What is the reason for the non-functioning tachometer in the Rena?
3 Answers
The reasons for the non-functioning tachometer in the Rena are: 1. The car's tachometer is damaged; 2. The induction coil or sensor is damaged; 3. The tachometer needle is stuck. Taking the 2020 Rena as an example, it belongs to the small car category, with body dimensions of: length 4300mm, width 1705mm, height 1460mm, a wheelbase of 2570mm, a fuel tank capacity of 43l, and a curb weight of 990kg. The 2020 Rena features a MacPherson independent front suspension and a torsion beam non-independent rear suspension. It is equipped with a 1.4l naturally aspirated engine, delivering a maximum horsepower of 95ps, a maximum power of 70kw, and a maximum torque of 132.4nm, paired with a 5-speed manual transmission.
A few days ago, I encountered an issue with my Verna's tachometer not working—the needle was either stuck or completely unresponsive. This is a fairly common problem, most likely caused by a faulty RPM sensor, which is responsible for reading engine speed signals and transmitting them to the dashboard. In the Verna, the sensor is located on the side of the engine and is prone to dust buildup or aging failure. Another possible cause is loose or short-circuited wiring connections interrupting the signal. Dashboard failures themselves are rare, and a blown fuse is the easiest to fix—it's located in the cabin fuse box. Get it checked at a shop ASAP; a diagnostic scan tool can quickly confirm the issue. Don't delay, as this affects your ability to monitor engine conditions. Unnoticed high RPMs could damage the engine. Repairs aren't expensive—replacing the sensor typically costs around 200-300 RMB.
I've diagnosed numerous Verna tachometer issues during car repairs, mostly stemming from sensor failures. The sensor, located near the engine, collects crankshaft speed data. If contaminated by oil sludge or with damaged internal coils, signals won't reach the gauge. Aged wiring and corroded connectors are also culprits, causing open or short circuits. Blown fuses are highly probable—check the main fuse box for the instrument cluster fuse. Rare cases involve faulty gauge control modules. DIY test suggestion: Use a multimeter to check sensor output voltage, which should fluctuate with engine operation. Simple procedure, but don't tamper if unsure—visit a professional shop to avoid misdiagnosis. Non-functional tachometers pose serious risks, like missing shift timing on highways, potentially causing engine overheating and failure.
