Indicator and warning lamps (MIU 2)

Indicator and warning lamps (MIU 2)

INFO DISPL indicator lamp

The INFO DISPL lamp is connected to a +15 supply in the main instrument display panel and grounded in the main instrument display panel's control module when a signal is received from the SID unit on pins 3 and 4 requesting it to switch on the INFO DISPL lamp.

The main instrument display panel tests this lamp for 3 seconds when the ignition is switched on.

Central warning lamp

The central warning lamp is connected to a +15 supply in the main instrument display panel and grounded in the main instrument display panel's control module when the following indicator and warning lamps light up:

•	ABS (ANTI LOCK)

•	Oil pressure lamp

•	Brake fluid All these lamps are connected to a +15 supply in the main instrument display panel and grounded in their respective systems. Other lamps:

•	The handbrake warning lamp switches on the central warning lamp if speed exceeds 5 km/h with the handbrake applied.

•

SRS 2 (airbag) does not have its own lamp. It switches on the central warning lamp. At the same time as the central warning lamp lights up the main instrument display panel sends a signal to the SID unit requesting it to sound an acoustic signal. This does not happen when the ignition is switched on, as the lamps are then only tested.

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 the engine oil pressure is too low.

The lamp is supplied with power in the main instrument display panel.

If the oil pressure drops below 0.3-0.5 bar, the oil pressure sensor contacts close and the lamp is grounded. Simultaneously, the central warning lamp lights up and an acoustic signal is heard from the SID unit.

Charging indicator lamp

The charging indicator lamp is situated in the top right-hand corner of the instrument display. It tells the driver whether the battery is being charged or not.

The lamp is supplied with power in the main instrument display panel and grounded via pin 15 by generator 2.

If the generator does not rotate or charge the battery for any reason, the indicator lamp circuit will be grounded via the regulator through the generator's field winding, causing the lamp to light up.

When the generator is charging, generator terminals D+ and B+ will both have the same voltage. As a result, both terminals of the indicator lamp receive the 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.

EXH warning lamp

A warning lamp for catalytic converter overheating is fitted on cars for certain markets.

A voltage is applied to the EXH relay which operates when the temperature of the catalytic converter reaches 825 ± 25°C, causing the warning lamp to be grounded via pin 13 of the main instrument display panel.

The lamp will then remain alight until the temperature drops by about 10°C.

When the ignition is switched on the lamp is tested for about 3 seconds. If no fault is detected the lamp will go out.

Airbag warning lamp

One lamp is located behind the SRS symbol in the main instrument display panel, the central warning lamp comprises the other lamp. The SRS lamp lights up for 3 seconds when the ignition is switched on. The central warning lamp does not go out until all its warning inputs are normal. Should a fault develop in the system, the SRS lamp will start to flash and the central warning lamp will light up and stay on at the same time as the SID unit sounds an acoustic signal. The SRS lamp will continue to flash for 5 minutes and then both lamps will stay on without flashing. If the system has been activated, i.e firing current has been sent to the explosive charges in the gas generators, the SRS lamp will flash continuously and the central warning lamp will light up and stay on. The SRS 1 bulb is connected to a +15 supply from fuse 18 via pin 19 of the main instrument display panel and grounded by the airbag control module via pin 26 of the main instrument display panel.

The SRS 2 bulb (central warning lamp) is supplied with power from fuse 17 via pin 55 of the main instrument display panel and grounded by the airbag control module via pin 2 of the main instrument display panel.

CHECK ACS warning lamp

This warning lamp tells the driver if the clutch is overheating, such as may be caused by prolonged slipping.

The lamp is connected to a power supply in the main instrument display panel and grounded in the SENSONIC system via pin 27 of the main instrument display panel.

When the ignition is switched on the lamp is tested for about 3 seconds. If no fault is detected the lamp will go out.

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 is connected to a power supply in the main instrument display panel and grounded via pin 18 in the brake fluid reservoir.

At the same time, the central warning lamp lights up and the SID unit sounds an acoustic signal.

When the ignition is switched on the generator grounds the charging lamp and low brake fluid warning lamp to check their operation.

Handbrake warning lamp

The "handbrake on" warning lamp is located in the right-hand side of the main instrument display panel and informs the driver that the handbrake is applied.

The lamp is connected to a power supply in the main instrument display panel and as long as the handbrake remains on it is grounded via pin 1, causing the lamp to light up.

The central warning lamp lights up and the SID unit sounds an acoustic signal if the speed of the car exceeds 5 km/h while the handbrake is on.

ABS warning lamp

The ABS control module monitors the operation of the ABS system and in the event of a fault causes the ABS warning lamp to light up (located in the right-hand side of the main instrument display panel).

When this lamp lights up the anti-lock brake system is disconnected and the brakes then work just like a conventional brake system.

