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DRIVEABILITY - NGC
Symptom List:
P0506-IDLE SPEED LOW PERFORMANCE
P0507-IDLE SPEED HIGH PERFORMANCE
Test Note: All symptoms listed above are diagnosed using the same tests.
The title for the tests will be P0506-IDLE SPEED LOW PER-
FORMANCE.
When Monitored and Set Condition:
P0506-IDLE SPEED LOW PERFORMANCE
When Monitored: Engine Running. During an idle condition.
Set Condition: If the engine RPM does not come within a calibratable low limit of the
target idle speed, a failure timer will increment. When the appropriate failure timer
reaches its maximum threshold without sign of RPM trending towards control, a soft fail
is generated. When a calibratable number of the soft fails is reached, a 1 trip fault is set.
When two 1 trip faults occur in a row, the DTC is set and the MIL illuminates.
P0507-IDLE SPEED HIGH PERFORMANCE
When Monitored: Engine Running. During an idle condition.
Set Condition: If the engine RPM does not come within a calibratable high limit of the
target idle speed, a failure timer will increment. When the appropriate failure timer
reaches its maximum threshold without sign of RPM trending towards control, a soft fail
is generated. When a calibratable number of the soft fails is reached, a 1 trip fault is set.
When two 1 trip faults occur in a row, the DTC is set and the MIL illuminates.
GOOD TRIP EQUAL TO ZERO
PCV SYSTEM
IAC MOTOR PASSAGES
VACUUM LEAKS
AIR INDUCTION SYSTEM
THROTTLE BODY AND THROTTLE LINKAGE
TEST
1
Ignition on, engine not running.
With the DRBIII , read DTCs and record the related Freeze Frame data.
Is the Good Trip Counter displayed and equal to zero?
Yes → Go To 2
→ Refer to the INTERMITTENT CONDITION symptom in the
No
POSSIBLE CAUSES
ACTION
Driveability category.
Perform POWERTRAIN VERIFICATION TEST VER - 5 - NGC.
196
APPLICABILITY
All
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