Diagnostic Trouble Code (Dtc) P1336 Crankshaft Position Sensor (Ckp) System Variation Not Learned - Isuzu 1999 RODEO Workshop Manual

DIAGNOSTIC TROUBLE CODE (DTC) P1336 CRANKSHAFT POSITION
SENSOR (CKP) SYSTEM VARIATION NOT LEARNED
Circuit Description
In order to detect engine misfire at higher engine speeds,
the Powertrain Control Module (PCM) must know of any
variation between the crankshaft sensor pulse. Most
variations are due to the machining of the crankshaft
reluctor wheel, however, other sources of variation are
also possible. A Crankshaft Position Sensor Tooth Error
Correction (TEC) procedure must be performed any time
a change is made to the crankshaft sensor, crankshaft, or
if the PCM measures the variations and then calculates
compensation factors needed to enable the PCM to
accurately detect engine misfire at all speeds and loads.
The Tech 2 must be used to command the PCM to learn
these variations. If for any reason the PCM is unable to
learn these variations or they are out of an acceptable
range, the PCM will set a DTC P1336. A PCM that has not
had the Crankshaft Position Sensor Tooth Error
Correction (TEC) Procedure
replacement or reprogramming will also set a DTC
P1336. DTC P1336 is a type A code.
Conditions for Setting the DTC
f No ECT, Knock, CKP, CMP or injector sensor DTCs.
f PCM has not successfully learned crankshaft position
Tooth Error Correction(TEC) within 5 attempts or 5 Km
(3 miles).
RODEO X22SE 2.2L ENGINE DRIVEABILITY AND EMISSION
performed due to
Action Taken When the DTC Sets
f The Malfunction Indicator Lamp (MIL) will illuminate
the first time the error is detected.
f The PCM will record operating conditions at the time
the diagnostic fails. This information will be stored in
the Freeze Frame and Failure Records buffers.
f A history DTC is stored.
Conditions for Clearing the MIL/DTC
f The MIL will turn OFF after three consecutive ignition
cycles in which the diagnostic runs without a fault.
f A history DTC will clear after 40 consecutive warm up
cycles without a fault.
f DTC(s) can be cleared by using the Tech 2.
Diagnostic Aids
f Refer to "TEC Learn Procedure"
CAUTION: When performing the Crankshaft
Position Sensor Tooth Error Correction (TEC)
Procedure always set the vehicle parking brake and
block the drive wheels.
immediately when the engine starts to decelerate.
Once the learn procedure is completed, engine
control will be returned to the operator and the
engine will respond to throttle position.
DTC P1336 will only set if the PCM has not learned the
crankshaft position sensor Tooth Error Correction (TEC).
The PCM only needs to learn this variation once per life
6E1–329
014RX002
Release the throttle