Chrysler 2005 Crossfire SRT6 Service Manual page 2395

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(P0451) FUEL TANK PRESSURE SENSOR PERFORMANCE (CONTINUED)
4.
MEASURE THE FUEL TANK PRESSURE SENSOR SIGNAL CIRCUIT VOLTAGE
Turn the ignition off.
Disconnect the Fuel Tank Pressure Sensor harness connector.
Note: Check connectors — Clean/repair as necessary.
Turn the ignition on.
Measure the voltage of the Fuel Tank Pressure Sensor Signal circuit at
the Fuel Tank Pressure Sensor harness connector.
Is the voltage between 4.7 and 5.2 volts?
Yes >> Go To 5
No >> If the voltage is above 5.2 volts, Go To 11
If the voltage is below 4.7 volts, Go To 12
5.
MEASURE THE 5-VOLT SUPPLY CIRCUIT VOLTAGE
With the ignition on.
Measure the voltage of the 5-Volt Supply circuit at the Fuel Tank Pres-
sure Sensor harness connector.
Is the voltage between 4.7 and 5.2 volts?
Yes >> Go To 6
No >> If the voltage is above 5.2 volts, Go To 9
If the voltage is below 4.7 volts, Go To 10
6.
FUEL TANK PRESSURE SENSOR SIGNAL CIRCUIT SHORT TO 5-VOLT SUPPLY CIRCUIT
Turn the ignition off.
Disconnect the PCM C4 harness connector.
Note: Check connectors — Clean/repair as necessary.
Measure the resistance between the 5-Volt Supply circuit and the Fuel
Tank Pressure Sensor Signal circuit at the Fuel Tank Pressure Sensor
harness connector.
Is the resistance above 100 kohms?
Yes >> Go To 7
No >> Repair the Fuel Tank Pressure Sensor Signal circuit for a
short to the 5-Volt Supply circuit.
Perform POWERTRAIN VERIFICATION TEST - VER 2.
ENGINE - ELECTRICAL DIAGNOSTICS 9 - 471