Diagnostic Trouble Code (Dtc) P0107 Manifold Absolute Pressure (Map) Sensor Circuit Low Input - Isuzu 1999 RODEO Workshop Manual

6E1–114 RODEO X22SE 2.2L ENGINE DRIVEABILITY AND EMISSION
DIAGNOSTIC TROUBLE CODE (DTC) P0107 MANIFOLD ABSOLUTE PRES-
Circuit Description
The manifold absolute pressure (MAP) sensor responds
to changes in intake manifold pressure. The MAP sensor
signal voltage to the powertrain control module (PCM)
varies from below 2 volts at idle (low manifold pressure) to
above 4 volts with the ignition ON, engine not running or at
wide–open throttle (high manifold pressure).
A "speed density" method of determining engine load is
used on the 2.2L engine. This is calculated using inputs
from the MAP sensor, the CKP Sensor, and the Intake Air
Temperature (IAT) sensor. The MAP sensor is the main
sensor used in this calculation, and measuring engine
load is its main function. The MAP sensor is also used to
determine manifold pressure changes while the exhaust
gas recirculation (EGR) flow test diagnostic is being run,
to determine engine vacuum level for some other
diagnostics and to determine barometric pressure
(BARO). Refer to DTC P0401.
The PCM monitors the MAP signals for voltages outside
the normal range (10–104 kpa) of the MAP sensor. If the
PCM detects a MAP signal voltage that is excessively
low, Diagnostic Trouble Code P0107 will be set. DTC
P0107 is a Type A Code.
Conditions for Setting the DTC
f No TP sensor Diagnostic Trouble Codes present.
f Engine is running.
SURE (MAP) SENSOR CIRCUIT LOW INPUT
f System voltage greater than 11 volts.
f Throttle angle is above 0% if engine speed is less than
or equal to 1300 RPM.
f Throttle angle is above 5% if engine speed is above
1300 RPM.
f The MAP sensor indicates manifold absolute pressure
below 11 kPa for a total of approximately 10 seconds
over a 16–second period.
Action Taken When the DTC Sets
f The PCM will illuminate the malfunction indicator lamp
(MIL) the first time the fault is detected.
f The PCM will default to a BARO value of 79.3 kPa.
f The PCM will use a MAP value based on speed density
calculation.
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.
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 DTC P0107 will clear after 40 consecutive
warm–up cycles have occurred without a fault.
f Diagnostic Trouble Code P0107 can be cleared by
using the Scan Tool's "Clear Info" function.
D06RX042