Checking Electrical Components
From E34 Addicts
Contents |
Overview
List of electrical Ohm/V/VDC values for common components for quick troubleshooting.
Internal Sensors
- Cam shaft: 1280 +/- 10% ohm
- Crank shaft: Terminal 1-2 500 ohm
Coolant + Air Temperature Sensors
- 14F: 7-11 ohm
- 78F: 2.1-2.9 ohm
Throttle Position Sensor (TPS)
- Ignition on: 1 and ground = 5 VDC
- Ignition off 1-3: 4.0K ohm; full throttle 1-2: 1.0-4.0K ohm
Idle Valve Control (ICV)
- Terminal 1-2: 12 +/- 2 ohm
- Terminal 2-3: 12 +/- 2 ohm
- Terminal 1-3: 23 +/- 4 ohm
Battery
- Ground + Live: 12.2V+ (ignition off)