Pinpoint Test AG: ONE OR MORE D2B MODULES NOT RESPONDING. ACCESSORY SWITCHED SUPPLY FAULT

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2008 Jaguar S-Type, 2007 Jaguar S-Type, 2006 Jaguar S-Type, 2005 Jaguar S-Type, and 2004 Jaguar S-Type. However, it is still accessible from the selected car via links, so may be relevant.

CHECK THE ACCESSORY SWITCHED SUPPLY TO THE VOICE ACTIVATED CONTROL MODULE
Disconnect the voice activated control module electrical connector, CA300.

Turn the ignition switch to the ACC position.

Measure the voltage between CA300, pin 8 (WR) and ground.

Is the voltage greater than 10 volts?

YES: Go to step 1.

NO: Repair the circuit between the voice activated control module electrical connector, CA300, pin 8 and the ignition switch. CLEAR the DTC. TEST the system for normal operation. This circuit includes the power distribution box, fuse 27.
CHECK THE ACCESSORY SWITCHED SUPPLY TO THE 'PHONE MODULE
Disconnect the 'phone module electrical connector, CA261.

Turn the ignition switch to the ACC position.

Measure the voltage between CA261, pin 014 (WG) and ground.

Is the voltage greater than 10 volts?

YES: Go to step 2.

NO: Repair the circuit between the 'phone module electrical connector, CA261, pin 014 and the ignition switch. CLEAR the DTC. TEST the system for normal operation. This circuit includes the power distribution box, fuse 27.
CHECK THE ACCESSORY SWITCHED SUPPLY TO THE NAVIGATION COMPUTER
Disconnect the navigation computer electrical connector.

Turn the ignition switch to the ACC position.

Measure the voltage between CA258, pin 11 (WU) and ground.

Is the voltage greater than 10 volts?

YES: Check the module for ground. INSTALL a new navigation computer. Refer to Navigation System . CLEAR the DTC. TEST the system for normal operation.

NO: Repair the circuit between the navigation computer electrical connector, CA258, pin 11 and the ignition switch. CLEAR the DTC. TEST the system for normal operation. This circuit includes the power distribution box, fuse 27.
CHECK THE ACCESSORY SWITCHED SUPPLY TO THE AMP
Disconnect the amp electrical connector.

Turn the ignition switch to the ACC position.

Measure the voltage between CA263, pin 001 (WR) and ground.

Is the voltage greater than 10 volts?

YES: Check the module for ground. INSTALL a new amp. Refer to Audio Unit . CLEAR the DTC. TEST the system for normal operation.

NO: Repair the circuit between the amp electrical connector, CA263, pin 001 (WR) and the ignition switch. CLEAR the DTC. TEST the system for normal operation. This circuit includes the power distribution box, fuse 27.