How many colors are available for the Honda XR-V?

Can You Shift from D to S Gear While Driving an Automatic Car?

Automatic cars can shift from D to S gear while driving. The functions of D and S gears are fundamentally similar. The D gear is the drive gear of the car. When engaged, pressing the accelerator allows the car to move forward normally, with the automatic transmission handling gear shifts. The S gear, on the other hand, is the sport mode. Engaging this gear makes the automatic transmission downshift more aggressively, resulting in a more intense power response and a more exciting driving experience. Therefore, when the car is moving forward normally, most automatic models can shift directly from D to S gear. The transmission will perform continuous downshifts, and as long as the accelerator pedal is kept pressed, the ECU will generally automatically perform the corresponding fuel compensation. For cars with manual-automatic transmission, it's better to use D gear on highways because cars typically maintain speeds between 90-120 km/h, and there's less need for overtaking, rapid acceleration, or sudden deceleration when traffic is light. Under such conditions, using D gear ensures safer, smoother, and more fuel-efficient driving. As for the S gear, it's best used during overtaking. Since overtaking on highways often requires higher speeds, engaging S gear provides greater output torque, making the overtaking process quicker and safer.

7

1

Share

How to Return Paddle Shifters to Automatic Mode?

To return paddle shifters to automatic mode, pull the manual shift switch toward the steering wheel and hold for a few seconds. Below are relevant details about paddle shifters: 1. Function: They significantly enhance driving operability. Paddle shifters are typically located behind the steering wheel. When operating them, simply shift the gear into D, S, or manual mode, allowing the driver to perform upshifts and downshifts without taking hands off the steering wheel. 2. Shifting Techniques: (1) Depress the clutch and release the throttle: Before depressing the clutch and releasing the throttle, the vehicle speed is 32 km/h, and the engine speed is 2500 rpm. After depressing the clutch and releasing the throttle, the engine speed begins to drop. (2) Quickly shift the gear lever from second to third gear: After shifting to third gear, the vehicle speed remains at 32 km/h, but the clutch disc speed has dropped to 1686 rpm. (3) Observe the engine tachometer: When the speed drops to 1686 rpm, follow the clutch release operation to enter the semi-clutch state. Observe the tachometer, which should be around 1700 rpm.

6

5

Share

What is the correct way to use the automatic transmission D+ and D-?

Automatic transmission's "D+" and "D-" refer to the manual mode. In manual mode, the driver can shift gears up or down by operating "D+" and "D-". Pushing towards "D+" once increases the gear by one, and pushing towards "D-" once decreases the gear by one. Below are the ways to use D+ and D-: 1. When going downhill, you can shift up to D2 or D3 using "D+". Downhill driving requires the engine's braking effect, and 2nd or 3rd gear can meet the power demand without needing the high torque of 1st gear. Sometimes when going uphill with sufficient power, you also need to use "D+" to shift up to prevent power waste and damage to the engine and transmission. 2. When going uphill, greater power is needed, so you should use "D-" to downshift the vehicle for higher torque to climb. Similarly, if the vehicle speeds up uncontrollably when going downhill, you should also use "D-" to downshift and control the vehicle. In addition, "D-" can also be used for short overtaking or in congested road conditions.

11

5

Share

What is the difference between the yellow and red lights of the airbag?

The difference between the yellow and red lights of the airbag lies in the reasons for their illumination: 1. The yellow light indicates a fault in the airbag system, such as wiring or sensor issues. 2. The red light indicates problems like a faulty steering wheel clock spring, loose or poor contact of the airbag sensor, airbag body failure, or airbag ECU wiring issues. The airbag is an auxiliary configuration for passive vehicle safety, composed of the airbag sensor, collision airbag, and electronic control device. Below is how the airbag works: 1. When the vehicle experiences a certain level of collision force, the airbag system triggers a chemical reaction similar to a small explosive detonation. The airbag, hidden within the vehicle, inflates and deploys instantly, positioning itself in time before the occupant's body collides with interior components. 2. When the body contacts the airbag, the airbag begins to deflate through the holes on its surface, cushioning the impact and reducing the force exerted on the body.

7

3

Share

Which cylinder does the P0351 fault code indicate?

P0351 indicates a fault in the fifth cylinder; it refers to a primary or secondary circuit malfunction in ignition coil A. Below are the relevant details: 1. The control module in the ECU may have failed; alternatively, the control module could be within the ignition coil. 2. The ignition coil may have an internal breakdown or a primary short/open circuit. It is recommended to try replacing the ignition coil. If that doesn't work, consider replacing the ECU, provided the high-voltage damping wire and spark plugs are functioning correctly. Here is an introduction to the P0351 fault code: 1. The role of the ignition coil is to transform the 12-volt voltage from the car battery into the thousands or even tens of thousands of volts required for spark plug ignition. 2. The ignition coil contains two sets of windings: the primary coil and the secondary coil. The primary coil has thicker enameled wire with fewer turns, while the secondary coil uses thinner enameled wire with relatively more turns. 3. When the primary coil is connected to a power source, a strong magnetic field is generated around it as the current increases, and the iron core stores this magnetic energy. When the switching device disconnects the primary coil circuit, the magnetic field of the primary coil rapidly decays, inducing a high voltage in the secondary coil. 4. The Electronic Control Unit (ECU) continuously monitors each ignition main circuit. If the ECU does not receive a valid Ignition Diagnostic Monitor (IDM) pulse signal from the ignition module (integrated into the ECU), this fault code will appear. Possible causes include issues with the ignition start/run circuit, ignition coil circuit, the ignition coil itself, or a fault in the Electronic Control Module (PCM or ECM).

16

3

Share

What Causes the Engine to Roar Without Power When Accelerating Hard?

When the car's accelerator is pressed hard but lacks power, it is due to abnormal engine performance. The following are specific reasons: 1. The car engine operates through the coordinated work of the intake system, ignition system, and fuel system. If any of these components has an issue, it can potentially reduce the engine's power, leading to unresponsiveness when pressing the accelerator, inability to increase engine speed, and lack of power during acceleration. 2. When the accelerator is pressed, the throttle cable moves the throttle valve, which has a position sensor. The control unit uses the signal from the throttle position sensor to determine the throttle opening, calculates the corresponding signal voltage, and then determines the fuel injection amount based on this voltage. If the throttle position sensor is dirty or the voltage is imbalanced, it can cause electronic throttle failure, resulting in a lack of power when accelerating hard. 3. Apart from electronic throttle issues, attention should also be paid to the engine's intake, fuel system, and ignition system. If there is a leak or blockage in the intake system, it can also lead to a lack of power when accelerating hard.

6

1

Share

How many colors are available for the Honda XR-V?

Can You Shift from D to S Gear While Driving an Automatic Car?

How to Return Paddle Shifters to Automatic Mode?

What is the correct way to use the automatic transmission D+ and D-?

What is the difference between the yellow and red lights of the airbag?

Which cylinder does the P0351 fault code indicate?

What Causes the Engine to Roar Without Power When Accelerating Hard?

What is the top speed of the Honda Forza 350?

Which dash cams continue working after the car is turned off?

What is the difference between IVT transmission and CVT transmission?

Which line to stop at for the fixed-point parking on the slope in Subject 2?