Dodge Neon / Neon SRT-4. Manual — part 486
Symptom:
*LOW OIL PRESSURE INDICATOR ALWAYS ON
POSSIBLE CAUSES
ENGINE OIL PRESSURE SWITCH
ENGINE OIL PRESSURE SWITCH SENSE CIRCUIT SHORT TO GROUND
POWERTRAIN CONTROL MODULE
INSTRUMENT CLUSTER
TEST
ACTION
APPLICABILITY
1
NOTE: Ensure that Engine oil pressure is within normal operating range.
Refer to the Service Information for specifications.
Allow the engine to idle.
With the DRBIII
t in Sensors, read the Engine Oil Pressure Switch state.
Does the Engine Oil Pressure Switch status read
9Closed9?
All
Yes
→ Go To 2
No
→ Replace the Instrument Cluster in accordance with the Service
Information.
Perform BODY VERIFICATION TEST - VER 1.
2
Turn the ignition off.
Disconnect the Engine Oil Pressure Switch harness connector.
With the DRBIII
t in Sensors, read the Engine Oil Pressure Switch status.
Does the Engine Oil Pressure Switch status read
9Closed9?
All
Yes
→ Go To 3
No
→ Replace the Engine Oil Pressure Switch in accordance with the
Service Information.
Perform BODY VERIFICATION TEST - VER 1.
3
Turn the ignition off.
Disconnect the Engine Oil Pressure Switch harness connector.
Disconnect the PCM (C1 connector on 2.0L equipped vehicles) harness connector.
Measure the resistance between ground and the Engine Oil Pressure Switch Sense
circuit.
Is the resistance below 5.0 ohms?
All
Yes
→ Repair the Engine Oil Pressure Switch Sense circuit for a short to
ground.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Replace the Powertrain Control Module in accordance with the
Service Information.
166
INSTRUMENT CLUSTER
Symptom:
*LOW OIL PRESSURE INDICATOR INOPERATIVE
POSSIBLE CAUSES
ENGINE OIL PRESSURE SWITCH
ENGINE OIL PRESSURE SWITCH SENSE CIRCUIT OPEN
INDICATOR LED
POWERTRAIN CONTROL MODULE
INSTRUMENT CLUSTER
TEST
ACTION
APPLICABILITY
1
Turn the ignition off.
Perform the Instrument Cluster Self Test.
Depress and hold the Trip Odometer reset button while turning the ignition on.
Did the Low Oil Pressure Indicator illuminate?
All
Yes
→ Go To 2
No
→ Go To 4
2
Turn the ignition on.
With the DRBIII
t in Sensors, read the Oil Pressure Switch state.
Disconnect the Engine Oil Pressure Switch harness connector.
With the DRBIII
t in Sensors, read the Oil Pressure Switch state.
Did the Engine Oil Pressure Switch change states?
All
Yes
→ Replace the Engine Oil Pressure Switch in accordance with the
Service Information.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 3
3
Turn the ignition off.
Disconnect the Engine Oil Pressure Switch harness connector.
Disconnect the PCM (C1 connector on 2.0L equipped vehicles) harness connector.
Measure the resistance of the Engine Oil Pressure Switch Sense circuit.
Is the resistance below 5.0 ohms?
All
Yes
→ Replace the Powertrain Control Module in accordance with the
Service Information.
No
→ Repair the Engine Oil Pressure Switch Sense circuit for an open.
Perform BODY VERIFICATION TEST - VER 1.
167
INSTRUMENT CLUSTER
TEST
ACTION
APPLICABILITY
4
Turn the ignition off.
Remove the Instrument Cluster.
Remove the Low Oil Pressure indicator LED.
Using a DVOM, select
9Diode Mode9, and attach the leads across the LED.
NOTE: Ensure that the RED lead is on the
(+( of the LED.
Did the LED illuminate?
All
Yes
→ Replace the Instrument Cluster in accordance with the Service
Information.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Replace the Low Oil Pressure Indicator LED in accordance with
the Service Information.
Perform BODY VERIFICATION TEST - VER 1.
168
INSTRUMENT CLUSTER
*LOW OIL PRESSURE INDICATOR INOPERATIVE —
Continued
Symptom:
*ONE GAUGE INOPERATIVE
POSSIBLE CAUSES
POWERTRAIN CONTROL MODULE DTCS
INSTRUMENT CLUSTER
TEST
ACTION
APPLICABILITY
1
Turn the ignition off.
With the DRBIII
t, read DTCs.
NOTE: The PCM will not store any DTCs regarding Oil Pressure concerns.
NOTE: If Oil Pressure gauge readings are in question and the gauge tests
good, a mechanical oil pressure gauge must be attached to the engine.
Does the DRBIII
t display any PCM DTCs?
All
Yes
→ Refer to the DRIVEABILITY category and perform the apropriate
symptom.
No
→ Go To 2
2
Perform the Instrument Cluster Self Test.
Turn the ignition off.
Press and hold the Trip Reset button.
Turn the ignition on.
Observe the gauge in question while the Instrument Cluster performs the Self Test.
The gauges should position at the following calibration points:
Speedometer: 30mph (51km/h BUX), 60mph (102km/h BUX), 90mph (153km/h
BUX), 120mph
Tachometer: 2000, 4000, 6000, 8000
Fuel: E, 1/2, Full
Temperature: Lo, Mid Lo, High
Did the gauge in question operate properly?
All
Yes
→ Test Complete.
No
→ Replace the Instrument Cluster in accordance with the Service
Information.
Perform BODY VERIFICATION TEST - VER 1.
169
INSTRUMENT CLUSTER
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