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Toyota Forklift Error Code E06-1, E06-2 Troubleshooting Guide

E06-1 and E06-2 on a Toyota Forklift are simply indicators that it’s time for a throttle check. Follow our expert advice for a hassle-free troubleshooting experience, and you’ll have your forklift performing at its best in no time.

Error Code E06-1 and E06-2 on Toyota Forklift: The 3 Main Causes

The best running forklift is thanks to knowing your codes. Remember that E06-1 or E06-2 on the Toyota’s dash is not to be ignored as they are your lift truck’s way of saying something urgent by waving a red flag. Let’s look at what these codes mean and which parts they relate to, so your forklift stays in tip-top condition.

An illustration of the portion related to Toyota Forklift Error Code E06-1 and E06-2.
An illustration of the portion related to Toyota Forklift Error Code E06-1 and E06-2.

1). Throttle Motor Issue:

The throttle motor in a forklift controls the airflow to the engine, which manages the engine’s power and speed. If there’s an issue with the throttle motor, your Toyota Forklift might show error codes E06-1 and E06-2. This problem can make the engine act up, reduce efficiency, or even totally lose power. That makes it hard to operate the forklift safely and effectively.

2). Wiring Harness Issue:

In forklifts, a wiring harness is the network of wires and connectors that send electrical signals and power through the vehicle. If there’s an issue with the harness, like damaged wires or loose connections, it can mess up communication between different forklift parts. This could set off the E06-1 and E06-2 error codes and could cause the electrical systems to partially or completely fail. That leads to operation problems and potential safety issues.

3). Engine Controller Issue:

The engine controller is basically the forklift’s computer. It manages different engine functions to keep everything running smoothly. An issue with the engine controller could make error codes E06-1 and E06-2 show up. This problem could lead to improper engine management, impacting performance, fuel efficiency, and emissions. In bad cases, it could stop the forklift from starting or make it stall while operating.

Resetting Guide

To resolve the error codes E06-1 or E06-2 on a Toyota Forklift, resetting the fault codes can often remedy the issue. However, if the errors continue to appear, it may indicate a malfunctioning throttle or wiring harness connectivity problem that requires troubleshooting.

Here’s how to reset an E06 error on a Toyota Forklift:

  1. The first step is to disconnect the negative battery terminal for at least 10 seconds. This resets the forklift’s computer system and clears any stored error codes.
  2. Next, disconnect the water inlet to parts G6 and AG1. Inspect these connections – they bring water into the system for cooling, so any blockages or leaks here can cause overheating issues that trigger an E06 code.
  3. Reconnect any loose connections. Make sure there’s no corrosion or damage.
  4. Reconnect the water inlet tubes and battery negative terminal.
  5. Then, turn the ignition key to the “ON” position to start the engine and check if any error codes are displayed.
  6. If no errors appear, the issue was likely a loose or corroded connector in the wiring harness. Connector issues can disrupt signals to the forklift’s computer and throttle, causing error codes. Tightening or cleaning the connectors should resolve the problem and prevent the error from returning.
  7. But if the E06 error remains, there is likely an internal issue with the throttle motor or wiring harness. Further troubleshooting of the throttle and harness circuits will be needed to pinpoint the root cause.

The key points are to first reset the error code, and then inspect the water inlet connections. If the error returns, it indicates a deeper issue that requires advanced troubleshooting of the throttle and wiring.

E06-1 and E06-2 Error Code Troubleshooting Guide

As shared above, error code E06-1 or E06-2 in most cases boils down to one of three components – the throttle motor, wiring harness, or engine control unit. The tricky part is figuring out which one. Instead of a shotgun approach, let’s walk through the step-by-step troubleshooting guide.

I’ll explain the telltale signs of each potential culprit, tests to perform, and how to zero in on the root cause. By working together to isolate the source of the problem, you can get your forklift operating optimally once again.

1). Throttle Motor Resistance Inspection

First up, you need to carry out a throttle motor inspection. This involves testing the motor itself separately from the rest of the system.

  1. To do this, turn the ignition key switch OFF first.
  2. Then, disconnect connector G6 and connect connector G27 instead. G6 is the main throttle motor connector while G27 allows us to test the motor individually.
  3. Now we can check the throttle motor resistance.
  4. Use your multimeter probes to measure between pins G6-2 and G6-1 on the motor side.
  5. The standard readings we’re looking for are: 0.3 to 100 ohms at 20°C.
  6. We want the resistance reading to be somewhere between 0.3 and 100 ohms when the motor is at room temperature. If the reading is way outside this range, there’s likely an issue with the motor’s resistance internally. This could be due to worn-out windings or bad connections.
G6-2 ~ G6-10.3 ~ 100 Ω (20°C)
The throttle motor should show these resistance readings (Motor side).

