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What is the reason for the Toyota Corolla DCM connection failure?

1 Answers
DelAllie
07/30/25 4:31am
The reason for the Toyota Corolla DCM connection failure is signal issues, as poor signal quality prevents network connectivity. Relevant information about the DCM system is as follows: 1. Introduction: The automotive DCM is a network communication function module used in vehicles, enabling instant connectivity with a single press, allowing users to enjoy high-speed communication without considering login time or data transfer volume. Additionally, the DCM features automatic reconnection when interrupted, such as when the vehicle passes through a tunnel. The DCM has three electrical connectors, from left to right: Port A (20 pins), Port B (16 pins), and Port C (12 pins). The power supply and grounding for the DCM controller are connected to the rightmost Port C. 2. Function-based: Depending on the function, the DCM is powered by three circuits: constant power 0220 (ensuring power for remote key and central locking functions), 0240, and 0260 (ensuring power for electric windows and mirror adjustment). Different faults in these power circuits will have varying impacts.
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More Forum Discussions

What does the exclamation mark light mean?

When an indicator light with an exclamation mark appears on the dashboard, it indicates an abnormality or malfunction in the corresponding part of the vehicle. There are various fault lights with exclamation marks in a car, each representing different issues. These mainly include the handbrake warning light, brake system fault warning light, steering system fault warning light, tire pressure abnormality warning light, lighting system fault warning light, transmission fault warning light, and windshield wiper fault warning light. Below is a detailed introduction: 1. Yellow triangle exclamation mark: This yellow triangle exclamation mark is a general fault indicator light. It may illuminate due to reasons such as clutch overheating, fuel cut-off system intervention or malfunction, parking sensor fault, exterior light bulb fault, engine oil pressure sensor fault, or traction control system warning or malfunction. 2. Tire pressure indicator light: Also a type of exclamation mark fault light. It briefly illuminates during ignition but automatically turns off after a few seconds, which is normal. However, if the tire pressure indicator light stays on or flashes, the most likely reason is abnormal tire pressure in one of the tires. 3. Lighting fault light: This light turns on when an exterior light bulb malfunctions, featuring an exclamation mark inside the bulb symbol, making it part of the exclamation mark fault light category. 4. Steering system fault indicator light: Also marked with an exclamation sign. It illuminates when the electric/mechanical steering mechanism fails or when there is a fault in the steering column lock. 5. Brake system fault light, transmission fault indicator light, and windshield wiper fault indicator light: If these lights stay on or flash, it means the corresponding system has a fault, and the vehicle should be stopped immediately for inspection.
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Should You Engage the Gear or Release the Handbrake First When Starting a Car?

When starting a car, you should engage the gear first and then release the handbrake. If you are on an incline and release the handbrake first, the car will be in a neutral coasting state, causing it to slide in the direction of the slope without any braking, which can easily lead to a safety hazard. By engaging the gear first and then releasing the handbrake, the car will receive a force from the engine idle when in first gear, effectively preventing potential dangers. The sequence for parking is the opposite of starting: when parking, you should first apply the handbrake and then shift to neutral to ensure the car does not move. For automatic transmission cars, when parking, simply shift to P (Park) and then apply the handbrake.
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How long is the Audi Q5?

The length, width, and height of the Audi Q5 are 4629 millimeters, 1898 millimeters, and 1655 millimeters respectively, with a wheelbase of 2807 millimeters. The Audi Q5 is a mid-size SUV under the Audi brand. The Audi Q5 has been discontinued and replaced by the Audi Q5L. In terms of power: the Audi Q5 uses a 2.0-liter turbocharged engine, which has a maximum power of 230 horsepower and a maximum torque of 350 N·m. It is equipped with AVS variable valve lift system and hybrid injection technology, using an aluminum alloy cylinder block and cast iron cylinder block. The front suspension of the Audi Q5 uses a five-link independent suspension, and the rear suspension uses a trapezoidal link independent suspension. In terms of configuration: it is equipped with a full-time four-wheel drive system and uses a Torsen central differential.
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Is JETOUR produced by Chery?

JETOUR is a car produced by Chery. 1. As a new product series under Chery Holdings, JETOUR focuses more on travel+, with high appearance, large space, more intelligent, and good quality as the original intention of product development. It is designed for young people who refuse mediocrity and strive for progress, creating a personalized, exquisite, and suitable life companion. It provides the most reasonable solutions for more consumers in family travel. 2. JETOUR has continuously launched models such as JETOUR X70, JETOUR X70S, JETOUR X90, JETOUR X70SEV, and JETOUR X95. In 2020, JETOUR will launch several new models and facelifted models, including JETOUR X70M and JETOUR X70Coupe.
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What are the precautions for using automatic transmission vehicles?

Precautions for using automatic transmission vehicles: 1. Do not coast in neutral gear. When the automatic transmission is in N gear, mechanical heat dissipation stops, but the vehicle is still moving, and the transmission is also operating. Therefore, coasting in neutral gear can cause damage to it; 2. Do not shift to P gear before the vehicle comes to a complete stop. If the vehicle is shifted directly to P gear without stopping, the transmission will be affected by external pressure, which may lead to damage or gear jamming; 3. Do not always use D gear. Automatic transmission vehicles also have multiple gear settings. When climbing or overtaking, you can switch to L gear or S gear to obtain more power; 4. Do not shift to R gear before the vehicle stops. When the vehicle is moving, the transmission defaults to forward gear. Shifting to R gear at this time will cause an impact on the transmission, which will lead to damage over time.
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Does the 2020 Magotan Luxury Edition have ambient lighting?

2020 Magotan Luxury Edition is equipped with ambient lighting. Functions of ambient lighting: 1. Alter the appearance of car interiors at night, enhancing vehicle recognition; 2. Improve the interior ambiance with distinct functional zoning; 3. Emphasize the overall design lines and surfaces, giving the interior a three-dimensional effect and visually expanding the interior space. The 2020 Magotan Luxury Edition measures 4865mm in length, 1832mm in width, and 1471mm in height, with a wheelbase of 2871mm. It features full LED matrix headlights and full LED taillights, supporting dynamic turn signals for better recognition. The daytime running lights are redesigned from the bottom to the upper eyebrow, making them more delicate. The front grille is adorned with a dotted matrix pattern, connecting the headlights on both sides to the grille, visually widening the front face for a more pronounced effect.
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