The lamp is connected to a power supply in the main instrument display panel and grounded from the ABS control module via pin 16.

At the same time as the ABS lamp lights up the central warning lamp also lights up and the SID unit sounds an acoustic signal.

When the ignition is switched on the lamp is tested for about 3 seconds. If no fault is detected the lamp will go out.

SPORT mode indicator lamp

On cars equipped with a TCM (Transmission Control Module), i.e. electronically controlled automatic transmission, the indicator lamp lights up when the SPORT button on the selector lever is pressed.

In SPORT mode, the transmission remains longer in the gears. The transmission stays in SPORT mode until the SPORT button is pressed once again, the ignition is switched off or WINTER mode is engaged.

The lamp is connected to a power supply in the main instrument display panel and grounded in the TCM control module via pin 23 of the main instrument display panel.

When the ignition is switched on the lamp is tested for about 3 seconds. If no fault is detected the lamp will go out.

WINTER mode indicator lamp

To facilitate starting on slippery road surfaces, the TCM transmission has a WINTER mode, i.e. the car starts in 3rd gear when the WINTER button (snowflake) on the selector lever is pressed.

The WINTER mode will be disengaged by pressing the WINTER button once again, switching off the ignition, when in limp-home mode or if speed exceeds about 80 km/h.

The lamp is supplied with power in the main instrument display panel and grounded in the TCM control module via pin 42 of the main instrument display panel.

When the ignition is switched on the lamp is tested for about 3 seconds. If no fault is detected the lamp will go out.

CHECK GEARBOX warning lamp

If a fault develops in the TCM automatic transmission, the CHECK GEARBOX warming lamp in the main instrument display panel will light up.

The lamp is connected to a power supply in the main instrument display panel and grounded in the TCM control module via pin 28 of the main instrument display panel.

When the ignition is switched on the lamp is tested for about 3 seconds. If no fault is detected the lamp will go out.

Low fuel indicator lamp

Information is given under "Fuel gauge".

Warning lamp CHECK ENGINE

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

The lamp is connected to a power supply in the main instrument display panel and grounded by the engine management system via pin 22 of the main instrument display panel.

When the ignition is switched on the lamp is tested for about 3 seconds by the main instrument display panel's control module.

SHIFT UP indicator lamp

Cars for certain markets are fitted with an indicator lamp which informs the driver when he should change gear to obtain the best fuel economy.

The lamp is connected to a power supply in the main instrument display panel and grounded in the engine management system via pin 39 of the main instrument display panel.

TCS OFF warning lamp

This warning lamp informs the driver when a fault has occurred in the traction control system (TCS) or if the TCS has been disconnected by means of the TCS switch.

The lamp is connected to a power supply in the main instrument display panel and grounded through the traction control system (TCS) via pin 20 of the main instrument control panel. When the ignition is switched on the lamp is tested for about 3 seconds. If no fault is detected the lamp will go out.

TCS indicator lamp

When the traction control system (TCS) is in operation the TCS lamp lights up as an acknowledgement.

The lamp is connected to a power supply in the main instrument display panel and grounded through the traction control system (TCS) via pin 41 of the main instrument display panel.

Direction indicator repeater lamps

The repeater lamps are located in the upper part of the main instrument display panel. They are connected to a power supply via pins 51 and 21 of the ICE control module and grounded in the main instrument display panel.

The lamps are connected in parallel with the direction indicator lamps on each side of the car.

CRUISE indicator lamp

The main instrument display panel contains a CRUISE indicator lamp which lights up when Cruise Control is engaged.

The lamp is supplied with power from the Cruise Control system control module via pin 50 of the main instrument display panel and is grounded in the main instrument display panel.

In the TIP position, however, the lamp goes out as acknowledgement that TIP mode has been selected.

The CRUISE indicator lamp is also used in diagnostics mode to provide information about the system.

Lights indicator lamp

Cars for some markets are fitted with an indicator lamp which shows when the lights are switched on.

The indicator lamp is supplied with power from the lights switch via pin 53 of the main instrument display panel and grounded in the main instrument display panel.

Indicator lamp, rear fog light

The rear fog light indicator lamp is located in the top left-hand corner of the main instrument display panel and informs the driver when the rear fog light is on.

The indicator lamp is connected to a power supply via pin 52 and grounded in the main instrument display panel.

Main beam indicator lamp

The indicator lamp is located in the top left-hand corner of the main instrument display panel and shows when the headlamps are switched to main beam. The lamp is supplied with power from main beam fuse 3 via pin 37 of the main instrument display panel and grounded in the main instrument display panel.

"Door open" indicator lamp

The indicator lamp is connected to a +15 supply in the main instrument display panel and grounded by the ICE control module via pin 38 of the main instrument display panel when a door is open.

Connected in series with the indicator lamp is a diode which prevents the lamp from lighting up incorrectly.