Mitsubishi Lancer Evolution X. Manual - part 337
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-413
STEP 7. Measure the sensor supply voltage at ECM
connector B-09 by using power plant ECU check harness
special tool MB992110.
(1) Disconnect the all ECM connectors. Connect the power
plant ECU check harness special tool MB992110 between
the separated connectors.
(2) Disconnect the exhaust camshaft position sensor connector
B-05.
(3) Turn the ignition switch to the "ON" position.
(4) Measure the voltage between terminal No. 7 and ground.
• Voltage should be between 4.9 and 5.1 volts.
(5) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the measured voltage between 4.9 and 5.1 volts?
YES : Repair harness wire between exhaust camshaft
position sensor connector B-05 (terminal No. 3) and
ECM connector B-09 (terminal No. 7) because of
open circuit. Then go to Step 19.
NO : Go to Step 8.
STEP 8. Check for short circuit to ground between exhaust
camshaft position sensor connector B-05 (terminal No. 3)
and ECM connector B-09 (terminal No. 7).
Q: Is the harness wire in good condition?
YES : Replace the ECM. When the ECM is replaced,
register the ID code. Refer to GROUP 42B, ID Code
Registration Necessity Judgment Table <Vehicles
with KOS>
or GROUP 42C, ID Codes
Registration Judgment Table <Vehicles with WCM>
NO : Repair it. Then go to Step 19.
AK604040
ECM
AB
Body side harness
MB992110
AK604206
16 15 14 13 12 11 10 9 8 7 6 5 4 3
2
1
32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17
48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33
64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49
AB
Power plant ECU
check harness connector