Isuzu 2008MY N Series, Руководство по ремонту

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Engine Control System (4HK1) 1A-275
DTC P2227 (Flash Code 71)
Circuit Description
The barometric pressure (BARO) sensor is located
under the instrument panel (IP) cluster near the pedal
bracket. The BARO sensor is a transducer that varies
voltage according to changes the barometric pressure.
Within the ECM, the diagnostic compares the BARO
sensor input to the boost pressure sensor input. If the
ECM detects that the inputs are not within a specified
amount of each other, this DTC will set.
Condition for Running the DTC
• DTCs P0102, P0103, P0107, P0108, P0116,
P0117, P0118, P0122, P0123, P0500, P0502,
P0503, P0560, P060B, P0638, P0651, P0697,
P2228 and P2229 are not set.
• The battery voltage is between 18 to 32 volts.
• The ignition switch is ON.
• The engine speed is less than 625 RPM.
• The fuel injection quantity is less than a
predetermined value.
• The accelerator pedal is not depressed.
• The vehicle is not running.
Condition for Setting the DTC
• The ECM detects that the differential pressure
between the BARO and the boost pressure is more
than 10 kPa (1.5 psi) for longer than 7 seconds.
Action Taken When the DTC Sets
• The ECM illuminates the MIL when the diagnostic
runs and fails. Refer to DTC Type Definitions for
Action Taken When the DTC Sets - Type B.
Condition for Clearing the DTC
• Refer to DTC Type Definitions for Condition for
Clearing the MIL/ DTC - Type B.
Diagnostic Aids
• If an intermittent condition is suspected, refer to
Intermittent Conditions in this section.
Schematic Reference: Engine Controls Schematics
Connector End View Reference: Engine Controls
Connector End Views or ECM Connector End Views
Circuit/ System Testing DTC P2227
Step Action Value(s) Yes No
1
Did you perform the Diagnostic System Check
- Engine Controls?
—
Go to Step 2
Go to Diagnostic
System Check -
Engine Controls
2
1. Install a scan tool.
2. Turn OFF the ignition for 30 seconds.
3. Start the engine.
4. Monitor the DTC Information with a scan tool.
Is DTC P0107, P0108, P2228 or P2229 also
set?
—
Go to Applicable
DTC Go to Step 3
3
1. Turn ON the ignition, with the engine OFF.
2. Compare the Boost Pressure parameter to the
Barometric Pressure (BARO) parameter with
a scan tool.
Are both parameter within the range specified
of each other?
10 kPa (1.5
psi)
Go to Diagnostic
Aids Go to Step 4
4
Determine the outside barometric pressure from
your location specified in the altitude vs barometric
pressure table. Refer to Altitude vs Barometric
Pressure.
Is the BARO parameter on the scan tool close
to the outside barometric pressure?
—
Go to Step 5 Go to Step 7
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