Toyota Corolla won’t start – causes and how to fix it

Toyota Corolla won’t start – causes and how to fix it
Toyota Corolla 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 Corolla’s breakdown and how you can fix the problem.
Toyota Corolla won’t start – causes and how to fix itToyota Corolla twelfth generation – (photo by Toyota)
The most common causes that hinders normal starting mathematical process of your Corolla are dead key flim-flam barrage, absolutely 12v battery, corrosion on battery terminals, bad alternator, clogged fuel percolate, break starter, blown blend, evacuate gas tank, immobilizer erroneousness or any fault in the electrical arrangement.

1. Weak Battery

If your Corolla ’ s engine won ’ t zigzag or cranks very slowly, then the most probably perpetrator is a weak or dead 12v battery. Investigating more close and doing a battery electric potential test will clarify whether the begin problem is due to the battery. A examination can be done to measure the electric potential between the battery poles, check the acid charge and assess the condition of the appetizer battery.

If a newfangled cable car barrage has been installed, the battery may not have yet reached its full capacitance. There is nothing to worry about. A raw battery only develops its entire capacity over time .
Toyota Corolla won’t start – causes and how to fix itBattery location on Toyota Corolla twelfth generation

Test 12v battery

The voltage of the battery on your Toyota Corolla can be measured precisely with a multimeter. Before the test, the multimeter is set to the voltage stove of the battery and connected to its summation and minus poles. successful test of the car battery, i.e. checking the electric potential, 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 blemish with these measured values ​​and must be replaced .

Jump start Toyota Corolla

If dead barrage is the reason for the dislocation of your Corolla, you can well jump begin it using jumper cables and a healthy battery from another vehicle, or using a battery booster if available .
foremost connect loss cable to the cocksure concluding of your Corolla ’ s dead barrage, then to the positivist terminal of donor battery. future associate black cable television to the negative terminal of donor battery, then to the bare metallic in the locomotive bay of your Corolla. Start the donor vehicle and then your Corolla. 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 cable car battery leads to loss of reach and reduce current flow, which means that your engine can nobelium long start properly.
To know if your Corolla ’ 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 further cracks or price, you do not have to replace the battery, merely clean it .

Clean battery corrosion

To clean the battery on your Toyota Corolla, you have to remove the pole cables beginning, which requires no extra cognition, good a little concentration, as the ordain is identical important. beginning remove the black cable from the negative pole. If the pole clamp is very compressed, 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 body. Next you can unplug the crimson positive pole cable. Once the battery has been removed from the tour, you can start cleaning the corrode battery. After clean, reconnect the terminals .

3. Weak key fob battery

If your corolla has push start/stop push button, then its possible that your vehicle may not start ascribable to weak key fob battery. Don ’ thymine concern, you can still start your fomite – the battery is alone used to send the bespeak for locking/unlocking. If the keystone flim-flam battery is empty, the door no longer locks or unlocks at the tug of a button. The doors must then be opened manually. The immobilizer is controlled by a passive voice transponder. passive means, among other things, that the transponder in the keystone does not need its own power informant .

How to start Toyota Corolla with dead key fob battery

If you have a mannequin of Corolla which lone has a key fob with start/stop release and no position to insert a key, then try placing your key fob as close to the start/stop button as you can and then start the vehicle. If it doesn ’ metric ton work, then look in your vehicle ’ s operational manual for claim location of cardinal fob placement, as it may vary depending on exemplary .
Tip: You can try starting your corolla with its second key. It will besides rule out any early problem with the first key, for model, water damage .

4. Broken starter motor

A starter is a motor for starting the engine of your Corolla. The modal life of a starter drive is about 100,000 to 150,000 miles, and the life will be shortened if the engine is started more frequently. In any encase, since the starter motor besides has a limited life, it will break down after using the car for a long time, and if the starter centrifugal breaks down, the locomotive will not start .
Symptom: When you turn the cardinal to start the engine of your Corolla, you will hear a click phone, which is the voice of a badly crank motor. And if the starter drive does not work with a goodly battery, suspect a malfunction of the newcomer .
If the starter fails, it normally needs to be replaced with a new one .

