(248-2502) Correct choice of ignition discharge module
TECHNICAL SERVICE BULLETIN | |
Bulletin Nbr: | 248-2502 |
Date: ........... | November 2004 |
Market: | all |
Correct choice of ignition discharge module |
Background |
It is extremely important that the different variants of ignition discharge modules available at Saab workshops are used with the correct engine type. The modules must not be used incorrectly in short-term testing as they could destroy components in both engine control module and ignition discharge module. Faults caused by mixing them do not necessarily appear directly, but may appear a lot later.
Table, colour configuration:
Colour, installed ignition discharge module:
|
Colour, test ignition discharge module:
|
|
Trionic T5
|
red
|
blue
|
Trionic T7
|
black
|
green
|
Red and blue ignition discharge modules are identical. Black and green ignition discharge modules are identical.
The differences between red/blue (T5) and black/green (T7) are in:
- Ignition coils (different inductance and voltage type)- Trigger signals (different sensitivity to external interference)
- Knock signal (different degrees of signal amplification)
- Charge and discharge circuits (different technical concepts)
Warranty/Time Information |