Chrysler 2005 Crossfire SRT6 Service Manual page 2393

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(P0451) FUEL TANK PRESSURE SENSOR PERFORMANCE (CONTINUED)
When Monitored and Set Condition
• When Monitored: With the engine running at idle speed.
• Set Condition: Low limit: The Fuel Tank Pressure Sensor voltage is less than 0.1 volt for 10 seconds. High
limit: The Fuel Tank Pressure Sensor voltage is greater than 4.7 volts for 10 seconds. Signal curve: The Fuel
Tank Pressure Sensor Performance code will be set if the signal remains constant.
FUEL TANK PRESSURE SENSOR SIGNAL CIRCUIT SHORT TO VOLTAGE
FUEL TANK PRESSURE SENSOR SIGNAL CIRCUIT OPEN
FUEL TANK PRESSURE SENSOR SIGNAL CIRCUIT SHORT TO GROUND
FUEL TANK PRESSURE SENSOR SIGNAL CIRCUIT SHORT TO SENSOR GROUND CIRCUIT
FUEL TANK PRESSURE SENSOR SIGNAL CIRCUIT SHORT TO 5-VOLT SUPPLY CIRCUIT
5-VOLT SUPPLY CIRCUIT SHORT TO VOLTAGE
5-VOLT SUPPLY CIRCUIT OPEN
5-VOLT SUPPLY CIRCUIT SHORT TO GROUND
5-VOLT SUPPLY CIRCUIT SHORT TO SENSOR GROUND CIRCUIT
SENSOR GROUND CIRCUIT OPEN
FUEL TANK PRESSURE SENSOR
POWERTRAIN CONTROL MODULE
For a complete Powertrain Control Module Circuit Diagram, (Refer to 9 - ENGINE - SCHEMATICS AND DIA-
GRAMS).
Diagnostic Test
1.
PRE-DIAGNOSTIC CHECK OUT
Note: Always perform diagnostics with a fully charged battery.
Note: Check connectors — Clean/repair as necessary. Poor pin to
terminal connections can set DTCs.
Note: Check for applicable TSBs related to the problem.
Turn the ignition on.
With the DRB III , read PCM DTCs.
Using the wiring diagram/schematic as a guide, inspect the wiring and
connectors. Repair as necessary.
Perform this procedure prior to symptom diagnosis.
Continue
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ENGINE - ELECTRICAL DIAGNOSTICS 9 - 469
POSSIBLE CAUSES