20 Most Recent 2003 Jeep Grand Cherokee Questions & Answers


2003 jeep GC, or WJ jeep, it is..?
there are no 50a fuses in any JB,
there are just 4 in the PDC. engine bay.
so, JB is wrong, input to me.
ill assume F15 is correct, and not F3/7/12 in PDC
F15 feeds JB via a pink wire. (pk-wt)
this main F15 feed JB , F5,7,8,9 fuse in cab.

so pull fuse 5 to 9 there and the one that ends the drain
is the load that is leaking, (phantom drains)
easy, huh, just 4 fuse to pull.
Cab box, only. called JB on all jeeps.
jb fuse 5 is radio.
jb fuse 7 is HVAC zone control (heat?) skim mod. & auto head lamp sensor & BCM memory, (yes lots)
jb fuse 8 is (12 courtesy lamps , intrusion module(export) and VICS, vehicle info center(memory)
jb fuse 9, front12vdc power outlets (cig ports modern) Cell Phone arked there?

or login at alldata.com and see all that, in the wiring pages.

2003 Jeep Grand... | Answered on Sep 16, 2019


What kind of Jeep (model,engine size).
Is it turning over?
Is the battery dead?
I need alot more information.

2003 Jeep Grand... | Answered on Jul 14, 2019


Read this post about a lot of electrical problems. It will give you an idea on what to look for.
https://www.cnet.com/forums/discussions/the-famous-jeep-grand-cherokee-electrical-problem-272172/5/
When it does not crank, check to see if voltage is getting to the starter. If it is, hit the starter. If it starts , replace it.

2003 Jeep Grand... | Answered on May 02, 2019


When you say the jeep will not turn over, you mean that it will not crank? If that is so then you may have a bad starter or coolant may have filled a cylinder with water. Pull out the spark plugs and see if it will crank over, check to see if water comes out of the heads when cranking. If it still does not turn over, check the starter.

2003 Jeep Grand... | Answered on Apr 22, 2019


Some fixya user told me a website reliable-store it is very good.. I used it to repair my shredder it had some spark issue which wasn't easily fixed. you can go there and try

2003 Jeep Grand... | Answered on Mar 02, 2019


Unfortunately, the relay may be located inside the transmission. Try utube if you have not already.

If you need further help, reach me via phone at https://www.6ya.com/expert/gary_9c859f4aa7e5ab10

2003 Jeep Grand... | Answered on Feb 21, 2018


Have them check your fuel filter, may be time to change- please also google the jeep to see if this is common!? Good Luck Stevo!!

2003 Jeep Grand... | Answered on Jan 14, 2018


code p 0122 causes are wiring short to ground , TP/APP sensor --ECM
or also wiring open/ short to ground / short to positive TP/APP---ECm
so check the wiring and connections
code p 0107 is map and /or BARO sensor --low input===causes ---wiring short to ground ---MAP sensor ---BARO sensor--ECM

2003 Jeep Grand... | Answered on Dec 23, 2017


remove door panel and check to see if glass is attached to bar that raises the window up and down as they do come loose
I would use a good glue check with the window repair for some
so you get the right stuff

2003 Jeep Grand... | Answered on Dec 02, 2017


DTC P0243 - Turbo/Super Charger Wastegate Solenoid A
Description: Open or shorted condition detected in the turbocharger wastegate solenoid control circuit.


Here is the flow chart for that code (some images could need to clicking for zoom)...

P0243-WASTEGATE PRESSURE CONTROL PWM

zjlimited_337.gif

For a complete wiring diagram Refer to Section 8W.

When Monitored: When the ignition is on.
Set Condition: The ECM detects an open or short circuit in the Wastegate solenoid circuit.

Possible Causes
DAMAGED WIRING HARNESS OR CONNECTORS
WASTEGATE SOLENOID
(F504) FUSED IGNITION SWITCH OUTPUT OPEN
(K139) WASTEGATE SOLENOID DRIVER CIRCUIT OPEN
(K139) WASTEGATE SOLENOID CIRCUIT SHORTED TO GROUND
(K139) WASTEGATE SOLENOID DRIVER SHORTED TO VOLTAGE
(K139) WASTEGATE SOLENOID DRIVER CIRCUIT SHORTED TO ANOTHER CIRCUIT
ECM
INTERMITTENT CONDITION

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)

Diagnostic Test
1. DAMAGED WIRING HARNESS OR CONNECTORS

zjlimited_338.gif

Turn Ignition off.
Disconnect the ECM harness connectors.
Disconnect the Wastegate Solenoid harness connector.

