13A-14
MPI – TROUBLESHOOTING
MUT-II/III Service data
• No.25: atmospheric sensor
(Ref: P13A-83) *
Temporary malfunction (Ref
Section 00: Dealing with
temporary malfunctions)
Check connector C-50
Check connector C-50
Check connector C-49
Check connector B-08
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Inspect the harness between the
AFS and the engine ECU
• Check if the power supply wire
has short circuited
Temporary malfunction (Ref
Section 00: Dealing with
temporary malfunctions)
Temporary malfunction (Ref
Section 00: Dealing with
temporary malfunctions)
Inspect the harness between the
AFS and the engine ECU, repair
if necessary
• Check if the power supply wire
is cut
MUT-II/III Service data
• No.25: atmospheric sensor
(Ref: P13A-83) *
Inspect the harness between the
AFS and the engine ECU
• Check if the earth wire is cut or
damaged
MUT-II/III Service data
• No.25: atmospheric sensor
(Ref: P13A-83) *
Replace the engine ECU
Replace the engine ECU
Measurement at B-08 AFS
connector
• Undo the connector and
measure on the harness side.
(1) Voltage across earth at 1
(ignition switch: ON)
OK: 4.9~5.1V
(2) Resistance across earth at 5
OK: Less than 2Ω
Measurement at C-50 engine
ECU connector
• Measure the voltage at the
engine ECU terminals
• Ignition switch: ON
•Voltage across earth at 42
OK: 4.9~5.1V
*: Refer to the 03-1 Service Manual for the Lancer Evolution VIII (No.1036K07)
Code No.P2226 Atmospheric pressure sensor system Probable cause of the malfunction
Conditions for inspection
• Ignition switch: ON
•Wait for 2 seconds after the ignition switch has been turned on or the
engine has started.
Evaluation conditions
•Output voltage from the sensor is more than 4.5V (when atmospheric
pressure is in excess of 114kPa) for 4 seconds.
Or,
•Output voltage from the sensor is more than 0.2V (when atmospheric
pressure is less than 5kPa) for 4 seconds.
• Malfunction of the atmospheric pressure
sensor
• Broken circuit or short circuit in the
atmospheric pressure sensor circuit, or poor
connector contact
• Malfunction of engine ECU
NG
OK
OK
NG
(1) NG
(2) NG
OK
Repair
Repair
Repair
Repair
OK
NG
OK
OK
NG
OK
OK
NG
OK
OK
NG
NG
NG
NG
OK
NG
Repair
Repair
