Warnings and indicators – circuit operation

WARNINGS AND INDICATORS – CIRCUIT OPERATION

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.