Range Rover SE (LP) V8-4.0L (1995)
Engine Control Module: All Technical Service Bulletins
False MIL ON DTC's P1775 & 23 Set
No: 19/09/97/NAS
Ref: WSM Section 19
* Issue: 2 *
Date: 12/05/97
Updated information is shown by asterisks.
PRIDE V
1-19
MIL Illumination
Gearbox Fault Code 23
AFFECTED VEHICLE RANGE:
RANGE ROVER (LP)
1995-1997
SITUATION:
FALSE MIL ILLUMINATION IN COLD AMBIENT TEMPERATURES
There have been some cases in which customers have complained of a MIL illumination during low ambient temperature operation. Code retrieval
reveals a DTC P1775 and a gearbox fault 23. The problem is more prevalent on 4.6L vehicles under hard acceleration. In some cases the gearbox will
default to 3rd gear when the fault is present.
RESOLUTION:
REPLACE PROM IN GEMS ECM
In order to properly diagnose this fault the technician should retrieve P-Codes and Freeze Frame data and FAX a completed DTCR to LRNA. A new
PROM has been developed which will eliminate this problem for each affected model year. Use the following procedure to diagnose and repair this
condition.
NOTE:
The repairs outlined in this TIB are to be performed to resolve customer complaint of the symptoms described.
PARTS INFORMATION:
PRM9638
PROM MY 1995
PRM9636
PROM MY 1996
PRM9639
PROM MY 1997
LRNASTATK
Anti-Static Mat
NOTE:
PROM sets will only be released with the approval of the GEMS Helpline.
WARRANTY CLAIMS:
* 19.22.96
Time 1.05 hrs.
TestBook hookup, access codes, complete DTCR and diagnostic drive
cycle "C" per Service bulletin W97-007 *
18.30.89126
Time 0.50 hr Replace PROM set
19.22.17.75
Time 0.05 hr GEMS P-Code P1775
44.90.21
Time 0.05 hr Transmission Code Diagnosis
COMP CODE:
6U5A
Normal warranty policy and procedures apply
REPAIR PROCEDURE: