Mitsubishi Eclipse. Manual - part 484
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L>
13B-479
OBD-ll DRIVE CYCLE PATTERN
Refer to Diagnostic Function
− OBD-ll Drive Cycle −
Procedure 6
− Other Monitor
.
.
TROUBLESHOOTING HINTS (The most likely
causes for this code to be set are: )
• Fuel tank temperature sensor failed.
• Open or shorted fuel tank temperature sensor cir-
cuit harness damage, or connector damage.
• ECM failed. <M/T>
• PCM failed. <A/T>
NOTE: A diagnostic trouble code (DTC) could be
output if the engine coolant is changed as indicated
below. Because this is not a failure, the DTC must be
erased.
Make sure to test drive the vehicle in accordance
with the drive cycle pattern in order to verify that a
DTC will not be output.
.
•
The engine and the radiator have been flushed
repeatedly when the engine coolant temperature
was high (or the fuel tank temperature was high).
DIAGNOSIS
Required Special Tools:
• MB991958: Scan Tool (MUT-III Sub Assembly)
• MB991824: V.C.I.
• MB991827: USB Cable
• MB991911: Main Harness B
STEP 1. Using scan tool MB991958, check data list item
4A: Fuel Tank Temperature Sensor.
CAUTION
To prevent damage to scan tool MB991958, always turn the
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) Set scan tool MB991958 to the data reading mode for item
4A, Fuel Tank Temperature Sensor.
• Approximately the same as the ambient air temperature
when the engine is cooled.
(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 : Go to Step 2.
AK300810
AB
MB991911
16-PIN
MB991827
MB991824