Chrysler 300M 2002 Service Manual page 2503

DRIVEABILITY - NGC
Symptom:
P0121-THROTTLE POSITION SENSOR #1 PERFORMANCE
When Monitored and Set Condition:
P0121-THROTTLE POSITION SENSOR #1 PERFORMANCE
When Monitored: With the engine running and no MAP Sensor or TP Sensor DTC's set.
Set Condition: The PCM determines a valid range in which the TP Sensor should be, at
a given RPM/Load. The actual TP Sensor voltage is then compared to this value. If the TP
Sensor voltage does not fall within the expected range within a predetermined time an
error will be detected. One Trip Fault.
TPS SWEEP
INTERMITTENT CONDITION
RESISTANCE IN 5 VOLT SUPPLY CIRCUIT
RESISTANCE TO GROUND IN 5 VOLT SUPPLY CIRCUIT
TP SENSOR
RESISTANCE IN TP SENSOR SIGNAL CIRCUIT
RESISTANCE BETWEEN GROUND AND TP SENSOR SIGNAL CIRCUIT
RESISTANCE IN THE SENSOR GROUND CIRCUIT
PCM
TEST
1 NOTE: Diagnose any other TPS DTC(s) before continuing.
NOTE: The throttle plate and linkage should be free from binding and
carbon build up.
NOTE: Ensure the throttle plate is at the idle position.
Ignition on, engine not running.
With the DRBIII , read DTCs and record the related Freeze Frame data.
Is the Good Trip Counter displayed and equal to zero?
Yes → Go To 2
No
2 Ignition on, engine not running.
With the DRBIII , monitor the TPS voltage while slowly depressing the throttle
pedal from the idle position to the wide open throttle position.
Does voltage start at approximately 0.8 of a volt and go above 3.5 volts with a smooth
transition?
Yes → Go To 11
No
POSSIBLE CAUSES
ACTION
→ Go To 10
→ Go To 3
74
APPLICABILITY
All
All