Jaguar X-Type Sedan and Estate (Wagon). Manual - part 262

Published: 11-May-2011

Fuel Charging and Controls - 2.0L NA V6 - AJV6/2.5L NA V6 - AJV6/3.0L NA V6 - AJ27
- Fuel Charging and Controls2.5L NA V6 - AJV6/3.0L NA V6 - AJ27, VIN Range:
J28493->V99999

Diagnosis and Testing

1. Verify the customer concern by operating the system.

2. Visually inspect for obvious signs of mechanical or electrical damage.

3. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next

step.

4. If the concern is not visually evident, use a fault code reader to retrieve fault codes before proceeding to the Symptom Chart.

Symptom Chart

DTC

Condition

Possible Causes

Action

P0171

Right-hand bank
combustion too lean

Engine misfire
Air intake leak between MAF sensor
and throttle
Fuel injector restriction
Fuel filter/system restriction
fuel pulse damper failure (low fuel
pressure)
Low fuel pump output
HO2S (1/1; ½) harness wiring
condition fault
Exhaust leak (before catalyst)
engine control module (ECM)
receiving incorrect signal from one or
more of the following components;
ECT sensor, MAF sensor, IAT sensor,
IP sensor, EFT sensor, TP sensor

REFER to:

Engine Ignition - 2.5L NA V6 - AJV6/3.0L NA V6 - AJ27

(303-07A Engine Ignition - 2.0L NA V6 - AJV6/2.5L NA
V6 - AJV6/3.0L NA V6 - AJ27, Diagnosis and Testing),

Engine

(303-01A Engine - 2.0L NA V6 - AJV6/2.5L NA

V6 - AJV6/3.0L NA V6 - AJ27, Diagnosis and Testing),

Exhaust System

(309-00 Exhaust System, Diagnosis

and Testing),

Electronic Engine Controls - 2.5L NA V6 - AJV6/3.0L NA
V6 - AJ27, VIN Range: J28493->V99999

(303-14A

Electronic Engine Controls - 2.0L NA V6 - AJV6/2.5L NA
V6 - AJV6/3.0L NA V6 - AJ27, Diagnosis and Testing).

P0172

Right-hand bank
combustion too rich

Restricted air filter
Leaking fuel injector(s)
fuel pulse damper failure (high fuel
pressure)
ECM receiving incorrect signal from
one or more of the following
components; ECT sensor, MAF sensor,
IAT sensor, IP sensor, EFT sensor, TP
sensor

REFER to:

Intake Air Distribution and Filtering

(303-12A Intake

Air Distribution and Filtering - 2.0L NA V6 - AJV6/2.5L
NA V6 - AJV6/3.0L NA V6 - AJ27, Diagnosis and
Testing),

Electronic Engine Controls - 2.5L NA V6 - AJV6/3.0L NA
V6 - AJ27, VIN Range: J28493->V99999

(303-14A

Electronic Engine Controls - 2.0L NA V6 - AJV6/2.5L NA
V6 - AJV6/3.0L NA V6 - AJ27, Diagnosis and Testing).

P0174

Left-hand bank
combustion too lean

Engine misfire
Air intake leak between MAF sensor
and throttle
Fuel injector restriction
Fuel filter/system restriction
fuel pulse damper failure (low fuel
pressure)
Low fuel pump output
HO2S (2/1; 2/2) harness wiring
condition fault
Exhaust leak (before catalyst)
ECM receiving incorrect signal from
one or more of the following
components; ECT sensor, MAF sensor,
IAT sensor, IP sensor, EFT sensor, TP
sensor

REFER to:

Engine Ignition - 2.5L NA V6 - AJV6/3.0L NA V6 - AJ27

(303-07A Engine Ignition - 2.0L NA V6 - AJV6/2.5L NA
V6 - AJV6/3.0L NA V6 - AJ27, Diagnosis and Testing),

Engine

(303-01A Engine - 2.0L NA V6 - AJV6/2.5L NA

V6 - AJV6/3.0L NA V6 - AJ27, Diagnosis and Testing),

Exhaust System

(309-00 Exhaust System, Diagnosis

and Testing),

Electronic Engine Controls - 2.5L NA V6 - AJV6/3.0L NA
V6 - AJ27, VIN Range: J28493->V99999

(303-14A

Electronic Engine Controls - 2.0L NA V6 - AJV6/2.5L NA
V6 - AJV6/3.0L NA V6 - AJ27, Diagnosis and Testing).

