ECU MITSUBISHI LANCER EVOLUTION 2007 Service Owners Manual

MPI -Troubleshooting13A-50
Code No. P1603 Battery backup line malfunctionProbable cause
Inspection Range
DIgnition switch: ON
Evaluation Conditions
DThe backup RAM information set at the last time when the ignition switch
was turned to the OFF position is not memorized.DBattery backup line disconnection, short circuit or
connector contact defect
DEngine-ECU malfunction
NG
Replace the engine-ECU
OK
Check the trouble symptoms.OKIntermittent Malfunction (Refer to
GROUP 00 - Points to Note for
Intermittent Malfunction.)
OK
Check the following connector:
C-115NG
Repair
OK
Check and repair the harness
between battery and engine-ECU.
DCheck for disconnection and
short-circuit of the power cable.
NGCheck the following connector:
C-129, C-05, C-135NG
Repair NO
MUT-II Self-Diag code
DDiagnosis codes No. P1603 is
output.End
NO
Measure at the C-115 engine-ECU
connector.
DDisconnect the connector to
measure at the harness side.
DVoltage between terminal No.80
and earth.
OK:System voltageYES
Turn the ignition switch to the
“LOCK”(OFF) position and then in 10
seconds turn the ignition switch to the
“ON” positionIs the battery terminal disconnected
before reading the diagnostic trouble
code?

MPI -Troubleshooting13A-51
Code No.P1610 Immobilizer system General Export-spec. models>Probable cause
Inspection Range
DIgnition switch: ON
Set Conditions
DImproper communication between the engine-ECU and the immobilizer-ECUDOpen or short circuit, or loose connector contact
DMalfunction of the immobilizer-ECU
DMalfunction of the engine-ECU
NOTE
(1) If the registered ignition keys are close each other when starting the engine, radio interference may
cause this code to be displayed.
(2) This code may be displayed when registering the key encrypted code.
NG
Replace the engine-ECU.
Check the trouble symptoms.
NG
Replace the immobilizer-ECU
OK
Check the trouble symptoms.
OK
Check the harness wire between the
immobilizer-ECU and the
engine-ECU, and repair if necessary.NG
Replace
Check the following connectors:
C-202, C-130, C-118NG
Repair

MPI -Troubleshooting13A-52
INSPECTION CHART FOR TROUBLE SYMPTOMS
Inspection
procedureCheck itemsReference page
1Communication between MUT-IIand entire system is not possible.13A-54
2Only communication between MUT-IIand engine-ECU is not possible.13A-55
3Engine warning lamp does not illuminate immediately after ignition switch is set to ON position.13A-56
4Engine warning lamp stays illuminated and does not turn OFF.13A-57
5Starting disabled (Starter does not rotate.)13A-58
6Starting disabled (Starter rotates but initial combustion does not occur.)13A-59
7Starting disabled (Initial combustion occurs but is incomplete.)13A-61
Improper starting (Starting time is long.)
8Unstable idling (Rough idling, hunting)13A-63
Inappropriate idling speed (High or low idling speed)
Engine stalls (Die out) during idling
9Engine stalls when starting travel. (Pass out)13A-66
10Engine stalls during deceleration13A-67
11Pulsation (Hesitation, sag)13A-68
Poor acceleration
Stumbling
Surging
12Shock during acceleration13A-70
13Shock during deceleration13A-71
14Knocking13A-72
15Deviation of ignition interval13A-73
16Run on (Dieseling)13A-74
17Abnormal odor, white smoke, black smoke, high CO or HC concentration when idling13A-75
18Battery dies13A-77
19Overheating13A-79
20Abnormal radiator fan motor rotation13A-80
21A/C ineffective13A-81
22Engine-ECU power supply, engine control relay, ignition switch-IG1 system13A-82
23Fuel pump system13A-85
24Radiator fan control relay system13A-87
25Condenser fan relay system13A-89
26A/C switch system13A-92
27A/C compressor relay system13A-93
28A/C load signal system13A-95
29Secondary air control solenoid valve system13A-96
30Intercooler water spray circuit system13A-97
31Intercooler water spray lamp system13A-99
32Ignition coil (integrated power transistor) system13A-100

