Chrysler 2005 Crossfire SRT6 Service Manual page 2399

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(P0451) FUEL TANK PRESSURE SENSOR PERFORMANCE (CONTINUED)
13.
FUEL TANK PRESSURE SENSOR
Turn the ignition off.
Disconnect the Fuel Tank Pressure Sensor harness connector.
Note: Check connectors — Clean/repair as necessary.
Turn the ignition on.
Connect a fused jumper wire between the Fuel Tank Pressure Sensor
Signal circuit and the Fuel Tank Pressure Sensor 5-Volt Supply circuit.
With the DRB III , read the GAS TANK PRES DIFF.
Note: Remove the fused jumper wire when this step is complete.
Is the Fuel Tank Pressure above +30 hPa (0.435 psi)?
Yes >> Replace the Fuel Tank Pressure Sensor. (Refer to 14 -
FUEL SYSTEM/FUEL DELIVERY/FUEL LEVEL SENDING
UNIT / SENSOR - REMOVAL).
Perform POWERTRAIN VERIFICATION TEST - VER 2.
No >> Go To 14
14.
FUEL TANK PRESSURE SENSOR SIGNAL CIRCUIT SHORT TO GROUND
Turn the ignition off.
Disconnect the PCM C4 harness connector.
Note: Check connectors — Clean/repair as necessary.
Measure the resistance between ground and the Fuel Tank Pressure
Sensor Signal circuit.
Is the resistance above 100 kohms?
Yes >> Go To 15
No >> Repair the Fuel Tank Pressure Sensor Signal circuit for a
short to ground.
Perform POWERTRAIN VERIFICATION TEST - VER 2.
ENGINE - ELECTRICAL DIAGNOSTICS 9 - 475