes permanently.
As a default setting, the ECU will attempt to engage high or low range in order to allow the vehicle to be driven to a Land Rover dealer for repair. To ensure a range is engaged, the ignition must be switched off and then on again (timed shift performs this without ignition cycling). This causes the ECU to power the actuator and engage the previously selected range.
TRANSFER BOX HARNESS CONNECTOR C1319 PIN DETAILS
| Pin No. | Description | Input/Output |
|---|---|---|
| 1-6 | Not Used | - |
| 7 | Neutral Request (When Fuse 37 Installed) | Input |
| 8 | High/Low Range Switch | Input |
| 9-12 | Not Used | - |
| 13 | CAN Bus Low | Input/Output |
| 14 | Not Used | - |
| 15 | Ignition Power Supply | Input |
| 16 | Not Used | - |
| 17 & 18 | Not Used | - |
| 19 | Diagnostic ISO 9141 K Line Bus | Input/Output |
| 20-25 | Not Used | - |
| 26 | CAN Bus High | Input/Output |
| 27-52 | Not Used | - |
TRANSFER BOX HARNESS CONNECTOR C1854 PIN DETAILS
| Pin No. | Description | Input/Output |
|---|---|---|
| 1-5 | Not used | - |
| 6 | Actuator Potentiometer 5 Volt Reference Voltage | Output |
| 7-9 | Not Used | - |
| 10 | Actuator Potentiometer Signal | Input |
| 11-16 | Not Used | - |
| 17 | Actuator Potentiometer Ground | - |
| 18-40 | Not Used | - |
TRANSFER BOX HARNESS CONNECTOR C1855 PIN DETAILS
| Pin No. | Description | Input/Output |
|---|---|---|
| 1 | Not Used | - |
| 2 | Ground | - |
| 3 | Ground | - |
| 4 | Motor Supply/Ground A | Input/Output |
| 5 | Permanent Battery Power Supply | Input |
| 6 | Permanent Battery Power Supply | Input |
| 7 | Motor Supply/Ground A | Input/Output |
| 8 | Motor Supply/Ground B | Input/Output |
| 9 | Motor Supply/Ground B | Input/Output |