Dodge ZB 2005 Service Manual page 1277

DRIVEABILITY - GAS
Symptom:
P1398-MIS-FIRE ADAPTIVE NUMERATOR AT LIMIT
When Monitored and Set Condition:
P1398-MIS-FIRE ADAPTIVE NUMERATOR AT LIMIT
When Monitored: Under closed throttle decel and Fuel Pulse Width equal to zero for 30
seconds.
Set Condition: One of the CKP sensor target windows has more than 2.86% variance from
the reference window.
ADAPTIVE NUMERATOR RELEARN
CMP SENSOR CONNECTOR/WIRING
CKP SENSOR CONNECTOR/WIRING
DAMAGED TONE WHEEL/FLEX PLATE (CRANKSHAFT)
CRANKSHAFT POSITION SENSOR
PCM
TEST
1 Note: Check for any TSB's that may apply to this symptom.
Read and record the Freeze Frame Data. Use this information to help you duplicate
the conditions that set the DTC. Pay particular attention to the DTC set conditions,
such as, VSS, MAP, ECT, and Load.
Ignition on, engine not running.
With the DRBIII in the miscellaneous menu, choose Clear PCM (battery disconnect)
to reset the PCM.
With the DRBIII , choose the Misfire Pretest screen.
Road test the vehicle and re-learn the adaptive numerator.
The adaptive numerator is learned when the Adaptive Numerator Done Learning
line on the Misfire screen changes to Yes.
Did the adaptive numerator re-learn?
Yes → Refer to the INTERMITTENT CONDITION Symptom (Diagnos-
→ Go To 2
No
POSSIBLE CAUSES
ACTION
tic Procedure).
Perform POWERTRAIN VERIFICATION TEST VER - 5.
156
APPLICABILITY
All