TEST
ACTION
APPLICABILITY
3
Turn the ignition off.
Disconnect the Throttle Position Sensor harness connector.
Turn the ignition on.
Measure the voltage of the Throttle Position Sensor Signal circuit in the Throttle
Position Sensor harness connector.
Is the voltage above 5.2 volts?
All
Yes
→
Repair the Throttle Position Sensor Signal circuit for a short to
battery voltage.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
No
→
Go To
4
4
Turn the ignition off.
Disconnect the Throttle Position Sensor harness connector.
Connect a jumper wire between the Throttle Position Sensor Signal circuit and the
Sensor ground circuit.
With the DRBIII
t, monitor the Throttle Position Sensor voltage.
Turn the ignition on.
Is the voltage below 0.5 volts?
All
Yes
→
Replace the Throttle Position Sensor.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
No
→
Go To
5
5
Turn the ignition off.
Disconnect the Throttle Position Sensor harness connector.
Measure the resistance of the Sensor ground circuit in the Throttle Position Sensor
harness connector to ground.
Is the resistance below 30 ohms?
All
Yes
→
Go To
6
No
→
Repair the Sensor ground circuit for an open.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
6
Turn the ignition off.
Disconnect the Throttle Position Sensor harness connector.
Disconnect the PCM harness connector.
Measure the resistance of the Throttle Position Sensor Signal circuit between the
Throttle Position Sensor harness connector and the PCM harness connector.
Is the resistance below 5 ohms?
All
Yes
→
Go To
7
No
→
Repair the Throttle Position Sensor Signal circuit for an open.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
7
If there are no possible causes remaining, view repair.
All
Repair
Replace the Powertrain Control Module.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
65
DRIVEABILITY - GAS
P0123-THROTTLE POSITION SENSOR VOLTAGE HIGH —
Continued