Lexus GS350 won’t start – causes and how to fix it

Lexus GS350 won’t start – causes and how to fix it
Lexus GS350 is a reliable road companion, but its a machine with hundreds of interconnected parts, and like any other machine it sometimes fail to deliver normal operation. In this article we go through most common causes of GS350 breakdown and how you can fix the problem.
Lexus GS350 won’t start – causes and how to fix itLexus GS350
The most common causes that hinders normal starting process of your Lexus GS350 are abruptly winder flim-flam battery, dead 12v barrage, corrosion on battery terminals, bad alternator, clogged fuel percolate, break starter, blown fuse, empty accelerator tank, immobilizer mistake or any mistake in the electric system.

1. Weak Battery

If your GS350 ’ s engine won ’ thymine crank or cranks very slowly, then the most probable perpetrator is weak or all in 12v battery. Investigating more closely and doing a battery electric potential test will clarify whether the begin problem is ascribable to the battery. A test can be done to measure the electric potential between the battery poles, check the acid level and assess the condition of the newcomer battery.

If a fresh car battery has been installed, the barrage may not have even reached its broad capacity. There is nothing to worry about. A newly battery only develops its fully capacity over time .
Lexus GS350 won’t start – causes and how to fix it12v battery location on Lexus GS350

Test 12v battery

The voltage of the battery on your Lexus GS350 can be measured precisely with a multimeter. Before the quiz, the multimeter is set to the electric potential range of the barrage and connected to its asset and minus poles. successful screen of the car battery, i.e. checking the voltage, normally results in values ​​of approx. 12 to 13 volts. Values ​​above 14 or below 11.5 volts require an technical assessment of the condition of the car battery. Because the battery may have a defect with these measured values ​​and must be replaced .

Jump start Lexus GS350

If dead barrage is the reason for the dislocation of your GS350, you can well jump begin it using jumper cables and a healthy battery from another vehicle, or using a battery booster if available .
beginning get in touch red cable to the incontrovertible terminal of your GS350 ’ s dead battery, then to the positive terminal of donor barrage. future connect black cable to the negative terminal of donor barrage, then to the bare metallic in the locomotive bay of your GS350. Start the donor vehicle and then your GS350. Remove the cables in revoke order .
This image has an empty alt attribute; its file name is how-to-jump-start-car-illustration.pngIllustration for jump starting procedure

2. Corrosion on battery

corrosion on the contacts of your car battery leads to personnel casualty of contact and reduce current stream, which means that your engine can nobelium long start properly.
To know if your GS350 ’ s starting problems are from dirty battery contacts, you need to investigate them. If you lift the rubberize covers over the two battery terminals, you can check the terminals for corrosion. If you discover white deposits or silver-green deposits, but no far cracks or damage, you do not have to replace the battery, equitable clean it .

Clean battery corrosion

To clean the battery on your Lexus GS350, you have to remove the pole cables foremost, which requires no special cognition, good a little concentration, as the orderliness is identical crucial. first remove the black cable television from the negative perch. If the perch clamp is very tight, you can open it with pliers. We advise against using metal pliers, but if you use them, you must make sure that you do not touch any other parts of the consistency. Next you can unplug the red plus pole cable. Once the battery has been removed from the circuit, you can start cleaning the corrode battery. After clean, reconnect the terminals .

3. Weak key fob battery

If your GS350 has push start/stop button, then its potential that your vehicle may not start due to weak key fob battery. Don ’ triiodothyronine worry, you can calm start your vehicle – the battery is only used to send the signal for locking/unlocking. If the key fob battery is evacuate, the doorway no longer locks or unlocks at the push of a button. The doors must then be opened manually. The immobilizer is controlled by a passive transponder. passive means, among other things, that the transponder in the key does not need its own power source .

How to start Lexus GS350 with dead key fob battery

If you have a model of GS350 which merely has a key flim-flam with start/stop button and no place to insert a winder, then try placing your key fob as near to the start/stop release as you can and then start the fomite. If it doesn ’ triiodothyronine work, then look in your vehicle ’ s functional manual for accurate placement of cardinal fob placement, as it may vary depending on model .
Lexus GS350 won’t start – causes and how to fix itEngine Start/Stop button on Lexus GS350
Tip: You can try starting your GS350 with its second key. It will besides rule out any other trouble with the first key, for example, water damage .

4. Broken starter motor

A crank is a motor for starting the engine of your GS350. The average life of a starter motive is about 100,000 to 150,000 miles, and the life will be shortened if the engine is started more frequently. In any case, since the starter centrifugal besides has a limited life, it will break down after using the car for a long time, and if the crank motive breaks down, the locomotive will not start .
Symptom: When you turn the key to start the locomotive of your GS350, you will hear a cluck sound, which is the heavy of a bad starter centrifugal. And if the appetizer motor does not work with a healthy battery, suspect a malfunction of the starter .
If the starter fails, it normally needs to be replaced with a newly one .