P0175

Left-hand bank
combustion too rich

REFER to:

Intake Air Distribution and Filtering

(303-12A Intake

Air Distribution and Filtering - 2.0L NA V6 - AJV6/2.5L
NA V6 - AJV6/3.0L NA V6 - AJ27, Diagnosis and
Testing),

Electronic Engine Controls - 2.5L NA V6 - AJV6/3.0L NA
V6 - AJ27, VIN Range: J28493->V99999

(303-14A

Electronic Engine Controls - 2.0L NA V6 - AJV6/2.5L NA
V6 - AJV6/3.0L NA V6 - AJ27, Diagnosis and Testing).

P1251,
P1631,
P1657,
P1658

Concern with throttle
motor relay

Throttle motor relay
Throttle motor relay circuit

REFER to:

Electronic Engine Controls - 2.5L NA V6 -

AJV6/3.0L NA V6 - AJ27, VIN Range: J28493->V99999

(303-14A Electronic Engine Controls - 2.0L NA V6 -
AJV6/2.5L NA V6 - AJV6/3.0L NA V6 - AJ27, Diagnosis and
Testing).

P0112,
P0113

Concern with IAT
sensor

Engine faulty leading to overheating
Intake air temperature (IAT) sensor
fault
Harness fault
ECM failure

REFER to:

Acceleration Control

(310-02 Acceleration Control,

Diagnosis and Testing),

Electronic Engine Controls - 2.5L NA V6 - AJV6/3.0L NA
V6 - AJ27, VIN Range: J28493->V99999

(303-14A

Electronic Engine Controls - 2.0L NA V6 - AJV6/2.5L NA
V6 - AJV6/3.0L NA V6 - AJ27, Diagnosis and Testing).

P0121,
P0122,
P0123,
P0222,
P0223

Concern with throttle
position (TP) sensor

TP sensor fault
Harness fault
ECM failure

REFER to:

Electronic Engine Controls - 2.5L NA V6 -

AJV6/3.0L NA V6 - AJ27, VIN Range: J28493->V99999

(303-14A Electronic Engine Controls - 2.0L NA V6 -
AJV6/2.5L NA V6 - AJV6/3.0L NA V6 - AJ27, Diagnosis and
Testing).

DTC

Condition

Possible Causes

Action

P0116,
P0117,
P0118,
P0125

Concern with engine
coolant temperature

Engine coolant temperature sensor
Harness fault
ECM failure

REFER to:

Electronic Engine Controls - 2.5L NA V6 -

AJV6/3.0L NA V6 - AJ27, VIN Range: J28493->V99999

(303-14A Electronic Engine Controls - 2.0L NA V6 -
AJV6/2.5L NA V6 - AJV6/3.0L NA V6 - AJ27, Diagnosis and
Testing).

P0201,
P0202,
P0203,
P0204,
P0205,
P0206

Concern with fuel
injectors

Faulty injector(s)
Harness fault
ECM failure

REFER to:

Electronic Engine Controls - 2.5L NA V6 -

AJV6/3.0L NA V6 - AJ27, VIN Range: J28493->V99999

(303-14A Electronic Engine Controls - 2.0L NA V6 -
AJV6/2.5L NA V6 - AJV6/3.0L NA V6 - AJ27, Diagnosis and
Testing).

P0191

Concern with
injection pressure
(IP) sensor

fuel pulse damper sensor
Harness fault
Fuel filter/system restriction
Fuel system leak
Incorrect fuel pump output
IP sensor to ECM sensing circuit; high
resistance, open circuit, short circuit
to high voltage
IP sensor to splice in sensor supply
circuit; high resistance, open circuit
IP sensor to splice in sensor ground
circuit; high resistance, open circuit
IP sensor to splice in sensor ground
circuit; high resistance, open circuit,
short circuit to ground, short circuit to
high voltage
IP sensor failure

GO to Pinpoint Test

P0192

Concern with
injection pressure
(IP) sensor (low
voltage/low
pressure)

IP sensor disconnected
IP sensor to ECM sensing circuit;
open circuit or short circuit to ground
IP sensor to splice in sensor supply
circuit; high resistance, open circuit
IP sensor failure

GO to Pinpoint Test

P0193

Concern with
injection pressure
(IP) sensor (high
voltage/high
pressure)

IP sensor to ECM wiring
(supply/sense) short circuit to each
other
IP sensor to ECM sense circuit; short
circuit to high voltage
IP sensor to splice in sensor ground
circuit; open circuit
IP sensor failure

