Glow Plug; Description; Operation; Camshaft Position Sensor Description - Chrysler Dodge Caravan 2002 Manual

8Ia - 2 IGNITION CONTROL
GLOW PLUG RELAY (Continued)
The Glow Plug lamp is tied to this circuit. Lamp
operation is also controlled by the ECM.
With a cold engine, the glow plug relays and glow
plugs may be activated for a maximum time of 200
seconds. Refer to the following Glow Plug Control
chart for a temperature/time comparison of the glow
plug relay operation.
In this chart, Pre-Heat and Post-Heat times are
mentioned. Pre-Heat is the amount of time the glow
plug relay control circuit is activated when the igni-
tion (key) is switched ON, without the engine run-
ning. Post-Heat is the amount of time the glow plug
relay control circuit is activated after the engine is
operated. The Glow Plug lamp will not be activated
during the post-heat cycle.
Engine Wait-To
Coolant Start Lamp
Temperature ON
Key ON (Seconds)
-30C 20 SEC.
-10C 8 SEC.
+10C 6 SEC.
+30C 5 SEC.
+40C 4 SEC.
+70C 1 SEC.
CAMSHAFT POSITION
SENSOR

DESCRIPTION

The camshaft position (CMP) sensor is mounted in
the top of cylinder head cover/intake manifold at the
rear of the engine. The CMP sensor is a hall effect
device (Fig. 3).
Fig. 3 CAMSHAFT POSITION SENSOR
Pre-Heat Post-Heat
Cycle Cycle
(Glow (Seconds)
Plugs On
Seconds)
35 SEC. 200 SEC.
23 SEC. 180 SEC.
21 SEC. 160 SEC.
20 SEC. 140 SEC.
19 SEC. 70 SEC.
16 SEC. 20 SEC.

OPERATION

The CMP sensor is a hall effect switch. A tooth
made of a ferromagnetic material is attached to the
camshaft. When this tooth passes the CMP sensor an
lectronic signal is created. This signal is then sent to
the engine control module (ECM). This signal is used
by the ECM to determine which cylinder has just
entered its compression phase.

REMOVAL

(1) Disconnect negative battery cable.
(2) Remove engine cover (Refer to 9 - ENGINE
COVER - REMOVAL).
(3) Disconnect camshaft position sensor electrical
connector (Fig. 4).
Fig. 4 CAMSHAFT POSITION SENSOR LOCATION
1 - CAMSHAFT POSITION SENSOR
2 - CAMSHAFT POSITION SENSOR ELCTRICAL SENSOR
3 - FUEL INJECTOR
4 - CYLINDER HEAD COVER
5 - OIL SEPARATOR
(4) Remove sensor retaining bolt and remove sen-
sor from cylinder head cover.

INSTALLATION

(1) Lubricate O-ring and install sensor in cylinder
head cover. Torque retaining bolt to 5.4 N·m.
(2) Connect camshaft position sensor electrical
connector.
(3) Install engine cover (Refer to 9 - ENGINE
COVER - INSTALLATION).
(4) Connect negative battery cable.
RG