Jaguar XJ (X350). Manual — part 775

Non-Start

Engine cranks, but

does not fire

Engine breather system

disconnected/restricted

Check the engine breather

system hoses, separator, etc.

Rectify as necessary.

Difficult to

start

Difficult to start cold

Exhaust gas recirculation

(EGR) valve stuck open

Check the EGR valve,

Exhaust Gas Recirculation

(EGR) Valve (17.45.01) Check

the pipework.

Engine stalls

Engine stalls soon

after start

Breather system

disconnected/restricted

Check the engine breather

system hoses, separator, etc.

Rectify as necessary.

Engine stops/stalls

EGR valve stuck open

Check the EGR valve.

Exhaust Gas Recirculation

(EGR) Valve (17.45.01)

Rough

running

Poor idle quality

EGR valve stuck open

Check the EGR valve.

Exhaust Gas Recirculation

(EGR) Valve (17.45.01)

Poor

driveability

Engine

hesitates/poor

acceleration

EGR valve stuck open

Check the EGR valve.

Exhaust Gas Recirculation

(EGR) Valve (17.45.01)

Poor throttle

response

Breather system

disconnected/restricted

Check the engine breather

system hoses, separator, etc.

Rectify as necessary.

Excessive:

Fuel

consumption

Black smoke

Emissions

EGR valve stuck open

EGR system not operating

Crankcase ventilation

system restricted

Check the EGR valve.

Exhaust Gas Recirculation

(EGR) Valve (17.45.01) For EGR

valve circuit tests. GO to

Pinpoint Test G528708p1.

Check the engine breather

system hoses, separator, etc.

Rectify as necessary.

Noisy

Loud 'ticking' noise

with engine running

EGR pipes cracked

Inspect the EGR pipes, paying

particular attention to the

ribbed sections. Replace as

necessary.

Oil leakage

Engine oil leaks

Crankcase ventilation

system restricted

Check the engine breather

system hoses, separator, etc.

Rectify as necessary.

DTC index

NOTE:

Generic scan tools may not read the codes listed, or may read only 5-digit codes. Match the 5

digits from the scan tool to the first 5 digits of the 7-digit code listed to identify the fault (the last

2 digits give extra information read by the manufacturer-approved diagnostic system).

NOTE:

For a full list of DTCs.

Electronic Engine Controls - VIN Range: G45704->G99999 or

Electronic Engine Controls - VIN Range: G45704->G99999

DTC

Description

Possible causes

Action

P040100 EGR flow insufficient

EGR valve incorrectly fitted or

loose

EGR valve stuck closed,

blocked

EGR pipe blocked

EGR valve mechanical failure

Check the fitment of the

EGR valve.

Exhaust Gas Recirculation

(EGR) Valve (17.45.01)

Check the EGR pipework.

P041300

Secondary air injection

valve circuit

Secondary air valve control

circuit: short circuit to
power

For secondary air

injection valve circuit

tests, GO to Pinpoint

Test G528708p4.

P041400

Secondary air injection

valve circuit

Secondary air valve control

circuit: short circuit to
ground

Secondary air valve control

circuit: high resistance

For secondary air

injection valve circuit

tests, GO to Pinpoint

Test G528708p4.

P048900

Exhaust gas recirculation

(EGR) control circuit low

EGR valve power supply

circuit: short circuit to
ground

EGR valve power supply

circuit: high resistance

For EGR stepper circuit

tests, GO to Pinpoint

Test G528708p1.

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P049000

Exhaust gas recirculation

(EGR) control circuit high

EGR valve to ECM drive circuit:

short circuit to power

For EGR stepper circuit

tests, GO to Pinpoint

Test G528708p1.

P243100

Secondary air injection

system air flow/pressure

sensor circuit

range/performance

Secondary air injection

pump/valve/pipework
leaks

Secondary air injection pump

Secondary air injection valve

Check the secondary air

injection system

pipework, etc. For pump

tests. GO to Pinpoint

Test G528708p2.

For valve tests. GO to

Pinpoint Test

G528708p4.

P243200

Secondary air injection

system air flow/pressure

sensor circuit low

Secondary air injection

manifold pressure (MAP)
sensor circuit: short circuit
to ground

Secondary air injection

manifold pressure (MAP)
sensor circuit: high
resistance

For secondary air

injection MAP sensor

tests, GO to Pinpoint

Test G528708p3.

P243300

Secondary air injection

system air flow/pressure

sensor circuit high

Secondary air injection

manifold pressure (MAP)
sensor circuit: short circuit
to power

For secondary air

injection MAP sensor

tests, GO to Pinpoint

Test G528708p3.

P244400

Secondary air injection

system pump stuck ON

Secondary air injection pump

control circuit: short circuit
to ground

For secondary air

injection pump circuit

tests, GO to Pinpoint

Test G528708p2.

P244500

Secondary air injection

system pump stuck OFF

Secondary air injection pump

control circuit: short circuit
to power

For secondary air

injection pump circuit

tests, GO to Pinpoint

Test G528708p2.

Pinpoint tests

CAUTION: When probing connectors to take measurements in the course of the pinpoint

tests, use the adaptor kit, part number 3548-1358-00.

When performing electrical voltage or resistance tests, always use a digital multimeter (DMM)

accurate to 3 decimal places, and with an up-to-date calibration certificate. When testing

resistance, always take the resistance of the DMM leads into account.

NOTE:

Check and rectify basic faults before beginning diagnostic routines involving pinpoint tests.

PINPOINT TEST G528708p1 : CHECK
THE EGR STEPPER SUPPLY AND
CONTROL CIRCUITS

G528708t1 : CHECK THE EGR STEPPER SUPPLY VOLTAGE CIRCUITS

1. Key off. 2. Disconnect the EGR stepper electrical connector, PI15. 3. Key on, ignition off.

Make sure the EMS relay is energized. 4. Measure the voltage between:

EGR stepper connector, PI15

Battery

Pin 02

Negative terminal

Pin 05

Is the voltage less than 10 volts?

-> Yes

REPAIR the relevant EGR stepper supply voltage circuit. This circuit includes the front power

distribution box (fuse 14) and the EMS control relay. For additional information, refer to the wiring

diagrams. CLEAR the DTCs and test the system for normal operation.

-> No

GO to Pinpoint Test G528708t2.

G528708t2 : CHECK THE EGR STEPPER CONTROL CIRCUITS FOR SHORT
CIRCUIT TO GROUND

1. Key off. 2. Measure the resistance between:

NOTE:

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