Warning and indicator lamps

Warning and indicator lamps

The INFO DISPL lamp comes on when a message is displayed on the SID. The lamp is supplied with +15 current from the main instrument unit and grounded by the MIU's control module. The SID constantly transmits the bus information INFO DISPL, unit ON/OFF.

On receiving INFO DISPL ON, the control module grounds the output for the lamp which then lights up.

The main instrument unit lights this lamp for 3 seconds when the ignition is switched on.

Diagnostics

The function has no diagnostics.

Central warning lamp

The central warning lamp lights up when a fault occurs in a system having to do with the car's safety.

The lamp is supplied with +15 current from the main instrument unit and grounded by the MIU's control module when one of the following warning or indicator lamps lights up:

•	AIRBAG lamp

•	Oil pressure lamp

•	Charging lamp

•	Brake fluid warning lamp

•	Handbrake lamp

•	ABS warning lamp

The handbrake lamp lights the central warning lamp if the speed passes 5 km/h from a speed below 5 km/h.

All these lamps are supplied with current (+15 circuit) in the main instrument unit and grounded in their respective systems.

The central warning lamp also lights up when:

•	The coolant temperature exceeds 129°C

At the same time as the central warning lamp lights up, the main instrument unit send bus information to the SID to activate an acoustic signal. This does not happen when the starting the engine since the lamps are then only tested; the engine speed must be greater than 300 rpm for this request.

Diagnostics

The function has no diagnostics.

Oil pressure warning lamp

The oil pressure warning lamp is situated in the top right-hand corner of the instrument display. This lamp warns the driver when engine oil pressure is too low.

The lamp is supplied with current in the main instrument unit and grounded via terminal 2 (K20) of the oil pressure sensor.

If the oil pressure falls below 0.3-0.5 bar, the oil pressure sensor closes, the circuit is grounded and the lamp lights up. At the same time, the central warning lamp comes on and, at engine speeds exceeding 300 rpm, the MIU sends a request to the SID to activate an acoustic signal.

Diagnostics

The function has no diagnostics.

Charge warning lamp

The charge warning lamp is situated in the top right-hand corner and informs the driver whether or not the generator is charging.

The lamp is supplied with current in the main instrument unit and grounded by the generator via terminal 3 (K20).

If the generator is not rotating or for some reason does not charge, the warning lamp circuit is grounded via the regulator through the generator's field winding, causing the lamp to light up. At the same time the central warning lamp lights up and, at engine speeds above 300 rpm, the MIU sends a request to the SID for activation of an acoustic signal.

When the generator is charging, its D+ and B+ terminals will have the same voltage. Both terminals of the warning lamp will then be supplied with this same voltage and the lamp goes out.

Connected in parallel with the lamp is a resistor which ensures that the generator receives its magnetizing current when starting, even if the lamp bulb is faulty.

A diode is connected in series with the resistor and the lamp. This diode prevents the lamp from lighting up when high charging currents are generated.

Diagnostics

The function has no diagnostics.

Warning lamp, AIRBAG

The airbag warning lamp is situated on the right-hand side of the main instrument unit. The lamp warns the driver in the event of a fault in the airbag system. A second lamp consists of the central warning lamp, which goes out only when all the warning inputs are normal.

The airbag lamp is supplied with +15 current in the main instrument unit and grounded by the airbag control module via pin 1 (K20) of the main instrument unit.

If a fault should occur in the system, the airbag lamp and central warning lamp will light up continuously and, at engine speeds above 300 rpm, the MIU will send a request to the SID for activation of an acoustic signal.

If the airbag system has been activated - sent firing current to the explosive charges in the gas generators - the airbag and central warning lamps will light up continuously.

The airbag control module lights the lamp when the ignition is turned on. If there are no faults, the lamp will go out after 3 seconds.

Diagnostics

An open circuit/short circuit sets a diagnostic trouble code in the AIRBAG control module.

