2003 JEEP GRAND CHEROKEE fuel pump

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Page 1429 of 2199

JEEP GRAND CHEROKEE 2003 WJ / 2.G Workshop Manual (5) Connect (-) and (+) test cable leads into LCS
adapter receptacles. Use10 amp (10A +)receptacle
and common (-) receptacles.
(6) Gain access to MAIN MENU on DRB screen.
(7) Press DVOM button on DRB.

Page 1430 of 2199

JEEP GRAND CHEROKEE 2003 WJ / 2.G Workshop Manual (19) Disconnect test leads from relay cavities
immediately after testing.
FUEL PUMP PRESSURE TEST
Use this test in conjunction with other fuel system
tests. Refer to the Fuel Pump Capacity Test, Fuel

Page 1431 of 2199

JEEP GRAND CHEROKEE 2003 WJ / 2.G Workshop Manual (b) If line is not kinked and pressure is low,
raise vehicle and disconnect fuel pressure line at
fuel filter/fuel pressure regulator (Fig. 15) . Three
fuel lines are attached to filter/regulator. The

Page 1432 of 2199

JEEP GRAND CHEROKEE 2003 WJ / 2.G Workshop Manual (e) Use DRB scan tool to power fuel pump. If
pressure is now within specifications, replace fuel
filter/fuel pressure regulator.
(f) If pressure is still low, replace fuel pump
module.
(4) If operatin

Page 1433 of 2199

JEEP GRAND CHEROKEE 2003 WJ / 2.G Workshop Manual (2) Drain fuel tank and remove tank. Refer to Fuel
Tank Removal/Installation.
(3) Thoroughly wash and clean area around pump
module to prevent contaminants from entering tank.
(4) Disconnect fuel retu

Page 1434 of 2199

JEEP GRAND CHEROKEE 2003 WJ / 2.G Workshop Manual (8) Connect fuel return and pressure lines to fuel
pump module fittings (Fig. 16). Refer to Quick-Con-
nect Fittings.
(9) Install fuel tank. Refer to Fuel Tank Installa-
tion.
FUEL RAIL
DESCRIPTION
DE

Page 1438 of 2199

JEEP GRAND CHEROKEE 2003 WJ / 2.G Workshop Manual (14) Install air tube (or duct) at top of throttle
body.
(15) Install fuel tank cap.
(16) Connect negative battery cable to battery.
(17) Start engine and check for fuel leaks.
FUEL TANK
DESCRIPTION
T

Page 1439 of 2199

JEEP GRAND CHEROKEE 2003 WJ / 2.G Workshop Manual (19) Disconnect fuel return line at fuel filter/fuel
pressure regulator (Fig. 36). Refer to Quick-Connect
Fittings for procedures.
(20) Disconnect fuel pressure line at fuel filter/fuel
pressure regul