Question about 1991 Chrysler LeBaron

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1991 Chrysler Lebaron won't start. ASD relay does not operate. If operated manually fuel pump OK and 12V to coil OK.

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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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SOURCE: My 1998 dodge ram 2500 will not start. I believe

pound on gas tank an see if it runs if so replace fuel pump

Posted on Mar 06, 2009

  • 1 Answer

SOURCE: Lebaron won't start

I had a similar problem with my 90 LeBaron. It turned out to be the computer.

Posted on Mar 08, 2009

  • 2 Answers

SOURCE: Fuel pump relay location in the relay box

when you open the fuse panel under the hood it should be on the drivers side and the third one then there is a empty space for a relay then more relays

Posted on Jun 30, 2009

  • 142 Answers

SOURCE: 1991 dodge ram 150 asd relay location

There are 4 relays mounted on Drivers side fender under hood. Near hood hinge area. Counting from the front it should be the second relay. They are not always installed in the correct order. It should also be the smaller relay in size.

Posted on Oct 25, 2009

  • 338 Answers

SOURCE: swapped a 1999 420A engine

first the cam sensor shouldn't be upside down from the 95. they both should be with the plug facing down. they 95 CAS has a different plug than the 99 CAS.
the 95 has round pins and the 99 has flat pins.

also the 95-96 relays are opposite the 97-99

besides that it could be the ecu. i also have heard of the locating pin on the intake cam shearing off, allowing the gear to turn with the timing belt without the actual camshaft spinning.

Posted on Sep 27, 2010

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2 Answers

How to get the fuel pump to start working

which engine, Nat.? 2.5L or 4.0L? in the XJ/MJ pickup.
1986 is the first, AMC EFI, used, in Jeeps.
this is the RENIX system (French, EFI injection)
sorry, no ASD then, not until 1991 .with real Chrysler EFI.
the ECU powers the fuel pump relay directly.
if the ECU has power, it will energize this relay, does it?

4.0L here.86-88 (same is true up to 1991)
25921628-jy55te25vvk1g12vmyxwai2y-5-0.jpgthe ASD was introduced on the 1991 Wrangler but only 4L
the XJ/MJ same year but to both engines, 2.5 and 4L
both have ASD in 1991,
The MJ Comanche Pickup is a XJ cut down at the rear. and has same unibody base.
The engine book for XJ/MJ are the same blue book.

Oct 23, 2015 | 1986 Jeep Comanche

1 Answer

Auto shut down fuse blows when I start the truck?

This information is straight out of the 1997 Breeze/Stratus/Cirrus Factory Service Manual (Yes I paid the $90 for it years ago)

__________________________________________________ _______________

Automatic Shutdown (ASD) sense - PCM Input

The ASD sense circuit informs the PCM when the ASD relay energizes. A 12 volt signal at this input indicated to the PCM that the ASD has been activated. This input is used only to sense that the ASD relay is energized.
When energized, the ASD relay supplies battery voltage to the fuel injectors, ignition coils, and the heating element in each oxygen sensor. If the PCM does not receive 12 volts from this input after grounding the ASD reley, it sets a Diagnostic Trouble Code (DTC).

Automatic Shutdown Relay - PCM Output

The PCM operates the Automatic Shutdown (ASD) relay and fuel pump relay through one ground path. The PCM operates them by switching the ground path for the solenoid side of the realys on and off. Both realys turn on and off at the same time.
The ASD relay connects battery voltage to the fuel injectors and ignition coil. The fuel pump relay connects battery voltage to the fuel pump.
A buss bar in the power distribution center (PDC) supplies voltage to the solenoid side and contact side of the relay. The ASD relay power circuit contains a 20 amp fuse between the buss bar in the PDC and teh relay. The fuse also protects the power circuit for the fuel pump relay and pump. The fuse is located in teh PDC.
The PCM controls the relay by switching the ground path for the solenoid side of the relay on and off. The PCM turns the ground path off when the ignition switch is in the Off position. When the ignition switch is in the On or Crank position, the PCM monitors the crankshaft position sensor and the camshaft position sensor signals to determine engine speed and ignition timing (coil dwell). If the PCM does not receive the crankshaft position sensor and camshaft position when the ignition switch is in teh Run position, it will de-energize teh ASD relay.
The ASD relay and fuel pump relay are located in the PDC near the battery. The inside top of the PCD cover has a label showing relay and fuse location.

ASD and Fuel Pump Relays

The following description of operation and tests apply only to the Automatic Shutdown (ASD) and fuel pump relays. The terminals on the bottom of each relay are numbered.

' __85 ___________'
' __87A '87 '30 ___' Sorry for the crudeness of this. This is supposed to
' __86 ___________' be the relay terminals!

- Terminal number 30 is connected to battery voltage. For both the ASD and fuel pump relays, terminal 30 is connected to battery voltage at all times.
- The PCM grounds the coil side of the relay through terminal number 85.
- Terminal number 86 supplies voltage to the coil side of the relay.
- When the PCM de-energizes the ASD and fuel pump relays, terminal number 87A connects to terminal 30. This is the Off position. In the off position, voltage is not supplied to the rest of the circuit. Terminal 87A is the center terminal on the relay.
- When the PCM energizes the ASD and fuel pump relays, terminal 87 connects to terminal 30. This is the On position. Terminal 87 supplies voltage to the rest of the curcuit.