Warning lamp, brake fluid level

The brake fluid warning lamp warns the driver if the level of fluid in the reservoir is too low. The lamp will also go on if there is a fault in the ABS system.

The lamp is supplied with current in the main instrument unit and grounded via terminal 12 (K20) of the brake fluid reservoir.

If the level is too low, the central warning lamp also lights and, at engine speeds exceeding 300 rpm, the MIU send a request to the SID to activate an acoustic signal.

The main instrument unit lights the brake fluid level warning lamp for 3 seconds when the ignition is turned on.

Diagnostics

The function has no diagnostics.

Warning lamp, handbrake

The handbrake warning lamp is situated on the right-hand side of the main instrument unit and informs the driver if the handbrake is applied.

The lamp is supplied with current in the main instrument unit. As long as the handbrake remains applied, the switch operated by the handbrake lever grounds the lamp via terminal 11 (K20), causing it to light up.

If vehicle speed exceeds 5 km/h from a speed less than 5 km/h while the handbrake is applied, the central warning lamp also lights and the MIU sends a request to the SID to activate an acoustic signal.

Diagnostics

The function has no diagnostics.

Indicator lamp, TCS

The TCS indicator lamp is located on the left-hand side of the main instrument unit (in the tachometer). The lamp comes on when TCS modulation is active.

The indicator lamp is turned on when the TC/ABS control module sends information on the P-bus.

The lamp comes on after a brief delay (300 ms) when TCS modulation is active and stays on as long as the system is operational but at least for one second. The lamp is turned on for 3-5 seconds when the ignition is switched on.

Diagnostics

The function has no diagnostics.

Indicator lamp, TCS OFF

If a fault occurs in the TC/ABS system, the TCS OFF lamp will turned on via the P-bus. The warning lamp also comes on if the system is disengaged manually, which can be done at speeds below 60 km/h (37.5 mph) by pressing in the TCS button. The system can be engaged at any speed by pressing the TCS button, whereby the TCS OFF lamp will be turned off again.

The lamp will come on for 3-5 seconds when the ignition is switched on and then go out if no faults are detected.

Diagnostics

A system error affecting the ABS function will turn on the warning lamps for ABS and brakes and the central warning lamp.

If the bus message from TC/ABS is absent for 2 seconds, the TCS OFF and ABS lamps will be turned on. If the bus message remains absent for another 8 seconds, the central warning lamp and the brake warning lamp will be turned on as well.

ABS warning lamp

The ABS or TC/ABS control module monitors the operation of the ABS system and turns on the ABS warning lamp on the right-hand side of the main instrument unit if a fault occurs.

When the ABS lamp lights up, the anti-lock braking system is disabled and the brakes work just like a conventional braking system.

In cars with ABS (not connected to a bus) , the lamp is powered by the main instrument unit and grounded via pin 10 of the main instrument unit (K20) by the TC/ABS control module.



In cars with TC/ABS (connected to the P-bus) the main instrument unit receives information over the bus to turn the lamp on/off.

The TC/ABS control module turns on the lamp when the ignition is turned on. It will go out within 3 seconds if there are no faults.

When the ABS warning lamp goes on, the central warning lamp will also go on.

Diagnostics

The function has no diagnostics.

SPORT indicator lamp

On cars equipped with automatic transmission, the indicator lamp lights up when the SPORT button on the selector lever is pressed. The sport function can be activated when the selector lever is in position D, 3, 2 or 1.

In SPORT mode, the transmission remains longer in each gear.

The lamp is supplied with current in the main instrument unit and grounded by the main instrument unit control module. The TCM continuously sends bus information SPORT, unit ON/OFF.

On receiving SPORT ON, the control module grounds the output of the lamp which then lights up.

The indicator lamp goes out under the following conditions:

•	The sport button is depressed again.

•	The transmission is in Limp-home mode.

•	Winter mode is selected.

•	The ignition is turned off and on again.

•	The selector lever is moved to P or R.

Diagnostics

The function has no diagnostics.