GO to Pinpoint Test

P0460

Concern with fuel
level sensors

Fuel level sensor to instrument
cluster circuit(s); intermittent short
circuit, open circuit, high resistance
Fuel level sensor failure
Instrument cluster fault

GO to Pinpoint Test

P0627,
P0628,
P0629

Concern with fuel
pump commands

ECM to fuel pump control module
control and/or feedback circuits; open
circuit, short circuit, high resistance
Fuel pump control module failure

GO to Pinpoint Test

P2635

Concern with fuel
pump operation

ECM to fuel pump control module
control and/or feedback circuits; open
circuit, short circuit, high resistance
Fuel pump control module failure

GO to Pinpoint Test

P1250,
P1254

Concern with throttle
valve return spring
and "limp-home"
spring

Throttle body

These DTCs can only be accurately diagnosed using the
Jaguar approved diagnostic system. If this is not available,
INSTALL a new throttle body.
REFER to:

Throttle Body

(303-04A Fuel Charging and

Controls - 2.0L NA V6 - AJV6/2.5L NA V6 - AJV6/3.0L NA V6 -
AJ27, Removal and Installation).
CLEAR the DTC, TEST the system for normal operation.

P2107

Concern with throttle
"watchdog circuit"
circuit

ECM

REFER to:

Electronic Engine Controls - 2.5L NA V6 -

AJV6/3.0L NA V6 - AJ27, VIN Range: J28493->V99999

(303-14A Electronic Engine Controls - 2.0L NA V6 -
AJV6/2.5L NA V6 - AJV6/3.0L NA V6 - AJ27, Diagnosis and
Testing).

P2118

Concern with throttle
motor control circuit

Throttle motor disconnected
Throttle motor to ECM drive circuits;
short circuit or open circuit
Throttle motor failure

GO to Pinpoint Test

P2119

Concern with throttle
control position

Throttle adaptions not performed
after battery disconnect
TP sensor disconnected
TP sensor to ECM sense circuits; open
circuit, high resistance
Throttle motor relay failure
Throttle motor relay to ECM circuit
fault
Throttle motor relay power supply
open circuit
ECM ground circuit fault (relay coil
drive)
Throttle motor to ECM drive circuits;

REFER to:

Electronic Engine Controls - 2.5L NA V6 -

AJV6/3.0L NA V6 - AJ27, VIN Range: J28493->V99999

(303-14A Electronic Engine Controls - 2.0L NA V6 -
AJV6/2.5L NA V6 - AJV6/3.0L NA V6 - AJ27, Diagnosis and
Testing). Individual Pinpoint tests for components and
circuits listed

1
2
3

1
2

1
2
3

DTC

Condition

Possible Causes

Action

open circuit, short circuit, high
resistance
Throttle motor failure
Throttle body failure

P1656

Concern with TP
sensor amplifier
circuit

ECM

REFER to:

Electronic Engine Controls - 2.5L NA V6 -

AJV6/3.0L NA V6 - AJ27, VIN Range: J28493->V99999

(303-14A Electronic Engine Controls - 2.0L NA V6 -
AJV6/2.5L NA V6 - AJV6/3.0L NA V6 - AJ27, Diagnosis and
Testing).

PINPOINT TEST A : FUEL INJECTORS, P0201, P0202, P0203, P0204, P0205, P0206.

• NOTE: The DTC set will indicate which cylinder injector or circuit is faulty. Only in the event of multiple cylinder misfires will it be
necessary to check more than one injector or circuit, in which case, multiple DTCs will be set.

TEST

CONDITIONS

DETAILS/RESULTS/ACTIONS

A1: CHECK THE INJECTOR COIL RESISTANCE

Turn the ignition switch to the OFF position.
Disconnect the relevant injector electrical connector (IL1 to 6).
Measure the resistance between the injector pins.

Is the resistance between 12 and 16 ohms?
Yes

GO to A2

INSTALL a new injector.
REFER to:

Fuel Injectors

(303-04A Fuel Charging and Controls - 2.0L NA V6 - AJV6/2.5L NA V6 - AJV6/3.0L NA V6 -

AJ27, Removal and Installation).
CLEAR the DTC. TEST the system for normal operation.

A2: CHECK THE INJECTOR COIL INSULATION

Measure the resistance between the injector pin 1 and the injector body.
Measure the resistance between the injector pin 2 and the injector body.

