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Mitsubishi Outlander XL. Manual - part 324

DTC SET CONDITIONS

Logic Flow Chart

AK603434

Yes

Continuous

failure for 10 secs

Start

End

Yes

Malfunction

Good

Monitoring

conditions

Output voltage

< 1.0v

Output voltage

> 4.0v

Yes

Logic Flow Chart

AA00

Check Conditions

｠

Intake air temperature is greater than 5°C (41°F).

｠

Engine speed is 1,600 r/min or greater.

｠

Volumetric efficiency is between 20 and 70 percent.

Judgement Criteria

｠

When the evaporative emission purge solenoid is
off, the fuel differential pressure sensor output
voltage remains 1.0 volt or less for ten seconds.

Check Conditions

｠

Intake air temperature is between 5°C (41°F) and
45°C (113°F) or greater.

｠

Engine speed is 1,600 r/min or greater.

｠

Volumetric efficiency is between 20 and 70 percent.

Judgement Criteria

｠

When the evaporative emission purge solenoid
valve is fully operational (100 percent ratio), the fuel
differential pressure sensor output voltage remains
at 4.0 volts or greater for ten seconds.

OBD-ll DRIVE CYCLE PATTERN
Refer to Diagnostic Function - OBD-ll Drive Cycle -
Pattern 5 P.13Ab-8.

TROUBLESHOOTING HINTS (THE MOST LIKELY
CAUSES FOR THIS CODE TO BE SET ARE:)

｠

Connector damage.

MULTIPORT INJECTION SYSTEM (MFI) <DIAGNOSIS>

13Ab-491

DIAGNOSTIC TROUBLE CODE PROCEDURES

｠

Harness damage.

｠

Fuel tank differential pressure sensor failed.

｠

ECM failed.

OVERVIEW OF TROUBLESHOOTING

｠

DTC P0450 can be set by a faulty fuel tank
differential pressure sensor or related circuit, or
ECM failure.

｠

To check for system blockage, do a performance
test which uses a mechanical vacuum gauge and
scan tool MB991958 set on the fuel tank differential
pressure  sensor  (TANK  PRS  SNSR  73).  The
mechanical  gauge  reading  is  used  to  verify  scan
tool  MB991958  reading.  A  comparison  of  the
mechanical  gauge  with  the  reading  on  scan  tool
MB991958 will locate a problem in the system.

DIAGNOSIS

Required Special Tools:

｠

MB991958: Scan Tool (M.U.T.-III Sub Assembly)

｠

MB991824: V.C.I.

｠

MB991827: M.U.T.-III USB Cable

｠

MB991910: M.U.T.-III Main Harness A

｠

MB992110: Power Plant ECU Check Harness

STEP 1. Using scan tool MB991958, check data list item 52:
Fuel Tank Differential Pressure Sensor.

ZC501967

AC404789

ZC501968

MB991824

MB991827

MB991910

Data link

connector

AA00

To prevent damage to scan tool MB991958, always turn the
ignition switch to the "LOCK" (OFF) position before
connecting or disconnecting scan tool MB991958.

(1)

Connect scan tool MB991958 to the data link connector.

ZK603402

Hose C

Plug

AA00

(2)

Disconnect hose C from the evaporative emission canister,
and plug the hose.

(3)

Turn the ignition switch to the "ON" position.

(4)

Remove the fuel cap.

(5)

Set scan tool MB991958 to the data reading mode.

｠

Item 52, Fuel Tank Differential Pressure Sensor.

｠

The fuel tank pressure reading on the scan tool should
be 2050 to 2950 mV.

13Ab-492

MULTIPORT INJECTION SYSTEM (MFI) <DIAGNOSIS>

DIAGNOSTIC TROUBLE CODE PROCEDURES

ZK603403AA00

(6)

Connect the evaporative emission system pressure pump
(Miller number 6872A) to the fuel tank filler tube by using fuel
tank adapter (MLR-8382) and pressurize the fuel tank.

｠

The fuel tank pressure reading should increase.

