Place one probe on one connector pin and the other probe on the injector body. Set your multimeter to continuity or Ohms. Neither should be connected to the casing (Earth or “-“). The two technologies are not compatible a solenoid injector cant replace a piezo injector and vice versa. Solenoid injectors operate at 160 microseconds, and piezo injectors operate at 100 microseconds. The piezo socket on the injector has TWO pins. The difference between the two injectors is the speed and precision with which they inject diesel fuel. As this is the bit that normally fails, it is worth checking. You can’t test an injector for function but you can check the Piezo valve wiring. Pull off, test and replace connectors until you find the dud injector. If it starts and runs on three cylinders, you have found the dud injector. Solenoid-controlled injectors have non-return valves and springs, which causes inertia in its operation. There are two types of injectors: electromagnetic injectors, which allow for injection of 5 parts fuel and piezoelectric injectors, in which the dose can split up to 7 parts. E-mail address: baitimerovrmsusu.ac.ru 2015 The Authors. The injector is a critical part of the modern injection system. This paper is devoted to modeling of common rail piezo injector from Bosch. Pull the connector off an injector and start the engine. Now, one of the most perfect of FIS is common rail fuel injection system with piezoelectric indirect-acting injector. The engine will cut out instantly and will not restart.Ī VCDS or similar scan may give a fault code of:ġ7448 P1040 - Supply fuel injector(s) A, electrical malfunction in circuitġ8578 P2146 - Supply Voltage for Fuel Injector Group A, Open Circuitġ8579 P2147 - Supply Voltage for Fuel Injector Group A, Short to Groundġ8580 P2148 - Supply Voltage for Fuel Injector Group A, Short to B+ġ7447 P1039 - Supply fuel injector(s) A, shorted The piezoelectric injection-system provides a reliable approach for precise small-quantity fuel injection due to its fast, dynamic response. No injectors are included in the sale, this is a service to your Piezo injectors. Rather than risk damage to the ECU when one “shorts”, the ECU switches them all off. We are an injector testing facility all injectors arrive by hand or courier. The Piezo valve voltage signals are 100 -200V. The internal piezo wiring seems to burn out and short to the casing. Piezo injector failure seems mostly due to an internal electrical fault in the Piezo valve. Our process restores the crystal (Piezo) stack to its original dimensions and performance. Varying pressure, heat and voltages are used on our test equipment to replicate the conditions the injector was designed to operate under. These injectors are always held in by two bolts. Injector Nozzle ALLA140PM0019 & M0019P140 for Injector 5WS40745 & BK2Q-9K546-AG China made new diesel injector piezo valve for 115 116 117 series injectors. By operating the injector under specific operating conditions, Injector-Rehab is able to regenerate the Piezo Stack. Other than this, Piezo and Solenoid injectors look similar, with the injector nozzle looking like a fat nail and the pump looking like a valve spring. ![]() ![]() The electrical connector on a Piezo injector faces upwards and not sideways like a Solenoid injector.
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