COMBINATION METER

The combination meter features large, clearly visible analogue indicators. Designed to be easy-to-distinguish by drivers, the gauges are arranged with the speedometer in the middle, the coolant temperature gauge at upper right, the fuel gauge at lower right and the tachometer at left. The combination meter offers the following advantages.

The high contrast meter using LED as a lighting source is standard equipped.
The formed meter panel made of acryl with a plated ring creates cubic appearance effect.
With the ignition switch turned ON, the needles of speedometer and others, the ring area, and the panel surface illuminates staggeredly in 3 steps to create a luxury atmosphere.
The rheostat integrated in the combination meter controls brightness of illumination in 4 steps for both daytime (non-dimming) and nighttime (dimming) modes.
CAN communication is used for more reliable transmission of all gauge data and indicator lamp input signals, such as vehicle speed, engine speed, and coolant temperature.

note For further details on CAN, refer to GROUP 54C, CAN .

note The signals that the combination meter uses are described in the CAN communications input signals table.
Several diagnosis functions such as the diagnosis code memory and actuator tests are prepared in order to improve serviceability.
For a brighter display at night and for a longer useful life, all indicator lamps, warning lamps, and illumination bulbs use LEDs.
The indicators for the speedometer, fuel gauge, and other gauges are driven by a stepping motor.
The electric speedometer is adopted so that it is operated by vehicle speed signals sent from engine-ECU <M/T> or engine-A/T ECU <A/T> via CAN communication.
A large and clear LCD type odo-tripmeter is provided. The odometer continuously displays values while the tripmeter adopts a twin-trip (trip A, trip B) function which is switched by a reset button. Even with the ignition switch turned OFF, the odo-tripmeter is displayed by operating the reset button.
Comes with a tail indicator lamp to let the driver know that the tail lamp is on.
Comes with fog indicator lamps to let the driver know that the front and rear fog lamps are on.
Comes with a seat belt warning lamp to encourage the driver to fasten the seat belt.
The shift position indicator digitally shows gear positions from 1st to 4th on the left of A/T indicator lamp for easy confirmation of gear positions. <A/T>

CONSTRUCTION DIAGRAM

STEPPING MOTOR

These gauges use a stepping motor as the drive mechanism for the indicators (called the "movement"). Compared with conventional movements, the torque for driving the indicators is much greater for superior indicator accuracy and more stable response. The indicator position displayed is determined as the microcontroller circuit in the gauge controls the stepping motor. In conventional gauges, the indicator revolves 360° in response to 360° driving controls. However, a stepping motor is designed so that the indicator revolves only 15 °, even in response to a drive control of 360°. The 15 ° drive control must be repeated to make the indicator rotate 360°. Thus, at a position 15 ° away from the indicator display position, there will be an identical control.
As a result, in the case of a great impact such as from an accident when the indicator becomes misaligned, if the ignition is switched on to start driving while the indicator is misaligned, the indicator will function while misaligned. Thus, to return the indicator to the normal position in case this happens, when the ignition is switched on, or when the battery line is reconnected, the indicator positions are reset to their respective positions. After the battery line is cut and reconnected, the indicators simply return to the zero position. The same operation is performed after voltage is restored if gauge functions are lost because of a voltage drop from cranking or the like. Furthermore, the indicator only returns 15 ° after the ignition is switched on or the lock is turned off. The indicator is not moved if it is not misaligned.

CAN COMMUNICATION INPUT SIGNALS TABLE

Signal	Transmitter ECU
Engine speed signal	Engine-ECU <M/T> or Engine-A/T ECU <A/T>
Vehicle speed signal
Vehicle stop signal
Malfunction indicator lamp request signal
Glow indicator lamp signal
Auto-cruise control indicator lamp signal
Engine coolant temperature signal
Selector position signal <A/T>
ABS warning lamp request signal	ABS-ECU or TCL/ASC-ECU
Indicator request signal	ABS-ECU or TCL/ASC-ECU
SRS warning lamp illumination request signal	SRS-ECU
Communication standby signal	ETACS-ECU
Ignition switch (ACC) signal
Ignition switch (IG1) signal
High-beam indicator request signal
Turn-signal indicator request signal
Front fog lamp indicator request signal
Rear fog lamp indicator request signal
Illumination signal
Door "open" signals
Interior lamp shut-off signal

DIAGNOSIS CODE TABLE

Code No.	Diagnostic item
B1200	Malfunction odometer
B1201	Trouble of fuel information
U1073	Bus Off
U1100	Engine-ECU <M/T> or Engine-A/T ECU <A/T> time-out (related to engine)
U1101	Engine-A/T ECU <A/T> time-out (related to transmission)
U1102	ABS-ECU or TCL/ASC-ECU time-out
U1109	ETACS-ECU time-out
U1112	SRS-ECU time-out
U1120	Failure information on power train control module (related to engine)
U1206	Flag invalid

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