Question about 1999 Jeep Grand Cherokee

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2001 jeep grand cherokee no start, no cam signal or ASD control from pcm

I am working on a 2001 jeep grand cherokee with a 4.7 liter. The engine will not start, I know that the cam position sensor is not showing up on the pcm datta. I have tested the sensor and wiring to the pcm and its working. When the engine is cranking votage is fluctuating between 1 and 5 volts. I have no power to the injectors or the coils. The ASD relay is not sending power out because the pcm is not sending a ground signal to it. I have replaced the pcm and cam sensor and the signal wire. The skim key and vin have been programed in to the second used pcm. Still have the exact same problem, any suggestions??

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  • Anonymous Mar 17, 2014

    2003 Chrysler Voyager 2.4 liter



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Posted on May 15, 2009

  • williamhewle
    williamhewle Mar 30, 2012

    I need to change mine out of my 1999 jeep. where is it located?



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93 Jeep Grand Cherokee, no spark from ignition coil

so gue$$ stinks sure.... why do that.?
all it takes is a scan tool to find this.

first you need to learn ASD relay rules.
to start a jeep 1993 to NOW.
the ASD most close, cranking,does it?
and most stay closed cranking and NOT drop out in 3 seconds.
that means crank for 5 seconds and if the ASD drops. at 3.?
easy huh?
if it did DROP i can tell you the ECU will set DTC errors you failed to see because you did not scan it during those 5 seconds.

first is fuses.
lets make a list. works on all jeeps 93+
  1. battery changed. to 12.6vdc reseted.
  2. keyon, CEL lamp glows, if not fuse blown to PCM (ECU)
  3. engine cranks fast.
  4. Asd realy pulls in and holds.
  5. scan tool shows, what? BINGO. DTC errors, easy huh?
  6. ok no DTC, errors, live for 5 seconds, cranking,so lost spark? must be bad coil or wired wrong. (change it 1 wire at a time?ooops)
  7. coil dead, its not DTC caused, so if no DTC that means the PCM did not see Coil ignitor errors. to coil see? i bet its got TDC;s if not then i check the coil inputs. to be sure the PCM ignitor is firing the coil correctly with my scope, oops no scope.
  8. if no scope you get to buy a new PCM. Wild guessing bad ignitor.
  9. i use a Innova 3140 scan too that does 93-95 jeeps, for about $150 only about 1.5 hrs shop labor value. and is Investment grade tool, it would have saved you 3 parts, guessed already.

Mar 18, 2015 | 1993 Jeep Grand Cherokee

2 Answers

Getting no spark

which engine? of the 3.
all sparks failing or just one, takes them all to run !
generic answer, starts.
check fuses first. aways.
spark, lost spark on all modern cars
you next scan the PCM using any scan tool (modern)
youj crank the engine over for 5 seconds, and you will see
DTC errors. , and the error is a BIG clue.
like DTC for dead Crank sensor, or? cam?

Dec 26, 2014 | 2000 Jeep Grand Cherokee

2 Answers

Getting spark to the coil every now and then and the auto shut down relay shuts everything down. Will not turn over.

Great another ASD drop.
you meant it turns over great(but does not start)
all starters crank and turn over the engine. starting is another matter.
why you can not find this is for 2 reasons, no scan tool tops list
and ASD ops.
the scan tool (even a 9 buck one) works in USA cars 96, (all)
click ASD here. on this page.
it tells you all 8 ways for ASD to drop
and guess what, all ASD drops are reported by those 9 buck tools.

easy, once you have the 2 facts.

