Speed sensor <em>Nissan Almera N16</em>: diagnostics, replacement and common errors

Nissan Almera N16 - a popular sedan of the early 2000s, which is still actively used on the roads of the CIS. One of the weak points of the model is speed sensor (DSA), whose malfunction leads to malfunctions of the speedometer, ABS and even the engine. In this article, we will look at how to independently diagnose and replace the sensor without contacting a service center.

Problems with the speed sensor on Almera N16 often disguised as other malfunctions: floating speed, jerking during acceleration or burning CHECK ENGINE. At the same time, many owners drive for years with a non-working speedometer, not suspecting that the culprit is a tiny sensor costing from 800 rubles. We will tell you how to avoid common mistakes when replacing and save on diagnostics.

Where is the speed sensor located on Nissan Almera N16?

Speed sensor on Almera N16 (body N16, B10) located on gearbox - in the upper part of the crankcase, next to the speedometer drive. The exact location depends on the type of checkpoint:

• 🔧 Manual transmission (FS5R30A): the sensor is screwed into the box body from the passenger compartment side, closer to the engine shield. Access is possible from under the hood or from the pit.
• ⚙️ Automatic transmission (RE4F03A): The DSA is installed on the hydraulic unit, access to it is difficult - the removal of the air duct and part of the attachments is required.

On vehicles with ABS The speed sensor is integrated into the brake control system, so its failure may trigger an error C1130 (mismatch between wheel sensor and DSA signals). Externally, the sensor is a plastic cylinder with a metal rod and a 3-pin connector.

Important! On models after 2003, the sensor may have a different connector (round instead of rectangular). Please check visually or by VIN before purchasing.

Signs of a malfunctioning speed sensor

Faulty speed sensor on Almera N16 manifests itself in different ways - from a harmless “dead” speedometer to serious problems with the engine. Main symptoms:

• 🚗 Speedometer doesn't work or shows incorrect values (for example, 0 km/h when driving). The arrow may twitch or freeze.
• ⚠️ Lit CHECK ENGINE with errors P0500 (no DSA signal) or P0503 (intermittent signal).
• 🔄 Jerks when moving at low speeds (especially noticeable on an automatic transmission - the gearbox is “stupid” when shifting).
• 📉 Floating speed at idle (the ECU does not receive speed data and adjusts the fuel supply incorrectly).
• 🚨 Cruise control fails (if installed) or system ABS triggers for no reason.

On Almera N16 with automatic transmission a faulty DSA can lead to emergency mode of the box (lights up AT on the dashboard, gears do not shift above 3rd). This is because the transmission ECU uses the sensor signal to lock up the torque converter.

⚠️ Attention: If the speedometer works, but errors are on P0500/P0503, the problem may not be in the sensor, but in a broken wiring or oxidation of the contacts in the connector. Before replacing the DSA, check the circuit with a multimeter!

How to check the speed sensor for Nissan Almera N16

Diagnostics of the speed sensor can be carried out without removing it - all you need is a multimeter and basic electrical skills. Verification algorithm:

1. Removing the connector: Disconnect the block from the sensor (press the lock and pull up). On a manual transmission, access is more convenient from the pit, on an automatic transmission - from the battery side.
2. Chain continuity: Turn on the ignition and check the voltage between the contacts 1 (+) And 3 (mass) on the connector. Must be 12 V (powered by ECU). Lack of voltage indicates a break or malfunction of the control unit.
3. Signal check: Connect a multimeter in voltmeter mode to the contacts 2 (signal) And 3 (mass). When the drive wheel rotates (the car is on a jack), the voltage should vary from 0.5 V to 5 V.

If there is no voltage at the signal contact or is constantly equal to 0/5 V, the sensor is faulty. You can also check the resistance of the DSA winding (standard: 500–1500 Ohm).

Alternative method: If you don’t have a multimeter, temporarily install a known-good sensor (you can borrow it from friends or in a store “for testing”). If the problem disappears, buy a new DSA.

Articles and analogues of the speed sensor for Almera N16

Original speed sensor for Nissan Almera N16 has an article number 39200-4M000 (for manual transmission) and 39200-4M005 (for automatic transmission). However, the original is expensive (from 3,500 rubles), so owners often choose analogues:

When choosing an analogue, pay attention to:

• 🔌 Connector type: on Almera N16 before 2003 - rectangular, after - round.
• 📏 Rod length: on an automatic transmission the rod is shorter than on a manual transmission (if there is an error, it may hit the gearbox housing).
• 🔄 Contact polarity: on some Chinese analogues + And signal swapped places.

⚠️ Attention: Sensors for Almera N16 And Nissan Primera P12 externally identical, but have different calibrations! Installing a “foreign” DSA will lead to an underestimation of the speedometer readings by 10–15%.

Step-by-step instructions for replacing the speed sensor

Replacing the sensor with Almera N16 with manual transmission takes 20–30 minutes, automatic - up to 1 hour due to difficult access. You will need:

• 🔧 Key on 10 mm or head with extension.
• 🧤 Gloves (the sensor is installed in the oil contact area).
• 🧴 WD-40 (if the sensor is “stuck” to the gearbox housing).

Work procedure for manual transmission:

1. Remove the negative terminal from the battery.
2. Disconnect the sensor connector (press the lock and pull up).
3. Key on 10 mm unscrew the sensor counterclockwise. If it doesn't work, spray it WD-40 and wait 5 minutes.
4. Install the new sensor, having first lubricated the threads with graphite lubricant (not lithol!). Tighten without force - the DSA body is plastic!
5. Connect the connector and check the speedometer while driving.

Typical replacement mistakes:

• ❌ Dragging the sensor - leads to housing cracks and oil leakage from the gearbox.
• ❌ Using sealant on the thread - it can get inside the sensor and damage it.
• ❌ Confusion with connectors: on some models, a reverse sensor is located next to the DSA (has 2 contacts instead of 3).

Frequently asked questions and problems after replacement

Even after correctly replacing the sensor, owners Almera N16 face nuances. Let's consider typical situations:

1. The speedometer does not work, but there are no errors: Check the fuse F10 (10 A) in the cabin unit - it is responsible for powering the DSA. Also inspect the wiring from the sensor to the ECU (it often rubs against the gearbox housing).
2. Error P0500 stayed: Clear errors with a scanner or by disconnecting the battery. If the error returns, the problem is in the ECU or the power circuit.
3. Jerking during acceleration has not disappeared: The automatic transmission requires adaptation of the box (can be done through Nissan Consult or universal scanner Launch).

If after replacing the sensor there are extraneous noise on the gearbox side, you probably damaged the plastic rod during installation. In this case, the sensor must be replaced - it cannot be repaired.

FAQ: Answers to popular questions