Are both resistances greater than 10 OHMS?
Yes

GO to A3

INSTALL a new injector.
REFER to:

Fuel Injectors

(303-04A Fuel Charging and Controls - 2.0L NA V6 - AJV6/2.5L NA V6 - AJV6/3.0L NA V6 -

AJ27, Removal and Installation).
CLEAR the DTC. TEST the system for normal operation.

A3: CHECK THE INJECTOR SUPPLY VOLTAGE

Turn the ignition switch to the ON position.
Disconnect the relevant injector harness electrical connector (IL1 to 6).
Measure the voltage between the relevant injector harness electrical connector (IL1 to 6) pin 2 and GROUND.

Is the voltage greater than 12 Volts?
Yes

GO to A4

REPAIR the circuit between the relevant injector harness electrical connector, (IL1 to 6) pin 2 and battery. This circuit
includes the power distribution fuse box, fuse 41, and the EMS control relay. For additional information, refer to wiring
diagrams. CLEAR DTC. TEST the system for normal operation.

A4: CHECK THE INJECTOR GROUND CIRCUIT

Turn the ignition switch to the OFF position.
Disconnect the ECM electrical connector EN16.
Measure the resistance between the relevant injector harness electrical connector (IL1 to 6) pin 1 and EN16 pins as
follows -

Injector 1 pin 1 (NW) and ECM pin 115.
Injector Cyl 3 pin 1 (N) and ECM pin 114.
Injector Cyl 5 pin 1 (NR) and ECM pin 113.
Injector Cyl 2 pin 1 (NU) and ECM pin 120.
Injector Cyl 4 pin 1 (NG) and ECM pin 119.
Injector Cyl 6 pin 1 (NY) and ECM pin 118.

Is the resistance less than 5 ohms?
Yes

GO to A5

REPAIR the circuit between the relevant injector harness electrical connector pin 1 and the ECM electrical connector.
For additional information, refer to wiring diagrams. CLEAR the DTC. TEST the system for normal operation.

A5: CHECK THE INJECTOR GROUND CIRCUIT FOR SHORT CIRCUIT TO BATTERY

Measure the voltage between the relevant injector harness electrical connector (IL1 to 6) pin 1 and GROUND.

Is the voltage greater than 1 volt?
Yes

REPAIR the short circuit. For additional information, refer to wiring diagrams. CLEAR the DTC. TEST the system for
normal operation.

GO to A6

A6: CHECK THE INJECTOR GROUND CIRCUIT FOR SHORT CIRCUIT TO GROUND

Measure the resistance between the relevant injector harness electrical connector (IL1 to 6) pin 1 and GROUND.

Is the resistance less than 10,000 ohms?
Yes

REPAIR the short circuit. For additional information, refer to wiring diagrams. CLEAR the DTC. TEST the system for
normal operation.

INSTALL a new ECM.
REFER to:

Engine Control Module (ECM)

(303-14A Electronic Engine Controls - 2.0L NA V6 - AJV6/2.5L NA V6 -

AJV6/3.0L NA V6 - AJ27, Removal and Installation).

1
2
3
4

1
2

Before replacing a ECM, contact Dealer technical support.

PINPOINT TEST B : FUEL PULSE DAMPER SENSOR. P0190, P0192, P0193

TEST

CONDITIONS

DETAILS/RESULTS/ACTIONS

B1: CHECK THE FUEL PULSE DAMPER SENSOR SUPPLY VOLTAGE

Turn the ignition switch to the OFF position.
Disconnect the fuel pulse damper sensor electrical connector IL007.
Turn the ignition switch to the ON position.
Measure the supply voltage to the fuel pulse damper sensor electrical connector IL007 pin 1 (YG) and GROUND.

Is the supply voltage between 4.5 and 5.5 volts?
Yes

GO to B2

REPAIR the circuit between IL007 pin 1, (YG) and ENS07. For additional information, refer to wiring diagrams. CLEAR
the DTC. TEST the system for normal operation. If the DTC is repeated, INSTALL a new ECM.
REFER to:

Engine Control Module (ECM)

(303-14A Electronic Engine Controls - 2.0L NA V6 - AJV6/2.5L NA V6 -

AJV6/3.0L NA V6 - AJ27, Removal and Installation).
Before replacing a ECM, contact Dealer technical support.

