V8 Engine Management System: Description and Operation
ENGINE MANAGEMENT SYSTEM - V8
18-2-34 DESCRIPTION AND OPERATION
In the event of fuel injector signal failure any of the following symptoms may be observed:
l
Rough running.
l
Difficult starting.
l
Engine misfire.
l
Possible catalyst damage.
l
High emissions.
l
Adaptive fuelling disabled.
l
Adaptive idle speed control disabled.
The ECM performs three types of fuel injector diagnostic check:
l
Output short circuit to earth
l
Output short circuit to battery voltage
l
Output open circuit
Should a malfunction of the component occur the following fault codes may be evident and can be retrieved by
TestBook:
P Code
J2012 Description
Land Rover Description
P0201
Injection circuit malfunction - cylinder 1
Injector 1 open circuit
P0261
Cylinder 1 injector circuit low
Injector 1 short circuit to earth
P0262
Cylinder 1 injector circuit high
Injector 1 short circuit to battery supply
P0301
Cylinder 1 misfire detected
Injector 1 excess emissions/catalyst damaging level of
misfire
P0202
Injection circuit malfunction - cylinder 2
Injector 2 open circuit
P0264
Cylinder 2 injector circuit low
Injector 2 short circuit to earth
P0265
Cylinder 2 injector circuit high
Injector 2 short circuit to battery supply
P0302
Cylinder 2 misfire detected
Injector 2 excess emissions/catalyst damaging level of
misfire
P0203
Injection circuit malfunction - cylinder 3
Injector 3 open circuit
P0267
Cylinder 3 injector circuit low
Injector 3 short circuit to earth
P0268
Cylinder 3 injector circuit high
Injector 3 short circuit to battery supply
P0303
Cylinder 3 misfire detected
Injector 3 excess emissions/catalyst damaging level of
misfire
P0204
Injection circuit malfunction - cylinder 4
Injector 4 open circuit
P0270
Cylinder 4 injector circuit low
Injector 4 short circuit to earth
P0271
Cylinder 4 injector circuit high
Injector 4 short circuit to battery supply
P0304
Cylinder 4 misfire detected
Injector 4 excess emissions/catalyst damaging level of
misfire
P0205
Injection circuit malfunction - cylinder 5
Injector 5 open circuit
P0273
Cylinder 5 injector circuit low
Injector 5 short circuit to earth
P0274
Cylinder 5 injector circuit high
Injector 5 short circuit to battery supply
P0305
Cylinder 5 misfire detected
Injector 5 excess emissions/catalyst damaging level of
misfire
P0206
Injection circuit malfunction - cylinder 6
Injector 6 open circuit
P0276
Cylinder 6 injector circuit low
Injector 6 short circuit to earth
P0277
Cylinder 6 injector circuit high
Injector 6 short circuit to battery supply
P0306
Cylinder 6 misfire detected
Injector 6 excess emissions/catalyst damaging level of
misfire
P0207
Injection circuit malfunction - cylinder 7
Injector 7 open circuit
P0279
Cylinder 7 injector circuit low
Injector 7 short circuit to earth
P0280
Cylinder 7 injector circuit high
Injector 7 short circuit to battery supply
P0307
Cylinder 7 misfire detected
Injector 7 excess emissions/catalyst damaging level of
misfire
P0208
Injection circuit malfunction - cylinder 8
Injector 8 open circuit
P0282
Cylinder 8 injector circuit low
Injector 8 short circuit to earth
P0283
Cylinder 8 injector circuit high
Injector 8 short circuit to battery supply