The following procedure applies to the ASD and fuel pump relays.
(1) Remove relay from connector before testing.
(2) With the relay removed from the vehicle, use an ohmmeter to check the resistance between terminals 85 and 86. The resistance shoud be 75±5 ohms.
(3) Connect the ohmmeter between terminals 30 and 87A. The ohmmeter should show continuity between terminals 30 and 87A.
(4) Connect the ohmmeter between between terminals 87 and 30. The ohmmeter should not show continuity at this time.
(5) Connect one end of a jumper wire (16 guage or smaller) to relay terminal 85. Connect the other end of the jumper wire to the ground side of a 12 volt power source.
(6) Connect on end of another jumper wire (16 guage or smaller) to the power side of the 12 volt power source. Do not attach the other end of the jumper wire to the relay at this time.


(7) Attach the other end of the jumper wire to relay terminal 86. This activates the relay. The ohmmeter should now show continuity between relay terminals 87 and 30. The ohmmeter should not show continuity between relay terminals 87A and 30.
(8) Disconnect jumper wires.
(9) Replace the relay if it did not pass the continuity and resistance tests. If the relay passed the tests, is operates properly. Check the remainder of the ASD and fuel pump curcuits.

__________________________________________________ _______________

I know you said you replaced the relay, and this is a test procedure for the relay, but I have bought bad parts in the past. The description before the test procedure at least gives you an idea of what components are wired through and controlled by the relay. One of those may be faulty. Email me if you want or need wiring diagrams and I should be able to scan them and email them to you.

Jul 15, 2015 | 1992 Dodge Dakota

1 Answer

1999 Playmouth 4 cylinder will start after several tries. have new fuel pump, fuel filter, spark plugs and wires, checked ignition coil pack and connections and ASD and fuel pump relays. Everything checks...

I see you replaced the fuel pump , spark plugs an wires , fuel fliter an checked ignition coil pack , Connections ,ASD relay . And everything checks OK ?????? How did you check these thing's ? Testing electrical circuits with a DVOM - digital volt ohm meter ? Fuel pressure testing the fuel pump before replacing ? Does the vehicle have spark ? How about hooking up a scan tool that can view engine sensor data .A bad coolant temp sensor could cause hard starting. Did you check the dark blue with yellow trace wire at the PCM connector 2 pin 67 . This is the PCM control side of the ASD relay . Do you know how a relay works ? how to test at the relay base ? where in plugs into.
How to test computer transistor driver without scan tool

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Jun 01, 2017 | Plymouth Neon Cars & Trucks

1 Answer

1987 Chrysler lebaron won't start. I pulled the

Coupe, sedan, convertible, wagon, engine size? Also, do not use dielectric grease in computer connectors as this can cause a feedback issue transmitterd by the grease. Use white lithium only.

Aug 21, 2013 | Cars & Trucks

1 Answer

What is pcm asd circuit

PCM is powertrain control module. ASD is automatic shutdown. The PCM operates the Automatic Shutdown relay and fuel pump relay. The ASD relay supplies power to the fuel injectors and ignition coil. The fuel pump relay connects power to the fuel pump.

Oct 07, 2012 | 2004 Dodge Stratus

1 Answer

How to test the engine control module in a 1993 chrysler lebaron

You mentioned the relays, this is leading me to think it is a wiring, voltage, ground issue, or pump problem. These are usually pretty simple fixes if you can use a multi meter.
Check voltage at the pump with ignition switch turned on, should have 12 volts at pump. Yes ? Pump won't go? Remove pump and I hook it up directly to 12v. Be careful of battery spark and gas!!! Pump still won't go? Need a pump... pump goes??? Check ground, then work back to fuel relays. If you had voltage at pump relays are ok unless you got a bad one or something weird. Is there a inertia switch or fuel cut off? How's your filter? Did you check for fuel pressure at fuel rail? I have rarely seen a brain box fail in this area. And usually it doesn't effect the relays first, it just causes failure not relays issues. If relays are failing and you have correct voltage(12volts), check grounds are clean and good connections. Checked the fuses already correct? We should have started here. Check these things and if no progress give me any more info that would help and we can figure something out

Oct 22, 2017 | 1993 Chrysler Lebaron

1 Answer

Asd relay not operating

The ASD is what powers the fuel pump relay you need to check the engine fuse box junction for open fuse especially the fuel pump fuse and the ignition fuse. Get the ASD power corrected and the fuel pump injectors coil and reference will be back in action,check the fuse especially fuse No.23

Mar 26, 2012 | 2002 Jeep Wrangler

1 Answer

1989 Chrysler Lebaron 2.5 Turbo Running slugglish

check if you have a spark when engine dies. if not, check the rpm sensor or ignition coil. both have the simptoms like you describe.


Oct 08, 2009 | 1989 Chrysler LeBaron

1 Answer

1991 Chrysler lebaron Won't start

lebaron you should have manuals for scenarios like these. i'm in so much advantage because of having manual when my car broke down in the middle of the night

Oct 26, 2017 | 1991 Chrysler LeBaron

1 Answer

Lebaron won't start

I had a similar problem with my 90 LeBaron. It turned out to be the computer.

Dec 29, 2008 | 1992 Chrysler Lebaron

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