Discovery I (LJ) V8-4.0L (1996)
Engine Control Module: Customer Interest
Engine Controls - MIL ON/Trailing Throttle Misfire
No:
19/03/98/NAS
Ref:
Issue:
1
Date:
10/02/98
Pride - Trailing Throttle Misfire Diagnosis
AFFECTED VEHICLE RANGE:
DISCOVERY (LJ)
1996
SITUATION:
When investigating the source of a misfire code on 1996 Discovery models it is very important to pay close attention to the freeze frame data obtained by
using TestBook. This information can identify engine parameters which relate to trailing throttle. See the description in the "Symptom Description..."
section below.
RESOLUTION:
When trailing throttle misfire is suspected as the cause for MIL illumination, perform the diagnosis and repair outline in this procedure.
PARTS INFORMATION:
PRM9637
PROM 1996 Automatic
PRM9630
PROM 1996 Manual
LRNASTATKAnti-static Mat
WARRANTY CLAIMS:
19.22.96
Time 1.25 hr.
TestBook Codes DTCR and Drive Cycle "C" per Bulletin W96.007
*19.22.03.0X
Time 0.05 hr.
*X = Number of cylinder misfiring
18.30.89.26
Time 0.50 hr.
Replace PROM
FAULT CODE: Z
Normal warranty policy and procedures apply
REPAIR PROCEDURE
TESTBOOK
1.
Hook up TestBook and follow directions to retrieve fault codes.