(7)

Turn the ignition switch to the "LOCK" (OFF) position. Then
disconnect scan tool MB991958.

(8)

Remove the evaporative emission system pressure pump
(Miller number 6872A) and the fuel tank adapter (MLR-8382),
and reinstall the fuel cap.

(9)

Connect hose C to the evaporative emission canister.

Q:Is the fuel tank pressure between 2,050 and 2,950 mV?

YES:

It can be assumed that this malfunction is

intermittent (Refer to GROUP 00, How to Use
Troubleshooting/Inspection Service Points - How to Cope
with Intermittent Malfunctions P.00-15).

NO:

Go to Step 2.

STEP 2. Check harness connector B-11 at ECM and harness
connector D-19 at fuel tank differential pressure sensor for
damage.

Q:Is the harness connector in good condition?

YES:

Then go to Step 3.

NO:

Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection P.00E-2. Then go to Step 7.

STEP 3. Measure the 5-volt reference signal at fuel tank
differential pressure sensor connector D-19.

(1)

Remove the second seat assembly (Refer to GROUP 52A,
Second Seat Assembly P.52A-21).

ZK603415

Floor inspection lid (LH)

AA00

(2)

Remove the floor inspection lid (LH).

(3)

Disconnect fuel tank differential pressure sensor connector
D-19.

(4)

Turn the ignition switch to the "ON" position.

ZK603416

AA00

D-19 Harness
connector:
component side

(5)

Measure the voltage between terminal 3 and ground.

｠

The voltage should measure between 4.9 and 5.1 volts.

(6)

Turn the ignition switch to the "LOCK" (OFF) position.

Q:Is the measured voltage between 4.9 and 5.1 volts?

YES:

Go to Step 5.

NO:

Go to Step 4.

MULTIPORT INJECTION SYSTEM (MFI) <DIAGNOSIS>

13Ab-493

DIAGNOSTIC TROUBLE CODE PROCEDURES

STEP 4. Measure the 5-volt reference signal at ECM
connector B-11 by using check harness special tool
MB992110.

ECM

ZK603234AA00

Body side harness

MB992110

(1)

Disconnect all ECM connectors. Connect the power plant
ECU check harness special tool MB992110 between the
separated connectors.

(2)

Turn the ignition switch to the "ON" position.

(3)

Remove the fuel cap.

ZK603417

81 80 79 78 77 76 75 74 73 72

93 92 91 90 89 88 87 86 85 84

99 98 97 96

100

101

102

103

104

105

106

112

113

114

109 108

107

110

111

115

116

117

118

Special tool 48-pin connector
component side

AA00

(4)

Measure the voltage between terminal 114 and ground.

｠

The voltage should measure between 2.0 and 3.0 volts.

(5)

Turn the ignition switch to the "LOCK" (OFF) position.

Q:Is the measured voltage between 2.0 and 3.0 volts?

YES:

Check harness connector C-129 at intermediate

connector for damage, and repair or replace as required.
Refer to GROUP 00E, Harness connector Inspection P.
00E-2. If intermediate connector C-129 is in good
condition, repair it because of harness damage fuel tank
differential pressure sensor connector D-19 (terminal No.
3) and ECM connector B-11 (terminal No. 114). Then go to
Step 7.

NO:

Replace the ECM. When the ECM is replaced, register

the ID code. Refer to GROUP 42B, ID Code Registration
Judgment Table <Vehicles with KOS> P.42B-12or GROUP
42C, ID Code Registration Judgment Table <Vehicles with
WCM> P.42C-8. Then go to Step 7.

STEP 5. Check the harness wire between ECM connector
B-11 and fuel tank differential pressure sensor connector
D-19 for damage.

(1)

Disconnect the connector B-11 and D-19 measure at the
harness side.

13Ab-494

MULTIPORT INJECTION SYSTEM (MFI) <DIAGNOSIS>

DIAGNOSTIC TROUBLE CODE PROCEDURES

Content .. 322 323 324 325 ..