Chrysler 300M 2002 Service Manual page 2505

DRIVEABILITY - NGC
P0121-THROTTLE POSITION SENSOR #1 PERFORMANCE —
TEST
7 Turn the ignition off.
Disconnect the TPS harness connector.
Disconnect the PCM harness connector.
Measure the resistance between ground and the TPS Signal circuit at the TPS
harness connector.
Is the resistance above 100k ohms?
Yes → Go To 8
→ Repair the high resistance to ground in the TP Sensor Signal
No
8 Turn the ignition off.
Disconnect the TPS harness connector.
Disconnect the PCM harness connector.
CAUTION: DO NOT PROBE THE PCM HARNESS CONNECTORS. PROBING
THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI-
NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION. INSTALL
MILLER SPECIAL TOOL #8815 TO PERFORM DIAGNOSIS.
Measure the resistance of the Sensor ground circuit from the TPS harness connector
to the appropriate terminal of special tool #8815.
Is the resistance below 5.0 ohms?
Yes → Go To 9
→ Repair the high reistance in the Sensor ground circuit.
No
9 NOTE: Before continuing, check the PCM harness connector terminals for
corrosion, damage, or terminal push out. Repair as necessary.
If there are no possible causes remaining, review repair.
Repair
10 Ignition on, engine not running.
With the DRBIII , monitor the TPS voltage.
Slowly open the throttle 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
→ Replace the Throttle Position Sensor.
No
ACTION
circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 2.
Perform POWERTRAIN VERIFICATION TEST VER - 2.
Replace and program the Powertrain Control Module in accor-
dance with the Service Information.
Perform POWERTRAIN VERIFICATION TEST VER - 2.
Perform POWERTRAIN VERIFICATION TEST VER - 2.
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Continued
APPLICABILITY
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