SHOP MANUAL MT26-31 - 06.2005
Engine
Tier-3 710655-
Ch 1 page 36
How to erase fault codes
1 Turn the ignition off.
2 Depress the diagnostic switch while turning
on the ignition.
3 Hold the diagnostic switch down for
between 3 and 10 seconds.
4 This erases the passive fault codes.
The active codes must be rectified to make them
passive. They can then be erased.
Troubleshooting using flash codes for the coordinator
• As soon as a fault is detected by the coordinator, it is stored in the EEPROM
fault code memory.
The diagnostics lamp for the coordinator (the right-hand lamp on Scania’s instrument panel) comes on when
the diagnostic switch is actuated.
• The EMS lamp also lights up to indicate that there is an internal fault in the
coordinator (fault code 23)
• Even if the lamp has gone off and the fault is no longer active, the code can generally
be read off in accordance with the instruction below.
How to read fault codes for the coordinator
1 Switch on the ignition.
2 Depress the diagnostic switch for at least 1 second.
3 A fault code will then flash on the diagnostics lamp for the coordinator
(the right-hand lamp on Scania’s instrument panel).
This flash code consists of long flashes (about 1 second long) and short
flashes (0.3 seconds long).
Long flashes are equivalent to tens and short flashes to units.
Example: long - long - short - short - short - short - short = fault code 25. Refer to the illustration.
4 Repeat this procedure until the first flash code is repeated. This means that the entire
fault code memory has been flashed up. If the fault code memory is empty, only one
long flash approximately 4 seconds long will be given.
5 See the flash code list on page 14 for a description and localisation of the fault.
= 25
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