Question about 1994 Dodge Ram

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Junit80....what does ecm stand for? where is it located at? and where is the shut off relay ( re-set) buttun located at?

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  • jd911 Jun 25, 2009

    does the key have to be on in the on position for the coil, alternator to have fire. where is the automatic relay ( switch - whatever its called) positioner located at?

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  • Dodge Master
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ECM= Electronic Control Module
Dodge does not use a reset button (own 3 of them),that is Ford.

Posted on Jun 25, 2009

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My 2013 dodge avenger wont start. Im getting a p0688 ECM/PCM code. What should I do


P0688 (generic) = ECM/PCM Power Relay Sense Circuit /Open
P0688 DODGE - Auto Shutdown Relay Control Circuit Low

Check all the ECM fuses, if the fuses are OK try replacing the ASD (Auto Shut Down) relay.

Read more: http://www.autocodes.com/p0688_dodge.html#ixzz405J7vpq8

Possible causes:

- Weak battery - Low voltage while cranking
- Faulty Engine Control Module (ECM) relay
- Blown ECM fuse
- Faulty ECM
- ECM harness is open or shorted
- ECM circuit poor electrical connection

Feb 13, 2016 | Dodge Cars & Trucks

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05 rendezvous, where is the fan sending unit located


Are you talking about the radiator cooling fans ? If so there is no fan sending unit as you call it ! The fans are controlled by the BCM/PCM !
The engine cooling fan system is controlled by the body control module (BCM) and the powertrain control module (PCM) or engine control module (ECM). The BCM performs the calculations as to how long, when and what speed the cooling fans should turn on. The BCM then sends a class 2 message to the PCM/ECM to engage the cooling fan relays. If there is a malfunction with the BCM, the PCM/ECM will control the engine cooling fans independently. The engine cooling system consists of 2 electrical cooling fans and 3 fan relays. The relays are arranged in a series/parallel configuration that allows the PCM/ECM to operate both fans together at low or high speeds. The cooling fans and fan relays receive battery positive voltage from the underhood accessory wiring junction block. The ground path is provided at G100.
The BCM and PCM/ECM command Low Speed Fans on under the following conditions:
?€¢
Engine coolant temperature exceeds approximately 106?°C (223?°F).


?€¢
A/C refrigerant pressure exceeds 1 310 kPa (190 psi).


?€¢
After the vehicle is shut off if the engine coolant temperature at key-off is greater than 140?°C (284?°F) and system voltage is more than 12 volts. The fans will stay on for approximately 3 minutes.

The BCM and PCM/ECM command High Speed Fans on under the following conditions:
?€¢
Engine coolant temperature reaches 110?°C (230?°F).


?€¢
A/C refrigerant pressure exceeds 1 655 kPa (240 psi).


?€¢
When certain DTCs set.

Aug 08, 2015 | Cars & Trucks

1 Answer

My Renault Espace Mk III radiator fans are not switching off, even if you disconect the temperature sensor. both relays are okay. Some say it's the aircon pressure switch. Anyone knows where is the...


turning of the ac switch will indicate if it is an ac problem for the fans.
some cars have the radiator fans running for up to 10 minutes after shut down . Run the fault codes to see if there is a faulty temperature sensor. how it works is this
the sensor is connected to the ecm and has power passing through. it When the sensor sensor a preset coolant temperature the power to the ECM is altered and so the ECM energizes the relays for the fans. If the fans are running continuously after shut down then the ECM still has the relays energized as it is still reading the requirement from the sensor.

Feb 07, 2015 | Renault Cars & Trucks

1 Answer

Ecm relay location


The engine control relay is located adjacent to the engine compartment relay and fuse box.

Aug 31, 2014 | 2001 Hyundai Accent

1 Answer

Where is the location of ecm circuit fuse (relay 109) in my 1998 audi a4 quattro 2.8 ltr


Get a service manual, it will help you locate it. Usually they are under the hood or behind the glove box.

Jul 20, 2014 | 1998 Audi A4

1 Answer

2005 nissan xterra shuts off while driving


Check the ECM relay. Nissan has a recall for that relay, for that year. You can swith the relay with your defogger relay which should be next to it. The relay box is located under the hood on the passenger side. Hope this helps. Here's a re call link.http://www.thenewx.org/forum/showthread.php?t=39850

Jul 06, 2014 | 2005 Nissan Xterra

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Po540 code


DTC P0540: Intake Air Heater - Incorrect Voltage

The Engine Control Module (ECM) uses an Intake Air Heater (IAH) to warm the incoming air for proper cylinder combustion. The ECM grounds the control coil of the IAH relay to energize the heater during cold weather operation. If the ECM detects voltage on the IAH circuit when the relay is commanded OFF, or incorrect voltage when the relay is commanded ON, this DTC will set.


There are several possible causes for this code including:

Faulty IAH Relay

Faulty IAH Relay Control Circuit

Faulty Line Voltage Reference Circuit

Faulty Heating Element

Faulty ECM

Feb 28, 2011 | 2003 Chevrolet Silverado 2500HD

1 Answer

2001 dodge truck wont start


dear friend:code p1601 stands for engine control module(ecm)transmission control unit(tcm)-serial peripheral comminication malfunction,code p1282 stands for fuel pump relay-open circuit,fuelpump relay faulty and p1687 stands for metering oil pump-high flow-circuit malfunction,(wiring metering oil pump switch metering oil pump and ecm

Sep 22, 2009 | Cars & Trucks

1 Answer

What does the ecm stand for? and where is it located at? where is the shut off relay buttun (re-set buttun) located at?


Hi,
What product is this. Seems to be a HP AiO Printer. Please advice
According to HP AiO printer's ECM stands for Error Correction Mode.

- Nikhil

Jun 25, 2009 | 1994 Dodge Ram

1 Answer

Electrical problem


could be one of the relays try to locate the ecm relay or fuel pump relay and swap it,

they also have a ground conector very close to the batteri most of time blak and green cables and they melt inside causing high resistance and poor conection

May 28, 2008 | 1998 Ford Contour

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