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Injection
8 - Activate the exhaust fumes analyser and check
the following conditions are present:
- CO = 1.25±0.25%
- CO2 = 14.50±1%
YES go to 9 NO go to 10
9 - The adjustment is correct.
10 - If a different CO value is read, adjust the idle
injection timing.
YES go to 11
11 - Select the diagnostic tester menu on the «CO
CALIBRATION» option.
Activate the adjustment function.
YES point 12
12 - «TRIMMER VALUE» is displayed.
The numbers displayed can be positive or nega-
tive.
YES go to 13
13 â To increase the CO the injection time needs to be increased.
To decrease the CO the injection time needs to be decreased.
Adjust the trimmer value according to the indications in the table:
YES go to 14
TRIMMER VALUE
+100
+ 50
+ 10
0
- 10
- 50
-100
N.B.
THE TRIMMER VALUE 0 CORRESPONDS TO THE AVERAGE INJECTION TIMING.
AFTER ADJUSTMENT ENGINES CAN HAVE CARBURETION WITH BOTH POSITIVE AND NEG-
ATIVE TRIMMER VALUES.
THIS IS DUE TO NORMAL PRODUCTION TOLERANCES.
INJEC - 192
INJECTION TIME
HIGH
Ã
LOW
Ã
MEDIUM
Nexus 500
C O
INCREASE
Ã
Ã
DECREASE
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