(The fault could be in any of the components or sensors in the 5 volt supply circuit, or the ECM)

B2: CHECK THE FUEL PULSE DAMPER SENSOR GROUND CIRCUIT FOR OPEN CIRCUIT

Turn the ignition switch to the OFF position.
Measure the resistance between the fuel pulse damper sensor electrical connector IL007 pin 2, (WG) and GROUND.

Is the resistance greater than 10,000 ohms?
Yes

REPAIR the circuit between IL007 pin 2 (W G) and ground at ILS02. For additional information, refer to wiring
diagrams. CLEAR the DTC. TEST the system for normal operation.

GO to B3

B3: CHECK THE FUEL PULSE DAMPER SENSOR SIGNAL CIRCUIT FOR OPEN CIRCUIT

Disconnect the ECM electrical connector EN16.
Measure the resistance between the fuel pulse damper sensor electrical connector IL007 pin 3 (WG) and EN16 pin 73.

Is the resistance greater than 5 ohms?
Yes

REPAIR the circuit between IL007 pin 3 (W G) and EN016 pin 73 (WG). For additional information, refer to wiring
diagrams. CLEAR the DTC. TEST the system for normal operation.

GO to B4

B4: CHECK THE FUEL PULSE DAMPER SENSOR SIGNAL CIRCUIT FOR SHORT TO GROUND

Measure the resistance between the fuel pulse damper sensor electrical connector IL007 pin 3 (WG) and GROUND.

Is the resistance less than 10,000 ohms?
Yes

REPAIR the circuit between IL007 pin 3 (W G) and EN016 pin 73 (WG). For additional information, refer to wiring
diagrams. CLEAR the DTC. TEST the system for normal operation.

GO to B5

B5: CHECK THE FUEL PULSE DAMPER SENSOR CIRCUIT RESISTANCE

Disconnect the fuel pulse damper sensor electrical connector IL007.
Measure the resistance between the fuel pulse damper sensor pins 1 and 2.

Is the resistance between 10,000 and 12,000 ohms?
Yes

GO to B6

Install a new fuel pulse damper sensor.
REFER to:

Fuel Pulse Damper - 2.5L NA V6 - AJV6/3.0L NA V6 - AJ27

(303-04A Fuel Charging and Controls - 2.0L NA

V6 - AJV6/2.5L NA V6 - AJV6/3.0L NA V6 - AJ27, Removal and Installation).
CLEAR the DTC. TEST the system for normal operation.

B6: CHECK THE FUEL PULSE DAMPER SENSOR CIRCUIT RESISTANCE

Measure the resistance between the fuel pulse damper sensor pins 2 and 3.

Is the resistance between 22,000 and 33,000 ohms?
Yes

GO to B7

Install a new fuel pulse damper sensor.
REFER to:

Fuel Pulse Damper - 2.5L NA V6 - AJV6/3.0L NA V6 - AJ27

(303-04A Fuel Charging and Controls - 2.0L NA

V6 - AJV6/2.5L NA V6 - AJV6/3.0L NA V6 - AJ27, Removal and Installation).
CLEAR the DTC. TEST the system for normal operation.

B7: CHECK THE FUEL PULSE DAMPER SENSOR CIRCUIT RESISTANCE

Measure the resistance between the fuel pulse damper sensor pins 1 and 3.

Is the resistance between 22,000 and 33,000 ohms?
Yes

Install a new ECM.
REFER to:

Electronic Engine Controls - 2.5L NA V6 - AJV6/3.0L NA V6 - AJ27, VIN Range: J28493->V99999

(303-14A

Electronic Engine Controls - 2.0L NA V6 - AJV6/2.5L NA V6 - AJV6/3.0L NA V6 - AJ27, Diagnosis and Testing).
Before replacing a ECM, contact Dealer technical support.

Install a new fuel pulse damper sensor.
REFER to:

Fuel Pulse Damper - 2.5L NA V6 - AJV6/3.0L NA V6 - AJ27

(303-04A Fuel Charging and Controls - 2.0L NA

V6 - AJV6/2.5L NA V6 - AJV6/3.0L NA V6 - AJ27, Removal and Installation).
CLEAR the DTC. TEST the system for normal operation.

PINPOINT TEST C : FUEL LEVEL SENSORS. P0460

TEST

CONDITIONS

DETAILS/RESULTS/ACTIONS

C1: CHECK THE FUEL LEVEL SENSOR (1) GROUND CIRCUIT

Disconnect the fuel level sensor electrical connector FT2.

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