No spark on Nissan Sunny: 7 reasons and how to fix the problem

No spark on Nissan Sunny - one of the most insidious malfunctions that can immobilize the car at the most inopportune moment. Unlike problems with the fuel system, where at least the starter turns, here the engine simply refuses to show signs of life. But don’t rush to call a tow truck or take the car to a service station: in 80% of cases, the problem can be diagnosed and fixed on your own, with a minimum set of tools.

In this article we will look at all possible reasons for lack of spark on Sunny (including models B13, B14 And B15 with carburetor and injector), from trivial (blown fuse) to complex (ECU malfunction). You will learn how to check the ignition coil with a multimeter, where to look for breaks in the wiring, and why sometimes it is not the distributor itself that is to blame, but its Hall sensor. And at the end - step by step instructions with photos and connection diagrams.

1. Symptoms of no spark: how to accurately diagnose the problem

Before disassembling half of the car, make sure that the problem is in the ignition system. Here key features, which will confirm the absence of a spark:

• 🔧 The engine does not start even after a long rotation of the starter (no “pops” in the exhaust pipe).
• 💡 Lights up or flashes on the dashboard CHECK ENGINE (on injection models).
• 🔋 The starter turns vigorously, but the fuel does not ignite (check the presence of gasoline!).
• 🔥 There is no characteristic smell of gasoline from the exhaust pipe (fuel does not burn).

If any of these symptoms match, proceed to checking the spark. To do this:

1. Remove the high voltage wire from any spark plug.
2. Insert into the wire lug obviously working candle (or a new one).
3. Press the metal part of the spark plug against the “ground” (for example, against the cylinder head).
4. Have a helper turn the starter and watch for a spark.

⚠️ Attention: Never hold a candle in your hand while checking! The voltage in the ignition system can reach 30,000 volts - this is deadly. Use dielectric gloves or pliers with insulated handles.

If there is no spark on any spark plug, the problem is in the general elements of the system (coil, distributor, ECU). If there is a spark only on some spark plugs, the high-voltage wires or individual coils are to blame (on models with DIS).

2. Ignition coil: how to check and replace

The ignition coil is the most vulnerable element of the system. On Nissan Sunny it may fail due to overheating, short circuit or normal wear and tear. You can check it in two ways:

Method 1: Visual inspection

• 🔍 Check the integrity of the coil body: cracks or melting indicate an internal breakdown.
• 💧 The presence of oil or moisture inside is a sign of leakage.
• 🔌 Oxidized or burnt contacts on the terminals.

Method 2: Check with a multimeter

To test, remove the coil and measure the resistance:

Contacts	Normal resistance	Cause of malfunction
Primary winding (+ And -)	0.5–1.5 Ohm	Open or short circuit
Secondary winding (+ and high voltage output)	6–15 kOhm	Insulation breakdown
Between the body and any terminal	∞ (infinity)	Ground fault

If the readings are outside the normal range, the coil needs to be replaced. On Sunny fit original Nissan 22430-4M000 or analogues from Bosch, Denso. The average price is 2,500–4,000 rubles.

⚠️ Attention: On injection models, after replacing the coil, it may be necessary to reset errors in the ECU. Use a scanner ELM327 or disconnect the battery for 10 minutes.

Remove the coil from the car|Clean the contacts from oxidation|Check the resistance with a multimeter|Compare the readings with the norm|Install a new coil if there is a malfunction-->

3. Distributor and Hall sensor: hidden culprits

On carburetor Nissan Sunny (and some early injection engines) the distributor is responsible for spark distribution. If the coil is good, but there is no spark, the problem may lie here.

How to check the distributor:

1. Remove the distributor cap and inspect it for cracks or carbon deposits.
2. Check status slider — it should not have chips or traces of breakdown.
3. Measure the gap between the breaker contacts (for Sunny — 0.35–0.45 mm).

Hall sensor: invisible fault

The Hall sensor in the distributor often fails without external signs. You can check it like this:

1. Disconnect the sensor connector (3 wires: +5V, GND, signal).
2. Turn on the ignition and measure the voltage between +5V And GND - must be 4.8–5.2 V.
3. Rotate the distributor shaft by hand: 0–5 V (use an oscilloscope or multimeter in frequency measurement mode).

If there is no signal, the sensor is faulty. Replacement will cost 800–1,500 rubles (original Nissan 23731-4M000).

What to do if there is no replacement for the Hall sensor?

A temporary solution is to clean the sensor contacts with alcohol and check the solder connections. Sometimes heating with a hairdryer (temperature ~60°C) helps, but this will only delay the replacement by 1–2 weeks.

4. ECU and wiring: when the problem is deeper

If the coil and distributor are working properly, but there is still no spark, the culprit may be electronic control unit (ECU) or breaks in the wiring. On Sunny with an injector, the ECU is responsible for generating a signal to the coil, and its failure leads to a complete lack of spark.

How to check the ECU:

• 🔌 Check the ECU fuse (usually 10A, located in the block under the hood).
• 💡 Measure the voltage at the ECU power contacts: there should be 12 V (contact +B) and 5 V (contact +5V).
• 📡 Check the “mass” of the block - it often oxidizes at the junction with the body.