NOTE: Check connectors - Clean/repair as necessary.


Are any wires or pins damaged?

Yes
Repair or replace any damaged wire or connectors.
Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL).

No
Go To 2


2. WASTEGATE SOLENOID

zjlimited_339.gif

Reconnect the ECM harness connector.
Reconnect the disconnected Wastegate Solenoid harness connector.
Turn the Ignition on, engine not running.
Disconnect the Wastegate Solenoid harness connector.
Connect an incandescent test light across the supply and driver pins at the Wastegate Solenoid harness connector.

NOTE: The ECM will perform a self check of the circuit after approximately 30 seconds, which should light the incandescent test light.


Does the light illuminate brightly after 30 seconds of being connected?

Yes
Replace the Wastegate Solenoid.
Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL).

No
Go To 3


3. (F504) FUSED IGNITION SWITCH OUTPUT OPEN

zjlimited_340.gif

Connect an test light between the Wastegate Solenoid connector Fused ignition switch output circuit and battery negative.
Compare the test light brightness to that of a direct connection to the battery.

Does the light illuminate brightly?
Yes
Go To 4

No
Repair the open (F504) Fused Ignition switch output circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL).



4. (K139) WASTEGATE SOLENOID DRIVER CIRCUIT OPEN

zjlimited_341.gif

Disconnect the ECM harness connectors.
Measure the resistance of the Wastegate Solenoid driver circuit between the Wastegate Solenoid harness connector and the ECM harness connector.

Is the resistance less than 10 Ohms?
Yes
Go To 5

No
Repair the open (K139) Wastegate Solenoid control circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL).


5. (K139) WASTEGATE SOLENOID CIRCUIT SHORTED TO GROUND

zjlimited_343.gif

Measure the resistance of the (K139) Wastegate Solenoid driver circuit between the Wastegate Solenoid harness connector and battery negative.

Is the resistance less than 10 Ohms?
Yes
Repair the (K139) Wastegate solenoid circuit shorted to ground.
Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL).

No
Go To 6


6. (K139) WASTEGATE SOLENOID DRIVER SHORTED TO VOLTAGE

zjlimited_344.gif

Measure the voltage between the (K139) Wastegate Solenoid driver circuit at the Wastegate Solenoid connector and battery negative.

Is the voltage less than 1 volt?
Yes
Go To 7

No
Repair the (K139) Wastegate solenoid driver shorted to voltage.
Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL).


7. (K139) WASTEGATE SOLENOID DRIVER CIRCUIT SHORTED TO ANOTHER CIRCUIT

zjlimited_345.gif

Measure the resistance between the (K139) Wastegate Solenoid driver circuit in the ECM harness connector and all other circuits in the ECM harness connectors.

Is the resistance less than 10 Ohms?
Yes
Repair the (K139) Wastegate solenoid circuit shorted to another circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL). (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)


No
Go To8


8. WASTEGATE SOLENOID

zjlimited_346.gif
Reconnect the ECM harness connector.
Reconnect the disconnected Wastegate Solenoid harness connector.
Turn the Ignition on, engine not running.
Disconnect the Wastegate Solenoid harness connector.
Connect an incandescent test light across the supply and driver pins at the Wastegate Solenoid harness connector.

NOTE: The ECM will perform a self check of the circuit after approximately 30 seconds, which should light the incandescent test light.


Does the light illuminate brightly after 30 seconds of being connected?
Yes
Refer to the INTERMITTENT CONDITION Symptom (Diagnostic Procedure).

No
Replace the ECM.
Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL).

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Keep us updates.

2003 Jeep Grand... | Answered on Oct 05, 2017


Steering pump belt loose or worn.

2003 Jeep Grand... | Answered on Sep 20, 2017


run the fault codes
servo/ solenoid. or sensor problems

2003 Jeep Grand... | Answered on Aug 21, 2017

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