No spark on Nissan Largo: complete diagnostics and repair

Nissan Largo - a minivan that has gained popularity due to its reliability and practicality, but even it has problems with the ignition system over time. Lack of spark is one of the most critical faults, leading to complete engine failure. Unlike modern cars with advanced self-diagnosis systems, Diagnosing no spark on Largo requires manual testing each element of the chain: from spark plugs to the electronic control unit (ECU).

In this article we will analyze all possible reasons for loss of spark - from banal wear of spark plugs to complex breakdowns of the distributor or ignition coil. We will pay special attention unique features of Largo with engines GA16DE And SR20DE: their ignition system is sensitive to the quality of contacts in the crankshaft position sensor (CPS) connectors, which often becomes a “weak link” after 150,000 km.. You will also find step-by-step instructions with photographs of key components, tables of coil and sensor resistances, and answers to frequently asked questions from owners.

Signs of no spark on Nissan Largo

The first signal of a problem is the engine won't start at all or works intermittently, “troits”. But there are also indirect signs that will help narrow down the troubleshooting range:

• 🔋 The starter turns, but the engine does not “catch” even for a short time - this indicates complete lack of spark in all cylinders.
• 🔥 The engine starts after several attempts, but immediately stalls - possible unstable spark due to poor contact or overheating of the coil.
• ⚡ The light on the dashboard is on CHECK ENGINE, but the scanner does not show errors (typical of problems with distributor or DPKV).
• 💨 The exhaust pipe smells like gasoline - the fuel does not burn due to the lack of a spark.

If at least one of these symptoms occurs, start diagnostics immediately. On Nissan Largo with injection engines (GA16DE, SR20DE) most often to blame:

• 🔌 Ignition coil or high-voltage wires;
• 📡 Crankshaft position sensor (CPS);
• ⚙️ Distributor (ignition distributor);
• 🖥️ Electronic control unit (ECU).

Step-by-step diagnostics: where to start?

The troubleshooting algorithm depends on the engine type. On carburetor Largo versions (CA16DE, CA18i) the ignition system is simpler - there is no computer, and the problem usually lies in the distributor or coil. On injection models (GA16DE, SR20DE) diagnosis is more difficult due to dependence on electronic sensors.

The first step is to check for spark.. To do this:

1. Remove the high voltage wire from any spark plug.
2. Insert into the wire lug obviously working candle (a new one is possible).
3. Press the metal part of the spark plug against the engine ground (for example, the valve cover).
4. Have a helper crank the starter for 2-3 seconds.

If there is no spark at any spark plug, the problem is common part of the ignition system (coil, distributor, ECU). If there is a spark only on some cylinders, the fault is spark plugs, wires or individual coils (on models with SR20DE).

Checking the ignition coil and high-voltage wires

Ignition coil on Nissan Largo - one of the most vulnerable elements. On injection models, it often fails after 100,000–150,000 km due to overheating or corrosion of the contacts. How to check:

1. External inspection: cracks on the housing, traces of melting or corrosion on the terminals - a sign of a malfunction.
2. Resistance check:
   • Primary winding (contacts 1 And 15): 0.5–1.5 Ohm.
   • Secondary winding (contact 15 and high voltage output): 8–12 kOhm.

Checking for spark: Connect the coil directly to the battery (contact 15 to "+", 1 to “–”) and briefly close the circuit. A spark should jump between the high-voltage terminal and ground.

High-voltage wires are checked with a multimeter in resistance mode. Normal values for Largo:

Wire length	Resistance, kOhm
Short (1–2 cylinder)	4–8
Medium (3 cylinder)	6–10
Long (4 cylinder)	8–12

If the wire resistance is higher than 15 kOhm or tends to infinity, it needs to be replaced. Important: on Largo with SR20DE wires often “break through” near the tips, so inspect them in the dark with the engine running (microflares will be visible).

Crankshaft position sensor (CPS) - the “invisible” reason for the lack of spark

On injection Nissan Largo (GA16DE, SR20DE) DPKV - main sensor for spark formation. If it is faulty or the signal is interrupted, the ECU does not “understand” when to fire the spark and the engine will not start. In this case:

• ⚡ CHECK ENGINE may not light up (especially on earlier versions of the ECU).
• 🔧 The OBD-II scanner often does not show an error on DPKV (a diagnostic scanner is needed Nissan Consult).

How to check DPKV:

1. Remove the sensor (located next to the crankshaft pulley).
2. Test the winding with a multimeter: the resistance should be 500–700 Ohm.
3. Check the integrity of the shielded wire (it often rubs against the brackets).
4. Inspect the toothed disk on the crankshaft - chips or contamination with metal shavings disrupt the signal.

Critical nuance: on Largo with SR20DE DPKV is sensitive to the gap between the sensor and the disk. Normal clearance - 0.5–1.2 mm. If it is larger, the signal will be weak and the ECU will not generate a spark..

What to do if the DPKV is working, but there is no spark?

The problem may be in the ECU or the sensor's power circuit. Check the voltage at the DPKV connector (pin 1 - +12V, pin 2 - ground). If there is no power, look for an open in the wiring harness or a faulty fuse. EFI (10A) in the block under the hood.