Temporary fix for starter

If the engine does not start due to the starter, the locomotive may start if you turn the key while hitting the starter motor with something like a adhere or alloy joyride. This workaround is effective when the parts inside the newcomer are stuck in concert or the gears are slenderly out of alliance.

however, it is possible that the starter is nearing the end of its life, so it is recommended that you have it inspected at a dealer or alimony patronize .

5. Defective alternator

An alternator is a generator that produces electricity. If your GS350 ’ s alternator fails, it will not be able to produce electricity and the battery will not be able to charge. Therefore, even if you think that the cause of the engine not starting is a battery failure and replace the battery, the battery will soon run out and the engine will not start .
Alternators rarely break down. In finical, modern cars have improved performance, so it is said that they will last 200,000 to 300,000 miles. calm, it can break down depending on how you use it, and in the case of a practice car, the alternator may be quite erstwhile. Don ’ metric ton let your guard down .
If the alternator breaks down, it must be replaced with a modern alternator .

6. Clogged fuel filter

The fuel filter of your GS350 does not wear out like a mechanical function, but it gets clogged by dirt and airborne particles and clogs over time. The permeability of the percolate drops, and so does the fuel blackmail. To a certain extent this doesn ’ metric ton topic, but if the fuel filter is excessively dirty, the locomotive will no longer perform at broad capacity and in some exemplify may not start at all. Cleaning is not possible, you can merely change the filter .

7. Fuel pump failure

If your GS350 ’ s fuel pump fails, then the locomotive won ’ deoxythymidine monophosphate startle. The pump normally ensures that the necessary come of fuel is passed from the tank to the injection system of the engine with sufficient pressure .
Before your fuel pump stops working, it normally becomes noticeable : if your cable car ’ south engine breaks down from time to prison term, the car is unmanageable to start, the engine jerks a little or the engine performance drops, you should have your pump checked .
Wear or contamination of the pump can be the rationality for this. If the pump is leaking, a power touch is broken, a line or a pump pry is broken, the fuel pump is normally besides noticeable before failure. You can have a defective fuel pump replaced in your workshop .

8. Blown fuse

In rare cases, a blow fuse could besides be the perpetrator in the breakdown of your GS350. Check all fuses in the fuse box all-important for starting the locomotive. But, be careful when lending a hand yourself to the fuse box ! The corner is under power and repairs or tests should always be done in a workshop .

9. Defective spark plugs

Without functioning spark plugs, the engine will not start. The flicker fireplug themselves are much not affected by a defect. rather, plug connections on the ignition system come idle. If only one plug is actually lax, you can fix the problem yourself on web site. If a spark plug has failed, it must be replaced in the workshop .

10. Rodent damage

rodent damage can be another reason why your Lexus GS350 won ’ metric ton start. The animals crawl under the fomite and sting through cables and wires. In principle, this can affect all fomite systems such as the fuel issue, the vegetable oil provision or the ability issue .
The rodent damage can normally be seen cursorily by looking into the engine compartment. The wrong caused by the rodent bite can be repaired in the workshop. Be prepared for relatively high costs hera .

11. Engine failure

Although very rare, but it can besides be the cause of the breakdown of your GS350. If a vehicle has an engine bankruptcy, then nothing works anymore. It is not uncommon for the driver of a vehicle to be creditworthy for such damage. distinctive causes include tearing of the timing belt out, wrong fuel, insufficient anoint, hydrolock, overheating of the engine, or continuous drive in an excessive focal ratio range .
Lexus GS350 won’t start – causes and how to fix itLexus GS350
merely an experience automobile mechanic can diagnose locomotive failure in a workshop .

Use OBD2 scanner for diagnosis

Since Lexus GS350 is equipped with on-board diagnostics ( OBD ), a blame diagnosis can provide initial indications of where the malfunction is located.

To begin troubleshooting, you must first connect the diagnostic tool to your GS350. The OBDII connection is normally located under the dashboard. With the cable connected, you should turn the ignition on. But be careful not to start the engine. Most diagnostic devices then ask for some data about the vehicle. It is crucial that you enter this 100 % correctly, otherwise the leave of the search may be falsified. In addition to the fomite manufacturer and model, you normally besides have to type in the engine and vehicle ID total. For claim trouble-shoot, constantly check whether the data is discipline .


There are many reasons why your GS350 may not start. When looking for the gun trigger, you should constantly start with the most obvious causal agent, the empty battery .
In any shell, it is advisable for laypersons to call a dislocation servicing or a workshop. In the event of a defect, the latter can directly initiate the animate .

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Category : Car Brakes