Question about Toyota 4Runner

Open Question

Starter relay my daughters battery moved on a turn and grounded itself to the positive post for 12 hours initially the engine cranked while making a rattling noise, a mechanic looked at it and explained the car is no good. well now there is no crank and I think his diagnoses is wrong. I checked and replaced all the blown fuses changed relays but the relay described as the HEAD (relay Toyota 90987-02006 056700-6912 12v Denso)in the engine compartment now rattles when battery is connected HELP Martin 773-419-1427

Posted by Anonymous on

Ad

6 Suggested Answers

6ya6ya
  • 2 Answers

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

Hi,
A 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
The service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Good luck!

Posted on Jan 02, 2017

Ad

SOURCE: 2003 Caravan No Crank, 3.3L

This is a bad PCM. Try to disconnect the security system first and if it still does not start then it is the PCM.

Posted on Aug 11, 2008

Ad
justuscc
  • 360 Answers

SOURCE: car will just turn over

main relay contacts get burned up...... common on the hondas its under the drivers side dash

Posted on Oct 10, 2008

  • 14036 Answers

SOURCE: my buick regal doesnt send signal from pcm to crank relay.

check pcm with a scanner to see if crank and cam sensor are working.

Posted on Apr 17, 2009

polarcycle
  • 1392 Answers

SOURCE: Won't crank, relay good.

Fuse would be in the outside fuse box. Look for the one labeled starter. If you are not getting power to the starter, could be an ignition switch.

Posted on May 29, 2009

motor1258
  • 6674 Answers

SOURCE: Describe your 2002 Chrysler Town &

Safety neutral switch o.k.? Tried moving shifter through all gears while holding key in start position?

Posted on Aug 03, 2009

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

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

2002 chevy trailblazer and it will not crank or start and the key has gotten stuck in the ignition. I also got a jumpstart and it still didn't start. What is wrong, Please?


Could be a number of thing's , can you do automotive electrical testing ? Do you know if starting is PCM / ECM controlled or BCM controlled ? Do you know what these are ? BCM - body control module , PCM/ECM - engine computer !
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.
Do you know what a park neutral safety switch is ? What do you mean key stuck in ignition ? Can't turn the key to off position , or you can an the key will not come out ?
Your best bet , take it to a qualified repair shop .

Apr 04, 2017 | 2002 Chevrolet TrailBlazer

1 Answer

I have replaced the starter relay and still have the same problem.


it could be a bad wire or connection to or from the relay ,or it could be a ground strap has rotted away. or it could be the starter itself not engaging when it recieve the signal to do so.. these things can be checked with the use of a voltmeter and a ohmmeter to check where the issue might be. (just get a cheap little multimeter if you dont already have. they are always useful)

this might be easier if you have a friend to help you.
first go over and look at all the ground straps (the woven metal straps or wires connecting the engine block to the chassis.. and the one between the negative battery terminal and chassis for corrosion damage or corroded connections. you can also check this by using a ohmmeter and measuring the resistance between the outside of the starter (you can probe any metal parts on the engine block. but doing it at the starter will reduce the chance for incorrect results) . and the negative battery connection. there should be a very low resistance.
next you will need to use a voltmeter. connect the positive probe to the big terminal with the big cable on the starter. make sure not to short anything. and the other probe to ground. here it should always be almost the same voltage as the battery is (battery voltage varies a little, but around 12 v).check that the car is in park or neutral. handbrake should be on. then try cranking a few times until it fails to crank.. check to see if it has voltage (here is where a friend is helpful) if thats ok. then we move the positive probe to the small terminal on the starter . this terminal is where the starter gets its signal from the relay to engage and start cranking the engine. have a friend either turn the key or check to see if the voltmeter say 12v while its failing to crank.
if it has 12 v but not engaging and cranking. then the issue lies with the starter unit itself. this is the most likely point of failure

if it does not have 12 v at the small terminal of the starter you should probe to see if one the legs of the relay has 12 v.all the time. , just remove the relay to probe the contacts beneath.

by looking at the relay you should be able to find out what leg is normally open (NO) . use the ohmmeter and connect from this leg to the small terminal on the starter (if you are unsure of what you are doing here it is reccomended to have a multimeter at voltage measuring to avoid damaging the multimeter by connecting it to the wrong connection. it will not survive it if you send 12 volt through the ohmmeter. and the voltage measuring will not allow enough current to accidentally make the starter crank) this wire should have a very low resistance.. if it does not. the wire or a connection has failed at either the starter end. or the relay end

good luck with the repairs :)

Oct 25, 2016 | 2001 Lincoln LS

1 Answer

I have a new battery for my car and it will not start crank just click.The car has very low mileage.