WINTER indicator lamp

To make starting easier on slippery road surfaces, the TCM transmission is equipped with a winter mode, i.e. the car starts in 3rd gear when the winter button (W) on the selector lever is pressed.

The lamp is supplied with current in the main instrument unit and grounded by the main instrument unit control module. TCM continuously sends bus information WINTER ON, unit ON/OFF.

On receiving WINTER ON, the control module grounds the output of the lamp which then lights up.

The indicator lamp goes out under the following conditions:

•	The winter button is pressed again.

•	The transmission is in Limp-home mode.

•	The ignition is turned off and on again.

•	The transmission fluid temperature is above 140°C.

Diagnostics

The function has no diagnostics.

CHECK GEARBOX indicator lamp

If there is a fault in the automatic transmission or its control module, the TCM lights the CHECK GEARBOX warning lamp in the main instrument unit.

The lamp is supplied with current in the main instrument unit and grounded by the MIU's control module. The TCM continuously sends bus information CHECK GEARBOX, unit ON/OFF.

On receiving CHECK GEARBOX ON, the control module grounds the output of the lamp which then lights up.

When the TCM sends the message CHECK GEARBOX OFF, the lamp goes out.

When the ignition is turned on, TCM lights the lamp for approx. 3 seconds and if there is no fault the lamp will go out.

Diagnostics

The function has its own diagnostics in the sending system.

Fuel reserve indicator lamp

With about 10 litres of fuel remaining in the tank, the lamp lights up to indicate low fuel level. The lamp is supplied with current from the main instrument unit and grounded by the main instrument unit's control module when it is to be lit.

The main instrument unit lights this lamp for three seconds when the ignition is switched on.

Diagnostics

An open circuit/short circuit sets diagnostic trouble code B1720. The gauge needle indicates 0 litres and the fuel reserve indicator lamp lights up.

CHECK ENGINE indicator lamp

The CHECK ENGINE lamp (MIL) warns the driver when a fault occurs in the engine management system.

The lamp is supplied with current in the main instrument unit and grounded by the MIU's control module. Trionic continuously sends bus information CHECK ENGINE, unit ON/OFF.

On receiving CHECK ENGINE ON, the control module grounds the output of the lamp which then lights up.

In certain markets, the TCM (transmission control module) lights the CHECK ENGINE lamp.

If Trionic changes the status of the message to CHECK ENGINE OFF, the lamp goes out.

When the ignition is ON, the lamp is lit until the engine starts. If there are no faults, Trionic sends bus information CHECK ENGINE OFF and the lamp goes out.

Diagnostics

The function has its own diagnostics in the sending system.

Direction indicator repeater lamps RH and LH

The repeater lamps are situated in the upper part of the main instrument unit and show when the direction indicators are on.

The lamps are supplied with current in the main instrument unit and grounded by the MIU's control module. DICE continuously sends bus information on the status of DIRECTION INDICATORS RIGHT and DIRECTION INDICATORS LEFT, unit ON/OFF.

On receiving DIRECTION INDICATORS ON, the control module grounds the output of the lamp in question which then lights up.

Example

If the LH direction indicators are activated, DICE will change the status of the information DIRECTION INDICATORS LEFT ON/OFF at the same time as the direction indicator lamps are lit. In this way, the main instrument unit control module can synchronize the flashing of the repeater lamps with the direction indicator lamps.

The SID also activates the TIC-TAC sound at the same time as the lamps flash.

The function is the same for the RH direction indicators.

Hazard flashers

The function for the hazard flashers is the same as for the direction indicators LH/RH except that both lamps are activated at the same time.

When the hazard flashers are activated and the ignition is OFF, the indicator lamps will not flash.

Diagnostics

The function has no diagnostics.

CRUISE indicator lamp

The main instrument unit incorporates a CRUISE indicator lamp that lights up when Cruise Control is engaged.

The lamp is supplied with current in the main instrument unit and grounded by the MIU's control module. Trionic continuously sends bus information CRUISE Lamp, unit ON/OFF.

