Pointer Instruments And Moving-Disc Indicators: Construction
WARNING: This page is about a different car, the 2005 BMW 645Ci and 2004 BMW 645Ci. However, it is still accessible from the selected car via links, so may be relevant.
The instrument cluster has a total of 6 step motors for the various instruments.
For the first time, moving-disc instruments are used in the instrument cluster.
On the left, the set speed for cruise control is displayed on a moving-disc instrument.
On the right, a moving-disc instrument shows the engine-revolutions advance-warning field. The engine-revolutions advance-warning field is subdivided into:
- Fixed engine-revolutions advance-warning field
- Variable engine-revolutions advance-warning field
The engine-revolutions advance-warning field is controlled as a function of engine temperature. The engine-revolutions advance-warning fields for spark-ignition and diesel engines differ.
| Spark-ignition engine | Diesel engine | |
|---|---|---|
| Start of the variable engine-revolutions advance-warning field | 4200 RPM | 3500 RPM |
| End of the variable engine-revolutions advance-warning field | 6300 RPM | 4600 RPM |
| Start of the fixed warning field for engine revolutions | 6500 RPM | 5000 RPM |
| End of the fixed warning field for engine revolutions | 7000 RPM | 5500 RPM |
The instrument cluster has an 18-pin connection to the onboard power supply. The internal acoustic generator is also on the rear of the instrument cluster.
PIN ASSIGNMENT FOR INSTRUMENT CLUSTER CONNECTOR X16, 18-PIN
| Pin | Type | Description |
|---|---|---|
| 1 | - | - |
| 2 | A | Voltage supply for fuel level sensor, right |
| 3 | A | Voltage supply for fuel level sensor, left |
| 4 | A | Voltage supply for ambient temperature sensor |
| 5 | E | Signal from ambient temperature sensor |
| 6 | E/A | K-CAN (High) |
| 7 | E/A | K-CAN (Low) |
| 8 | - | - |
| 9 | V | Voltage supply for instrument cluster with terminal 30 (permanent) |
| 10 | - | - |
| 11 | E | Signal from coolant-level switch |
| 12 | E | Signal from windscreen washer fluid-level switch |
| 13 | E | Signal from parking-brake warning switch |
| 14 | - | - |
| 15 | E | Signal from fuel-level sensor, right |
| 16 | E | Signal from fuel-level sensor, left |
| 17 | - | - |
| 18 | M | Earth for instrument cluster, terminal 31 |
| A = Output E = Input E/A = Input and output M = Earth V = Supply For current specifications regarding pin assignment, please refer to BMW diagnosis system. |
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