MPI -Troubleshooting13A-55
Inspection Procedure 2
Only communication between MUT-IIand engine-ECU is
not possible.
Probable cause
Causes shown on right are suspected.DIgnition switch malfunction
DEngine control relay malfunction
DEngine-ECU malfunction
NG
Replace the engine-ECU.
OK
Check the trouble symptoms.OKIntermittent malfunction
(Refer to GROUP 00 - Points to Note
for Intermittent Malfunctions.)
OK
Check the harness between the
diagnosis connector and engine-ECU.
DCheck for disconnection,
short-circuit and damage of the
communication cable.
DCheck for disconnection,
short-circuit and damage of the
signal cable.NG
Repair
OK
Check the following connectors:
C-26, C-130, C-118, C-108, C-28
, C-102 drive vehicles>, C-145 MMCS>NG
Repair
Check the engine warning lamp.
DIgnition switch: ON
OK:Engine warning lamp is
illuminated.NGCheck the Inspection Procedure 22:
Engine-ECU power supply, engine
control relay, ignition switch-IG system.
NOTE
If the problem symptom does not disappear in the vehicle with MMCS after carrying out the above - mentioned
inspection procedure, there may be a malfunction in the multi - center display.

MPI -Troubleshooting13A-56
Inspection Procedure 3
Engine warning lamp does not illuminate immediately
after ignition switch is set to ON position.
Probable cause
The engine-ECU illuminates the engine warning lamp for 5 seconds immediately after
ignition switch is set to “ON” position to check whether the engine warning lamp bulb
is dead.DEngine warning lamp bulb dead
DIgnition switch malfunction
DEngine control relay malfunction
DEngine-ECU malfunction
NG
Replace the engine-ECU.
OK
Check the trouble symptoms.OKIntermittent malfunction
(Refer to GROUP 00 - Points to Note for Intermittent
Malfunctions.)
OK
Check the harness between the combination meter and engine-
ECU.
DCheck for damage of the output cable.NG
Repair
OK
Check the following connector:C-130NG
Repair
OK
Check the harness between the combination meter and ignition
switch.
DCheck for damage of the power cable.NG
Repair
OK
Check the following connectors:C-213, C-210, C-201NG
Repair
OK
Check and repair the harness between
the combination meter and engine-
ECU.
DCheck for disconnection and
short-circuit of the output cable.
OK
Measure at the C-122 engine-ECU
connector.
DDisconnect the connector to
measure at the harness side.
DIgnition switch: ON
DVoltage between terminal No. 36
and earth
OK:System voltageNGCheck the following connector:
C-130NG
Repair
OK
Check the following connector:
C-122NG
Repair
OK
Check and repair the harness between
the combination meter and ignition
switch.
DCheck for disconnection and
short-circuit of the power cable.
OK
Measure at the C-01 combination
meter connector.
DDisconnect the connector to
measure at the harness side.
DIgnition switch: ON
DVoltage between terminal No. 9 and
earth
OK:System voltageNGCheck the following connectors:
C-213, C-210, C-201NG
Repair
OK
Check the following connector:
C-01NG
Repair
YES
Check whether engine warning lamp bulb is dead.
(Refer to GROUP 54 - Combination Meter.)NGReplace the engine warning lamp.
Can engine be started?NOCheck the Inspection Procedure 22: Engine-ECU power supply,
engine control relay, ignition switch-IG system.
(Refer to P.13A-82.)