If the ECU does not send a signal to the coil (check with an oscilloscope on the contact IGT), it will have to be reflashed or changed. The cost of a new unit is from 5,000 rubles, used – 2,000–3,000 rubles.

Wiring check:

Breaks or short circuits in harnesses are a common problem in Sunny over 10 years old. Please note:

• 🔥 Wires from the ECU to the coil (often rub against the intake manifold).
• 🔌 Crankshaft position sensor connector (oxidized or loosened).
• 🛠️ The harness is near the distributor - the wires there often break due to vibration.

⚠️ Attention: On Nissan Sunny B14 with engine GA15DE The “mass” of the ECU under the dashboard often rots. The sign is a chaotic loss of spark during vibration. Solution: solder a new ground wire to the body.

5. Crankshaft position sensor (CPS): why the engine “does not see” a spark

On injection Sunny The crankshaft position sensor (CPS) is a critical element. If it's faulty, the ECU doesn't know when to fire and simply blocks it. Symptoms:

• 🚗 The engine does not start, but the starter turns.
• 💡 Lights up on the dash CHECK ENGINE.
• 🔧 When scanning errors, a code appears P0335 or P0336.

How to check DPKV:

1. Remove the sensor (located next to the crankshaft pulley).
2. Measure the resistance between the terminals: it should be 500–700 Ohm.
3. Check the inductance (if you have an LCR meter): normal - 200–400 mH.

If the sensor is faulty, replace it (original Nissan 23731-AL500, price ~1,200 rubles). When installing, maintain the gap between the sensor and the pulley - 0.5–1.5 mm.

6. Fuses and relays: trivial but common reasons

Sometimes the lack of a spark is due to a banal fuse blown or a relay failure. On Sunny The following are responsible for the ignition system:

element	Denomination	Location	Symptoms of a problem
fuse IGN	10A	Fuse box (interior, under steering wheel)	No power to coil
Ignition relay	—	Relay block (under the hood, next to the battery)	Clicks when turning the key, but no spark
fuse ECU	10A	Fuse box (interior)	The ECU does not work, there is no signal to the coil

How to check:

1. Visually inspect the fuses for broken threads.
2. Test the relay with a multimeter: between contacts 85 And 86 there must be resistance 50–120 Ohm.
3. Replace the suspicious relay with a known working one (for example, from a cooling fan).

If the fuse burns again after replacement, there is a short circuit in the circuit. Look for a problem in the wiring from the coil to the ECU.

7. Troubleshooting algorithm: where to start?

To avoid wasting time, follow this diagnostic procedure:

1. Check the presence of fuel and the serviceability of the starter (there will be no spark if the engine does not turn).
2. Make sure fuses and relays are good (see section 6).
3. Check the ignition coil (section 2).
4. Diagnose distributor and Hall sensor (section 3).
5. Check the wiring from the ECU to the coil (section 4).
6. Check DPKV (section 5).
7. Use a scanner to read ECU errors. (if there is CHECK ENGINE).

In practice, in 60% of cases the coil or distributor is to blame, in 20% it’s the wiring/ECU, in 15% it’s the DPKV, and only 5% it’s the fuses/relays.

FAQ: Frequently asked questions about lack of spark on Nissan Sunny

Is it possible to drive without spark on one cylinder?

No, if there is no spark at all (on all spark plugs), the engine will not start. If the spark is lost on only one cylinder (for example, due to a faulty high-voltage wire), the engine will run, but with severe vibration and loss of power. You cannot drive in this mode for a long time - this leads to overheating of the catalyst and increased fuel consumption.

Why did the spark disappear after washing the engine?

Most likely, water got into the distributor, ignition coil or ECU contacts. Dry all elements with a hairdryer (do not use a compressor - you can damage the sensors!). Pay special attention to the Hall sensor connector - it often collects moisture. If the problem persists after drying, check the circuits for short circuits.

Which ignition coil is better to install on the Sunny B14?

For Nissan Sunny B14 with engine GA15DE fit:

• Original: Nissan 22430-4M000 or 22430-4M001.
• Analogues: Bosch 0 221 504 478, Denso 550-0104.

Among the budget options, reels have proven themselves well ERA 550478 (about 1,800 rubles). Avoid cheap Chinese fakes - they often fail after 1-2 months.

Could a faulty alternator cause no spark?

Yes, but indirectly. If the generator does not charge, the voltage in the on-board network drops below 11.5 V, and the ECU goes into emergency mode, blocking the spark. Check the battery voltage with the engine running (should be 13.8–14.4 V). If the generator is faulty, the spark may disappear periodically, especially when powerful consumers (headlights, stove) are turned on.

How to check high-voltage wires without a multimeter?

In the dark, start the engine and look at the wires: if they “break through”, you will see bluish discharges (sparks) on their surface. You can also use a spare wire: replace the standard wires with it one by one. If after replacing one of them a spark appears, the culprit has been found. Normal resistance of high voltage wires for Sunny — 5–10 kOhm per meter of length.