Daewoo CIELO EURO III Manual page 430

1F – 260 ENGINE CONTROLS
58X CRANKSHAFT POSITION (CKP) SENSOR NO SIGNAL
Circuit Description
The 58X reference signal is produced by the Crankshaft
Position (CKP) sensor. During one crankshaft revolu-
tion, 58 crankshaft pulses will be produced. The
engine control module
(ECM) uses the 58X reference signal to calculate engine
rpm and CKP. The ECM 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 ECM
receives and incorrect number of pulses on the 58X ref-
erence circuit, DTC P0337 will set.
Conditions for Setting the DTC
Engine cranking.
No CMP sensor DTCs are set (P0341 and P0342).
1.5L SOHC
The change of voltage drop is greater than 0.5 volt
and the change of Manifold Absolute Pressure (MAP)
is greater than 0.28 kPa.
Test failed if 58x reference pulse not seen for 8 sec-
onds.
Action Taken When the DTC Sets
The ECM will illuminate the Malfunction Indica-
tor Lamp (MIL) after the first trip in which the fault is
detected.
The ECM will store conditions which were pres-
ent when the DTC was set as Freeze Frame and in
the Failure Records data.
A history DTC is stored.
DIAGNOSTIC TROUBLE CODE (DTC) P0337
Conditions for Clearing the MIL/DTC
The ECM will turn the MIL OFF on the third
(fourth – /1.5L SOHC) consecutive trip
cycle during which the diagnostic has been run and
the fault condition is no longer present.
A history DTC will clear after 40 consecutive warm up
cycles have occurred without a fault.
DTC(s) can be cleared by using the scan tool.
Diagnostic Aids
An intermittent may be caused by a poor connection,
rubbed-through wire insulation or a wire broken inside
the insulation. Check for:
Poor connection – Inspect the ECM harness
and connectors for improper mating, broken locks,
improperly formed or damaged terminals, and poor
terminal-to-wire connection.
Damaged harness – Inspect the wiring harness for
damage. If the harness appears to be OK, disconnect
the ECM, turn the ignition on, and observe a
voltmeter connected to the 58X reference circuit at
the ECM harness connector while moving con-
nectors and wiring harnesses related to the
ECM. 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 DTC to be set oc-
curs. This may assist in diagnosing the condition.
Test Description
Number(s) below refer to the step number(s) on the
Diagnostic Table.
TAA1F310
DAEWOO T-154 BL2,3