MPI -Troubleshooting13A-57
Inspection Procedure 4
Engine warning lamp stays illuminated and does not turn
OFF.
Probable cause
The engine-ECU illuminates the engine warning lamp when the occurrence of a
diagnosis code is recorded.DEngine-ECU malfunction
OK
Check and repair the harness between
the combination meter and engine-
ECU.
DCheck for short-circuit of the output
cable.
NG
Check the following connector:
C-130NG
Repair
NG
Replace the engine-ECU.
OK
Measure at the C-122 Engine-ECU
connector.
DDisconnect the connector to
measure at the harness side.
DIgnition switch: ON
DVoltage between terminal No. 36
and earth.
OK:System voltageOKCheck the trouble symptoms.OKIntermittent malfunction
(Refer to GROUP 00 - Points to Note
for Intermittent Malfunctions.)
NO
Check the following connector:
C-122NG
Repair
MUT-IISelf-Diag code
DIs a diagnosis code output?YESINSPECTION CHART FOR DIAGNO-
SIS CODE
(Refer to P.13A-12.)

MPI -Troubleshooting13A-58
Inspection Procedure 5
Starting disabled (Starter does not rotate.)
Probable cause
Causes shown on right are suspected.DBattery malfunction
DIgnition switch malfunction
DStarter malfunction
NG
Repair
OK
OK
NG
Repair
NG
OK
Check the harness between the igni-
tion switch and engine-ECU.
DCheck for disconnection,
short-circuit and damage of the
output cable.OK
Replace the ignition switch.
OK
Check the ignition switch.
(Refer to GROUP 54 - Ignition Switch.)
MUT-IIData list
DNo. 18: Cranking signal
DIgnition switch: ST
OK:ON
DIgnition switch: ON
OK:OFFNGNG
Repair
Check the battery.
(Refer to GROUP 54 - Battery.)NGReplace the battery.
Check the following connector:
C-201
OK
OK
Repair NG OK
Check the following connector:
B-19
OK
Check and repair the harness between
the ignition switch and starter.
DCheck for disconnection of the
output cable.
Measure at the B-19 starter connector.
DDisconnect the connector to
measure at the harness side.
DIgnition switch: ST
DVoltage between terminal No. 1 and
earth
OK:System voltageNG
Repair
Check the following connectors:
C-129, C-115
Check the following connector:
B-14
Check and repair the harness between
the ignition switch and starter.
DCheck for short-circuit of the output
cable.
NG
Repair
OK
Check the following connectors:
B-14, B-19
OK
NG
RepairCheck the following connector:
B-18NG
OK
Measure at the B-18 starter connector.
DDisconnect the connector to
measure at the harness side.
DIgnition switch: ST
DVoltage between terminal No. 1 and
earth
OK:System voltageNGCheck and repair the harness between
the battery and starter.
DCheck for disconnection and
short-circuit of the power cable.
NG
RepairOK
Replace the starter.
Check the harness between the bat-
tery and starter.
DCheck for damage of the power
cable.NG
RepairCheck the harness between the ignition
switch and starter.
DCheck for damage of the output
cable.OK

