Mitsubishi Eclipse. Manual — part 409
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L>
13B-179
.
CIRCUIT OPERATION
• A 5-volt power supply is applied on the TPS
power terminal (terminal No. 4) from the ECM
(terminal No. 42) <M/T> or PCM (terminal No. 46)
<A/T>.
The ground terminal (terminal No. 1) is grounded
with ECM (terminal No. 49) <M/T> or PCM (termi-
nal No. 57) <A/T>.
• When the throttle valve shaft is turned from the
idle position to the fully opened position, the
resistor between the TPS output terminal (termi-
nal No. 3) and ground terminal will increase
according to the rotation.
.
TECHNICAL DESCRIPTION
• The TPS outputs voltage which corresponds to
the throttle valve opening angle.
• The ECM <M/T> or PCM <A/T> checks whether
the voltage is within a specified range. In addi-
tion, it checks that the voltage output does not
become too high while the engine is at idle.
.
DESCRIPTIONS OF MONITOR METHODS
throttle position sensor (main) output voltage is out of
specified range.
.
MONITOR EXECUTION
Continuous
.
MONITOR EXECUTION CONDITIONS (Other
monitor and Sensor)
Other Monitor (There is no temporary DTC stored
in memory for the item monitored below)
• Not applicable
Sensor (The sensor below is determined to be
normal)
• Not applicable
.
AK300091
CONNECTORS: C-58, C-62 <M/T>
ECM
AD
C-58 (GR)
C-62 (GR)
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L>
13B-180
DTC SET CONDITIONS
Logic Flow Chart
.
Check Conditions
• 2 seconds or more have passed since the start-
ing sequence was completed.
Judgement Criteria
• TPS output voltage has continued to be 0.2 volt
or lower for 2 seconds.
.
OBD-ll DRIVE CYCLE PATTERN
None.
.
TROUBLESHOOTING HINTS (The most likely
causes for this code to be set are: )
• TPS failed or maladjusted.
• Open or shorted TPS circuit, or loose connector.
• ECM failed. <M/T>
• PCM failed. <A/T>
DIAGNOSIS
Required Special Tools:
• MB991958: Scan Tool (MUT-III Sub Assembly)
• MB991824: V.C.I.
• MB991827: USB Cable
• MB991911: Main Harness B
START
END
NO
NO
YES
YES
MALFUNCTION
GOOD
CONTINUOUS
FAILURE FOR 2 secs
OUTPUT VOLTAGE
< 0.2V
NO
YES
MONITORING
CONDITIONS
AK301429
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L>
13B-181
STEP 1. Using scan tool MB991958, check data list item 14:
Throttle Position 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
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 : Go to Step 2.
STEP 2. Check connector B-07 at throttle position sensor
for damage.
Q: Is the connector in good condition?
YES : Go to Step 3.
NO : Repair or replace it. Refer to GROUP 00E, Harness
Connector Inspection
. Then go to Step 11.
AK300810
AB
MB991911
16-PIN
MB991827
MB991824
AK300434
2 1
3
4
CONNECTOR: B-07
AB
B-07 (B)
HARNESS CONNECTOR:
COMPONENT SIDE
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L>
13B-182
STEP 3. Check the sensor supply voltage at throttle
position sensor harness side connector B-07.
(1) Disconnect the connector B-07 and measure at the harness
side.
(2) Turn the ignition switch to the "ON" position.
(3) Measure the voltage between terminal No. 4 and ground.
• Voltage should be between 4.8 and 5.2 volts.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the measured voltage between 4.8 and 5.2 volts?
YES : Go to Step 6.
NO : Go to Step 4.
AK300434
2 1
3
4
CONNECTOR: B-07
AB
B-07 (B)
HARNESS CONNECTOR:
COMPONENT SIDE
AK000236 AG
B-07 HERNESS
CONNECTOR:
COMPONENT SIDE
4 3 2 1
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