Lambda sensor correction
•
Example value with key ON: 1.00 mV
•
Example value with engine on: 0.90 - 1.10mV
In closed loop, the value must be close to 1.00 (values not within the 0.90 - 1.10 interval indicate a fault):
for example, value 0.75 corresponds to +25% with respect to the reference injection time; 1.25 corre-
sponds to -25%. In an open circuit, the oxygen sensor signal is too low. Therefore, the control unit takes
it as a lean combustion condition and will try to enrich it. The value read will be 0.75: once this correction
has been tried, the value shifts to 1.00 fixed and the Lambda probe error is signalled.
CAUTION
BEFORE CARRYING OUT ANY TROUBLESHOOTING, CAREFULLY READ THE GENERAL TROU-
BLESHOOTING CONCEPTS FOR ELECTRICAL DEVICES AT THE BEGINNING OF THE CHECK
AND CONTROL SECTION IN THE ELECTRICAL SYSTEM CHAPTER.
DIAGNOSTICS INSTRUMENT: STATUSES
Lambda probe: Start-up_Lean_Rich_Fault due to rich value_Fault due to lean value
•
If the probe connector is removed (voltage almost equal to zero), the status is Fault due to
lean value.
Lambda check: Open loop/Closed loop/Rich in closed loop/Lean in closed loop/enriched
•
Closed loop indicates that the control unit is using the oxygen sensor signal to keep the
combustion as close as possible to the stoichiometric value.
DIAGNOSTICS INSTRUMENT: ACTIVATION
Lambda probe heating
•
The auxiliary injection relay (No. 46 in the wiring diagram, placed in the front relay box, left
side; CHECK, however, the identification of the relay with the colour of the cables) is ener-
gised and the heating circuit is closed to ground 5 times (pin 3 of the lambda probe
connector). The continuity of the wiring is necessary for correct activation: no error indica-
tions are displayed in case of lack of activation.
DIAGNOSTICS INSTRUMENT: ELECTRICAL ERRORS
Front lambda probe P0130
•
shorted to positive
Error cause
•
Excessive voltage (battery voltage) has been detected at PIN 10 and 22 of the ENGINE
connector. Caution: the 'Oxygen sensor' parameter is not the real value that is read; a re-
covery value is displayed instead. The instrument panel does not indicate the presence of
this error even in the ATT status.
Troubleshooting
Electrical system
CAPONORD 1200
ELE SYS - 132
Summary of Contents for CAPONORD 1200
Page 1: ...MANUALE STAZIONE DI SERVIZIO 2Q000020 CAPONORD 1200 ...
Page 6: ......
Page 7: ...INDEX OF TOPICS CHARACTERISTICS CHAR ...
Page 55: ...INDEX OF TOPICS SPECIAL TOOLS S TOOLS ...
Page 62: ...INDEX OF TOPICS MAINTENANCE MAIN ...
Page 73: ...INDEX OF TOPICS TROUBLESHOOTING TROUBL ...
Page 74: ...Engine Troubleshooting CAPONORD 1200 TROUBL 74 ...
Page 75: ...INDEX OF TOPICS ELECTRICAL SYSTEM ELE SYS ...
Page 80: ...key 1 MULTIPLE CONNECTORS Electrical system CAPONORD 1200 ELE SYS 80 ...
Page 83: ...key 1 MULTIPLE CONNECTORS CAPONORD 1200 Electrical system ELE SYS 83 ...
Page 194: ...INDEX OF TOPICS ENGINE FROM VEHICLE ENG VE ...
Page 209: ...See also Vehicle preparation Adjusting CAPONORD 1200 Engine from vehicle ENG VE 209 ...
Page 210: ...INDEX OF TOPICS ENGINE ENG ...
Page 294: ...INDEX OF TOPICS POWER SUPPLY P SUPP ...
Page 295: ...Fuel pump Injection CAPONORD 1200 Power supply P SUPP 295 ...
Page 296: ...INDEX OF TOPICS SUSPENSIONS SUSP ...
Page 339: ...INDEX OF TOPICS CHASSIS CHAS ...
Page 353: ...INDEX OF TOPICS BRAKING SYSTEM BRAK SYS ...
Page 378: ...INDEX OF TOPICS CLUTCH SYSTEM CLU SYS ...
Page 380: ...INDEX OF TOPICS COOLING SYSTEM COOL SYS ...
Page 388: ...INDEX OF TOPICS BODYWORK BODYW ...
Page 430: ...INDEX OF TOPICS ...
Page 431: ...PRE DELIVERY PRE DE ...
Page 439: ...Tyres 15 W Warning lights Water pump 383 Wiring diagram 79 ...