| | Results
of the tests |
| 0 | PRELIMINARY CHECKS | All OK | Problems met | Operation |
|---|
| Connect
the tester (Examiner or Examiner Plus) and transcribe the errors
and environmental parametersCheck for the 'Mixture strength' error only | End of diagnosis | 'Upstream lambda probe' error
present | See table Z56 UPSTREAM LAMBDA SENSOR SIGNAL ERROR |
| Only the 'Mixture strength', 'Misfire', 'Catalyzer' and/or 'Downstream Lambda
signal' errors are present |
Continue to Step
1
|
| Other errors present | Identify and eliminate the cause of the problem |
| 1 | CHECKING SIGNAL PLAUSIBILITY | All OK | Problems met | Operation |
|---|
|
Checking
the plausibility of the flow meter signal
See Test 1056BX MAP/flow meter signal plausibility |
Continue to Step
2
| The signal is not plausible |
Replace the flowmeter
Op. 1056B12 |
| 2 | ERROR DETAIL CHECK | All OK | Problems met | Operation |
|---|
| Check
the detail of the 'Mixture strength' error | End of diagnosis | The detail is 'Above the
upper limit' | See table Z52 LEAN FUEL SYSTEM Search
for the fault starting from another symptom' |
| The detail is 'Air leaks downstream of flow meter' | See table Z52 LEAN FUEL SYSTEM Search
for the fault starting from another symptom' |
| The detail is 'Below lower limit' | See table Z51 RICH FUEL SYSTEM Search
for the fault starting from another symptom' |