| 4.1 | Normal Power Supply Voltage Test |
| 4.2.1 | Voltage Fluctuation Under Electric Load (Waveform 1-1) |
| Voltage Fluctuation Under Electric Load (Waveform 1-2), 12VDC | |
| Voltage Fluctuation Under Electric Load (Waveform 1-2), 14VDC | |
| Voltage Fluctuation Under Electric Load (Waveform 1-3), 12VDC | |
| 4.2.2 | Voltage Fluctuation upon Engine Starting (Waveform 2-1), 12VDC |
| Voltage Fluctuation upon Engine Starting (Waveform 2-2), 12VDC | |
| 4.2.3 | Keeping Memory Contents (clocks and displays), 12VDC |
| 4.3.1 | Battery Power Supply Chattering Test (Waveform 3-1), 12VDC |
| 4.4 | Supply Voltage Reverse Connection Test |
| 4.6 | Supply Power Supply Instantaneous Interruption |
| 4.7.4 | Transient Voltage Impression Test, 12VDC |