Transmission; P0120-Throttle Position Sensor Signal Circuit - Chrysler PT Cruiser 2001 Service Manual Supplement

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 code 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).
INTERMITTENT WIRING & CONNECTORS CONDITIONS
RELATED PCM DTC'S PRESENT
TPS VOLTAGE CHANGE NOT SMOOTH
TCM P-0120
SENSOR GROUND CIRCUIT OPEN TO TCM
TPS SIGNAL CIRCUIT OPEN TO TCM
TEST
1 Check fluid level and condition and adjust as necessary
Visually inspect connectors and wiring harness. Repair as necessary.
Check for leaks or other visible damage. Repair as necessary.
Perform the shift lever position test and adjust the linkage as necessary.
Connect a battery charger to the vehicle. Ensure the battery is fully charged.
With the DRBIII , read the PCM DTC's. Check and repair all PCM DTC's before
performing transmission diagnostics.
With the DRBIII , read the TCM DTC's.
Note: Check 1 trip failures and diagnose them as DTC's (Hard codes)
If you have a Gear Ratio DTC, check and record all CVI's.
Most DTC's set on start up but some must be set by driving the vehicle.
Note: Verify flash level of transmission controller. Some problems are
corrected by software upgrades to the transmission controller.
NOTE: Check for applicable TSB's related to the problem.
Perform this procedure prior to symptom diagnosis.
Continue
2 Start the engine. Allow the engine to idle.
With the DRBIII , Check the Throttle Position Sensor Voltage under Transmission
sensors.
Is the Throttle Position Sensor voltage below 0.3 or above 1.0 volts?
Yes → Go To 3
→ Go To 7
No
POSSIBLE CAUSES
ACTION
Go To 2
26
APPLICABILITY
All
All