P0522-OIL PRESSURE TOO LOW
For a complete wiring diagram Refer to Section 8W.
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When Monitored:
With the ignition key on and battery voltage above 10.4 volts.
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Set Condition:
The oil pressure sensor voltage at PCM goes below 0.1 of a volt for 0.5 of a second. One Trip Fault. Three good trips to turn off the MIL.
Possible Causes
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(G6) OIL PRESSURE SIGNAL CIRCUIT OPEN
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(G6) OIL PRESSURE SIGNAL CIRCUIT SHORTED TO BATTERY VOLTAGE
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(G6) OIL PRESSURE SIGNAL CIRCUIT SHORTED TO GROUND
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OIL PRESSURE SWITCH
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PCM
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Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding.
(Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).
Diagnostic Test
1.
ACTIVE DTC
Ignition on, engine not running.
With a scan tool, select View DTCs.
Is the DTC Active at this time?
Yes
No
2.
OIL PRESSURE SWITCH
Turn the ignition off.
Disconnect the Oil Pressure Switch harness connector.
Ignition on, engine not running.
Connect a jumper wire to the (G6) Oil Pressure Signal circuit in the Sensor harness connector.
With the scan tool monitor the Oil Pressure Switch state.
Touch the other end of the jumper wire to a known good Ground several times.
Did the Oil Pressure Switch state change from High to Low when connecting and disconnecting the jumper wire to ground?
Yes
No
3.
(G6) OIL PRESSURE SIGNAL CIRCUIT SHORTED TO BATTERY VOLTAGE
Turn the ignition off.
Disconnect the C1 PCM harness connector.
Ignition on, engine not running.
Measure the voltage on the (G6) Oil Pressure Signal circuit in the Switch harness connector.
Is the voltage above 0 volts?
Yes
No
4.
(G6) OIL PRESSURE SWITCH SIGNAL CIRCUIT OPEN
CAUTION:
Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage the PCM terminals resulting in poor terminal to pin connection. Install Miller Special
Tool #8815 to perform diagnosis.
Measure the resistance of the (G6) Oil Pressure Signal circuit from the Oil Pressure Switch harness connector to the appropriate terminal of special tool #8815.
Is the resistance below 5.0 ohms?
Yes
No
5.
(G6) SIGNAL CIRCUIT SHORTED TO GROUND
Measure the resistance between a known good ground and the (G6) Oil Pressure Signal circuit in the Switch connector.
Is the resistance below 100 ohms?
Yes
No
6.
PCM
NOTE:
Before continuing, check the PCM harness connector terminals for corrosion, damage, or terminal push out. Repair as necessary.
Using the schematics as a guide, inspect the wire harness and connectors. Pay particular attention to all Power and Ground circuits.
Were there any problems found?
Yes
No