Mitsubishi Eclipse. Manual - part 168

 

  Index      Mitsubishi     Mitsubishi Eclipse - service repair manual 2004 year

 

Search            

 

 

 

 

 

 

 

 

 

Content   ..  166  167  168  169   ..

 

 

Mitsubishi Eclipse. Manual - part 168

 

 

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L>

13A-165

.

CIRCUIT OPERATION

• A 5-volt power supply is applied on the throttle 

position sensor power terminal (terminal No. 3) 
from the ECM (terminal No. 81) <M/T> or PCM 
(terminal No. 46) <A/T>. 
The ground terminal (terminal No. 2) is grounded 
with ECM (terminal No. 92) <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 throttle position sensor out-
put terminal (terminal No. 3) and ground terminal 
will increase according to the rotation. 

.

TECHNICAL DESCRIPTION

• The throttle position sensor 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. 

.

DESCRIPTIONS OF MONITOR METHODS
Compare load value with throttle position sensor out-

put voltage.

.

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)

• Volume airflow sensor

.

AK300060

PCM

CONNECTORS: C-54, C-57 <A/T>

AI

C-57 (GR)

C-54 (GR)

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L>

13A-166

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 higher than 2,000 r/min.

• Volumetric efficiency is higher than 60 percent.

Judgement Criteria

• Throttle position sensor output voltage has con-

tinued to be 0.8 volt or lower for 2 seconds.

.

START

ENGINE SPEED > 2000rpm

LOAD VALUE > 60%

END

NO

NO

NO

NO

YES

YES

YES

YES

MALFUNCTION

GOOD

OUTPUT VOLTAGE

< 0.8V

MONITORING
CONDITIONS

CONTINUOUS

FAILURE FOR 2 secs

AK301427

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L>

13A-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

• Throttle position sensor output voltage has con-

tinued 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 

− Other Monitor 

P.13A-5

.

.

TROUBLESHOOTING HINTS (The most likely 
causes for this code to be set are: )

• Throttle position sensor failed or maladjusted.

• Open throttle position sensor 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) <2.4L>

13A-168

DIAGNOSIS

Required Special Tools:

• MB991958 (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 

P.00-6

.

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 

P.00E-2

. Then go to Step 14.

AK300810

AB

MB991911

16-PIN

MB991827

MB991824 

AK300402

2 1

3

4

CONNECTOR: B-07

AB

B-07 (B)

HARNESS CONNECTOR:
COMPONENT SIDE

 

 

 

 

 

 

 

Content   ..  166  167  168  169   ..