Range Rover (LP) V8-4.0L (1999)
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Technical Service Bulletin # TEC4103971
Date: 970620
Transfer Case - Will Not Shift/MIL ON
No: 41/03/97/NAS
Ref: WSM section 41
Issue: 1
Date: 06/20/97
Pride IV
1-16
Transfer Gearbox Control Unit (TCU)
Diagnostics
AFFECTED VEHICLE RANGE:
RANGE ROVER (LP)
ALL
SITUATION:
There have been reports of customers experiencing problems relating to the transfer gearbox control system. In some cases the failure to shift has been
accompanied by a MIL illumination. The diagnosis of the following is covered in this document:
^
Vehicle will not range shift.
^
MIL illumination with DTCs 1701, 1703 or 1708.
^
Message Centre: "Slow Down", "Select Neutral" or "Transfer Neutral".
^
Cruise Control inoperative.
^
Vehicle shifting poorly in High or Low ranges.
^
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
^
General Description
^
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:
