DaimlerChrysler Jeep Grand Cherokee 2002, Руководство по обслуживанию

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Symptom:
P0235-BOOST PRESSURE SENSOR PLAUSIBILITY
When Monitored and Set Condition:
P0235-BOOST PRESSURE SENSOR PLAUSIBILITY
When Monitored: With the engine speed below 800 rpm.
Set Condition: When the engine is idling, the boost pressure sensor input differs from the
barometric pressure sensor input by 2.17 psi for at least 6 seconds.
POSSIBLE CAUSES
INTERMITTENT CONDITION
HIGH RESISTANCE IN THE BOOST PRESSURE SENSOR SIGNAL CIRCUIT
HIGH RESISTANCE IN THE BOOST PRESSURE SENSOR GROUND CIRCUIT
HIGH RESISTANCE IN THE 5-VOLT SUPPLY CIRCUIT
BOOST PRESSURE SENSOR
ENGINE CONTROL MODULE
TEST ACTION APPLICABILITY
1 NOTE: If DTC P0641 or P0651 is present with this DTC, diagnose DTCs
P0641 and P0651 before diagnosing this DTC.
Turn the ignition on.
With the DRB, erase ECM DTCs.
Turn the ignition off, wait 30 seconds, then start and idle the engine for at least 30
seconds.
NOTE: Engine idle speed must be below 870 RPM.
With the DRB, read ECM DTCs.
Did this DTC set again? All
Yes
→
Go To 2
No
→
Go To 6
2 Turn the ignition off.
Disconnect the Boost Pressure Sensor harness connector.
Disconnect the ECM harness connectors.
Measure the resistance of the Boost Pressure Sensor Signal circuit.
Is the resistance below 5.0 ohms? All
Yes
→
Go To 3
No
→
Repair the Boost Pressure Sensor Signal circuit for high resis-
tance.
Perform ROAD TEST VERIFICATION - VER-2.
53
DRIVEABILITY - DIESEL
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