MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L>
13B-102
STEP 13. Using scan tool MB991502, check data list item
14: Throttle Position Sensor.
CAUTION
To prevent damage to scan tool MB991502, always turn the
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991502.
(1) Connect scan tool MB991502 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) Set scan tool MB991502 to the data reading mode for item
14, Throttle Position Sensor.
•
With the throttle valve in the idle position, voltage should
be between 0.535 and 0.735 volt.
•
With the throttle valve in the full-open position, voltage
should be between 4.5 and 5.5 volts.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the sensor operating properly?
YES :
It can be assumed that this malfunction is intermittent.
Refer to GROUP 00, How to Use Troubleshooting/
Inspection Service Points
NO :
Replace the ECM or PCM. Then go to Step 14.
STEP 14. Test the OBD-II drive cycle.
(1) Carry out a test drive with the drive cycle pattern. Refer to,
Procedure 6
−
Other Monitor
(2) Check the diagnostic trouble code (DTC).
Q: Is the DTC P0121 is output?
YES :
Retry the troubleshooting.
NO :
The inspection is complete.
AKX01177
16 PIN
MB991502
AB
