Johnson Controls Interiors ZH29HL3P Users Manual

GENERAL

This system provides the vehicle owner with compass, temperature, trip computer

information, tire pressure information(PSI), and integrated Homelink. The Homelink and
tire pressure portions of the circuit are separate from the compass section, except that the
compass microprocessor controls the power to the Homelink section and the tire
pressure section. The compass microprocessor also serially communicates to the
Homelink/PSI microprocessor which switch has been pressed and the Homelink/PSI
microprocessor communicates back the tire pressure information to the compass
microprocessor for display to the driver. The following information refers to the
Homelink part of the system and also to the PSI part of the system.

Homelink Operational Description

This system gives the vehicle owner the ability to use a garage door opener (GDO) that is
integral to the interior trim of the vehicle. The Homelink shall be capable of learning and
remembering variables required to emulate three different GDO transmitters. In the learn
mode of operation, the user selects one of three channels. The Homelink determines
the frequency, data and, where applicable, the Rolling Code manufacturer of the original
GDO transmitter (OT). The frequency and data stream or rolling algorithm parameters
(created within the OT's Rolling Code guidelines) are then stored in non-volatile memory
(NVM) for use in the transmit mode of operation. Once contained in memory, the
Homelink shall activate the given receiver by repeating, at the proper frequency, either a
fixed data stream or a hopping data stream created with the OT's Rolling Code algorithm.

Homelink Transmit Mode of Operation

If a selected channel has been previously trained, the HomeLink shall operate in
transmit mode. To operate the Homelink in the transmit mode, the user shall activate
one of three transmit buttons. The Compass microprocessor shall determine which button
has been activated and send the information serially to the Homelink microprocessor,
which shall generate appropriate data at the proper frequency.

The VFD indicator shall be ON continually during transmit mode.

The VFD indicator shall rapidly blink (4Hz ± 10%) for 2 ± 10% seconds followed by
continuous illumination during Rolling Code PWM transmissions.

The HomeLink will continue in the transmit mode for twenty (20 ± 10%) seconds before
proceeding to the learning mode of operation.

Homelink Default Mode of Operation

If a selected channel has never been previously trained nor previously erased, the
Homelink shall operate in default mode. To operate the Homelink in the default mode,
the user shall activate one of three transmit buttons. The HomeLink shall determine
which button has been activated, and using a pre-determined identification code and
frequency (see Appendix B for details) shall transmit such data with the VFD indicator
continually on. The HomeLink will continue in the default mode for twenty (20 ± 10%)
seconds before proceeding to the learning mode of operation.

Homelink Rolling Code Default Mode of Operation
The user places the Homelink in rolling code default mode by simultaneously holding
down buttons one, two, and three for 30 ± 10% seconds.

If buttons one, two and three are released while the VFD is rapidly blinking (< 10 seconds),
all three channels will be cleared of data. When one of these channels is subsequently
activated, the device shall immediately enter the learn mode of operation.

To operate the Homelink unit in the rolling code default mode, the user shall activate one
of the three transmit buttons. The Homelink unit shall determine which button has been
activated and using a pre-determined code-hopping algorithm, bit period and frequency
(see Appendix B for details) shall transmit such data with the VFD indicator rapidly blinking
(4Hz ± 10%) for 2 ± 10% seconds followed by continuous illumination.

Homelink Learn Mode of Operation

The Homelink system can learn up to three (3) separate garage door opener (GDO)
systems. To train a GDO transmitter to the Homelink system, the user shall complete
the following steps:

* select one of three channels by selecting 1 of three transmit buttons. If more
than one channel is selected at one time, the Homelink shall give the lowest
numbered channel highest priority. For example if channel 2 and 3 are
selected, channel 2 shall have the higher priority.
* hold a transmit button for twenty (20 ± 10%) seconds at which time the learn
mode shall be indicated. The Homelink shall be in learn mode only if the VFD
indicator is blinking at a rate of lHz ±10%. (The Homelink shall immediately
enter learn mode if the selected channel is determined to be clear of data. See

1.2.4)
* hold the present GDO transmitter near the Homelink. The Homelink shall
train when the OT is held within 1 inch, and shall not train if the OT is held more
than 3 feet away from the unit. Once in learn mode, the training process will be
complete in <= 90 seconds and shall be indicated by rapidly blinking the VFD (4Hz
± l0%) 40 times. After completion the VFD indicator shall be off.
* the data containing the frequency of operation and security code information
shall be stored in non-volatile memory (NVM).

Homelink Clear Mode of Operation

The NVM of the Homelink can be completely erased by simultaneously holding down
buttons one and three for 20 ± 10% seconds. Successful erasure of the memory shall be
indicated by rapidly blinking the VFD indicator (4Hz ± 10%) 40 times.

* If buttons one and three are released while the VFD indicator is blinking rapidly
(< 10 seconds), all three channels shall be cleared of data. When one of these
channels is subsequently activated, the device shall immediately enter learn
mode of operation.

* If buttons one and three are continually activated for more than 1 0 seconds at;:
the rapid blinking starts, the VFD indicator shall be off. When one of these
channels is subsequently activated, the device shall immediately enter default
mode of operation.

* If buttons one, two, and three are continually activated for more than 10
seconds after the rapid blinking starts, the VFD indicator shall be off. When one
of these channels is subsequently activated, the device shall immediately enter
rolling code default mode of operation.