Diagnostic Trouble Code (Dtc) P0337 Crankshaft Position (Ckp) Sensor Circuit Low Input - Isuzu 1999 RODEO Workshop Manual

DIAGNOSTIC TROUBLE CODE (DTC) P0337 CRANKSHAFT POSITION (CKP)
Circuit Description
The 58X reference signal is produced by the crankshaft
position (CKP) sensor. During one crankshaft revolution,
58 crankshaft reference pulses will be produced. The
powertrain control module (PCM) uses the 58X reference
signal to calculate engine RPM and crankshaft position.
The PCM constantly monitors the number of pulses on
the 58X reference circuit and compares them to the
number of camshaft position (CMP) signal pulses being
received. If the PCM does not receive pulses on the 58X
reference circuit, Diagnostic Trouble Code P0337 will set.
Diagnostic Trouble Code P0337 is a type B code.
Conditions for Setting the DTC
f No camshaft position (CMP) sensor DTCs are set.
f Engine cranking.
f Crankshaft position (CKP) sensor signal is not present
between two cam pulses.
f CKP reference pulse is not detected within 24 CMP
pulses.
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.
f The PCM will store conditions which were present
when the Diagnostic Trouble Code was set as Freeze
Frame and in the Failure Records data.
RODEO X22SE 2.2L ENGINE DRIVEABILITY AND EMISSION
SENSOR CIRCUIT LOW INPUT
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 P0337 will clear
after 40 consecutive warm–up cycles have occurred
without a fault.
f Diagnostic Trouble Code P0337 can be cleared by
using the Scan Tool's "Clear Info" function.
Diagnostic Aids
An intermittent may be caused by a poor connection,
rubbed–through wire insulation or a wire broken inside the
insulation. Check for:
f Poor connection – Inspect the PCM harness and
connectors for improper mating, broken locks,
improperly formed or damaged terminals, and poor
terminal–to–wire connection.
f Damaged harness – Inspect the wiring harness for
damage; shorts to ground, shorts to battery positive
and open circuits. If the harness appears to be OK,
disconnect the PCM, turn the ignition on and observe
a voltmeter connected to the 58X reference circuit at
the PCM harness connector while moving connectors
and wiring harnesses related to the PCM. A change in
voltage will indicate the location of the fault.
Reviewing the Failure Records vehicle mileage since the
diagnostic test last failed may help determine how often
the condition that caused the Diagnostic Trouble Code to
6E1–219
D06RX052