Poor wiring connections are a very common fault on the Nissan ECCS system. Clean the terminal and multi-plug connections and ensure that the terminals are making good contact. Tighten the male and female round terminals to ensure a good, clean and tight connection.
Low battery voltage will cause a non-start situation. Check the battery, the battery terminals and the fusible links for corrosion and bad connections.
Battery voltage above 9.6 volts during cranking is essential on Nissan cars. Lower voltage may prevent the ECU from actuating the injector.
A poor battery can cause spurious fault codes.
The battery is susceptible to failure due to high engine compartment temperatures. Cranking voltage should be 10.0 volts minimum. If the voltage is borderline, the battery is suspect.
Check the alternator output at 2500 rpm. Output should be 40 amp minimum and voltage should be 13.8 to 14.2 volts.
Check for distributor rotation. If no rotation, suspect a broken timing belt. A broken timing belt may cause valve damage in Nissan engines.
Check for fault codes. The code may be set by the component causing the no start.
Check for poor injector earth on inlet manifold near throttle body.
A poor connection at the injector is also very common. Clean the connection & ensure that the terminals are making good contact. Tighten the terminals to ensure a good connection.
Inspect the ECU earth connections on the inlet manifold. Tighten & clean as required. Suspect an AFM fault if the engine starts & runs rich or starts & then stalls. At normal operating temperature the engine may run quite well.
The CAS signal may be affected by oil, dirt or distributor bushing wear.
Excessive oil in the distributor may obstruct the CAS signal and create an intermittent problem.
Check that the CAS shield is installed under the rotor arm. A missing shield could cause the CAS signal to be affected by the spark jumping the rotor gap.
Broken wires and corroded connections in the ECU to CAS wiring are common faults. Failure of the CAS often occurs intermittently and more often when the engine is hot. The CAS is not available as a separate component to the distributor.
Poor quality replacement ignition components may cause lack of spark due to poor insulation.
The distributor cap and rotor are particularly susceptible to problems and the vehicle manufacturer’s own spare parts should be used where problems with proprietary brands are experienced.
Intermittent spark problems can often be traced to corroded or poor connections at the amplifier or coil. Check the connections for corrosion and clean as required.
The bushing may need replacement on high mileage vehicles.
Check for corroded connections. Clean and tighten to improve contact. Inspect the AFS. Renew the AFS if damaged by water ingress or rust is evident.
Broken harness wires or poor connections at the ECU are common.
A faulty ISCV can allow exhaust fumes to filter into the AFS casing and lead to plugging of the air filter element. Renew the ISCV if damaged by water ingress or rust is evident.
The OS is susceptible to deposits and contamination that may affect its operation. OS switching may occur at a slower than normal rate.
Loose OS connections and poor wiring to the ECU are common faults. If all other sensors are in range, OS replacement may correct mixture control problem.
