DaimlerChrysler Jeep Grand Cherokee 2002, Service Manual

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Symptom:
P0520-OIL PRESS SENSOR CKT MALF SIGNAL VOLTAGE TOO
HIGH
When Monitored and Set Condition:
P0520-OIL PRESS SENSOR CKT MALF SIGNAL VOLTAGE TOO HIGH
When Monitored: With the engine running.
Set Condition: The ECM detects the Oil Pressure Sensor Signal above 4.9 volts for more
than 3 seconds.
POSSIBLE CAUSES
ECM - OIL PRESSURE SENSOR SIGNAL CIRCUIT SHORTED TO VOLTAGE
ECM - OIL PRESSURE SENSOR SIGNAL OPEN
ENGINE OIL PRESSURE SENSOR
OIL PRESSURE SENSOR SIGNAL CIRCUIT OPEN
OIL PRESSURE SENSOR SIGNAL CIRCUIT SHORTED TO VOLTAGE
SENSOR GROUND CIRCUIT OPEN
INTERMITTENT CONDITION
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 DRBIII
t
, erase ECM DTCs.
Start the engine several times, letting the engine run for at least 30 seconds at a
time.
With the DRBIII
t
, read ECM DTCs.
Did this DTC set again?
All
Yes
→
Go To 2
No
→
Go To 6
2 Turn the ignition off.
Disconnect the Oil Pressure Sensor harness connector.
Turn the ignition on.
Measure the voltage of the Oil Pressure Sensor Signal circuit.
Select the appropriate voltage reading. All
Voltage is above 5.5 volts.
Go To 3
Voltage is between 4.7 and 5.4 volts.
Go To 4
Voltage is below 4.7 volts.
Go To 5
105
DRIVEABILITY - DIESEL
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