Chrysler PT Cruiser 2001 Service Manual Supplement page 2775

P0120-THROTTLE POSITION SENSOR SIGNAL CIRCUIT —
TEST
3 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
No
4 Turn the ignition off.
Disconnect the TPS harness connector.
Disconnect the TCM harness connector.
Note: Check connectors - Clean/repair as necessary.
Measure the resistance of the Sensor Ground circuit between the TPS harness
connector and the Transmission Control Module harness connector.
Is the resistance below 5.0 ohms?
Yes → Go To 5
No
5 Turn the ignition off.
Disconnect the Throttle Position Sensor harness connector.
Disconnect the Transmission Control Module harness connector.
Note: Check connectors - Clean/repair as necessary.
Measure the resistance of the TPS Signal Circuit from the TCM harness connector to
the TPS harness connector.
Is the resistance below 5.0 ohms?
Yes → Go To 6
No
6 If there are no possible causes remaining, replace the TCM.
View repair options.
Repair
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.
→ Go To 4
→ Repair the Sensor Ground circuit for an open.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
→ Repair the TPS signal circuit for an open.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
Replace the TCM.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
27
TRANSMISSION
Continued
APPLICABILITY
All
All
All
All