Mitsubishi Galant (2004+). Manual — part 814
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>
13A-73
STEP 2. Measure the sensor output voltage at Manifold
Absolute pressure sensor connector B-02 by backprobing.
(1) Do not disconnect the connector B-02.
(2) Turn the ignition switch to the "ON" position.
(3) Measure the voltage between terminal No. 1 and ground by
backprobing.
• When altitude is 0 m (0 foot), voltage should be 3.7 and
4.3 volts.
• When altitude is 600 m (1,969 feet), voltage should be
3.4 and 4.0 volts.
• When altitude is 1,200 m (3,937 feet), voltage should be
3.2 and 3.8 volts.
• When altitude is 1,800 m (5,906 feet), voltage should be
2.9 and 3.5 volts.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is measured the voltage normal?
YES : Go to Step 10.
NO : Go to Step 3.
STEP 3. Measure the sensor supply voltage at manifold
absolute pressure sensor connector B-02 by backprobing.
(1) Do not disconnect the connector B-02.
(2) Turn the ignition switch to the "ON" position.
(3) Measure the voltage between terminal No. 3 and ground by
backprobing.
• Voltage should be between 4.9 and 5.1 volts.
(4) 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 6.
NO : Go to Step 4.
AK303809
1
2
3
AB
CONNECTOR: B-02
B-02 (B)
HARNESS CONNECTOR:
COMPONENT SIDE
3
2
1
AK203034
B-02 HARNESS
CONNECTOR:
HARNESS SIDE
AG
AK303809
1
2
3
AB
CONNECTOR: B-02
B-02 (B)
HARNESS CONNECTOR:
COMPONENT SIDE
3
2
1
AK203036
B-02 HARNESS
CONNECTOR:
HARNESS SIDE
AG
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>
13A-74
STEP 4. Check harness connector B-02 at the manifold
absolute pressure sensor and harness connector B-21 at
PCM for damage.
Q: Is the harness connector in good condition?
YES : Go to step 5.
NO : Repair or replace it. Refer to GROUP 00E, Harness
Connector Inspection
. Then go to Step 13.
AK303809
1
2
3
AB
CONNECTOR: B-02
B-02 (B)
HARNESS CONNECTOR:
COMPONENT SIDE
AK303018
55
56
54 53 52 51
57
62 61 60 59 58
63
69 68 67 66 65 64
70
75 74 73 72 71
76
82 81 80 79 78 77
83
CONNECTOR: B-21
PCM
AB
HARNESS CONNECTOR:
COMPONENT SIDE
AIR CLEANER
B-21 (B)
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>
13A-75
STEP 5. Check for harness damage between manifold
absolute pressure sensor connector B-02 (terminal No. 3)
and PCM connector B-21 (terminal No. 68).
Q: Is the harness wire in good condition?
YES : Go to Step 12.
NO : Repair it. Then go to Step 13.
AK303809
1
2
3
AB
CONNECTOR: B-02
B-02 (B)
HARNESS CONNECTOR:
COMPONENT SIDE
AK303018
55
56
54 53 52 51
57
62 61 60 59 58
63
69 68 67 66 65 64
70
75 74 73 72 71
76
82 81 80 79 78 77
83
CONNECTOR: B-21
PCM
AB
HARNESS CONNECTOR:
COMPONENT SIDE
AIR CLEANER
B-21 (B)
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>
13A-76
STEP 6. Measure the ground voltage at manifold absolute
pressure sensor connector B-02 by backprobing.
(1) Do not disconnect the connector B-02.
(2) Turn the ignition switch to the "ON" position.
(3) Measure the voltage between terminal No. 2 and ground by
backprobing.
• Voltage should be 0.5 volt or less.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the measured voltage 0.5 volt or less?
YES : Go to Step 9.
NO : Go to Step 7.
AK303809
1
2
3
AB
CONNECTOR: B-02
B-02 (B)
HARNESS CONNECTOR:
COMPONENT SIDE
3
2
1
AK203038
B-02 HARNESS
CONNECTOR:
HARNESS SIDE
AG
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