Warning and indicator lamps

Warning and indicator lamps

The INFO DISPL lamp lights up 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 continuously sends 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.

Diagnosis

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 +15 current from the main instrument unit and grounded to their respective components/systems.

The central warning lamp also lights up when:

•	The coolant temperature exceeds 119°C

At the same time as the central warning lamp lights up, the main instrument unit sends bus information to the SID requesting it to sound a signal. This does not occur when the ignition is switched on as the lamps are then only tested. An engine speed of above 300 rpm is required for this request.

Diagnosis

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 is below 0.3-0.5 bar, the oil pressure sensor contacts close, the circuit is grounded and the lamp lights 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.

Diagnosis

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 does not rotate or charge for any reason, the indicator 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 charge voltages are generated.

Diagnosis

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.

Diagnosis

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 tells the driver when the level of the fluid in the reservoir is too low. The lamp also goes 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 up and, at engine speeds above 300 rpm, the MIU sends a request to the SID for activation of an acoustic signal.

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

Diagnosis

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 the vehicle speed passes 5 km/h from a speed below 5 km/h while the handbrake is applied, the central warning lamp will also light up and the MIU will send a request to the SID for activation of an acoustic signal.

Diagnosis

The function has no diagnostics.

ABS warning lamp

The ABS control module monitors the function of the ABS system and in the event of a fault lights the ABS warning lamp, which is situated on the right-hand side of the main instrument unit.

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

The lamp is supplied with current in the main instrument unit and grounded via main instrument unit terminal 10 (K20) in the ABS control module.

The ABS control module lights the lamp when the ignition is switched on and if there is no fault it will go out after approx. 3 seconds.

The brake fluid warning lamp and the central warning lamp will go on at the same time as the ABS warning lamp.

Diagnosis

The function has no diagnostics.

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 3 seconds when the ignition is switched on.

Diagnosis

The function has no diagnostics.

Glow indicator lamp

The glow indicator lamp goes on during pre-heating.

The lamp is supplied with current in the main instrument unit and is grounded by the main instrument unit control module. EDC 15 sends continuous information to the bus on the pre-heating, unit ON/OFF.

When pre-heating is ON, the control module grounds the lamp output so that it goes on.

Diagnosis

The function has its diagnostics in the sending system.

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. EDC 15 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.

When the ignition is ON, EDC 15 keeps the lamp alight. If there are no faults, EDC 15 sends bus information CHECK ENGINE OFF and the lamp goes out after 1.5 seconds.

Diagnosis

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 TICK-TACK 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 repeater lamps will not flash.

Diagnosis

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. EDC 15 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, EDC 15 changes the status of the information to CRUISE Lamp OFF and the lamp goes out.

Diagnosis

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 light switch on pin 9 (K20) of the main instrument unit and is grounded in the main instrument unit.

Diagnosis

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.

Diagnosis

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 8 on pin 15 (K20) of the main instrument unit and is grounded in the main instrument unit.

Diagnosis

The function has no diagnostics.

Door indication

Door indication informs the driver if any of the doors or the boot lid is open. It consists of five red LEDs and a lamp. The doors and the boot lid 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 boot lid, unit OPEN/CLOSED.



Example

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

Driver's door		Open
Passenger door		Closed
Rear door LH		Closed
Rear door RH		Closed
Boot lid		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 boot lid is open.

Diagnosis

The function has no diagnostics.