Mitsubishi Eclipse. Manual — part 406
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L>
13B-167
DTC SET CONDITIONS <Range/Performance problem-relation between main and sub>
Logic Flow Chart
Check Conditions
• 2 seconds or more have passed since the staring
sequence was completed.
• Engine speed is lower than 3,000 r/min.
• Volumetric efficiency is lower than 30 percent.
Judgement Criteria
• TPS output voltage has continued to be 4.6 volts
or higher for 2 seconds.
.
OBD-ll DRIVE CYCLE PATTERN
Refer to , Diagnostic Function
− OBD-ll Drive Cycle −
Procedure 6
.
.
TROUBLESHOOTING HINTS (The most likely
causes for this code to be set are: )
• TPS failed or maladjusted.
• Open TPS circuit harness damage, or connector
damage.
• ECM failed. <M/T>
• PCM failed. <A/T>
START
ENGINE SPEED < 3000rpm
LOAD VALUE < 30%
END
NO
NO
NO
NO
YES
YES
YES
YES
MALFUNCTION
GOOD
MONITORING
CONDITIONS
CONTINUOUS
FAILURE FOR 2 secs
OUTPUT VOLTAGE
> 4.6V
AK301428
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L>
13B-168
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 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 14.
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-169
STEP3. Check the throttle position sensor.
(1) Disconnect the connector B-07.
(2) Measure the resistance between throttle position sensor
side connector terminal No. 1 and No. 4.
Standard value: 3.5
− 6.5 kΩ
(3) Measure resistance between the throttle position sensor
side connector terminal No. 1 and No. 3.
(4) Move the throttle valve from the idle position to the full-open
position.
• Resistance should change smoothly in proportion to the
opening angle of the throttle valve.
Q: Is the resistance normal?
YES : Go to Step 4.
NO : Replace the throttle position sensor. Refer to
, Throttle Body. Then go to Step 14.
STEP 4. 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 7.
NO : Go to Step 5.
AK300434
2 1
3
4
CONNECTOR: B-07
AB
B-07 (B)
HARNESS CONNECTOR:
COMPONENT SIDE
AKX01413
THROTTLE POSITION
SENSOR SIDE CONNECTOR
1 2 3 4
AB
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
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L>
13B-170
STEP 5. Check connector C-58 at ECM <M/T> or connector
C-55 at PCM <A/T> for damage.
Q: Is the connector in good condition?
YES : Go to Step 6.
NO : Repair or replace it. Refer to GROUP 00E, Harness
Connector Inspection
. Then go to Step 14.
AK300462
42
43
48
49
50
51
52
53
54
55
56
57
46 45 44
58
59
60
61
62
63
64
65
66
47
41
CONNECTOR: C-55 <A/T>
C-55 (GR)
AB
HARNESS CONNECTOR:
COMPONENT SIDE
AK300748
65
43
50
42
49
41
48
60
61
64
46
47
58
59
67
68
45
56
66
52 51
44
53
62
54
63
57
55
CONNECTOR: C-58 <M/T>
AB
C-58 (GR)
HARNESS CONNECTOR:
COMPONENT SIDE
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