Mitsubishi Galant. Manual - part 208
MULTIPORT FUEL INJECTION(MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L>
13B-57
TECHNICAL DESCRIPTION
•
The intake air temperature sensor converts the
intake air temperature to a voltage.
•
The PCM checks whether this voltage is within a
specified range.
DTC SET CONDITIONS
Check Conditions
•
Two seconds or more have passed since the
engine was started.
Judgement Criteria
•
Intake air temperature sensor output voltage has
continued to be 4.6 volts or higher [corresponding
to an air intake temperature of -45
°
C (-49
°
F) or
lower] for 2 seconds.
or
•
Intake air temperature sensor output voltage has
continued to be 0.2 volt or lower [corresponding
to an air intake temperature of 125
°
C (257
°
F) or
higher] for 2 seconds.
TROUBLESHOOTING HINTS (The most likely
causes for this code to be set are:)
•
Intake air temperature sensor failed.
•
Open or shorted intake air temperature sensor
circuit, or loose connector.
•
PCM failed.
DIAGNOSIS
Required Special Tools
MB991502: Scan Tool (MUT-II)
STEP 1. Using scan tool MB991502, check data list item 13:
Intake Air Temperature Sensor.
CAUTION
To prevent damage to scan tool MB991502, always turn the
ignition switch to the "LOCK"(OFF) position before
connecting 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
13, Intake Air Temperature Sensor.
•
The intake air temperature and temperature shown with
the scan tool should approximately match.
(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.
AC003081 AB
16 PIN
MB991502