When resistance is the culprit, there are a few ways you can get things back in shape:

  • Clean the motor connectors and pins to clear any corrosion or dirt buildup causing high resistance. Use electrical contact cleaner spray.
  • Test the motor windings for opens or shorts. If found, the motor will likely need replacement.
  • Check wiring between the motor and ECU for damage that could introduce resistance. Repair any cuts, fraying, etc.

The key is zeroing in on any resistance abnormalities and eliminating their cause.

2). Throttle Valve Drive Condition Inspection

If the throttle motor checks out okay, the next step is to take a look at the throttle valve. There are a couple of standard checks to perform to ensure the valve is working right:

1. The throttle valve should operate smoothly when fully opened. This means when you push the throttle down, it should move smoothly without catching or sticking. If it does not operate smoothly, it could indicate a mechanical issue like binding, contamination, or wear and tear.

2. The throttle valve should operate smoothly when fully closed. Similarly, when you let off the throttle and it returns to the closed position, it should move smoothly back to closure. Any sticking, catching, or uneven movement could signify a problem.

3. The throttle should return to opener angle when released. When you let go of the throttle, it should spring back to the idle/opener angle position. If it sticks part-way, doesn’t return at all, or goes past the opener angle, it suggests an issue with the return spring or mechanism.

Overall, the throttle valve needs to move through its full range of motion smoothly and precisely, both when actuated and when returning. Any deviation from the standard values indicates a potential issue needing diagnosis and repair. Binding, sticking, contamination in the mechanism, or spring and linkage wear could all contribute to abnormal operation.

3). Harness Continuity and Short-Circuiting Inspection

Once you’ve ruled out problems with the throttle motor and throttle valve drive on your Toyota forklift, it’s likely an electrical issue triggering the E06-1 and E06-2 error codes. The wiring harness, which relays power and signals through the forklift, may have continuity or short circuit problems.

Here’s how to inspect the harness for continuity and short-circuiting:

1. Turn the ignition key switch to the OFF position.

    2. Disconnect connectors G27 and G6.

    3. Then, use a multimeter to check for continuity between the following points:

    • G27-6 to G6-2: You should find continuity here.
    • G27-5 to G6-1: Continuity should also be present here.

    4. You should also ensure there is no continuity between these points:

    • G27-6 to the Frame
    • G27-5 to the Frame
    • G27-6 to G27-5
    • G27-6 to G27-7
    • G27-5 to G27-7
    G27-6 ~ G6-2Continuity
    G27-5 ~ G6-1Continuity
    G27-6 ~ FrameNo Continuity
    G27-5 ~ FrameNo Continuity
    G27-6 ~ G27-5No Continuity
    G27-6 ~ G27-7No Continuity
    G27-5 ~ G27-7No Continuity
    The table lists standard continuity and short circuit readings for harness inspections.

    If any of those readings are out of spec, there’s likely a wiring issue causing the E06-1 code. A break in continuity means there’s an open circuit, while unwanted continuity points to a short circuit. Make sure to thoroughly inspect the harness connectors and wires. Look for chafing, bare wires, corroded terminals, etc. Repair or replace any damaged wiring as needed.


    When you see the E06-1 and E06-2 error codes flashing on your Toyota forklift, it’s a sign that something’s up with the throttle system. These codes mean there could be issues with the throttle motor, wiring, or engine control unit. To fix it, you need to follow some steps. First, reset the error code. Then, check the water inlet connections. After that, test the throttle motor’s resistance and valve. Finally, inspect the wiring harness for any issues. By doing these steps, you can find out what’s wrong and get your forklift back to working well and safely.

    Checking The Hydraulic Fluid Level & Reading The Hydraulic Oil Dipstick On A Toyota Forklift

    Learning how to read Toyota Forklift hydraulic oil dipstick is an important skill for forklift operators. So as to ensure proper maintenance and performance of the machine. Understanding the readings on the forklift’s dipstick can help identify potential issues with the hydraulic system, such as low fluid levels or a hydraulic leak.

    How To Read Toyota Forklift Hydraulic Oil Dipstick?

    1). Park the forklift on level ground. The operator should park the forklift on a level surface to ensure the even distribution of hydraulic oil in the tank.

    2). Lower the forks and the lift cylinders to the ground. Ensure that the forks and the lift cylinders are lowered to the ground and in a level position. When the forks and lift cylinders are elevated or tilted, it will cause some of the hydraulic fluid to be in the lift cylinders. And you won’t get an accurate reading.

