Jaguar XJ (X350). Manual — part 759

Cyl 6 PI08, pin 04 (GR) and PI01, pin 63 (GR).

Cyl 7 PI05, pin 04 (GR) and PI01, pin 90 (GR).

Cyl 8 PI09, pin 04 (YR) and PI01, pin 64 (YR).

Is the resistance greater than 5 ohms?

-> Yes

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

DTCs. TEST the system for normal operation.

-> No

GO to Pinpoint Test G290076t5.

G290076t5 : CHECK THE IGNITION COIL (CYLS 1, 4, 6, AND 7) MONITOR
CIRCUITS FOR HIGH RESISTANCE

1. Disconnect the relevant ignition coil electrical connector(s), (PI02 to PI09). 2. Measure the

resistance between:

Cyl 1 PI02, pin 02 (GB) and PI01, pin 131 (GB).

Cyl 4 PI07, pin 02 (GB) and PI01, pin 131 (GB).

Cyl 6 PI08, pin 02 (GB) and PI01, pin 131 (GB).

Cyl 7 PI05, pin 02 (GB) and PI01, pin 131 (GB).

Is the resistance greater than 5 ohms?

-> Yes

REPAIR the high resistance circuit. This circuit includes the harness splice, PIS09. For additional

information, refer to the wiring diagrams. CLEAR the DTCs. TEST the system for normal operation.

-> No

GO to Pinpoint Test G290076t6.

G290076t6 : CHECK THE IGNITION COIL (CYLS 1, 4, 6, AND 7) MONITOR
CIRCUITS FOR SHORT TO B+ VOLTAGE

1. Reconnect the battery negative terminal. 2. Disconnect the relevant ignition coil electrical

connector(s), (PI02 to PI09). 3. Measure the voltage between:

Cyl 1 PI02, pin 02 (GB) and GROUND.

Cyl 4 PI07, pin 02 (GB) and GROUND.

Cyl 6 PI08, pin 02 (GB) and GROUND.

Cyl 7 PI05, pin 02 (GB) and GROUND.

Is the voltage greater than 3 volts?

-> Yes

REPAIR the short to B+ voltage. For additional information, refer to the wiring diagrams. CLEAR the

DTCs. TEST the system for normal operation.

-> No

GO to Pinpoint Test G290076t7.

G290076t7 : CHECK THE IGNITION COIL (CYLS 1, 4, 6, AND 7) MONITOR
CIRCUITS FOR SHORT TO GROUND

1. Disconnect the relevant ignition coil electrical connector(s), (PI02 to PI09). 2. Measure the

resistance between:

Cyl 1 PI02, pin 02 (GB) and GROUND.

Cyl 4 PI07, pin 02 (GB) and GROUND.

Cyl 6 PI08, pin 02 (GB) and GROUND.

Cyl 7 PI05, pin 02 (GB) and GROUND.

Is the resistance less than 10,000 ohms?

-> Yes

REPAIR the short to GROUND. For additional information, refer to the wiring diagrams. CLEAR the

DTCs. TEST the system for normal operation.

-> No

GO to Pinpoint Test G290076t8.

G290076t8 : CHECK THE IGNITION COIL (CYLS 2, 3, 5, AND 8) MONITOR
CIRCUITS FOR HIGH RESISTANCE

1. Disconnect the relevant ignition coil electrical connector(s), (PI02 to PI09). 2. Measure the

resistance between:

Cyl 2 PI06, pin 02 (YB) and PI01, pin 132 (YB).

Cyl 3 PI03, pin 02 (YB) and PI01, pin 132 (YB).

Cyl 5 PI04, pin 02 (YB) and PI01, pin 132 (YB).

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Cyl 8 PI09, pin 02 (YB) and PI01, pin 132 (YB).

Is the resistance greater than 5 ohms?

-> Yes

REPAIR the high resistance circuit. This circuit includes the harness splice, PIS10. For additional

information, refer to the wiring diagrams. CLEAR the DTCs. TEST the system for normal operation.

-> No

GO to Pinpoint Test G290076t9.

G290076t9 : CHECK THE IGNITION COIL (CYLS 2, 3, 5, AND 8) MONITOR
CIRCUITS FOR SHORT TO B+ VOLTAGE

1. Reconnect the battery negative terminal. 2. Disconnect the relevant ignition coil electrical

connector(s), (PI02 to PI09). 3. Measure the voltage between:

Cyl 2 PI06, pin 02 (YB) and GROUND.

Cyl 3 PI03, pin 02 (YB) and GROUND.

Cyl 5 PI04, pin 02 (YB) and GROUND.

Cyl 8 PI09, pin 02 (YB) and GROUND.

Is the voltage greater than 3 volts?

-> Yes

REPAIR the short to B+ voltage. For additional information, refer to the wiring diagrams. CLEAR the

DTCs. TEST the system for normal operation.

-> No

GO to Pinpoint Test G290076t10.

G290076t10 : CHECK THE IGNITION COIL (CYLS 2, 3, 5, AND 8) MONITOR
CIRCUITS FOR SHORT TO GROUND

1. Disconnect the relevant ignition coil electrical connector(s), (PI02 to PI09). 2. Measure the

resistance between:

Cyl 2 PI06, pin 02 (YB) and GROUND.

Cyl 3 PI03, pin 02 (YB) and GROUND.

Cyl 5 PI04, pin 02 (YB) and GROUND.

Cyl 8 PI09, pin 02 (YB) and GROUND.

Is the resistance less than 10,000 ohms?

-> Yes

REPAIR the short to GROUND. For additional information, refer to the wiring diagrams. CLEAR the

DTCs. TEST the system for normal operation.

-> No

Contact dealer technical support for advice on possible ECM failure.

PINPOINT TEST G290076p2 : CHECK
SPARK PLUG RESISTANCE

G290076t11 : CHECK SPARK PLUG RESISTANCE

1. Remove the suspect spark plug(s). 2. Measure the resistance between the spark plug center

electrode tip and the spark plug HT contact.

Is the resistance between 8,000 and 12,000 ohms? (nominal 10,000 ohms)

-> Yes

Check ignition coil and circuits. See possible sources list for misfire.

-> No

INSTALL a new spark plug. CLEAR the DTC. TEST the system for normal operation.

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