What is the reason why the Roewe RX5 cannot start even with a jump start?
3 Answers
The reason why the Roewe RX5 cannot start even with a jump start is: the remaining charge in the car battery is too low, and the power is insufficient to start the car. Taking the 2020 luxury version Roewe RX5 as an example, its body length, width and height are: 4571mm, 1855mm, 1719mm, and the wheelbase is 2708mm. The 2020 luxury version Roewe RX5 front suspension is MacPherson independent suspension, the rear suspension is longitudinal trailing arm semi-independent suspension, it is equipped with a 1.5L turbocharged engine, the maximum horsepower is 173ps, the maximum power is 127kw, the maximum torque is 275nm, and it is matched with a 6-speed manual transmission.
I've encountered similar situations before. It's indeed quite tricky when the Roewe RX5 won't start even with a jump. The battery itself might be completely dead, especially for old batteries over three years old - their internal resistance increases after deep discharge, making it impossible to charge through jumping. Worn starter motor brushes or faulty solenoid switches are also common causes; you might hear clicking sounds but the engine just won't turn over. Another possibility is a clogged fuel system where carbon buildup in the injectors prevents gasoline from spraying. Timing chain skipping teeth is another hidden danger - my colleague's car had this issue last week, with just the starter motor spinning freely. The most troublesome case is when the ECU crashes, especially if improper jump-starting in rainy weather burns the module. I'd suggest first disconnecting the negative battery terminal for ten minutes to reset the system.
When helping a friend with this situation last time, I noticed several key points. The most easily overlooked issue is the poor contact caused by loose jumper cable clamps—the copper clamps must be firmly attached to the metal part of the battery terminal, avoiding any painted surfaces. The rescue vehicle needs to press the accelerator to maintain 2000 RPM for three minutes to charge effectively; many people fail by attempting to start the car immediately after connecting the cables. Additionally, check the battery's inspection window—if it turns black, it indicates an internal short circuit, meaning the battery needs replacement. Starter wiring can age and suddenly lose power, especially near high-temperature turbo areas where it becomes brittle. A faulty alternator rectifier can also drain power, causing a new battery to lose charge instantly. The anti-theft system might mistakenly lock and refuse to start, so try the spare key a few more times. If all else fails, use a diagnostic tool to check for error codes.