    3). Set the parking brake. To prevent the forklift from moving, set the parking brake.

    4). Turn off the engine. Switch off the engine and wait for 5 to 10 minutes to allow all the hydraulic fluid to be pushed back into the reservoir. This will ensure that you get an accurate reading.

    5). Remove the cap from the forklift hydraulic fluid reservoir. If you’re unsure of the dipstick’s location, refer to the owner’s manual to locate the hydraulic tank. Most Toyota Forklift models have the hydraulic fluid reservoir located near the battery.

    6). Pull out the dipstick and wipe it clean. Pull out the dipstick, wipe it clean with a clean rag, and ensure it’s dry before reinserting it.

    7). Reinsert the dipstick and remove it again to check the oil level. Insert the dipstick fully and remove it again to check the oil level. The dipstick has markings on it (usually notched, dimpled, scribed, or numbered) indicating the acceptable range for the hydraulic oil level.

    8). Check the oil level. The optimal hydraulic fluid level is between the ‘Medium’ to ‘High’ marks. If the oil level is above the ‘high’ mark, it may result in leakage or spills when the engine is hot and running. If the oil level is below the ‘low’ mark, it may impact the forklift’s lifting and steering abilities.

    Toyota Forklift parked on a flat ground for hydraulic oil measurement reading
    An image of a Toyota forklift parked on a level ground with its lift cylinders lowered, as the operator takes a hydraulic oil measurement reading.

    Types Of Dipsticks Found In Toyota Forklifts

    Toyota Forklift models use several types of dipsticks. Some common types of dipsticks include:

    Flexible dipstick: This type of dipstick is made of a flexible material, such as plastic or rubber, and is commonly used in newer models. It may have numbered markings on it to indicate the oil level.

    Hydraulic oil dipstick with flexible plastic design and clear readings. 50 indicates low oil, while 70 marks the optimal oil level.

    Steel rod dipstick: This type of dipstick is made of a steel rod and is commonly used in older models. It may also have numbered or dotted markings on it to indicate the oil level.

    A steel hydraulic oil dipstick with clear readings for precise hydraulic oil measurements.

    Electronic dipstick: This type of dipstick is used in modern variants and does not require manual checking. It uses sensors to measure the oil level and displays it on the vehicle’s dashboard.

    Regardless of the type of dipstick used, the most important thing to focus on is the high and low marks on the dipstick. These marks indicate the minimum and maximum levels of the fluid. And should be used as a guide to ensure that the fluid is at the appropriate level.

    In the case of the Toyota Forklift, the hydraulic fluid level should be at or near the high mark to ensure the proper functioning of the hydraulic system. The hydraulic system includes components such as the hydraulic pump, cylinders, and hoses, which are responsible for lifting and moving loads. Maintaining the proper hydraulic fluid level is essential for the safe and efficient operation of the forklift.

    Locating The Hydraulic Oil Dipstick On Your Toyota Forklift

    The location of the hydraulic oil dipstick on a Toyota forklift varies depending on the forklift model. However, there are some common areas to look for the dipstick, which include:

    • Behind the operator’s seat
    • On the side of the forklift mast
    • On the hydraulic fluid reservoir

    If you’re having trouble locating the hydraulic oil dipstick, you can refer to your forklift’s user manual for guidance. The manual will provide detailed instructions on where to find the dipstick and how to read it.

    Tips For Finding The Dipstick In Hard-to-Reach Areas

    Some forklift models have hydraulic oil dipsticks in hard-to-reach areas, making it challenging to check the hydraulic oil level. If you’re having trouble finding the dipstick, here are some tips that can help:

    • Use a flashlight to spot the dipstick. This can help you locate the dipstick in dimly lit areas or areas with poor visibility.
    • If the dipstick is still challenging to find, you can use a mirror to see the reflection. This can help you locate the dipstick even if it’s in a tight or hard-to-reach area.
    • If you’re still having trouble finding the dipstick, seek help from a forklift technician. A technician will have the necessary tools and expertise to locate the dipstick quickly and efficiently.

    Understanding The Importance of Hydraulic Oil In A Toyota Forklift

    The hydraulic oil in a forklift serves multiple functions, including lubricating moving parts, transferring power, and reducing heat buildup. Without it, the forklift wouldn’t be able to perform its primary functions, which include lifting and transporting heavy loads. Therefore, it’s essential to keep the hydraulic oil at the optimal level and quality.

    Functions Of Hydraulic Oil In A Forklift

    The hydraulic oil in a forklift is a critical component that performs several essential functions.

