Jaguar XJ (X350). Manual — part 767

Circuit

Pin

Cylinder 1 output Pin 01

Cylinder 2 output Pin 02

Cylinder 3 output Pin 03

Cylinder 4 output Pin 04

Cylinder 5 output Pin 05

Cylinder 6 output Pin 06

3.

Circuit

Pin

Cylinder 1 01

Cylinder 2 02

Cylinder 3 03

4.

Circuit

Pin

Cylinder 4 01

Cylinder 5 02

Cylinder 6 03

5. Disconnect the glow plug module connector, EC73 (this is an eyelet). 6. Measure the voltage

between:

EC73, harness side

Battery

Pin 01

Negative terminal

Is the voltage greater than 10 volts?

-> Yes

GO to Pinpoint Test G552799t7.

-> No

REPAIR the permanent power supply circuit. This circuit includes the 100A midi fuse. For additional

information, refer to the wiring diagrams. Clear any DTCs, test the system for normal operation.

G552799t7 : CHECK THE IGNITION POWER SUPPLY TO THE GPCM

1. Disconnect the glow plug module connector, EC69. 2. Key on, engine off.

Make sure the EMS relay is energized 3. Measure the voltage between:

EC69, harness side

Battery

Pin 03

Negative terminal

Is the voltage greater than 10 volts?

-> Yes

GO to Pinpoint Test G552799t8.

-> No

REPAIR the ignition power supply circuit. This circuit includes fuse 9 of the front power distribution

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box. For additional information, refer to the wiring diagrams. Clear any DTCs, test the system for

normal operation.

G552799t8 : CHECK THE GROUND TO THE GPCM

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

EC69, harness side

Battery

Pin 01

Negative terminal

Is the resistance less than 10 ohms?

-> Yes

GO to Pinpoint Test G552799t9.

-> No

REPAIR the high resistance circuit. For additional information, refer to the wiring diagrams. Clear any

DTCs, test the system for normal operation.

G552799t9 : CHECK THE GLOW PLUG OUTPUT CIRCUITS FOR SHORT
CIRCUIT TO GROUND

1. Key off. 2. Disconnect the glow plug module connector, EC74 3. Disconnect the glow plug

connectors, EC76 and EC77. 4. Measure the resistance between:

EC76, harness side

Battery

Pin 01

Negative terminal

Pin 02

Pin 03

EC77, harness side

Battery

Pin 04

Negative terminal

Pin 05

Pin 06

Is the resistance greater than 100 Kohms?

-> Yes

GO to Pinpoint Test G552799t10.

-> No

REPAIR the short circuit. For additional information, refer to the wiring diagrams. Clear any DTCs, test

the system for normal operation.

G552799t10 : CHECK THE GLOW PLUG OUTPUT CIRCUITS FOR SHORT
CIRCUIT TO POWER

1. Measure the resistance between:

EC76, harness side

Battery

Pin 01

Positive terminal

Pin 02

Pin 03

EC77, harness side

Battery

Pin 04

Positive terminal

Pin 05

Pin 06

Is the resistance greater than 100 Kohms?

-> Yes

GO to Pinpoint Test G552799t11.

-> No

REPAIR the short circuit. For additional information, refer to the wiring diagrams. Clear any DTCs, test

the system for normal operation.

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