Without amp rating on charger let's move on to other items to look at.
Are the connections to battery tight and clean. Make sure you have cleaned both posts. Make sure there is no corrosion on cable ends. Also look at the wire that runs to ground , insure that is clean as well. Reconnect battery!
Turn off all accessories (radio, heater, A/C). When you open doors does the dome light turn on.
Does the dome light dim as you crank / click.
Can the car be jump started? If yes then I would lean to a weak battery. Without test equipment ( voltmeter) tough to varify.
You didn't explain why you replaced battery, but a purchased battery usually will normally be enough.
Make sure the battery size (amp hours) is rated for your engine size.
make sure wires to your starter are also corrosion free. A bad ground won't allow enough current flow giving you the click no crank.
try turning the key on off rapidly thus making starter move slightly and if it starts you are probably in need of new starter. The starter relay is easy to replace and cheaper so you can start there.

Sep 23, 2016 | 2003 Pontiac Grand Prix

1 Answer

Car wont start have replaced starter motor and relay and igniyion switch still wont start


What is year--make--model?
Make sure battery has a full charge and battery connections are all good. If your saying starter motor won't crank, check voltage and ground at the starter motor. Usually two voltage circuits at the starter, one comes from the battery, hot all the time. The other circuit goes hot with key in the crank position and in your case, I suppose wired through the starter relay. The relay has two circuits, the load side and control side of relay. The control side of relay needs voltage and ground to energize the relay. The load side of relay, in a diagram shows a line with arrowhead, when relay is energized, that arrowhead line moves to other terminal and that circuit carries voltage to starter. The voltage for load side of relay is usually hot all the time. I can't rule out neutral or clutch switch. The starter motor usually grounds through the engine block. If all voltage and ground circuit for the starter are good, I'd have to make sure the engine isn't seized.
Any testing at the starter, make sure tranny is in park or neutral and functional parking brake is set.

Mar 06, 2016 | Cars & Trucks

1 Answer

Why won't my 2004 Honda CRV Crank it has plenty of volts and everything (headlights, dome lights)is bright?


You have a dirty or loose connection either between the battery's negative post and engine ground (most likely) or between the battery's positive post and the starter solenoid. You can determine which by setting your meter to "DCV" or "DC Volts" and putting one probe on the battery's negative post (the lead POST, not the clamp) and the other probe on the alternator's body. Try to crank the engine that way - your meter SHOULD insist on reading 0.0V, but if you have a poor ground connection it may read as high as 12V.

Likewise, read volts between the battery's positive POST and the positive connection to the starter solenoid while someone tries to crank the engine. Again, it should read 0.0 but if you have a poor connection it'll read significant voltage.

Aug 04, 2014 | 2004 Honda CR-V

1 Answer

2004 Envoy XUV doesn't always crank.


I want to see if i catch your drift ! When you turn the key in the ignition switch to start , nothing happens ? Have you tried moving the gear slector to the neutral position to see if it starts then ? Park neutral safety switch problem , maybe .
Here is a description of how it works or how it's suppose to work .
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.

May 13, 2017 | 2004 GMC Envoy

2 Answers

2006 Ford Expedition will not start this morning, battery checks 12 volts, will not do anything when turn key to start position


You can jump starter relay to see if starter will crank the engine. Pull the starter relay, use jumper wire between terminals 30 and 87, terminal 30 is hot all the time and there is a fuse, the starter motor should crank the engine. If you try that make sure tranny is in park or neutral and parking brake is set. Two voltage circuits at starter motor, one is hot all the time. The other goes hot when relay is energized. The starter motor grounds through engine block. Battery positive and negative connections are important.
starter-xyhkswavnwbj1ruhj1l5cg0h-1-0.jpg

Nov 18, 2017 | 2006 Ford Expedition

1 Answer

My 02 Bonneville is having problems starting. When I turn the key nothing turns over... the radio comes on but nothing else will happen. At first if I waited 10-15 minutes it would start right up now it...


When you turn the ignition switch to start ,it sends 12 volt input to the PCM - engine computer . The PCM will then energize the start relay in the under hood fuse / relay distribution box.
Here is factory service info.
Circuit Description
Moving the ignition switch to the START position sends a 12 V signal to the PCM Ignition Crank Sense. The PCM verifies that the transmission is in the PARK or NEUTRAL position. The PCM then grounds the control circuit of the START relay. When the START relay is energized it allows battery positive voltage to the starter solenoid S terminal.

Try moving the gear selector to the neutral postion when it fails to start . To eliminate or confirm the park neutral safety switch as the problem . Are any lights lit on the insturment cluster ? Check engine , security ?

Aug 06, 2017 | 2002 Pontiac Bonneville

2 Answers

When i turn the key hear a clicking sound. Lights flicker as does security light. Dash gauges move up and down no turn over at all of engine. Replaced starter,tested battery,and alternator. No starter...


try turning the engine over by hand if it will not turn sounds like seized crank bearing.grab the harmonic wheel attached to crank shaft and use that to try and turn engine,

Oct 07, 2009 | 2002 Lincoln Town Car

Not finding what you are looking for?
Cars & Trucks Logo

Related Topics:

34 people viewed this question

Ask a Question

Usually answered in minutes!

Top Toyota Experts

yadayada
yadayada

Level 3 Expert

78936 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22326 Answers

Jeffrey Turcotte
Jeffrey Turcotte

Level 3 Expert

8836 Answers

Are you a Toyota Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...