landrover Workshop Repair Guides

Land Rover Workshop Service and Repair Manuals

Transfer Case - Will Not Shift/MIL ON|Page 7078 > < Transfer Case - Will Not Shift/MIL ON|Page 7076
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Vehicle shifting poorly in High or Low ranges.

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H-gate illumination problems.

RESOLUTION:

DIAGNOSE AND REPAIR TRANSFER GEARBOX SHIFT CONTROL SYSTEM

Use of the information below will allow the technician to understand and diagnose transfer gearbox shift control problems. The TCU will seldom fail on
its own. The failure is usually caused by other components in the system. This document consists of three key sections:

1.

System Information

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General Description

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Interface With Other Systems

2.

Symptom Diagnosis

3.

Diagnostic Checks And Repair Procedures

4.

TCU Pin Layout

PARTS INFORMATION:

AMR6353

Transfer Gearbox Control Unit

STC1971

Shift Control Motor

5TC3277

Selector Shaft Seal

WARRANTY CLAIMS:

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

Transfer Case - Will Not Shift/MIL ON|Page 7078 > < Transfer Case - Will Not Shift/MIL ON|Page 7076