Jeep 1997 Grand Cherokee Service Manual page 1851

IDLE AIR CONTROL MOTOR
IDLE AIR CONTROL PAS- THROTTLE BODY SAGE INLET THROTTLE
ZG
REMOVAL AND INSTALLATION (Continued)
Fig. 65 Throttle Body Mounting Bolts—5.2L/
5.9LEngines—Typical
THROTTLE BODY—4.0L ENGINE
A (factory adjusted) set screw is used to mechani-
cally limit the position of the throttle body throttle
plate. Never attempt to adjust the engine idle
speed using this screw. All idle speed functions are
controlled by the powertrain control module (PCM).
REMOVAL
(1) Remove the air cleaner duct at throttle body.
(2) Disconnect throttle body electrical connectors
at MAP sensor, IAC motor and TPS (Fig. 66).
Fig. 66 Throttle Body and Sensor Locations—
4.0LEngine
BODY MOUNTING BOLTS (4)
MOUNTING SCREWS
THROTTLE POSITION SEN- SOR
(3) Remove all control cables from throttle body
(lever) arm. Refer to the Accelerator Pedal and Throt-
tle Cable section of this group for additional informa-
tion.
(4) Remove four throttle body mounting bolts.
(5) Remove throttle body from intake manifold.
(6) Discard old throttle body-to-intake manifold
gasket.
INSTALLATION
(1) Clean the mating surfaces of the throttle body
and the intake manifold.
(2) Install new throttle body-to-intake manifold
gasket.
(3) Install throttle body to intake manifold.
(4) Install four mounting bolts. Tighten bolts to 11
N·m (100 in. lbs.) torque.
(5) Install control cables.
(6) Install electrical connectors.
(7) Install air duct at throttle body.
THROTTLE POSITION SENSOR (TPS)—5.2L/5.9L
ENGINES
REMOVAL
The TPS is located on the side of the throttle body.
(1) Remove air duct at throttle body.
(2) Disconnect TPS electrical connector.
(3) Remove two TPS mounting bolts (Fig. 67).
Fig. 67 TPS Mounting Bolts—5.2L/5.9LEngines—
(4) Remove TPS from throttle body.
INSTALLATION
The throttle shaft end of the throttle body slides
into a socket in the TPS (Fig. 68). The TPS must be
installed so that it can be rotated a few degrees. If
the sensor will not rotate, install the sensor with the
throttle shaft on the other side of the socket tangs.
The TPS will be under slight tension when rotated.
FUEL SYSTEM
Typical
14 - 57