Chrysler RG Voyager. Manual - part 400

TEST

ACTION

APPLICABILITY

Turn the ignition off.
Disconnect the ECM harness connectors.
Disconnect the Oil Pressure Sensor harness connector.
Measure the resistance of the Sensor Ground circuit.
Is the resistance below 10.0 ohms?

All

Yes

→ Replace the Oil Pressure Sensor.

Perform ROAD TEST VERIFICATION - VER-2.

→ Repair the Sensor Ground circuit for an open.

Perform ROAD TEST VERIFICATION - VER-2.

Turn the ignition off.
Disconnect the ECM harness connectors.
Disconnect the Oil Pressure Sensor harness connector.
Measure the resistance of the Oil Pressure Sensor Signal circuit.
Is the resistance below 10.0 ohms?

All

Yes

→ Go To 8

→ Repair the Oil Pressure Sensor Signal circuit for an open.

Perform ROAD TEST VERIFICATION - VER-2.

Turn the ignition off.
Disconnect the ECM harness connectors.
Disconnect the Oil Pressure Sensor harness connector.
Measure the resistance between ground and the Oil Pressure Sensor Signal circuit.
Is the resistance above 1000 ohms?

All

Yes

→ Go To 9

→ Repair the Oil Pressure Sensor Signal circuit for a short to

ground.
Perform ROAD TEST VERIFICATION - VER-2.

Turn the ignition off.
Disconnect the ECM harness connectors.
Disconnect the Oil Pressure Sensor harness connector.
Measure the resistance between Sensor Ground and the Oil Pressure Sensor Signal
circuit.
Is the resistance above 1000 ohms?

All

Yes

→ Replace and program the Engine Control Module in accordance

with the Service Information.
Perform ROAD TEST VERIFICATION - VER-2.

→ Repair the Oil Pressure Sensor Signal circuit for a short to the

Sensor Ground circuit.
Perform ROAD TEST VERIFICATION - VER-2.

103

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P0520- OIL PRESS SENSOR CIRCUIT MALF PLAUSIBILITY —

Continued

TEST

ACTION

APPLICABILITY

WARNING: WHEN THE ENGINE IS OPERATING, DO NOT STAND IN A
DIRECT LINE WITH THE FAN. DO NOT PUT YOUR HANDS NEAR THE
PULLEYS, BELTS OR FAN. DO NOT WEAR LOOSE CLOTHING.
NOTE: The conditions that set the DTC are not present at this time. The
following list may help in identifying the intermittent condition.
With the engine running and at normal operating temperature, monitor the DRB
parameters related to the DTC while wiggling the wiring harness. Look for param-
eter values to change and/or a DTC to set.
Review the DTC When Monitored and Set Conditions. If possible, try to duplicate the
conditions under which the DTC was set.
Refer to any Technical Service Bulletins (TSB) that may apply.
Visually inspect the related wiring harness. Look for any chafed, pierced, pinched, or
partially broken wires.
Visually inspect the related wiring harness connectors. Look for broken, bent, pushed
out, or corroded terminals.
Were any of the above conditions present?

All

Yes

→ Repair as necessary.

Perform ROAD TEST VERIFICATION - VER-2.

→ Test Complete.

104

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P0520- OIL PRESS SENSOR CIRCUIT MALF PLAUSIBILITY —

Continued

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 4.7 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

NOTE: If DTC P0641 or P0651 is present with this DTC, diagnose DTCs
P0641 and P0651 before diagnosing this DTC.
NOTE: If the ECM detects and stores a DTC, the ECM also stores the
engine/vehicle operating conditions under which the DTC was set. Some of
these conditions are displayed on the DRB at the same time the DTC is
displayed.
NOTE: Before erasing stored DTCs, record these conditions. Attempting to
duplicate these conditions may assist when checking for an active 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

→ Go To 6

105

DRIVEABILITY - DIESEL

TEST

ACTION

APPLICABILITY

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 5.4 volts.

Go To

Voltage is between 4.7 and 5.4 volts.

Go To

Voltage is below 4.7 volts.

Go To

Turn the ignition off.
Disconnect the Oil Pressure Sensor harness connector.
Disconnect the ECM harness connectors.
Remove the ECM/PCM Relay from the IPM.
Connect a jumper wire between cavity 30 and cavity 87 of the ECM/PCM Relay
connector.
Turn the ignition on.
Measure the voltage of the Oil Pressure Sensor Signal circuit.
Is the voltage below 1.0 volt?

All

Yes

→ Replace and program the Engine Control Module in accordance

with the Service Information.
Perform ROAD TEST VERIFICATION - VER-2.

→ Repair the Oil Pressure Sensor Signal circuit for a short to

voltage.
Perform ROAD TEST VERIFICATION - VER-2.

All

Yes

→ Replace the Engine Oil Pressure Sensor.

Perform ROAD TEST VERIFICATION - VER-2.

→ Repair the Sensor Ground circuit for an open.

Perform ROAD TEST VERIFICATION - VER-2.

All

Yes

→ Replace and program the Engine Control Module in accordance

with the Service Information.
Perform ROAD TEST VERIFICATION - VER-2.

→ Repair the Oil Pressure Sensor Signal circuit for an open.

Perform ROAD TEST VERIFICATION - VER-2.

106

DRIVEABILITY - DIESEL

P0520-OIL PRESS SENSOR CKT MALF SIGNAL VOLTAGE TOO HIGH —

Continued

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