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(P0521) ENGINE OIL SENSOR QUALITY PERFORMANCE (CONTINUED)
5.
MEASURE THE RESISTANCE OF THE SENSOR GROUND CIRCUIT
Turn the ignition off.
Disconnect the Oil Sensor harness connector.
Disconnect the PCM C3 harness connector.
Note: Check connectors — Clean/repair as necessary.
Measure the resistance of the Sensor Ground circuit from the Oil Sen-
sor harness connector to the PCM C3 harness connector.
Is the resistance below 5.0 ohms?
Yes
>> Replace and program the Powertrain Control Module.
(Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL
MODULES/POWERTRAIN
REMOVAL).
Perform POWERTRAIN VERIFICATION TEST - VER 2.
No
>> Repair the Sensor Ground circuit for an open.
Perform POWERTRAIN VERIFICATION TEST - VER 2.
6.
CHECK FOR MAP SENSOR DTC
With the ignition on.
With the DRB III , read PCM DTCs.
Are any MAP Sensor DTCs present?
Yes
>> Go To 7
No
>> Go To 13
ENGINE - ELECTRICAL DIAGNOSTICS 9 - 537
CONTROL
MODULE
-
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