FUEL SYSTEM
TABLE OF CONTENTS
page
page
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FUEL INJECTION
TABLE OF CONTENTS
page
page
CAMSHAFT POSITION SENSOR
. . . . . . . . . . . . . . . . . . . . . . . . . . 1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
. . . . . . . . . . . . . . . . . . . . . . . . . . 2
CRANKSHAFT POSITION SENSOR
. . . . . . . . . . . . . . . . . . . . . . . . . . 2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
FUEL PRESSURE SENSOR
. . . . . . . . . . . . . . . . . . . . . . . . . . 2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
. . . . . . . . . . . . . . . . . . . . . . . . . . 3
FUEL INJECTOR
. . . . . . . . . . . . . . . . . . . . . . . 4
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
STANDARD PROCEDURE - CLEANING FUEL
. . . . . . . . . . . . . . . . . . . . . . . . . . . 5
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
. . . . . . . . . . . . . . . . . . . . . . . . . . 6
FUEL RAIL
. . . . . . . . . . . . . . . . . . . . . . . . . . 7
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
. . . . . . . . . . . . . . . . . . . . . . . . . . 8
MANIFOLD AIR FLOW (MAF) SENSOR
. . . . . . . . . . . . . . . . . . . . . . . . . . 8
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
. . . . . . . . . . . . . . . . . . . . . . . . . . 8
FUEL PRESSURE SOLENOID
. . . . . . . . . . . . . . . . . . . . . . . . . . 9
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
INSTALLATION - FUEL PRESSURE SOLENOID
BOOST PRESSURE SENSOR
. . . . . . . . . . . . . . . . . . . . . . . . . 10
. . . . . . . . . . . . . . . . . . . . . . . . . . . 11
. . . . . . . . . . . . . . . . . . 11
INTAKE AIR TEMPERATURE SENSOR
. . . . . . . . . . . . . . . . . . . . . . . . . 11
. . . . . . . . . . . . . . . . . . . . . . . . . . . 11
CAMSHAFT POSITION
SENSOR
DESCRIPTION
The camshaft position sensor is mounted on the
cylinder head cover (Fig. 1). The sensor detects the
camshaft position contactlessly (hall effect) by means
of a segment at the camshaft. The electronic control
module (ECM) detects TDC position of cylinder 1 by
means of the signal supplied by the camshaft sensor.
Injection timing is synchronized by means of the
camshaft signal and the crankshaft signal.
OPERATION
The signal circuit of the camshaft sensor has a
voltage
of
approximately
5V.
If
the
segment
machined into the exhaust camshaft sprocket is posi-
tioned opposite the camshaft sensor, the camshaft
signal is approximately 0V. This 0V to 5V signal is
used by the engine control module (ECM) for detect-
ing ignition TDC of cylinder 1 as the engine rotates.
If no signal is supplied by the camshaft position sen-
sor, the vehicle will not start.
REMOVAL
(1) Disconnect negative battery cable.
WG
FUEL SYSTEM
14a - 1