Checking Electrical Components

From BMW E34 Encyclopedia

Overview[edit]

List of electrical Ohm, V, and VDC values for the common components for quick troubleshooting.

Internal Sensors[edit]

  • The camshaft sensor: 1280 +/- 10% Ohm
  • The crankshaft sensor, terminal #1 and #2: 500 Ohm

Coolant + Air Temperature Sensors[edit]

  • 14F: 7-11 Ohm
  • 78F: 2.1-2.9 Ohm

Throttle Position Sensor (TPS)[edit]

  • Ignition on:
    • Terminal #1 and the ground: 5 VDC
  • Ignition off:
    • Terminal #1 and #3: 4K Ohm
    • Full throttle terminal #1 and #2: 1-4K Ohm

Idle Valve Control (ICV)[edit]

  • Terminal #1 and #2: 12 +/- 2 Ohm
  • Terminal #2 and #3: 12 +/- 2 Ohm
  • Terminal #1 and #3: 23 +/- 4 Ohm

Battery[edit]

  • Iginition off. Between the negative and positive terminal: 12.2V+