On receiving CRUISE Lamp ON, the control module grounds the output of the lamp which then lights up.

If Cruise Control is disengaged, Trionic changes the status of the information to CRUISE Lamp OFF and the lamp goes out.

Diagnostics

The function has its own diagnostics in the sending system.

SHIFT-UP indicator lamp

To achieve low fuel consumption, the SHIFT-UP indicator lamp on the main instrument unit lights up when a higher gear should be engaged.

The lamp is supplied with current in the main instrument unit and grounded by the MIU's control module. Trionic continuously sends bus information SHIFT-UP, unit ON/OFF.

On receiving SHIFT-UP ON, the control module grounds the output of the lamp which then lights up.

After a higher gear has been selected, Trionic changes the status of the information to SHIFT-UP OFF and the lamp goes out.

Diagnostics

The function has its own diagnostics in the sending system.

Lights-on indicator lamp

An indicator lamp shows when the headlamps are switched on. The lamp is situated under the speedometer.

The indicator lamp is supplied with current from the lights switch on pin 9 (K20) of the main instrument unit and is grounded in the main instrument unit.

Diagnostics

The function has no diagnostics.

Indicator lamp, rear fog light

The indicator lamp for the rear fog light is situated in the upper right-hand corner and informs the driver when the rear fog light is switched on.

The lamp is supplied with current in the main instrument unit and grounded by the MIU's control module. DICE continuously sends bus information REAR FOG LIGHT, unit ON/OFF.

On receiving REAR FOG LIGHT ON, the control module grounds the output of the lamp which then lights up.

If DICE changes the status of the bus information to REAR FOG LIGHT OFF, the lamp goes out.

Diagnostics

The function has its own diagnostics in the sending system.

Main beam indicator lamp

The indicator lamp is situated in the upper left-hand corner and informs the driver that main beams are switched on.

The lamp is supplied with current from main beam fuse 10 on pin 15 (K20) of the main instrument unit and is grounded in the main instrument unit.

Diagnostics

The function has no diagnostics.

Selector lever position indicator

On cars with automatic transmission, the Selector lever position indicator shows which gear is selected by lighting up the corresponding gear symbol.

The selector lever position indicator consists of 7 segments, each with an LED beside the corresponding symbol (PRND321). The symbols are illuminated by a lamp, the brightness of which is controlled by the rheostat value.

The lamp and LEDs are supplied with current in the main instrument unit and are grounded by the main instrument unit control module. The TCM continuously sends bus information on the status of all the selector lever positions, unit ON/OFF.

Example

When the selector lever is in position P, the following information is sent:

Selector lever position	P	ON
Selector lever position	R	OFF
Selector lever position	N	OFF
Selector lever position	D	OFF
Selector lever position	3	OFF
Selector lever position	2	OFF
Selector lever position	1	OFF

The main instrument unit control module grounds the output of the LED for symbol P, which then lights up. The other symbols remain off. If another selector lever position is engaged, the status of the bus information will change. The previously lit symbol will go out and the symbol for the new selector lever position will light up.

Diagnostics

The function has its own diagnostics in the sending system.

Door indication

Door indication (on the pictogram) informs the driver if any of the doors or the tailgate is open. It consists of five red LEDs and a lamp. The doors and the tailgate each have an LED. The car is indicated in orange by a lamp.

The LEDs and the lamp are supplied with current in the main instrument unit and grounded by the main instrument unit control module.

TWICE continuously sends bus information on the status of the doors and tailgate, unit OPEN/CLOSED.



Example

When the driver's door is open and the other doors and tailgate are closed, the following information is sent:

Driver's door		Open
Passenger's door		Closed
Rear door LH		Closed
Rear door RH		Closed
Tailgate		Closed

The main instrument unit control module grounds the outputs of the symbols for the driver's door and the car, which then light up. The other LEDs remain off. The car symbol always lights up if a door or the tailgate is open.

Diagnostics

The function has no diagnostics.