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Unread 10-12-2012, 12:45 PM   #16
Apachebear
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2002 KJ Liberty 
 
Join Date: Oct 2012
Location: Reno, NV
Posts: 11
Question..

Billwill, if the PCM is not working properly would it cause this problem?

streetglideok, yes we had a low battery then bought the wrong one. Now we have the correct one and new.

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Unread 10-13-2012, 01:13 AM   #17
Billwill
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Quote:
Originally Posted by Apachebear View Post
Billwill, if the PCM is not working properly would it cause this problem?

streetglideok, yes we had a low battery then bought the wrong one. Now we have the correct one and new.

The PCM has absolutely nothing to do with the voltage coming in and going out of the ignition switch when the engine is not running.

With the ignition switch pulled off of the actuator pin and resting in your hand, you should be able to measure the voltages on the input and output pins as you rotate the switch to a new position with a flat screwdriver.

The pin numbers are marked and the wire colors are there:

RD = Red
DB = Dark Blue
PK/BK = Pink with Black stripe
YL = Yellow
RD/DB = Red with Dark Blue stripe
TN = Tan
BK/OR = Black with Orange stripe

The BK/LB ie Black with Light Blue stripe on pin 10 of the switch is a contact that makes when the ignition key is inserted...this causes the "Bing" when you open the door while the key is still in the ignition.
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Unread 11-18-2012, 03:35 PM   #18
Apachebear
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Just an update. Gave up for awhile. We are broke. The Jeep is just sitting in the lot collecting tumble weeds.
Refresher of what was done: New proper sized and group battery. New ignition switch. New actuator pin. All fuses checked. All cables checked. Getting power when key in on position, then when turned to start position all goes dead (except the battery). I was thinking that the next step would be to check the starter solenoid and starter.
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Unread 11-19-2012, 04:26 AM   #19
Billwill
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Quote:
Originally Posted by Apachebear View Post
Just an update. Gave up for awhile. We are broke. The Jeep is just sitting in the lot collecting tumble weeds.
Refresher of what was done: New proper sized and group battery. New ignition switch. New actuator pin. All fuses checked. All cables checked. Getting power when key in on position, then when turned to start position all goes dead (except the battery). I was thinking that the next step would be to check the starter solenoid and starter.
Jumper pins 30 and 87 in the starter relay slot....engine should turn over.
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Unread 11-19-2012, 07:40 PM   #20
Apachebear
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Jumper?

Willing to try this. Can you explain what you mean by a jumper (wire)? Is that going from the starter relay on the starter...or are you pulling the starter relay out of the power distribution box?

Thanks so much,

Bear
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Unread 11-20-2012, 03:29 AM   #21
Billwill
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Quote:
Originally Posted by Apachebear View Post
Willing to try this. Can you explain what you mean by a jumper (wire)? Is that going from the starter relay on the starter...or are you pulling the starter relay out of the power distribution box?

Thanks so much,

Bear
Pull out the starter relay and with ignition ON jumper pins 87 and 30 in the exposed relay socket with a short piece of wire. Engine should turn over but probably will not fire...needs ASD relay to be energized for that to happen.
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Unread 12-19-2012, 03:44 PM   #22
Apachebear
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Okay, finally tried that

Sorry for late response. Wife & I are disabled.
Tried that. No response at all. Gonna buy a new starter and put it in. Who knows, might work.

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Unread 03-17-2013, 07:07 PM   #23
Apachebear
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Took Starter out. Took it down to Autozone. It was bad. Bought new one. Put it in. WOW, was that ever a fun job to do. Had to disconnect drive shaft and exhaust pipe. Bolt on the clamp that hooks onto the exhaust pipe manifold broke. Bought new clamp at Jeep Dealer. Finally got the sucker on. Also torqued it correctly to 8mm bolts of 22 lbs (feet) each.
Put key in and dashlights came on; but now nothing won't start.
Thinking again about replacing the PCM?
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Unread 03-18-2013, 01:41 AM   #24
Billwill
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Quote:
Originally Posted by Apachebear View Post
Took Starter out. Took it down to Autozone. It was bad. Bought new one. Put it in. WOW, was that ever a fun job to do. Had to disconnect drive shaft and exhaust pipe. Bolt on the clamp that hooks onto the exhaust pipe manifold broke. Bought new clamp at Jeep Dealer. Finally got the sucker on. Also torqued it correctly to 8mm bolts of 22 lbs (feet) each.
Put key in and dashlights came on; but now nothing won't start.
Thinking again about replacing the PCM?

PCM is the last thing you need to do!

What is it doing?
Does it turn over but not catch?
If it catches what does it do next?
Did you replace starter motor complete with solenoid?

If it does not turn over try removing the Starter Relay and jumper pins 87 and 30...engine should turn over provided fuse 8 (40 A) under the hood is OK and the ground strap grounding the engine to the chassis is clean and tight...battery cables must also be clean and tight and negative lead going to chassis must be clean and tight.

If this jumpering does turn over the engine then swap over Starter Relay and make sure fuse 28 (15 A) under the hood is OK and the Transmission is in Park and the Transfer case is in N. If the engine now does not turn over then jumper the Black/White wire going to the Starter Relay pin 85 to ground somewhere and see if it turns over.

If the engine does turn over but does not start then check if the Auto Shut Down (ASD) relay under the hood is energizing. If not then check fuse 15 (10 A) inside the cabin.

Does your Jeep have the SKIS immobilisor system instaled? If it does have this feature then an amber key symbol with a stripe going through it should briefly light on the cluster when the ignition is turned ON.....you want this light to go out very soon and must not flash at you or stay ON.

That is enough for you to check for now.
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