    One of the primary functions of hydraulic oil is to lubricate the moving parts of the forklift. This lubrication helps to reduce friction between the parts, which can cause wear and tear over time.

    Additionally, hydraulic oil helps to transfer energy from one area to another, which is crucial for the forklift’s operation.

    The hydraulic oil also helps to cool the system parts, preventing overheating, and reducing the risk of breakdowns.

    Finally, hydraulic oil helps to prevent rusting of metal parts, which can occur due to exposure to moisture.

    It is important to note that the hydraulic oil’s quality and level play a critical role in the forklift’s performance. If the hydraulic oil level is low or the oil is contaminated, it can cause significant problems that can lead to breakdowns and increased maintenance costs.

    Toyota Forklift
    The hydraulic oil in a forklift serves multiple functions, including lubricating moving parts, transferring power, and reducing heat buildup.

    Signs Of Low Or Contaminated Hydraulic Oil

    It’s essential to pay attention to the signs that indicate low or contaminated hydraulic oil in a forklift. Here are some of the most common signs:

    • Difficulty in lifting or lowering loads: If you notice that the forklift is struggling to lift or lower loads, it could be a sign of low or contaminated hydraulic oil. This issue can cause the forklift to work harder, leading to premature wear and tear on the parts.
    • Unusual noises from the hydraulic system: Unusual noises, such as grinding or whining, can be a sign of low or contaminated hydraulic oil. If left unaddressed, this issue can cause damage to the hydraulic system.
    • Unusual increase in temperature: If you notice that the forklift’s temperature is rising unusually, it could be a sign of low or contaminated hydraulic oil. Overheating can cause significant damage to the forklift’s engine and other parts.
    • Slow movement of the hydraulic cylinder: If the hydraulic cylinder is moving slowly, it could be a sign of low or contaminated hydraulic oil. This issue can cause the forklift to work harder, leading to premature wear and tear on the parts.
    • Irregular pressure through the hydraulic system: If you notice that the pressure through the hydraulic system is irregular, it could be a sign of low or contaminated hydraulic oil. This issue can cause the forklift to work harder, leading to premature wear and tear on the parts.

    It’s important to address these signs as soon as possible to prevent further damage to the forklift. Regular maintenance and inspection of the hydraulic oil can help prevent these issues from occurring.

    Recommended Hydraulic Oil Change Intervals

    Toyota, a major forklift manufacturer, recommends that the hydraulic oil be replaced every 6 months or after 1,000 hours of use to ensure the hydraulic system’s proper functioning. This regular maintenance can help to prevent costly breakdowns and ensure that the forklift remains safe to operate. It is the responsibility of the forklift operator to check the hydraulic fluid level during the pre-shift inspection and ensure that it is at the appropriate level.


    How To Prepare A Forklift For An Accurate Hydraulic Oil Reading?

    To prepare a forklift for an accurate reading of the hydraulic oil dipstick:

    1. First, park the forklift on level ground.
    2. Lower the forks and the lift cylinders to the ground and ensure they are in a level position, as elevated or tilted forks and cylinders can result in inaccurate readings.
    3. Turn off the forklift engine and allow the hydraulic system to cool down for approximately ten minutes. This allows the hydraulic oil to settle at the correct level and temperature for an accurate reading. Avoid checking the dipstick immediately after turning off the engine, as the oil level may appear higher due to oil still circulating in the system.

    What To Do If Your Hydraulic Oil Level Is Too Low?

    If your hydraulic oil level is too low, you need to top it up slowly until it reaches the ‘Full’ mark. It’s important to use the correct type of hydraulic oil recommended by the forklift manufacturer to avoid damaging the hydraulic system. Before adding the hydraulic oil, ensure that the forklift is on level ground and the engine is turned off. Once the hydraulic oil level is optimal, start the forklift and let it operate for a few minutes to ensure it’s working correctly. 

    It’s also essential to check for any leaks that may have caused the hydraulic oil level to drop. Leaks can occur due to damaged hoses, seals, or fittings. If you notice any leaks, it’s crucial to have them repaired promptly to avoid further damage to the hydraulic system.

    What to Do If Your Hydraulic Oil Level Is Too High?

    If your hydraulic oil level is too high, you need to drain out some of the oil until it reaches the optimal level. Overfilling the hydraulic oil system can cause leaks and damage the hydraulic system’s components. It’s important to use a clean container to collect the excess hydraulic oil and dispose of it properly.

    Overfilling can also cause foaming, which can lead to air entering the hydraulic system. Air in the hydraulic system can cause cavitation, which can damage the hydraulic pump and other components. If you notice any foaming, it’s essential to drain out the excess hydraulic oil and refill it to the optimal level.