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INJECTOR DRIVER MODULE (IDM) OPERATION [MZR-CD (RF Turbo)]

BME014018701T03
• The IDM amplifies the battery positive voltage input from the PCM control relay into high voltage of more than approximately 50 V via the high voltage generating circuit, and outputs it to the fuel injectors as a fuel injector drive signal.

1 | IDM
2 | High voltage generator
3 | Control circuit
4 | Battery positive voltage (from PCM control relay)
5 | Injection signal No.1 (from PCM)
6 | Injection signal No.4 (from PCM)
7 | Injection signal No.2 (from PCM)
8 | Injection signal No.3 (from PCM)
9 | Injection confirmation signal (to PCM)
10 | Fuel injector No.1
11 | Fuel injector No.4
12 | Fuel injector No.2
13 | Fuel injector No.3

• When fuel injection signals are input from the PCM to the IDM, the IDM drives the fuel injectors at high voltage and starts injector operation for a short interval. When the fuel injectors start operating, the IDM maintains a constant current.
• While the fuel injectors are operating, the IDM detects the fuel injector drive current and outputs fuel injection confirmation signals (injector operating status) to the PCM.

1 | Injection confirmation signal (to PCM)
2 | Injection signal (from PCM)
3 | Fuel injector drive current
4 | Holding current switching time
5 | Holding current control value
6 | Fail signal (High side)
7 | Fail signal (Low side)