Jaguar XJ (X350). Manual — part 739

Starter relay failure

G557182p2.

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. Failure to follow this instruction may result

in damage to the vehicle.

NOTE:

When performing 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.

NOTE:

If diagnostic trouble codes (DTCs) are recorded and the symptom is not present when

performing the pinpoint tests, an intermittent concern may be the cause. Always check for loose

connections and corroded terminals.

PINPOINT TEST G557182p1 : BASE
STARTER CIRCUIT TESTS

G557182t1 : CHECK THE SUPPLY VOLTAGE AT THE STARTER MOTOR

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

Starter motor

Battery

Permanent supply terminal Negative terminal

Is the voltage greater than 10 volts?

-> Yes

GO to Pinpoint Test G557182t2.

-> No

REPAIR the battery power supply circuit as necessary. For additional information, refer to the wiring

diagrams. Test the system for normal operation.

G557182t2 : CHECK THE GROUND AT THE STARTER MOTOR

1. Measure the resistance between:

Starter motor

Battery

Outer casing

Negative terminal

Is the resistance less than 10 ohms?

-> Yes

GO to Pinpoint Test G557182t3.

-> No

REPAIR the ground circuit as necessary. For additional information, refer to the wiring diagrams. Test

the system for normal operation.

G557182t3 : BYPASS THE RELAY START SIGNAL

1. Disconnect the starter solenoid connector:

Vehicle

Connector

3.0L/3.5L/4.2L VIN Range: G00442->G45703 EL2

3.0L/3.5L/4.2L VIN Range: G45704->G99999 PI62

2.7L Diesel

C60

2. Connect a suitable remote start device between the starter solenoid connection and battery

positive. 3. Operate the remote start device.

Does the engine crank?

-> Yes

CHECK the starter relay circuits. GO to Pinpoint Test G557182p2.

www.

-> No

INSTALL a new starter motor.

Starter Motor - 4.2L NA V8 - AJV8/4.2L SC V8 - AJV8/3.0L NA V6 - AJ27/3.5L NA V8 - AJV8 (86.60.01)

Starter Motor - 2.7L V6 - TdV6 (86.60.01) Test the system for normal operation.

PINPOINT TEST G557182p2 : STARTER
RELAY CIRCUIT TESTS

G557182t4 : CHECK THE STARTER RELAY OUTPUT VOLTAGE AT THE
SOLENOID

1. Engine control module connector, PI1 (3.0L/3.5L/4.2L VIN Range: G00442->G45703)

Circuit

Pin

Crank request

06

Starter relay - control 41

2. Engine control module connector, EC300 (3.0L/3.5L/4.2L VIN Range: G45704->G99999)

Circuit

Pin

Crank request

17

Starter relay - control 51

3. Engine control module connector, EC66 (2.7L Diesel)

Circuit

Pin

Crank request

F3

Starter relay - control B1

4. Front power distribution box connector, EC04

Circuit

Pin

Starter motor solenoid - supply 03

5. Front power distribution box connector, EC41

Circuit

Pin

Starter motor relay - switched supply 01

6. Front power distribution box connector, EC28

Circuit

Pin

Starter motor relay - control 08

7. Key off. 8. Disconnect the starter solenoid connector (this is an eyelet):

Vehicle

Connector

3.0L/3.5L/4.2L VIN Range: G00442->G45703 EL2

3.0L/3.5L/4.2L VIN Range: G45704->G99999 PI62

2.7L Diesel

C60

9. Key on, engine cranking. 10. Measure the voltage between:

Connector, component side

Battery

EL2

Negative terminal

PI62

C60

Is the voltage greater than 10 volts?

-> Yes

RECHECK the starter motor. Possible connection fault between the starter motor solenoid connector

and the solenoid. Rectify as necessary, test the system for normal operation.

-> No

www.