Good Scope Pattern

Figure 1 - Secondary Side:

1 Ignition voltage line
2 Ignition voltage height
3 Burn time
4 Burn voltage height
5 Burn voltage line
6 Decay process
7 Opening section
8 Closing section
9 Primary current limiting (active only up to 2000 rpm)

Figure 2 - Secondary Side (Parade):

- Engine at idle.
- Example: 4 cylinder engine.
- Display follows firing order 1-3-4-2.

Figure 3 - Secondary Side (Raster):

- Engine at idle.
- Example: 4 cylinder engine.

Figure 4 - Secondary Side (Single Display):

- Engine at idle.
- The next cylinder is displayed according to firing order.

Figure 5 - Secondary Side (Single Display):

- Engine at idle.

Figure 6 - Secondary Side (Single Display):

1 Oscillation
2 Oscillation
3 Oscillation
4 Oscillation
5 Oscillation

- Engine at idle.

NOTE: Bosch ignition coil 11 A.

Identification:
Green sticker at least 5 oscillations.

Figure 7 - Secondary Side (Single Display):

1 Oscillation
2 Oscillation
3 Oscillation
4 Oscillation
5 Oscillation
6 Oscillation
7 Oscillation
8 Oscillation

- Engine at idle.

NOTE: May Christi ignition coil 8 and 11 A.
Bosch ignition coil 8 A.

Coil Identification:
8 A yellow sticker.
11 A green sticker.
at least 8 oscillations.

Figure 8 - Secondary Side (Parade):

Test condition: Accelerate engine repeatedly to 3000 RPM.

NOTE:
- As a result of the acceleration process, several cylinders are displayed in succession according to firing order, see display example (1-3-4-2-1-3-4-2 etc.).
- The ignition voltage shows a uniform increase at all cylinders during the acceleration phase. The ignition voltage increase must not exceed 6 kV.

Figure 9 - Primary Side (Parade):

- Engine at idle.

Figure 10 - Primary Side (Single Display):

- Engine at idle.

Figure 11 - Primary Side (Primary Current Limit):

Limiting of the primary current can occur intermittantly, at one or all cylinders, at engine speeds above 2000 RPM with and without load (arrows).