Chrysler PT Cruiser 2001 Service Manual Supplement page 2776

TRANSMISSION
P0120-THROTTLE POSITION SENSOR SIGNAL CIRCUIT —
TEST
7 With the DRB, check Powertrain Control Module DTC's.
Are any of the following P-codes stored in the PCM?
P-0122
P-0123
P-0121
→ Go To 8
No
8 Turn the ignition on.
With the DRBIII , read TPS VOLTS.
While monitoring the DRBIII , slowly open and close the Throttle.
Is the voltage change smooth?
Yes → Go To 9
→ Replace the Throttle Position Sensor.
No
9 The conditions necessary to set this DTC are not present at this time.Using the
schematics as a guide, inspect the wiring and connectors specific to this circuit.
Wiggle the wires while checking for shorts and open circuits.
Pay particular attention to the the point where the TPS signal and sensor ground
circuits splice off from the engine circuits.
Were any problems found?
Yes → Repair defective wiring and/or connector as necessary.
→ Test Complete.
No
ACTION
Refer to the Driveability category for the related symptom(s).
Perform POWERTRAIN VERIFICATION TEST VER - 5.
Refer to the Driveability category for the related symptom(s).
Perform POWERTRAIN VERIFICATION TEST VER - 5.
Refer to the Driveability category for the related symptom(s).
Perform POWERTRAIN VERIFICATION TEST VER - 5.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
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Continued
APPLICABILITY
All
All
All