Warnings and Indicators

WARNINGS AND INDICATORS

CIRCUIT OPERATION

All warning Indicators are controlled by Data sent to the Instrument Cluster (Z142) from the Body Electrical Control Module (BeCM) (Z238). All data is transmitted via the serial data lines. The BeCM (Z238) will provide data based upon input from various sensors.

Some warning lights may also be accompanied by a message which will appear in the message centre display on the instrument pack.

Service Reminder Indicator (SERVICE ENGINE)
Illuminates briefly (for 3 seconds) as a bulb check when the Ignition switch is turned to position II. Illuminates continuously when the vehicle reaches 50,000 miles (80,500 km) approx.

Low Fuel Warning Indicator
Illuminates briefly (for 4 seconds) as a bulb check when the Ignition Switch is turned to position II.

When the fuel gauge sensors resistance value increases to 175 Ohms (9 liters/2.25 US gallons, the low fuel warning light will illuminate to warn of the fuel status. Both Petrol and Diesel sensors are interfaced to the Instrument Cluster (Z142) via the BeCM (Z238).

High Temperature Warning Indicator
Illuminates briefly (for 4 seconds) as a bulb check when the Ignition switch is turned to position II.

The engine coolant temperature gauge sensor has the capability to sense from -40 °C to +130 °C. Petrol and Diesel resistance valves are different.

Both Petrol and Diesel sensors are interfaced to the Instrument Cluster (Z142) via the BeCM (Z238).

Malfunction Indicator Lamp (CHECK ENGINE)
Illuminates briefly when the Ignition Switch is turned to position II as a bulb check and extinguishes when the engine is running. Illumination at any other times indicates an engine fault.

Both Petrol and Diesel Engine Control Modules (Z132) are interfaced to the Instrument Cluster (Z142) via the BeCM (Z238).

Oil Pressure Warning Indicator
Illuminates as a bulb check when the Ignition switch is turned to position II, and extinguishes when the engine is running.

The Oil Pressure Switch (X149) is closed with Low Oil Pressure.

Both Petrol and Diesel switches are interfaced to the Instrument Cluster (Z142) via the BeCM (Z238).

ABS Warning Indicator
This light illuminates for approximately 1 second when the Ignition switch is turned to position II, and then briefly extinguishes before coming on again. The warning indicator will then remain illuminated until the vehicle is driven above approximately 5 mph (7 km/h). If the light does not extinguish or illuminates again then a fault has occurred with the ABS system.

If the light remains illuminated once a speed of 5 mph (7km/h) has been reached, or subsequently illuminates whilst driving, a fault has been detected by the self monitoring system. The message centre will display "ABS FAULT".

The ABS System is interfaced to the Instrument Cluster (Z142) via the BeCM (Z238).

ETC Warning Indicator (TC)
Illuminates for 3 seconds after the Ignition switch is turned on and the ABS and traction control systems have completed their self-checks.

Whilst driving, the TC light will illuminate (for a minimum of 2 seconds) whenever traction control is active; the light extinguishing as soon as traction control ceases. The light flashing (for at least 10 seconds) indicates that the system has been over-used; it will be available again once the system components have cooled.

If the light illuminates continuously, a fault with the system is indicated.

The ABS System is interfaced to the Instrument Cluster (Z142) via the BeCM (Z238).

Brake Warning Indicator
Illuminates for 3 seconds as a bulb check when the Ignition switch is turned to position II and also illuminates when the handbrake is applied and the Ignition switch is in position II.

The light should extinguish when the handbrake is fully released or after the bulb check if the handbrake is off. If the light illuminates whilst driving, a fault is indicated.

NOTE: If the vehicle has been standing for some time, it may take up to 40 seconds before the light extinguishes (in this case, ABS and TC warning lights will also be illuminated).

The Brake System and Handbrake Switch (X191) are interfaced to the Instrument Cluster (Z142) via the BeCM (Z238).

Cruise Active Indicator
When the Cruise Control System has been activated the indicator will be illuminated. The Cruise System is interfaced to the Instrument Cluster (Z142) via the BeCM (Z238).

Charge Warning Indicator
Illuminates as a bulb check when the Ignition switch is turned to position II and extinguishes when the engine is running and the Generator (Z106) is producing normal power. If the Generator (Z106) is not producing normal power or the Generator (Z106) stops turning the indicator will illuminate.

Both Petrol and Diesel Generators (Z106) are interfaced to the Instrument Cluster (Z142) via the BeCM (Z238).

Fasten Seat Belt Indicator
Illuminates for 6 seconds when the Ignition switch is turned to position II. When the driver s seat belt is buckled, the indicator turns off.

The Driver's Seat Belt Switch (X120) is interfaced to the Instrument Cluster (Z142) via the BeCM (Z238).

Air Suspension Indicator
Illuminates as a bulb check when the Ignition switch is turned to position II and remains illuminated until 2 seconds after the engine has started.

In addition, the light will illuminate whilst driving whenever "High" or "Extended" ride heights are selected, and also if a fault with the air suspension system is detected.

The air suspension system is interfaced to the Instrument Cluster (Z142) via the BeCM (Z238).

Lights "ON" Indicator
This light illuminates when the sidelights and/or headlights are switched on. It will not illuminate when parking lights or headlight delay are in operation.

The Main Light Switch is interfaced to the Instrument Cluster (Z142) via the BeCM (Z238).

Direction Indicators
The left or right warning indicator flashes in time with the corresponding left or right direction indicator lamps whenever they are operated. A warning indicator flashing twice the normal speed indicates that a direction indicator lamp bulb has failed (the message centre will indicate which bulb is faulty). If a trailer is connected and a rear indicator lamp bulb fails then the message will not be displayed. When the hazard switch is pressed, both warning indicators will illuminate in conjunction with the indicator lamps.

The Direction Indicator switches are interfaced to the Instrument Cluster (Z142) via the BeCM (Z238).

Main Beam Indicator
This indicator illuminates whenever the main beam headlights are on.

The Main Beam Switch is interfaced to the Instrument Cluster (Z142) via the BeCM (Z238).

Trailer Indicator
This indicator is only operative when a trailer is connected to the vehicle via a multi-pin socket. The indicator flashes in conjunction with the vehicle direction indicator lamps, thus confirming that the trailer indicator lamps are operating correctly. In the event of a failure of a trailer direction indicator lamp, the warning indicator will not illuminate.

The Trailer Auxilliary Socket is interfaced to the Instrument Cluster (Z142) via the BeCM (Z238).

Glow Plug Indicator
This indicator illuminates when the Engine Control Module (Z132) activates the Glow Plug Timer Unit (Z135).

The Engine Control Module (Z132) is interfaced to the Instrument Cluster (Z142) via the BeCM (Z238).

Catalyst Warning Indicator (Japan Only)
This indicator illuminates when a fault in the catalyst system is detected.

The Catalyst Overheat Sensors (X299, X300) and the Catalyst Amplifier (X301) are interfaced to the Instrument Cluster (Z142) via the BeCM (Z238).

Audible Warning
Receipt of an audible warning request signal from a vehicle parameter/message condition shall cause the BeCM (Z238) to generate the required number of warning tones. The actuator sounder unit is located at the rear of the Instrument Cluster (Z142).

See message listing for categories/priority and levels of audible warnings.