Temporary fix for starter

If the locomotive does not start due to the newcomer, the engine may start if you turn the key while hitting the newcomer motive with something like a lodge or metal tool. This workaround is effective when the parts inside the starter are stuck together or the gears are slightly out of conjunction.

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 principal or maintenance denounce .

5. Defective alternator

An alternator is a generator that produces electricity. If your Corolla ’ 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 barrage failure and replace the barrage, the battery will soon run out and the engine will not start .
Alternators rarely break down. In particular, modern cars have improved performance, so it is said that they will stopping point 200,000 to 300,000 miles. silent, it can break down depending on how you use it, and in the lawsuit of a use car, the alternator may be quite old. Don ’ thymine let your guard down .
If the alternator breaks down, it must be replaced with a new alternator .

6. Clogged fuel filter

The fuel trickle of your corolla does not wear out like a mechanical share, but it gets clogged by scandal and airborne particles and clogs over time. The permeability of the filter drops, and so does the fuel blackmail. To a certain extent this doesn ’ deoxythymidine monophosphate matter, but if the fuel filter is besides dirty, the engine will no longer perform at full capacity and in some case may not start at all. Cleaning is not potential, you can lone change the trickle .

7. Fuel pump failure

If your Corolla ’ s fuel pump fails, then the engine won ’ thymine originate. The pump normally ensures that the necessary come of fuel is passed from the tank to the injection system of the engine with sufficient press .
Before your fuel pump stops working, it normally becomes noticeable : if your car ’ randomness locomotive breaks down from time to clock, the cable car is difficult 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 reason for this. If the pump is leaking, a power contact is broken, a line or a pump lever is broken, the fuel heart 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 Corolla. Check all fuses in the fuse box essential for starting the engine. But, be careful when lending a hand yourself to the blend box ! The box is under exponent and repairs or tests should constantly be done in a workshop .

9. Defective spark plugs

Without functioning discharge plugs, the locomotive will not start. The spark hack themselves are much not affected by a defect. alternatively, plug connections on the ignition system come loose. If merely one plug is actually loosen, you can fix the problem yourself on locate. If a spark hack has failed, it must be replaced in the workshop .

10. Rodent damage

rodent damage can be another reason why your Toyota Corolla won ’ thymine startle. The animals crawl under the vehicle and pungency through cables and wires. In principle, this can affect all fomite systems such as the fuel issue, the anoint supply or the office provide .
The rodent damage can normally be seen quickly by looking into the engine compartment. The damage caused by the rodent pungency can be repaired in the workshop. Be prepared for relatively senior high school costs here .

11. Engine failure

Although very rare, but it can besides be the campaign of the breakdown of your Corolla. If a vehicle has an locomotive failure, then nothing works anymore. It is not uncommon for the driver of a fomite to be responsible for such damage. typical causes include tearing of the time belt out, incorrect fuel, insufficient oil, hydrolock, overheating of the engine, or continuous drive in an excessive speed crop .
alone an feel machinist can diagnose locomotive failure in a workshop .

Use OBD2 scanner for diagnosis

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

To begin troubleshooting, you must first connect the diagnostic tool to your Corolla. The OBDII connection is normally located under the dashboard. With the wire connected, you should turn the ignition on. But be careful not to start the engine. Most diagnostic devices then ask for some information about the vehicle. It is significant that you enter this 100 % correctly, differently the resultant role of the search may be falsified. In accession to the vehicle manufacturer and exemplar, you normally besides have to type in the engine and vehicle ID total. For exact trouble-shoot, always check whether the information is correct .


There are many reasons why your corolla may not start. When looking for the trigger, it is advisable to use the exception principle and merely start with the most obvious cause, the empty barrage .
In any shell, it is advisable for laypersons to call a breakdown service or a workshop. In the event of a defect, the latter can directly initiate the repair .

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Category : Car Brakes