Distributor: mechanical and electrical faults

On carburetor versions Nissan Largo distributor is a key component of the ignition system. Even on injection models, it is responsible for distributing the spark among the cylinders. Typical breakdowns:

• 🔧 Wear of the distributor shaft bearing (the play can be felt by hand when rocking).
• 🔥 Contacts burning slider or distributor caps.
• 📉 Malfunction of the Hall sensor (on injection models).
• 🔄 Broken ignition timing (checked with a strobe light).

Distributor diagnostics:

1. Remove the distributor cover and inspect it for cracks or signs of breakdown (dark tracks).
2. Check slider — carbon deposits or chips on the contact indicate a malfunction.
3. On injection models, check the Hall sensor:

   1. Подключите мультиметр к среднему и любому крайнему контакту разъёма датчика.
   2. Вращайте вал трамблёра рукой — напряжение должно скакать между 0 и 12В.

If the distributor is faulty, it is easier to replace it as an assembly. On Largo with GA16DE suitable distributor from Nissan Primera P10 (number 22430-4M000).

Electronic control unit (ECU) and power circuits

If all previous checks have failed, the problem may lie in ECU or its power circuits. On Nissan Largo with GA16DE/SR20DE The ECU is located under the glove compartment or behind the center console. Symptoms of ECU malfunction:

• 🚨 The engine does not start, but there is a spark on all cylinders (the ECU does not give the command for fuel injection).
• 🔌 Fuse EFI (10A) constantly burns out.
• 📶 There is no voltage +12V or “ground” on the ECU connector.

Check procedure:

1. Check the fuse EFI and relay ECCS (located in the block under the hood).
2. Measure the voltage at the contacts A10 (mass) and B1 (+12V) ECU connector.
3. Inspect the connector for oxidation or broken contacts (especially contacts A26 And A27, responsible for the DPKV signal).

If the ECU is faulty, it can be repaired (resoldering the capacitors) or replaced with a used one with the same firmware. Important: When replacing the ECU it may be necessary immobilizer adaptation (on models after 1995).

Additional reasons: from immobilizer to alarm glitches

Sometimes the spark disappears due to external systems, not directly related to ignition. Common cases:

• 🔐 Immobilizer blocks startup (on models after 1996). Check if the immo lamp on the instrument panel is flashing.
• 🚗 Alarm with ignition interlock function (especially systems StarLine or Alligator). Try turning it off with the emergency button.
• 🔋 Discharged battery (voltage below 11.5V). The ECU and ignition coil require stable power.
• 🌡️ Engine overheating (at SR20DE The ECU turns off the ignition at temperatures above 120°C).

If you suspect an immobilizer, try starting the engine spare key or turn off the immobilizer during diagnostics (on some models it is enough to remove the chip from the key and bring it to the antenna ring around the ignition switch).

⚠️ Attention: On Nissan Largo with alarm StarLine A91 The ignition interlock is implemented through a relay in the coil circuit. If a spark appears after turning off the alarm, the problem is in its module or wiring.

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

Is it possible to drive without spark on one cylinder?

Technically possible, but highly not recommended. Lack of spark in one cylinder leads to:

• Increased fuel consumption (up to 30%).
• Overheating of the catalyst (unburned fuel burns out in the outlet).
• Accelerated wear of the piston group due to gasoline getting into the oil.

On Largo with SR20DE long movement “on three cylinders” can damage the lambda probe.

How to check spark plugs without a tester?

The “spark” method (described above) is suitable, but be careful:

• Use dielectric gloves or a tool with insulated handles.
• Do not hold the candle with your bare hands - the voltage on the coil is up to 40,000V!
• If the spark is weak (barely noticeable), the problem is in the coil or wires.

What should I do if there is no spark after replacing the coil?

Possible reasons:

1. Incorrect connector connection (contacts are mixed up 1 And 15).
2. Malfunction of the new unit (check the resistance of the windings).
3. The ECU does not “see” the coil due to a break in the control circuit (contact IGT on the ECU connector).

On Largo with GA16DE After replacing the coil, you may need to reset the ECU errors (disconnect the battery for 5 minutes).

Why is there a spark, but the engine does not start?

In this case, the problem is not in the ignition, but in:

• 🔥 Fuel system (the fuel pump does not work, the injectors are clogged).
• 🌡️ Temperature sensor (The ECU receives incorrect data and over-riches the mixture).
• 🔄 Misaligned timing phases (check the marks on the pulleys).

Check the pressure in the fuel rail (standard for SR20DE - 3–3.5 bar).

Where to buy spare parts for the Largo ignition system?

Original spare parts:

• Ignition coil - 22448-4M000 (for GA16DE).
• Distributor - 22430-4M000 (suitable from Primera P10).
• DPKV - 23731-4M000.

Analogs (budget options):

• Coil - Bosch 0 221 504 015.
• Wires - NGK RC-JE8.

For carburetor models, spare parts from Nissan Sunny N14 (distributor 22430-6J000).