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Cant start 4hl1 engine, crank but not start.., what is the problem ecm or fuse

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  • Cars & Trucks Master
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Could be either but I would be looking at cam/crank position sensors , immobiliser operation
I would run the fault codes to check for failed sensors.

Posted on Jul 07, 2015

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Posted on Jan 02, 2017

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SOURCE: S-10 Cranks but won`t start jumpacross ECM battery

how about fuse..is it bad?

Posted on Oct 08, 2009

  • 58 Answers

SOURCE: ECM BATT fuse keeps blowing

That fuse provides power for the fuel pump. Either your fuel pump is blowing the fuse or there is a shorted wire.

Posted on Dec 21, 2008

  • 117 Answers

SOURCE: 1988 C2500 engine stalled, cranks

Remember that the relay only will send power to the fuel pump for only 3-5 seconds after the key is turned on. You will need someone in the cab cranking the engine over while you test the circuit to the pump. Make sure you are testing the correct wire. If the engine will start with starting fluid, then there is a fuel delivery problem. Connect a fuel pressure guage to the fuel rail. If you have the required pressure, then you may have a computer that is not grounding the injectors. If you have no fuel pressure, you may have a inoperative fuel pump or a clogged fuel filter.

DT

Posted on Sep 18, 2010

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Need the wiring diagram for 2005 Chevy trailblazer underhood fuse block, starting circuit.


Do you know if it is ECM/PCM or BCM controlled ?
Circuit Description (ECM/PCM Controlled)
Moving the ignition switch to the START position sends a 12-volt signal to the engine control module (ECM)/powertrain control module (PCM) Crank Request circuit. The ECM/PCM verifies that the transmission is in the PARK or NEUTRAL position. With the transmission in Park, voltage flows through the Park/Neutral position switch and feeds the starter relay coil. The PCM then grounds the control circuit of the starter relay. When the starter relay is energized it allows battery positive voltage to the starter solenoid S terminal. On some vehicles the starter will continue to crank the engine with the key released until it starts or the crank command has timed out to prevent excessive heat build up in the starter circuitry or the ECM/PCM receives an engine run flag.
Circuit Description (BCM Controlled)
Moving the ignition to the START position signals the body control module (BCM) that engine crank has been requested. The BCM verifies that theft is not active and sends a serial data message to the powertrain control module (PCM) requesting engine start. The BCM also energizes the RUN/CRANK RELAY. When the RUN/CRANK RELAY switch side closes, and the vehicle is in Park or Neutral or with the clutch is fully depressed, if equipped, supplies voltage to the starter relay coil. The PCM verifies the transmission is in Park or Neutral and the clutch is fully depressed, if equipped. The PCM will then ground the control circuit of the starter relay, closing the switch supplying voltage to the starter solenoid. On some vehicles the starter will continue to crank the engine with the key released until it starts of the crank command has timed out to prevent excessive heat build up in the starter circuitry or the PCM receives an engine run flag.

Free wiring diagrams here
http://www.bbbind.com/free_tsb.html Enter vehicle info. year , make , model and engine size . Under system click on engine ,then under subsystem click on starting . Click the search button ,then click the blue link .
If you look at the diagram you will see the ignition switch ,when in start it sends B+ voltage to the ECM/PCM or depending on which system or engine to the BCM . When it see's this input it will energize the starter relay located in the under hood fuse box. This happens if the control module in charge see's another input from the PNP- park neutral position sensor and if no anti-theft system problems .
Good luck !

