Description & Operation: Notes

WARNING: Vehicles are equipped with air bag supplemental restraint system. Before attempting any repairs involving steering column, instrument panel or related components, see SERVICE PRECAUTIONS and DISABLING & ACTIVATING AIR BAG SYSTEM in appropriate AIR BAG RESTRAINT SYSTEMS article.

CAUTION: When battery is disconnected, vehicle computer and memory systems may lose memory data. Driveability problems may exist until computer systems have completed a relearn cycle. See COMPUTER RELEARN PROCEDURES article in GENERAL INFORMATION before disconnecting battery.

CAUTION: Whenever battery power to the radio is lost, the anti-theft code must be entered and the preset stations must be reprogrammed. See SECURITY CODE under PROGRAMMING.

Battery voltage is provided to the radio at all times through the P wire. In addition to the anti-theft feature, this input voltage keeps the preset station memory alive. Whenever battery power to the unit is lost, the anti-theft code must be entered and the preset stations must be reprogrammed. See SECURITY CODE under PROGRAMMING.

When the radio (Z111) and the ignition are turned on, the voltage signal through the WK wire to the control head 'wakes up' the unit. The radio (Z111) plays, the LCD display comes on and the control buttons illuminate. On some models, when the parklamps or headlamps are turned on, a voltage signal is sent through the RW wire to dim the LCD display and control buttons for night driving.

Radio (Z111) signals are received via a coaxial cable from the side screens and antenna amplifiers. The amplifiers filter and boost the signal from the side screen, using power supplied on WO wires, whenever the ignition switch (X274) is in position I or II.

The CD changer (Z114) is permanently supplied with power through the P wire via the radio and a DIN cable. For the Range Rover, three levels of factory-fitted in-car entertainment systems are available. The mid/low line radio has the following features: Electronically tuned AM/FM cassette radio (Z111), right antenna amplifier (Z178) for AM/FM signals, and 6, 8 or 10 speakers.

The high line (North America and Japan) radio has the following features: Electronically tuned AM/FM cassette radio (Z111), right antenna amplifier (Z178) for AM/FM signals only, left antenna amplifier (Z177) for FM signals only, a subwoofer amplifier (Z176), a CD changer (Z114), a Digital Signal Processor (DSP) amplifier (Z293), and 10 speakers plus a subwoofer speaker (K146).