D.
DRVR. & PASS COIL (mandatory) - The ignition system on this engine is a
multiple coil configuration called coil per plug. The ignition coil mounting bracket
is attached to the rocker cover. The secondary ignition wires are short compared
to a distributor ignition system wire. See Figure 6.21 & 6.22
E.
ECT (mandatory) - The (PCM) supplies a 5.0 volt signal to the Engine Coolant
Temperature (ECT) sensor through a resistor in the PCM and measures the
voltage. The voltage is high when the engine is cold. The voltage is low when the
engine is hot. The PCM calculates the engine coolant temperature by measuring
the voltage. The engine coolant temperature affects most systems the PCM
controls. See Figure 6.23
F.
EGR (optional) – An Exhaust Gas Recirculation (EGR), system is used to lower
oxides of nitrogen (NOx) emission levels. The EGR system accomplishes this by
feeding small amounts of exhaust gas back into the combustion chamber. High
combustion temperatures cause NOx. Combustion temperatures are reduced
when the air/fuel mixture is diluted with the exhaust gases. See Figure 6.10
G.
GROUND (mandatory) - These circuits are used to provide ground for the
various devises. Connect these wires under a bolt in the engine block,
transmission, or cylinder head. These are the grounds for the entire injection
system. For best results from your EFI system, be certain your grounding
surfaces are clean and your connections are secure.
H.
IAC (mandatory) - The purpose of the Idle Air Control Motor (IAC) is to control
engine idle speed. The IAC valve, mounted in the throttle body, controls the
amount of bypass air. See Figure 6.19
I.
INJ #1 - #8 (mandatory) – The Multec 2 fuel injector assembly is a solenoid
operated device, controlled by the PCM that meters pressurized fuel to a single
engine cylinder. An injector that has been sitting for more than 6 months will
need to be cleaned/ replaced as the varnish residue in the fuel will cause the
injector to stick closed. This will keep the injector from delivering fuel as needed
by the injection system. See Figure 6.16 & 6.17
J.
KNOCK (mandatory) – To control spark knock, a Knock Sensor (KS) system is
used. This system is designed to retard spark timing up to 20 degrees to reduce
spark knock in the engine. This allows the engine to use maximum spark
advance to improve drivability and fuel economy. See Figure 6.11
K.
LEFT & RIGHT O2 SEN. (mandatory) – The PCM uses the signal voltage from
heated oxygen sensors in a Closed Loop to adjust the fuel injector pulse width.
In Closed Loop, the PCM adjust fuel delivery to maintain an air to fuel ratio which
allows the best combination of emission control and drivability. See Figure 6.12
L.
MAF-IAT (mandatory) – The Mass Air Flow (MAF) sensor measures the
amount of air which passes through the sensor. The PCM uses this information to
determine the operating condition of the engine in order to control the fuel
delivery. A large quantity of air indicates acceleration. A small quantity of air
indicates deceleration or idle. See Figure 6.20
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