Jaguar XJ (X350). Service manual — part 629

(19.70.04)

P210664

Throttle actuator

control system - forced

limited power

•

Signal plausibility failure

Check for a message in the

instrument cluster.

Replace the throttle body.

Throttle Body - VIN Range:

G45704->G99999

(19.70.04)

P211800

Throttle actuator motor

control current

range/performance

•

Control circuit: short circuit
to power, short circuit to
ground, high resistance

•

ECM fault

For throttle actuator

motor circuit tests, GO to

Pinpoint Test G531324p3.

Refer to the warranty

policy and procedures

manual if an ECM is

suspect.

P211900

Throttle actuator

control throttle body

range/performance

•

Throttle spring faulty

Check for a message in the

instrument cluster.

Replace the throttle body.

Throttle Body - VIN Range:

G45704->G99999

(19.70.04)

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.

NOTE:

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 G531324p1 : FUEL
INJECTORS

G531324t1 : CHECK THE INJECTOR COIL RESISTANCE

1. Disconnect the relevant injector electrical connector:

Injector connector

Cylinder 1, IL03

Cylinder 2, IL06

Cylinder 3, IL04

Cylinder 4, IL07

Cylinder 5, IL05

Cylinder 6, IL08

2. Measure the resistance between the injector pins.

•

Is the resistance between 12 and 16 ohms?

-> Yes

GO to Pinpoint Test G531324t2.

-> No

INSTALL a new injector.

Fuel Injectors (18.10.02) CLEAR the DTC and test the system for normal operation.

G531324t2 : CHECK THE INJECTOR COIL INSULATION

1. Measure the resistance between:

Injector, component side Injector body

Pin 01

Injector body

Pin 02

Injector body

•

Is either resistance less than 10,000 ohms?

www.

-> Yes

INSTALL a new injector.

Fuel Injectors (18.10.02) CLEAR the DTC and test the system for normal operation.

-> No

GO to Pinpoint Test G531324t3.

G531324t3 : CHECK THE INJECTOR SUPPLY VOLTAGE

1. Key on, engine off. 2. Make sure the EMS relay is energized. 3. Measure the voltage between:

Injector connector, harness side

Battery

Pin 02

Negative terminal

•

Is the voltage less than 10 Volts?

-> Yes

REPAIR the circuit between the relevant injector harness electrical connector pin 02 and battery. This

circuit includes fuse 13 of the front power distribution box and the EMS relay. For additional

information, refer to the wiring diagrams. CLEAR the DTC and test the system for normal operation.

-> No

GO to Pinpoint Test G531324t4.

G531324t4 : CHECK THE INJECTOR CONTROL CIRCUIT FOR SHORT CIRCUIT
TO GROUND

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

Injector connector, harness side

Battery

Pin 01

Negative terminal

•

Is the resistance less than 10,000 ohms?

-> Yes

REPAIR the short circuit. For additional information, refer to the wiring diagrams. CLEAR the DTC and

test the system for normal operation.

-> No

GO to Pinpoint Test G531324t5.

G531324t5 : CHECK THE INJECTOR CONTROL CIRCUIT FOR SHORT CIRCUIT
TO POWER

1. Measure the resistance between:

Injector connector, harness side

Battery

Pin 01

Positive terminal

•

Is the resistance less than 10,000 ohms?

-> Yes

REPAIR the short circuit. For additional information, refer to the wiring diagrams. CLEAR the DTC and

test the system for normal operation.

-> No

GO to Pinpoint Test G531324t6.

G531324t6 : CHECK THE INJECTOR CONTROL CIRCUIT FOR HIGH
RESISTANCE

1. Disconnect the ECM electrical connector PI300. 2. Measure the resistance between:

Cylinder 1 injector connector, harness side ECM connector PI300, harness side

IL03, pin 01

Pin 78

Cylinder 2 injector connector, harness side ECM connector PI300, harness side

IL06, pin 01

Pin 79

Cylinder 3 injector connector, harness side ECM connector PI300, harness side

IL04, pin 01

Pin 80

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