Chrysler 300M 2002 Service Manual page 2827

TRANSMISSION
Symptom:
P0120-THROTTLE POSITION SENSOR SIGNAL CIRCUIT
When Monitored and Set Condition:
P0120-THROTTLE POSITION SENSOR SIGNAL CIRCUIT
When Monitored: Whenever the engine is running.
Set Condition: This DTC is set if the throttle angle goes out of range or if throttle angle
changes abruptly (i.e.: faster than the throttle body motion could occur). The DTC will also
set when the Transmission Control System is using calculated throttle angle from the
engine or if an Internal Error in the TCM forces the TCM to use 25 degrees of throttle
angle.
RELATED ENGINE DTC'S PRESENT
INTERMITTENT WIRING AND CONNECTORS
SENSOR GROUND CIRCUIT OPEN
TPS SIGNAL CIRCUIT OPEN
TPS VOLTAGE CHANGE NOT SMOOTH
PCM - THROTTLE POSITION SENSOR
TEST
1 NOTE: Low fluid level can be the cause of many transmission problems. If
the fluid level is low locate and repair the leak then check and adjust the
fluid level per the Service Information.
NOTE: Always perform diagnostics with a fully charged battery to avoid
false symptoms.
With the DRBIII , read Engine DTC's. Check and repair all Engine DTC's prior to
performing any transmission symptom diagnostics.
With the DRBIII , read Transmission DTC's. Record all DTC's and 1 Trip Failures.
NOTE: Diagnose 1 Trip Failures as a fully matured DTC.
Using the wiring diagram/schematic as a guide, inspect the wiring and connectors.
Repair as necessary.
Perform the Shift Lever Position Test. If the test does not pass, refer to Symptom test
for P0706 Check Shifter Signal.
For Gear Ratio DTC's, check and record all CVI's.
Most DTC's set on start up but some must be set by driving the vehicle such that all
diagnostic monitors have run.
NOTE: Verify flash level of Transmission Control Module. Some problems
are corrected by software upgrades to the Transmission Control Module.
NOTE: Check for applicable TSB's related to the problem.
Perform this procedure prior to Symptom diagnosis.
Continue
POSSIBLE CAUSES
ACTION
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APPLICABILITY
All