2002 JEEP GRAND CHEROKEE Time

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Page 1462 of 2199

JEEP GRAND CHEROKEE 2002 WJ / 2.G Workshop Manual (5) Push sensor against flywheel/drive plate. With
sensor pushed against flywheel/drive plate, tighten
mounting bolt to 7 N´m (60 in. lbs.) torque.
(6) Route sensor wiring harness into wire shield.
(

Page 1463 of 2199

JEEP GRAND CHEROKEE 2002 WJ / 2.G Workshop Manual The PCM determines injector on-time (pulse width)
based on various inputs.
DIAGNOSIS AND TESTING - FUEL INJECTOR
To perform a complete test of the fuel injectors and
their circuitry, use the DRB scan

Page 1464 of 2199

JEEP GRAND CHEROKEE 2002 WJ / 2.G Workshop Manual The PCM uses the IAC motor to control idle speed
(along with timing) and to reach a desired MAP dur-
ing decel (keep engine from stalling).
The IAC motor has 4 wires with 4 circuits. Two of
the wires

Page 1467 of 2199

JEEP GRAND CHEROKEE 2002 WJ / 2.G Workshop Manual MAP SENSOR
DESCRIPTION
DESCRIPTION
On the 4.0L six-cylinder engine the MAP sensor is
mounted to the engine throttle body. On the 4.7L V-8
engine the MAP sensor is mounted to front of the
intake manifo

Page 1469 of 2199

JEEP GRAND CHEROKEE 2002 WJ / 2.G Workshop Manual The other two heater elements (downstream sen-
sors 1/2 and 2/2) are controlled by the downstream
heater relay through output signals from the PCM.
To avoid a large simultaneous current surge, power
i

Page 1475 of 2199

JEEP GRAND CHEROKEE 2002 WJ / 2.G Workshop Manual (7) From inside vehicle, install clip holding cable
to dashpanel (Fig. 16).
(8) From inside vehicle, slide throttle cable core
wire into opening in top of pedal arm.
(9) Push cable retainer (clip) int

Page 1481 of 2199

JEEP GRAND CHEROKEE 2002 WJ / 2.G Workshop Manual LOOSE STEERING AND VEHICLE LEADS/DRIFTS
CONDITION POSSIBLE CAUSE CORRECTION
EXCESSIVE PLAY IN STEERING
WHEEL1. Worn or loose suspension or
steering components.1. Repair as necessary.
2. Worn or loose

Page 1482 of 2199

JEEP GRAND CHEROKEE 2002 WJ / 2.G Workshop Manual (8) Start engine and let idle long enough to circu-
late power steering fluid through flow/pressure test
gauge.
(9) Shut off the engine and check the fluid level,
add fluid as necessary. Start engine