TEST
ACTION
APPLICABILITY
2
Start the engine.
With the DRBIII
t, monitor the MAP Sensor voltage.
Snap the throttle.
Does the MAP Sensor voltage start below 2.0 volts at idle and go above 3.5 volts at
wide open thrott
All
Yes
→
Go To
3
No
→
Go To
11
3
Turn the ignition on.
With the DRBIII
t, monitor the Throttle Position Sensor voltage while slowly
depressing the throttle pedal from the idle position to the wide open throttle position.
Does voltage start approximately .08 volts and go above 3.5 volts with a smooth
voltage change?
All
Yes
→
Go To
20
No
→
Go To
4
4
Turn the ignition off.
Disconnect the Throttle Position Sensor harness connector.
Disconnect the PCM harness connector(s).
Measure the resistance of the 5 Volt Supply circuit from the Throttle Position Sensor
harness connector to the PCM harness connector.
Is the resistance below 5.0 ohms?
All
Yes
→
Go To
5
No
→
Repair the 5 Volt Supply circuit for high resistance.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
5
Turn the ignition off.
Disconnect the Throttle Position Sensor harness connector.
Disconnect the PCM harness connector(s).
Measure the resistance of the 5 Volt Supply circuit from the Throttle Position Sensor
harness connector to ground.
Is the resistance above 100k ohms?
All
Yes
→
Go To
6
No
→
Repair the 5 Volt Supply circuit for high resistance to ground.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
6
Turn the ignition off.
Disconnect the Throttle Position Sensor harness connector.
With the DRBIII
t, monitor the Throttle Position Sensor voltage.
Turn the ignition on.
Connect a jumper wire between the Throttle Position Sensor Signal circuit and the
Sensor ground circuit .
Does the DRBIII
t display Throttle Position voltage from approximately 4.9 volts to
below 0.5 volt?
All
Yes
→
Replace the Throttle Position Sensor.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
No
→
Go To
7
85
DRIVEABILITY - GAS
P0121-TPS VOLTAGE DOES NOT AGREE WITH MAP —
Continued