Nov 25, 2014 | 1996 Jeep Grand Cherokee

1 Answer

Have a 2004 jeep Cherokee that has a p1389 code in

gee 1, last year of Cherokee is 2001, so you meant Grand right??????
gee2, wont start or stalls, no other symptoms????? just 1 DTC, no others using a real scan tool? that be first huh?
Geewise 3, what engine, wow, wrong car, no engine or country.?

the FSM covers this, and the ASD has 8 ways to trip off line'
UP TO 8 ways , just like old wonder bread had.

answering for 2004 GC, (i actually look it up in the real book)
not google butchered DTCs.
P means power train, 1 means factory codes.
a 3 coin toss lands...
2004 GC, vin N, 4.7L v8 automatic,

it reads. verbatim.
Trouble Code: P1389
No Auto Shutdown Relay Output Voltage To PCM
Number of Trips to Set Code: 1
  • Catastrophicmonitor failure.
Trouble Code Conditions:
Engine cranking; and the PCM did not detect any voltage on the ASD Relay Output circuit to the PCM during the CCM test.
Possible Causes:
  1. ASD relay connector is damaged, loose or shorted
  2. ASD relay output circuit is open between the relay and PCM
  3. ASD relay power circuit is open (test power from Fused B+)
  4. ASD relay is damaged or has failed
  5. PCM has failed (nah)

it means, to me.
  • the relay is unplugged
  • or fuse blown "fused B+" (a top reason, world wide)
  • the relay is bad.

my buds ASD page,

Oct 20, 2014 | Jeep Cherokee Cars & Trucks

1 Answer

What is an asd relay

Hi there:
Jeep uses and engine management system that is built by Chrysler. The ASD relay (Automatic ShutDown relay) is controlled by the PCM (Powetrain Control Module). The PCM needs to see a CKP signal (Crankshaft Position Sensor) and CMP (Camshaft Position Sensor) signal in the proper sync before the ASD relay will be turned on by the PCM.

I would suggest you take your vehicle to an experienced Chrysler technician for diagnosis.

HERE is a description of an ASD setup that may help.

Good luck.

Mar 05, 2013 | 1998 Jeep Grand Cherokee

1 Answer

Change the crank sensor the cam sensor and the pcm and the 2001 jeep grand cherokee still is having an issue staying started and the gauges going crazy as well as the windows not working

I cant explain the windows but the stalling can be the wiring harness at the under the hood . you did not mention engine size but i know on in line 6 the harness goes around the rear of valve cover if you move it around it will stall if bad.

Jan 09, 2013 | 2001 Jeep Grand Cherokee

1 Answer

2001 jeep Cherokee sport runs for a while and stops for 24 hours starting again like nothing hapenned

The engine and automatic transmission in this vehicles drive train are fully electronically controlled by a computer called the PCM and TCM (Power Train Control Module, Transmission Control Module). When a problem like this or other drive-ability related problems occurs the computer stores a record of the problem (there are of course some exceptions to this, like the fuel pump, engine coolant temperature sensor and MAF sensor for instance) in the form of a fault code in its memory, to read these fault codes you must have the systems memory scanned with a special tool. Once the fault code(s) are read you then must perform the appropriate diagnostic testing to find and resolve the problem(s) DO NOT REPLACE ANY PARTS UNTIL A TRAINED TECHNICAIN HAS DIAGNOSED THE PROBLEM TO AVOID SPENDING YOUR HARD EARNED MONEY ON PARTS THAT MAY NOT CORRECT THE PROBLEM

Apr 28, 2012 | 2001 Jeep Cherokee

1 Answer

Im not getting fire on my 2001 jeep cherokee. coil rail is good and the cam position sensor is new and still no fire. im getting fuel but i think there is no fire. any idea as to what im overlooking? jeep...

If no spark at the plugs, engine cranking, did you check primary voltage at the coil assemble, dark green wire with orange tracer, engine cranking, use a test lite on the wire check for voltage. If no voltage that will lead back to asd relay. There are some fuses involved. I believe the computer has to see both the cam and crank sensor signals or it won't ground the asd relay. All I can do is make testing suggesting.
cherokee asd relay-m5cnn2lotweryjtsi2x53sss-2-0.jpg

Mar 10, 2017 | 2001 Jeep Cherokee

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