Chrysler PT Cruiser. Manual — part 141
TEST
ACTION
APPLICABILITY
2
Turn the ignition off.
Disconnect the Fuel Pressure Sensor harness connector.
Turn the ignition on.
Measure the voltage of the Fuel Pressure Sensor Signal circuit.
Is the voltage between 4.7 and 5.3 volts?
All
Yes
→ Replace the Fuel Pressure Sensor.
Perform ROAD TEST VERIFICATION - VER-2.
No
→ Go To 3
3
Turn the ignition off.
Disconnect the Fuel Pressure Sensor harness connector.
Disconnect the ECM harness connectors.
Measure the resistance between ground and the Fuel Pressure Sensor Signal circuit.
Is the resistance above 1000 ohms?
All
Yes
→ Go To 4
No
→ Repair the Fuel Pressure Sensor Signal circuit for a short to
ground.
Perform ROAD TEST VERIFICATION - VER-2.
4
Turn the ignition off.
Disconnect the Fuel Pressure Sensor harness connector.
Disconnect the ECM harness connectors.
Measure the resistance between the Sensor Ground circuit and the Fuel Pressure
Sensor Signal circuit.
Is the resistance above 1000 ohms?
All
Yes
→ Go To 5
No
→ Repair the Fuel Pressure Sensor Signal circuit for a short to the
Sensor Ground circuit.
Perform ROAD TEST VERIFICATION - VER-2.
5
If there are no possible causes remaining, view repair.
All
Repair
Replace and program the Engine Control Module in accordance
with the Service Information.
Perform ROAD TEST VERIFICATION - VER-2.
44
DRIVEABILITY - DIESEL
P0190-FUEL PRESS SENSOR CIRCUIT MALF SIGNAL VOLTAGE TOO
LOW —
Continued
TEST
ACTION
APPLICABILITY
6
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.
No
→ Test Complete.
45
DRIVEABILITY - DIESEL
P0190-FUEL PRESS SENSOR CIRCUIT MALF SIGNAL VOLTAGE TOO
LOW —
Continued
Symptom:
P0190-FUEL PRESS SENSOR CIRCUIT MALF SUPPLY VOLTAGE
TOO HIGH OR LOW
When Monitored and Set Condition:
P0190-FUEL PRESS SENSOR CIRCUIT MALF SUPPLY VOLTAGE TOO HIGH OR
LOW
When Monitored:
With the ignition on.
Set Condition:
The Fuel Pressure Sensor 5-Volt Supply voltage is below 4.9 volts or above
5.1 volts for 100 ms.
POSSIBLE CAUSES
CHECK FOR SENSOR REFERENCE VOLTAGE A CIRCUIT DTCS
ENGINE CONTROL MODULE
TEST
ACTION
APPLICABILITY
1
WARNING: THE FUEL INJECTION PUMP SUPPLIES HIGH-PRESSURE
FUEL TO EACH INDIVIDUAL INJECTOR THROUGH HIGH-PRESSURE
FUEL LINES. FUEL UNDER HIGH PRESSURE CAN PENETRATE SKIN
AND CAUSE PERSONAL INJURY. WEAR SAFETY GOGGLES AND ADE-
QUATE PROTECTIVE CLOTHING.
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 DRB, read ECM DTCs.
Is the High or Low DTC for P0641 SENSOR REFERENCE VOLTAGE A CIRCUIT
set with this DTC?
All
Yes
→ Refer to the symptom list for the related symptom(s).
Perform ROAD TEST VERIFICATION - VER-2.
No
→ Replace and program the Engine Control Module in accordance
with the Service Information.
Perform ROAD TEST VERIFICATION - VER-2.
46
DRIVEABILITY - DIESEL
Symptom List:
P0201-CYLINDER 1-INJECTOR CIRCUIT CURRENT DECREASE
P0201-CYLINDER 1-INJECTOR CIRCUIT LOAD DROP
P0201-CYLINDER 1-INJECTOR CIRCUIT OVERCURRENT HIGH
SIDE
P0201-CYLINDER 1-INJECTOR CIRCUIT OVERCURRENT LOW
SIDE
P0202-CYLINDER 2-INJECTOR CIRCUIT CURRENT DECREASE
P0202-CYLINDER 2-INJECTOR CIRCUIT LOAD DROP
P0202-CYLINDER 2-INJECTOR CIRCUIT OVERCURRENT HIGH
SIDE
P0202-CYLINDER 2-INJECTOR CIRCUIT OVERCURRENT LOW
SIDE
P0203-CYLINDER 3-INJECTOR CIRCUIT CURRENT DECREASE
P0203-CYLINDER 3-INJECTOR CIRCUIT LOAD DROP
P0203-CYLINDER 3-INJECTOR CIRCUIT OVERCURRENT HIGH
SIDE
P0203-CYLINDER 3-INJECTOR CIRCUIT OVERCURRENT LOW
SIDE
P0204-CYLINDER 4-INJECTOR CIRCUIT CURRENT DECREASE
P0204-CYLINDER 4-INJECTOR CIRCUIT LOAD DROP
P0204-CYLINDER 4-INJECTOR CIRCUIT OVERCURRENT HIGH
SIDE
P0204-CYLINDER 4-INJECTOR CIRCUIT OVERCURRENT LOW
SIDE
Test Note:
All symptoms listed above are diagnosed using the same tests.
The title for the tests will be P0201-CYLINDER 1-INJECTOR
CIRCUIT CURRENT DECREASE.
When Monitored and Set Condition:
P0201-CYLINDER 1-INJECTOR CIRCUIT CURRENT DECREASE
When Monitored:
With the engine running.
Set Condition:
The ECM detects an incorrect rate of current decrease after injection
occurs.
P0201-CYLINDER 1-INJECTOR CIRCUIT LOAD DROP
When Monitored:
With the engine running.
Set Condition:
The ECM detects insufficient current through the injector driver when on.
47
DRIVEABILITY - DIESEL
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