Jaguar XJ (X350). Manual — part 623

performance

Amber

Gearbox

fault/Restricted

performance

Limp-home

P1783

Default mode Definitions

LIMP-HOME MODE

•

Throttle motor off

•

Throttle motor relay off

•

Throttle motor circuit off

•

Fuel intervention

•

Cruise control inhibited

LIMP-HOME UNAVAILABLE

•

Power limitation

•

Vehicle speed limited to 120 kph

•

Reverse throttle progression enabled

•

Cruise control Inhibited

REVERSE THROTTLE PROGRESSION

•

Throttle opening limited to maximum 30%

NOTE:

The throttle operation uses the same map as for reverse gear.

ENGINE SPEED LIMITED

•

Engine runs normally, up to 3000 rpm

•

Engine speed restricted to 3000 rpm maximum, by fuel cut-off

HIGH IDLE

•

Throttle valve kept in fixed position by motor

•

Cruise control Inhibited

SAFETY REDUNDANCY

•

Power limitation

•

Vehicle speed limited to 120 kph

•

Reverse throttle progression enabled

•

Cruise Control Inhibited

Diagnostic Trouble Code (DTC) index

DTC

Condition

Possible Causes

Action

P0171

Right-hand cylinders

combustion too lean

•

Air intake leak between
mass air flow (MAF) sensor
and cylinder head

•

Fuel filter/system
restriction

•

Fuel injector restriction

•

Fuel rail pressure (FRP)
sensor fault (low fuel
pressure)

•

Low fuel pump output

•

HO2S/catalyst monitor
sensor harness wiring
condition fault

•

EFT sensor fault (low fuel
temperature)

•

Mass air flow (MAF) sensor
fault (low intake air flow)

•

Exhaust leak (before
catalyst)

•

ECM receiving incorrect
signal from one or more of
the following sensors; ECT,
MAF*, IAT, fuel rail
temperature

For intake system, <<303-

12>> For fuel injector,

Fuel Injectors (18.10.02)

For fuel filter and pump,

<<310-01>> For FRP sensor

circuit tests, GO to Pinpoint

Test G206886p2.

. For HO2S/Catalyst

monitor sensor tests,

<<303-14>> For exhaust

system, <<309-00>> For

sensor tests, <<303-14>> *

If this DTC is flagged, pay

particular attention to the

MAF sensor.

P0172

Right-hand cylinders

combustion too rich

•

Engine misfire

•

Restricted air filter

•

Leaking fuel injector(s)

•

FRP sensor failure (high
fuel pressure)

•

EFT sensor fault (high fuel
temperature)

•

MAF sensor fault (high
intake air flow)

•

HO2S/catalyst monitor
sensor harness wiring
condition fault

•

ECM receiving incorrect
signal from one or more of
the following sensors; ECT,
MAF, IAT, FRP, EFT.

Check for "misfire

detected" DTCs in this

section; For intake system,

<<303-12>> For fuel

injector,

Fuel Injectors (18.10.02)

For FRP sensor circuit tests,

GO to Pinpoint Test

G206886p2.

. For other sensor tests,

<<303-14>>

P0174

Left-hand cylinders

combustion too lean

•

Air intake leak between
MAF sensor and cylinder
head

•

Fuel filter/system
restriction

For intake system, <<303-

12>> For fuel injectors,

Fuel Injectors (18.10.02)

For fuel filter, pump and

www.

•

Fuel injector restriction

•

FRP sensor failure (low fuel
pressure)

•

Low fuel pump output

•

HO2S/catalyst monitor
sensor harness wiring
condition fault

•

EFT sensor fault (low fuel
temperature)

•

Mass air flow (MAF) sensor
fault (low intake air flow)

•

Exhaust leak (before
catalyst)

•

ECM receiving incorrect
signal from one or more of
the following sensors; ECT,
MAF*, IAT, FRP, EFT, TP.

lines, <<310-01>> For

HO2S/catalyst monitor

sensor tests, <<303-14>>

For exhaust system, <<309-

00>> For FRP sensor tests,

GO to Pinpoint Test

G206886p2.

. For other sensor tests,

<<303-14>> * If this DTC is

flagged, pay particular

attention to the MAF

sensor.

P0175

Left-hand cylinders

combustion too rich

•

Engine misfire

•

Restricted air filter

•

Leaking fuel injector(s)

•

FRP sensor failure (high
fuel pressure)

•

ECM receiving incorrect
signal from one or more of
the following sensors; ECT,
MAF, IAT, fuel rail pressure,
fuel rail temperature

Check for "misfire

detected" DTCs in this

section. For intake system,

<<303-12>> For fuel

injectors,

Fuel Injectors (18.10.02)

For FRP sensor tests, GO to

Pinpoint Test G206886p2.

. For other sensor tests,

<<303-14>>

P0191

Fuel rail pressure (FRP)

sensor circuit

range/performance

•

Fuel filter/system
restriction

•

Fuel system leak

•

Incorrect fuel pump output

•

FRP sensor to ECM sensing
circuit; high resistance,
open circuit, short circuit
to high voltage

•

FRP sensor to splice in
sensor supply circuit; high
resistance, open circuit

•

FRP sensor to splice in
sensor ground circuit; high
resistance, open circuit,
short circuit to ground,
short circuit to high voltage

•

FRP sensor failure

For fuel filter, pump and

lines, <<310-01>> For FRP

sensor tests, GO to Pinpoint

Test G206886p2.

.

P0192 Fuel rail pressure (FRP)

sensor circuit low voltage

•

FRP sensor disconnected

•

FRP sensor to ECM sensing

For FRP sensor tests, GO to

Pinpoint Test G206886p2.

(low pressure)

circuit; open circuit or
short circuit to ground

•

FRP sensor to splice in
sensor supply circuit; high
resistance, open circuit

•

FRP sensor failure

.

P0193

Fuel rail pressure (FRP)

sensor circuit high voltage

(high pressure)

•

FRP sensor to ECM wiring
(supply/sense); short
circuit to each other

•

FRP sensor to ECM sense
circuit; short circuit to high
voltage

•

FRP sensor to splice in
sensor ground circuit; open
circuit

•

FRP sensor failure

For FRP sensor tests, GO to

Pinpoint Test G206886p2.

.

P0201

Fuel injector circuit

malfunction, Cyl 1

•

Injector disconnected

•

Injector wiring open or
short circuit

•

Injector failure

For fuel injectors,

Fuel Injectors (18.10.02)

For fuel injector circuit

tests, GO to Pinpoint Test

G206886p1.

.

P0202

Fuel injector circuit

malfunction, Cyl 2

•

Injector disconnected

•

Injector wiring open or
short circuit

•

Injector failure

For fuel injectors,

Fuel Injectors (18.10.02)

For fuel injector circuit

tests, GO to Pinpoint Test

G206886p1.

.

P0203

Fuel injector circuit

malfunction, Cyl 3

•

Injector disconnected

•

Injector wiring open or
short circuit

•

Injector failure

For fuel injectors,

Fuel Injectors (18.10.02)

For fuel injector circuit

tests, GO to Pinpoint Test

G206886p1.

.

P0204

Fuel injector circuit

malfunction, Cyl 4

•

Injector disconnected

•

Injector wiring open or
short circuit

•

Injector failure

For fuel injectors,

Fuel Injectors (18.10.02)

For fuel injector circuit

tests, GO to Pinpoint Test

G206886p1.

.

www.