The DIS (Direct Ignition) system has eliminated the rotary distributors that deliver the spark that ignites the cylinders. Instead, these systems use signals provided by the Camshaft Position Sensor (CMP) and Crankshaft Position Sensor (CKP) so that the Powertrain Control Module can determine the most appropriate ignition timing based on the engine load and speed. The igniter allows performing greater precision when starting the engine, as well as decreasing the loss of high voltage that greatly affects the life of these components.
The igniter provides a primary ignition signal to the cylinders that are connected to the coil. The PCM determines when this signal will be delivered. Once it is received by the igniter, it is sent to the primary winding of the coil for the appropriate cylinder. After this process, the igniter power transistors interrupt the signal so that a high voltage is created in the secondary winding of the coil.
When the P1310 OBD2 fault code is set, it is because the PCM has found that the ignition system has experienced a malfunction. This is because an ignition feedback signal (IGF) between the PCM and the igniter or Ignition Module is not present. Number 3 mentioned in this code refers to the ignition circuit on cylinder 3.