Range Rover HSE (LP) V8-4.6L (1997)
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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