Warning and indicator lamps
| Warning and indicator lamps |
The INFO DISPL lamp lights up when a message is displayed on the SID unit. The lamp is supplied with current (+15 circuit) from the main instrument unit and grounded by the MIU's control module. The SID unit 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.
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 current (+15 circuit) from the main instrument unit and grounded by the MIU's control module when one of the following warning or indicator lamps lights up:
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AIRBAG lamp
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Oil pressure lamp
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Charging lamp
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Brake fluid warning lamp
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Handbrake lamp
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ABS warning lamp (progressive introduction)
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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:
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Coolant temperature exceeds 129°C.
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At the same time as the central warning lamp lights up, the main instrument sends bus information to the SID unit to activate an acoustic signal. This does not occur when the car is started as the lamps are only checked, the engine speed must exceed 300 rpm for this request.
Diagnostics
The function has no diagnostics.| Note | ||
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The function of the ABS warning lamp will be changed progressively during model year '98. The new function will be that when the ABS warning lamp lights up, the fluid level warning lamp and central warning lamp will light up at the same time. The wiring between the ABS control module and the main instrument unit will remain the same. |
| 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.
The oil pressure sensor will close if the oil pressure is below 0.3-0.5 bar, the circuit is grounded and the lamp lights up. The central warning lamp lights up at the same time and at engine speeds higher than 300 rpm, MIU sends a request to the SID unit to activate the 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 does not rotate or does not charge, the circuit is grounded for the warning lamp via the regulator through the generator field winding, and the lamp goes on. The central warning lamp lights up at the same time and at engine speeds higher than 300 rpm, MIU sends a request to the SID unit to activate the 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 about 3 seconds.
Diagnostics
Open circuit/shorting generates a diagnostic trouble code in the ABS 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 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 is also lit and at engine speeds higher than 300 rpm, MIU sends a request to the SID unit to activate the 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 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 unit for activation of an acoustic signal.
Diagnostics
The function has no diagnostics.| ABS warning lamp |
The ABS control module monitors the function of the ABS system and, in case of a malfunction, lights the ABS warning lamp on the right side of the main instrument display panel.
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.
| Note | ||
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The function of the ABS warning lamp will be changed progressively during model year '98. The new function will be that when the ABS warning lamp lights up, the fluid level warning lamp and central warning lamp will light up at the same time. The wiring between the ABS control module and the main instrument unit will remain the same. |
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:
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When the sport button is depressed again.
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When the transmission is in Limp-home mode.
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When Winter mode is selected.
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If the ignition is turned off and then on again.
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The selector lever is moved to P or R.
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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:
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When the Winter button is pressed again.
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When the transmission is in Limp-home mode.
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If the ignition is turned off and then on again.
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The transmission fluid temperature is above 140°C.
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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, the 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 power in the main instrument and are grounded by the main instrument control module. DICE continuously sends bus information status on INDICATORS RIGHT and 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 below 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 power in the main instrument and grounded by the main instrument control module. DICE continuously sends bus information REAR FOG LIGHTS, unit ON/OFF.
At REAR FOG LIGHTS ON, the control module grounds the lamp output and the lamp is lit.
If DICE changes bus information status to REAR FOG LIGHTS 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 power from main beam fuse 10 to connection 15 (K20) on the main instrument and is grounded in the main instrument.
Diagnostics
The function has no diagnostics.| Selector lever position indicator |
On cars with automatic transmission, the selector lever Position indicator shows the selected gear by illuminating respective 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:
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Selector lever position
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P
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ON
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Selector lever position
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R
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OFF
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Selector lever position
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N
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OFF
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Selector lever position
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D
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OFF
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Selector lever position
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3
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OFF
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Selector lever position
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2
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OFF
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Selector lever position
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1
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OFF
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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:
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Driver's door
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Open
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Passenger's door
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Closed
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Rear door LH
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Closed
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Rear door RH
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Closed
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Tailgate
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Closed
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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.This project is supported by memberships and donations. If you use this site, please consider Joining SCNA and/or making a donation.
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