Diagnostic Trouble Code (Dtc) P0341 Camshaft Position (Cmp) Sensor Circuit Range/Performance - Isuzu 1999 RODEO Workshop Manual

6E1–222 RODEO X22SE 2.2L ENGINE DRIVEABILITY AND EMISSION
DIAGNOSTIC TROUBLE CODE (DTC) P0341 CAMSHAFT POSITION (CMP)
Circuit Description
The camshaft position (CMP) sensor signal is produced
by the CMP sensor pulses when the engine is running and
crankshaft position (CKP) sync pulses are also being
received. The powertrain control module (PCM) uses the
CMP signal pulses to initiate sequential fuel injection. The
PCM constantly monitors the number of pulses on the
CMP signal circuit and compares the number of CMP
pulses to the number of 58X reference pulses received. If
the PCM receives an incorrect number of pulses on the
CMP reference circuit, Diagnostic Trouble Code P0341
will set and the PCM will initiate injector sequence without
the CMP signal with a one in four chance that injector
sequence is correct. The engine will continue to start and
run normally, although the misfire diagnostic will be
affected if a misfiring condition occurs. DTC P0341 is a
type B code.
Conditions for Setting the DTC
f The engine is running (CMP reference pulses are
being received).
f Above condition fails for 10 occurrences within 100 test
samples (15.6 m/s).
Action Taken When the DTC Sets
f The PCM will illuminate the malfunction indicator lamp
(MIL) after the second consecutive trip in which the
fault is detected.
SENSOR CIRCUIT RANGE/PERFORMANCE
f The PCM will initiate injector sequence without the
CMP signal with a one in four chance that injector
sequence is correct.
f The PCM will store conditions which were present
when the Diagnostic Trouble Code (DTC) was set as
Freeze Frame and in the Failure Records data.
Conditions for Clearing the MIL/DTC
f The PCM will turn the MIL OFF on the third consecutive
trip cycle during which the diagnostic has been run and
the fault condition is no longer present.
f A history Diagnostic Trouble Code (DTC) P0341 will
clear after 40 consecutive warm–up cycles have
occurred without a fault.
f Diagnostic Trouble Code (DTC) P0341 can be cleared
by using the Scan Tool's "Clear Info" function.
Diagnostic Aids
f If a CKP Diagnostic Trouble Code (DTC) is also
indicated, there may be a problem with the ground
circuit because the CMP ground is spliced to the CKP
ground wire.
f If a fuel injector Diagnostic Trouble Code (DTC) is also
indicated, there may be a problem with the power
supply to the CMP. The wire supplying CMP power is
spliced to the wire supplying power to the fuel injectors.
An intermittent may be caused by a poor connection,
rubbed–through wire insulation or a wire broken inside the
insulation. Check for the following conditions:
D06RX053