Sep 30, 2017 | Cars & Trucks

1 Answer

WHY DOES MY ISUZU 4HL1 ENGINE HAVE A HARD START ALWAYS?


no car stated, huge NPR truck no less.
no year stated
so no free book information on that engine,.
big diesel. 4HL1, no dash letter?
compression at spec.?
glow plugs work.,
filters clean. water in fuel,
does test fuel (spray'd) help? ???
injection problems
lack of startup air.(filter)


The 4HL1 is a common rail direct injection OHC 16V high-pressure fuel injection system diesel engine of 4.777 L capacity with electronic control system. Peak torque is 333 Nm, peak power is 140 PS (103 kW) at 3,000 rpm. Maximum torque is (34.0 kg m)'/1,500 rpm. Bore is 115 mm, stroke is 115 mm.
The 4HL1-N is a common rail direct injection OHC 16V high-pressure fuel injection system diesel engine of 4.777 L capacity with electronic control system. Peak torque is 333 Nm, peak power is 131 PS (96 kW) at 3,000 rpm. Maximum Torque is (34.0 kg m)'/1,500 rpm. Bore is 115 mm, stroke is 115 mm.
The 4HL1-TC is a common rail direct injection OHC 16 V turbocharged and intercooled high-pressure fuel injection system engine of 4.777 L capacity with electronic control system. Peak torque is 425 Nm, peak power is 160 PS (118 kW) at 2,700 rpm. Maximum torque is (43.3 kg m)'/1,500 rpm. Bore is 115 mm, stroke is 115 mm.
The 4HL1-TCS is a common rail direct injection OHC 16 V turbocharged and intercooled high-pressure fuel injection system diesel engine of 4.777 L capacity with electronic control system. Peak torque is 500 Nm, peak power is 179 PS (132 kW) at 2,700 rpm. Maximum torque is (51.0 kg m)'/1,500 rpm. Bore is 115 mm, stroke is 115 mm.

May 31, 2016 | Isuzu Cars & Trucks

1 Answer

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

1 Answer

Where is the ECM fuse and Fuel pump relay on a 2000 Hyundai Tiberon?


images for Where is the ECM fuse and Fuel pump ..

ECU fuse keeps blowing - New Tiburon Forum : Hyundai Tiburon ...

www.newtiburon.com/.../tiburon.../217243-ecu-fuse-keeps-blowing.html

Sep 8, 2012 - 18 posts - ‎8 authors
Edit: Instead, pull the fuel pump relay, and see if the fuse still blows when ... ControlRelay, Fuel Pump relay, A/T control relay, Generator, ECM ... Official "Check Engine Light" Thread - New Tiburon Forum ...
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Apr 26, 2013
Starting problem. Fuel pump doesn't prime with key on.
Mar 9, 2013
Fuel pump not starting intermittently
Oct 6, 2010
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Car Cranks But Will Not Start - Hyundai Forums : Hyundai Forum

www.hyundai-forums.com/...2000.../85246-car-cranks-but-will-not-start...

Jan 17, 2008 - 10 posts - ‎6 authors

Jan 06, 2016 | Hyundai Cars & Trucks

1 Answer

Chevy code P1682?


P1682 Chevrolet - Ignition 1 Switch Circuit 2

Possible causes
- Faulty ignition switch
- Ignition Switch harness is open or shorted
- Ignition Switch circuit poor electrical connection
- Faulty Engine Control Module (ECM)
What does this mean? What does this mean?
When is the code detected?
The ECM has detected a voltage deifference between two circuits
Possible symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
- Possible no crank or start
P1682 Chevrolet Description

There are 2 ignition 1 voltage circuits supplied to the Engine Control Module (ECM). The first ignition circuit is provided by the powertrain relay, through a fuse. This ignition 1 voltage circuit supplies power to all the internal ECM circuits associated with the throttle actuator control (TAC) operation. The second ignition 1 voltage circuit is supplied by the run/crank relay through a fuse, and is used to power the remaining internal ECM circuits. If the ECM detects a voltage difference between the 2 ignition 1 voltage circuits, DTC P1682 will set

Read more: http://engine-codes.com/p1682_chevrolet.html#ixzz3dr4CYBUT

Jun 22, 2015 | Cars & Trucks

1 Answer

How do i fix a code po688? 2004 pacifica, no crank, no start, dash lights are on with key on the on position


