Question about 2000 Lexus LX470

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Excessive cranking to start l x 470, 2000, after start, runs normal ....

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Unless you can hear the starter slipping and not engaging, your delayed start is most likely ignition or fuel related.If you can hear the engine turning over slowly and nor firing that could be a result of a low battery.
It may be time for new plugs or injector cleaner, however you say the LX runs smoothly. Please post more details,ie mileage since last tune up , etc.

Posted on Jan 03, 2010

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O5 Colorado got the ecm code when I shut off the truck and now it won't turn over


What ECM code ? What is everything else that is working ? Headlamps , inside lighting , radio etc... When you turn the key on do the instrument cluster warning lights come on then off a few seconds later ? Anti-theft (security light ) On ? Flashing ? Do you know what all is involved ,or happens when you turn the key to start ?
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.


Verify that no starter relay, immobilizer, or automatic transmission DTCs are set that would cause the PCM to disable starting.
? If the specified DTCs are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle .
Ignition ON, observe the scan tool PCM Ignition 1 Signal parameter with a scan tool. The reading should be greater than 10.0 Volts.
? If less than the specified value, test the ETC, PCM 1, and PCM B fuses, the RUN/CRNK relay, and the PCM ignition voltage circuits for an open/high resistance. If the circuits test normal, replace the PCM.
Ignition OFF, remove the START relay.
Verify that a test lamp illuminates between the B+ circuit terminal 30 and ground.
? If the test lamp does not illuminate, test the START fuse and the B+ circuit for an open/high resistance.
Ignition ON, transmission in Park or clutch pedal pressed, verify that a test lamp illuminates between the PNP/clutch start switch signal circuit terminal 86 and ground.
? If the test lamp does not illuminate, test the IGN fuse, RUN/CRANK relay, PNP/clutch switch ignition voltage circuit, and the signal circuit for a short to ground or an open/high resistance. If the circuits test normal, test or replace the PNP switch or the clutch start switch.
Connect a test lamp between the park/neutral signal circuit terminal 86 and the relay coil control circuit terminal 85.
Ignition ON, transmission in Park, or clutch pedal pressed, turn the ignition switch between the START and RUN positions. The test lamp should turn ON and OFF when changing between the commanded states.
? If the test lamp is always ON, test the relay control circuit for a short to ground. If the circuit tests normal, replace the PCM.
? If the test lamp is always OFF, test the relay control circuit for a short to voltage or an open/high resistance. Test the PNP/clutch start switch signal circuit for an open/high resistance. If the circuits test normal, replace the PCM.
Install the START relay.
Connect a test lamp between the starter solenoid terminal and ground.

Mar 12, 2017 | Cars & Trucks

1 Answer

Have a 2003 Isuzu rodeo 6 clyinder 4wheel . Starter turns over a little longer before cranking. Done tune up, changed out fuel regulator but still dose the same ,what is my problem . t


a little longer before cranking.

what does that mean?

dont crank,
cranks slow.
cranks (Fast) called normal.
cranks fast starts, then stalls.
cranks fast, starts easy, starts, runs and stays running, normal
at what point does it fail, and how exactly.

we can't hear it, or watch you, so...................................

Dec 13, 2015 | 2003 Isuzu Rodeo

1 Answer

2005 mazda 6 would not start engine cranks but would not start leave for a day then it just starts first crank ongoing problem


It sounds as though the engine might have flooded with fuel. Leaving it for a day will allow the excess fuel to evaporate. Try using cold start (a petroleum ether). It is wise not to use this too frequently, though.

Jan 19, 2015 | 2005 Mazda 6

1 Answer

2004 santa se 2.4L Temp gauge reads normal, but heat from vents excesivlly hot.will not start after running for a while until it sits 1/2 hr.


There is a blower control resistor (manual system) or a blower transistor (automatic temp system) located behind the glove compartment in the HVAC box and this is a high failure item.

Mar 19, 2014 | 2004 Hyundai Santa Fe

1 Answer

Car wont start


Code 420 means the catalytic converter is not up to standard, which may not have any connection to your current problem.
The other codes deal with issues concerning the gas tank vent and purge controls which could be causing excessive pressure in the gas tank.
I would want to know if you have normal fuel pressure at the injectors, and if there is excessive pressure building up in the tank.

Feb 20, 2014 | Cars & Trucks

1 Answer

98 dodge ram no fuel pressure with key on but will start with extending cranking


There is a check valve inside the fuel pump module that is suppose to keep fuel pressure in the fuel line's an fuel rail . Need a new fuel pump .

Jan 03, 2018 | Dodge Ram 1500 Cars & Trucks

1 Answer

I HAVE A 94 B4000. AND IT RUNS GRATE. IT WILL START JUST FINE\r\nIF IT HAS SAT THERE ALL NIGHT. BUT AFTER ITS GOT UP TO RUNNING TEMP. AND YOU SHUT IT OFF. IT JUST WONT START. BUT YOU CAN PULL IT AND THEN...


A couple of thoughts: Test the alternator charging output and make sure it is operating normally. You didn't mention what happens when you try to restart, does it crank over normally or not at all? If your vehicle is high miles, which would be normal for a 94, you could have a bad starter. I have seen starters with worn bushings crank OK when cold, but when hot, the armature will drag and cause low/no cranking speed and an excessive amperage draw from the battery. Starter draw can be tested. I would suggest going to a parts store, such as Advance where you can have it tested, probably for free. Have them test battery, alternator output and starter amp draw, then buy what you need.

Feb 03, 2018 | 2007 Mazda B4000

1 Answer

I have a gmc 1500 5.7 1/2 ton truck after sitting overnight its hard starting, will crank over after several attemps will start. after running no starting problems. thanks


The check valve in the fuel pump may be bad, allowing the gasoline to return to the tank, causing excess cranking to get fuel back to the motor to start.

Oct 21, 2010 | 1997 GMC Sierra

1 Answer

93 wrangler 2.5 will crank but won't start. I pour gas down the #1 cylinder and put the plug back in and it will crank for about 8 seconds then sputter to life and idle and run fine. Shut it off and try to...


Yes...check the pump, filter and output. Also check the ballast resistor for the pump. Stop pouring fuel into the cylinder...instead, use carb cleaner and spray into throttle body (excess fuel in one cyl will contaminate your engine oil). If it runs normally after you get it started likely the pump is good (unless you have problems at high rpm's under power) Regulator is likely good as well...default is to more fuel not less.

Oct 07, 2009 | 1994 Jeep Wrangler

2 Answers

HARD STARTING PROBLEM


Engine Cranks Excessively
(Definition: the key is turned and the engine is cranking, but it takes longer than usual before the engine to start running.)
Troubleshooting Procedure

Jul 18, 2008 | 1994 Chevrolet Beretta

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