Instrument Cluster Circuit Description - GMC Chevrolet Camaro 1998 Service Manual

8-540 Instrument Panel, Gauges and Console
Check Gages Indicator Lamp
The CHECK GAGES indicator lamp alerts the driver to
inspect the instrument cluster gages when any of
the following abnormalities are detected:
• The coolant temperature is too high.
• The generator voltage is too high.
• The generator voltage is too low.
• The oil pressure is too low.
The indicatqr lamp also comes on for about one
second ·after the ignition is placed into the BULB TEST
position.
LOW TRAC Indicator Lamp
ASR and TCS Systems
On vehicles equipped with accelerated slip regulation
(ASR) or traction control systems (TCS) the LOW
TRAC indicator lamp comes on in order to indicate the
following situations:
• The system is active.
• The system is limiting wheel spin.
The LOW TRAC lamp will turn on during the following
situations:
• ABS initialization
• An ABS stop
• A TCS event
The LOW TRAC lamp will remain 6n for approximately
3 seconds and will then turn off.
The LOW TRAC indicator lamp also comes on when
the antilock brake system (ABS) is adjusting brake
pressure in order to help avoid a skid.
SECURITY Indicator Lamp
The SECURITY indicator lamp .is part of the theft
deterrent system. This lamp will come on if one of the
following conditions exists:
• The body control module (BCM) is preventing the
engine from starting.
• The BCM is not properly programmed.
• The ignition has been turned to the BULB TEST
position. The lamp will light for approximately
5 seconds.
Skip Shift Indicator Lamp
VB Manual Only
When the SKIP SHIFT indicator lamp is on the
manual transmission can only be shifted from first
gear to fourth gear. For more information on skip shift,
refer to Engine Controls.
Body. and Accessories
TCS OFF ~ndicator Lamp
Pontiac VB Only
The traction control system (TCS), if equipped, limits
wheel spin if the TCS senses that one or both of
the re~r wheels are begfnning to lose traction. When
this happens, the TCS works the rear brakes and
reduces engine power in order to limit wheel spin.
The TCS OFF indicator lamp will come on when one
of the following conditions exists:
• There is a system failure. .
• The driver turns off the TCS.
• The engine i~ starting.
When the ignition switch is turned to the crank
position the following lamps will come on:
• ABS INOP
• ASR
• TCS OFF
These lamps will remain on if the switch is held in the
crank position.
Service Vehicle Lamp
The SERVICE VEHICLE warning light comes on for a
3 second bulb check when the vehicle is first
started . . This light will stay on steady if there are
certian non-emission related vehicle problems. These
problems rnay not be obvious and may affect
vehicle performance or durability.
Red1;1ced Engine Power Lamp
The REDUCED ENG PWR warning light comes on for
a 3 second bulb check when the vehicle is first
started. When this light comes on a noticeable
reduction in the vehicle's performance may occur. The
vehicle may be driven at a reduced speed while the
light is on. Acceleration and speed may be reduced.
Instrument Cluster Circuit Description
Circuit Operation
The instrument cluster contains analog gauges and
indicators. Some of the gauges and indicators
are controlled by solid-state controls within the cluster.
The other gauges and indicators are controlled by
direct circuits into the cluster from other components.
These operations are described here briefly.
"ABS INOP" Indicator
Refer to Antilock Brake System.
"AIR BAG" Indicator
Refer to Supplemental Inflatable Restraints.
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