Technical information

13A-7
MPI – TROUBLESHOOTING
3. INSPECTION PROCEDURES FOR EACH DIAGNOSIS CODE
MUT-II/III service data
• No.95 atmospheric pressure
sensor
(Ref: P13A-24)
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Measurements taken at
C-50 engine ECU connector
•Measure engine ECU terminal
voltage
•Ignition switch: ON
•Voltage across earth at 42
OK: 4.9~5.1V
Check connector C-50
Inspect the harness between the
MAP sensor and the engine ECU.
• Check if the power supply has
short circuited.
MUT-II/III service data
• No.95: MAP sensor
(Ref: P13A-24)
Replace the engine ECU
Check connector C-50
Inspect the harness between the
MAP sensor and the engine ECU.
• Check if earth wire is cut or
damaged.
MUT-II/III service data
• No.95: MAP sensor
(Ref: P13A-24)
Replace the engine ECU
Check connector C50
Inspect the harness between the
MAP sensor and the engine ECU,
repair if necessary.
•Check if the power supply wire is
cut.
Temporary malfunction (Ref
Section 00: Dealing with
temporary malfunctions)
Measurements taken at the B-135
MAP sensor connector
• Undo the connector, and take
measurements using the
harness
(1) Voltage across earth at 3
(ignition switch: ON)
OK: 4.9~5.1V
(2) Resistance across earth at 2
OK: 2Ω or less
Temporary malfunction (Ref
Section 00: Dealing with
temporary malfunctions)
Check connector B-135
NG
(2) NG
(1) NG
OK
NG
OK
OK
Temporary malfunction (Ref
Section 00: Dealing with
temporary malfunctions)
NG
OK
NG
OK
OK
NG
OK
NG
OK
NG
Repair
NG
OK
OK
NG
NG
OK
Repair
Repair
Repair
Repair
Repair
Code No. P0105 MAP sensor system Probable cause of the malfunction
Conditions for the inspection
• Ignition switch: ON
• Wait for 2 seconds after the ignition switch has been turned on or the
engine has started.
Evaluation conditions
• Sensor output voltage is 4.6V or more for 4 seconds (when atmospheric
pressure is more than 313 kPa)
• Sensor output voltage is 0.2V or less for 4 seconds (when atmospheric
pressure is more than 14 kPa)
• MAP sensor malfunction
• Broken circuit or short circuit in the MAP
sensor circuit
• Poor connector contact
• Engine ECU malfunction