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

Jan 20, 2015 | 2004 Chrysler Pacifica

1 Answer

Am having trouble with my chevolet colorado 3.7 lt


Possible causes
- Faulty ignition switch
- Ignition Switch harness is open or shorted
- Ignition Switch circuit poor electrical connection
- Faulty Engine Control Module (ECM)
help.jpg What does this mean?
When is the code detected?
The ECM has detected a voltage deifference between two circuits
Possible symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
- Possible no crank or start
P1682 Chevrolet Description
There are 2 ignition 1 voltage circuits supplied to the Engine Control Module (ECM). The first ignition circuit is provided by the powertrain relay, through a fuse. This ignition 1 voltage circuit supplies power to all the internal ECM circuits associated with the throttle actuator control (TAC) operation. The second ignition 1 voltage circuit is supplied by the run/crank relay through a fuse, and is used to power the remaining internal ECM circuits. If the ECM detects a voltage difference between the 2 ignition 1 voltage circuits, DTC P1682 will set.


Read more: http://engine-codes.com/p1682_chevrolet.html#ixzz3Djm8K11C

Sep 19, 2014 | Cars & Trucks

1 Answer

Corvette Troubleshooting .My c6 wont start. I get in with the key fob and all the light on dash light up like its ready to go and when I hit the start button everything on the dash just shuts down for...


Do you know anything about automotive electronic's ,serial data communication's between control module's ?
Circuit Description
When the ignition mode switch is placed in the START position, a discrete input is sent to the body control module (BCM) notifying it that engine start has been requested. The BCM then verifies that the brake pedal has been depressed with a discrete input from the brake pedal position sensor and that the key fob, with the correct code, is in the vehicle. After this information has been verified the BCM grounds the control side of the RUN/CRANK relay closing the switch side of it and allowing battery positive voltage to flow from the BATT 3 fuse through the RUN/CRANK relay switch, engine control module (ECM) fuse to the battery positive voltage side of the CRANK relay coil. The BCM also sends a high speed GMLAN message to the ECM requesting engine start. The ECM will then verify that the internal mode switch (IMS) is in Park / Neutral or the clutch pedal is fully depressed. After this has been verified the ECM then supplies 12 volts to the control circuit of the CRANK relay closing the CRANK relay switch circuit and allowing battery positive voltage to flow through the STARTER fuse, the CRANK relay switch to the S-terminal of the starter solenoid cranking the engine. Ground is supplied through the engine block.

Nov 16, 2017 | Cars & Trucks

1 Answer

Where is the fuse for the ecm located on a chevy 2005 Classic


I have never seen a fuse for an ECM but if there was one it would show you the location in the owners manual.....Did you check the fuse panel for one ? Check for power block under the hood You cant go wrong looking at the owners manual....look in the index for fuse or fuse's ..What kind of problems are you having with it ? What size engine is in it ?
Will it not crank ? ........................................Metalpoet

Mar 05, 2011 | 2005 Chevrolet Malibu

1 Answer

I have a lhs 1996 Chrysler. The car wont start and the engine fuze burns out.


I also have a 96 LHS that randomly blows the 20 amp ECM fuse. If this is what you are referring to, the problem may be in one of your ECM sensors. 1-Start by unplugging all ECM sensors (Temp, Cam, Crank, 2-O2, TPS, etc.) and replace the fuse. 2-Crank the starter (the car will not start) and see if the fuse blows. If it does you probably have an electrical problem with the ECM. 2-If the fuse does not blow, plug in only the cam sensor and start the car; it will idle rough and the check engine light will come on. If the fuse blows, the problem is the cam sensor or wiring to it. 3-Continue plugging in sensors one at a time and try starting. When the fuse blows, you will know which sensor and/or wiring to the sensor to check. This process of elimination has worked twice for me.

May 16, 2010 | Cars & Trucks

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