Chrysler 2005 Crossfire SRT6 Service Manual page 2002

9 - 78 ENGINE - ELECTRICAL DIAGNOSTICS
(P0120) ELECTRONIC THROTTLE CONTROL MOTOR PERFORMANCE (CONTINUED)
4.
CHECK THE TP SENSOR SIGNAL CIRCUITS
Turn the ignition off.
Disconnect the Throttle Body harness connector.
Note: Check connectors — Clean/repair as necessary.
Turn the ignition on.
With the DRB III , monitor the TP 1 and TP 2 voltages.
Connect a jumper wire between the Sensor Ground circuit and the TP
Sensor Signal 1 circuit at the Throttle Body harness connector.
TP Sensor 1 voltage should change from approximately 5 volts to 0.5
volt?
For TP Sensor 2, connect a jumper wire between the 5-Volt Supply
circuit and the TP Sensor Signal 2 circuit at the Throttle Body harness
connector.
TP Sensor 2 voltage should change from approximately 0 volts to 5.0
volts?
Note: Remove the jumper wire before continuing.
Are the TP 1 and TP 2 voltage readings within the listed specifications?
Yes >> Go To 5
No >> Go To 10
5.
MEASURE THE VOLTAGE OF THE THROTTLE CONTROL MOTOR CIRCUITS
With the ignition on.
Measure the voltage of the Throttle Control Motor 1 and the Throttle
Control Motor 2 circuits at the Throttle Body harness connector.
Is the voltage between 3.1 and 3.5 volts on both circuits?
Yes >> Replace the Throttle Body. (Refer to 14 - FUEL SYSTEM/
FUEL INJECTION/THROTTLE BODY - REMOVAL).
No >> If the voltage is above 3.5 volts, Go To 6
If the voltage is below 3.1 volts, Go To 7
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