Diagnostic Trouble Code (Dtc) P0342 Camshaft Position (Cmp) Sensor Circuit Low Input - Isuzu 1999 RODEO Workshop Manual

DIAGNOSTIC TROUBLE CODE (DTC) P0342 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 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 does not
receive pulses on the CMP reference circuit, Diagnostic
Trouble Code (DTC) P0342 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. Diagnostic Trouble Code (DTC) P0342
is a type B code.
Conditions for Setting the DTC
f The engine is running.
f The CMP sensor signal is not received by the PCM
once every 4 cylinders.
f The above condition occurs for 10 seconds.
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.
RODEO X22SE 2.2L ENGINE DRIVEABILITY AND EMISSION
SENSOR CIRCUIT LOW INPUT
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) P0342 will
clear after 40 consecutive warm–up cycles have
occurred without a fault.
f Diagnostic Trouble Code (DTC) P0342 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:
6E1–225
D06RX053