11.0 REQUIRED TOOLS AND EQUIPMENT
ammeter
DRB (diagnostic read-out box) scan tool
jumper wires and probes
ohmmeter
vacuum gauge
voltmeter
12.0 GLOSSARY OF TERMS
backfire,
popbackfuel ignites in either the intake or the exhaust system
BCMbody control module
cuts out,
missesa steady pulsation or the inability of the engine to maintain a consistent
rpm
DLCdata link connector (previously called ``engine diagnostic connector'')
detonation,
pre-ignitiona mild to severe ping, especially under loaded engine conditions
ECMengine control module
ECTengine coolant temperature sensor
EGRexhaust gas recirculation valve and system
generatorpreviously called ``alternator''
hard startThe engine takes longer than usual to start, even though it is able to
crank normally.
hesitation,
sag, stumbleThere is a momentary lack of response when the throttle is opened.
This can occur at all vehicle speeds. If it is severe enough, the engine
may stall.
IATintake air temperature sensor
lack of power,
sluggishThe engine has less than expected power, with little or no increase in
vehicle speed when the throttle is opened.
MILmalfunction indicator lamp
PDCpower distribution center
poor fuel
economyThere is significantly less fuel mileage than other vehicles of the same
design and configuration.
G
E
N
E
R
A
L
I
N
F
O
R
M
A
T
I
O
N
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rough,
un-stable or
erratic idle
stallingThe engine runs unevenly at idle and causes the engine to shake if it is
severe enough. The engine idle rpm may vary (called ``hunting''). This
condition may cause stalling if it is severe enough.
SKIMSentry key immobilizer module
SKISSentry key immobilizer system
start and
stallThe engine starts but immediately dies.
surgeengine rpm fluctuation without corresponding change in throttle position
sensor
SRCsignal range check
VSSvehicle speed sensorG
E
N
E
R
A
L
I
N
F
O
R
M
A
T
I
O
N
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