Pinpoint Test AB: PACM POWER SUPPLY OR GROUND FAULT

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2006 Jaguar XKR, 2006 Jaguar XK8, 2005 Jaguar XKR, 2005 Jaguar XK8, and 2004 Jaguar XKR. However, it is still accessible from the selected car via links, so may be relevant.

CHECK THE ACCESSORY SWITCHED SUPPLY TO THE PACM
Disconnect the PACM electrical connector, BT04.

Turn the ignition switch to the ACC position.

Measure the voltage between BT04, pin 01 (WG) and GROUND.

Is the voltage less than 10 volts?

YES: REPAIR the circuit between the PACM and battery. This circuit includes the rear power distribution box, (fuse 13) the accessory relay, and the high power protection module. For additional information, refer to the wiring diagrams. Test the system for normal operation.

NO: Go to step 2.
CHECK THE PERMANENT GROUND TO THE PACM
Measure the resistance between BT04, pin 16 (B) and GROUND.

Is the resistance greater than 5 ohms?

YES: REPAIR the high resistance circuit. For additional information, refer to the wiring diagrams. Test the system for normal operation.

NO: Check for DTCs indicating a faulty circuit. Contact dealer technical support for advice on possible PACM failure