13A-15
MPI – TROUBLESHOOTING
Continued from previous page
Measurements taken at B-08 AFS
connector
• Only connect the test harness
(MB991709) to terminals
No.1, No.2 and No.5 of the
connector and measure at the
pick up harness component.
• Ignition switch: ON
(1) Voltage across earth at 1
OK: 4.9~5.1V
(2) Voltage across earth at 2
OK: altitude 0m 3.8~4.2V
altitude 600m 3.5~3.9V
altitude 1200m 3.3~3.7V
altitude 1800m 3.0~3.4V
*: Refer to the 03-1 Service Manual for the Lancer Evolution VIII (No.1036K07)
Replace the AFS
Check connector C-50
Replace the engine ECU
Inspect the harness between AFS
and engine ECU, repair if
necessary
• Check if the output wire is cut or
damaged
Temporary malfunction (Refer to
Section 00: Dealing with
temporary malfunctions)
Check connectors C-49 & C-50
Inspect the harness between AFS
and engine ECU
• Check if the output wire has
short circuited or is damaged
Inspect the harness between AFS
and engine ECU, repair if
necessary
• Check if the power supply wire
is damaged
MUT-II/III Service data
• No.25: atmospheric sensor
(Ref: P13A-83) *
Measurement at the C-50 engine
ECU connector
• Measurement of the terminal
voltage of the engine ECU
• Ignition switch: ON
•Voltage across earth at 51
OK: altitude 0m 3.8~4.2V
altitude 600m 3.5~3.9V
altitude 1200m 3.3~3.7V
altitude 1800m 3.0~3.4V
Check connector C-50
Check connector C-50
OK
OK
OK
OK
OK
NG
(1) NG
(2) NG
NG
NG
OK
NG
NG
NG
OK
OK
OK
NG
Repair
Repair
Repair
Repair
Repair
