landrover Workshop Repair Guides

Land Rover Workshop Service and Repair Manuals

Transfer Case - Will Not Shift/MIL ON|Page 389 > < Transfer Case - Will Not Shift/MIL ON
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41.30.01

Time 0.40 hrs.
Replace Transfer Gearbox Shift Control Unit (TCU)

41.30.03

Time 0.45 hrs.
Replace Shift Control Motor

41.20.59

Time 0.60 hrs.

Replace Selector Shaft Seal (includes shift control motor replacement)

COMP CODE: 3X2P

Normal warranty policy and procedures apply

System Information

GENERAL DESCRIPTION

In order to understand and diagnose transfer gearbox control system related problems, a complete understanding of the range shift control process is necessary.

The TCU receives and transmits information to and from:

1.

Shift Control Motor Position Switch

2.

High/Low Request Switch

3.

Transfer Gearbox Speed Sensor

4.

Drivers selected range on the H-Gate

5.

GEMS ECM

6.

Automatic Transmission Control Module (TCM)

7.

The BeCM

Using this information the TCU energizes an electric motor to shift ranges in the transfer gearbox.

Transfer Case - Will Not Shift/MIL ON|Page 389 > < Transfer Case - Will Not Shift/MIL ON