MPI -Troubleshooting13A-59
Inspection Procedure 6
Starting disabled (Starter rotates but initial combustion
does not occur.)
Probable cause
Causes shown on right are suspected.DBattery malfunction
DIgnition switch malfunction
DIgnition system malfunction
DFuel system malfunction
DThrottle valve malfunction
DTiming belt malfunction
DEngine-ECU malfunction-
OK
To the next page
OK
Check and repair the harness between
the ignition switch and ignition coil for
each cylinder.
DCheck for disconnection and
short-circuit of the power cable.
OK
Measure at the B-114 and B-119
ignition coil connectors.
DDisconnect the connector to
measure at the harness side.
DIgnition switch: ON
DVoltage between terminal No. 1 and
earth
OK:System voltageNGCheck the following connectors:
B-123, B-119NG
Repair
OK
Check the following connectors:
B-114, B-119NG
Repair
OK
MUT-IIData list
DNo. 22: Crank angle sensor (Refer to P.13A-103.)NGCheck the Code No. P0335: Crank angle sensor system.
(Refer to P.13A-35.)
OK
Check and repair the harness between the ignition switch inter-
mediate connector and engine-ECU.
DCheck for disconnection of the output cable.
YES
MUT-IIData list
DNo. 18: Cranking signal
DIgnition switch: ST
OK:ON
DIgnition switch: ON
OK:OFFNGCheck the following
connector:C-42NG
Repair
YES
Does the camshaft rotate during engine cranking?NOCheck the timing belt for defects.
NO
MUT-IIActuator test
DNo. 7: Fuel pump relay
OK:Fuel pump operation sound is heard.NOCheck the Inspection Procedure 23: Fuel pump system.
(Refer to P.13A-85.)
OK
MUT-IISelf-Diag code
DIs a diagnosis code output?YESINSPECTION CHART FOR DIAGNOSIS CODE
(Refer to P.13A-12.)
OK
Check the engine warning lamp.
DIgnition switch: ON
OK:Engine warning lamp is illuminated.NGCheck the Inspection Procedure 22: Engine-ECU power supply,
engine control relay, ignition switch-IG1 system.
(Refer to P.13A-82.)
Check the battery. (Refer to GROUP 54 - Battery.)NGReplace the battery.

MPI -Troubleshooting13A-60
NG
Check for the entry of foreign matter (water, kerosene, etc.) in fuel.
Check the trouble symptoms.OK
End
NG
Replace the engine-ECU.
OK
Check the trouble symptoms.OK
End
OK
Check the harness between the ignition switch and ignition coil for
each cylinder.
DCheck for damage of the power cable.NG
Repair
OK
Check the ignition coil parts.
(Refer to GROUP 16 - Ignition Device.)NGReplace the ignition coil.
OK
Check the spark plug. (Refer to GROUP 16 - Ignition Device.)NGReplace the spark plug.
OK
Check the spark plug cable.
(Refer to GROUP 16 - Ignition Device.)NGReplace the spark plug cable.
From the previous page

MPI -Troubleshooting13A-61
Inspection Procedure 7
Starting disabled (Initial combustion occurs but is
incomplete.), improper starting (Starting time is long.)
Probable cause
Causes shown on right are suspected.DBattery malfunction
DIgnition system malfunction
DFuel system malfunction
DIntake system malfunction
DEGR valve malfunction
DTiming belt malfunction
DImproper compression pressure
DEngine-ECU malfunction
OK
To the next page
OK
Check and repair the harness between
the engine-ECU and earth joint.
DCheck for disconnection and
damage of the earth cable.
(2) NGCheck the following connector:
C-126NG
Repair
NG
Replace the engine-ECU.
OK
Check the trouble symptoms.OKIntermittent malfunction
(Refer to GROUP 00 - Points to Note
for Intermittent Malfunctions.) NG
OK
Check the harness between the
engine-ECU and battery.
DCheck for disconnection,
short-circuit and damage of the
power cable.Repair
OK
Measure at the C-115 and C-126 en-
gine-ECU connectors.
DMeasure the engine-ECU terminal
voltage.
(1) Voltage between terminal No. 80
and earth
OK:System voltage
(2) Voltage between terminal No. 13
and earth
Voltage between terminal No. 26
and earth
(Ignition switch: ON)
OK:0.5 V or less(1) NGCheck the following connectors:
C-115, C-129, C-05, C-135NG
Repair
OK
Check the timing marks on the timing belt.NGAlign the timing marks on the timing belt.
OK
Check the air intake from the intake hose and intake manifold.NG
Repair
NO
MUT-IIData list
DNo. 13: Intake air temperature sensor
DNo. 21: Engine coolant temperature sensor
DNo. 25: Barometric pressure sensor
(Refer to P.13A-102.)

Proceed to OK if all service data values are correct.
Proceed to NG if there is even one abnormal service data value.NGRefer to inspections for diagnosis code of sensor showing abnormal
service data. (Refer to P.13A-12.)
OK
MUT-IISelf-Diag code
DIs a diagnosis code output?YESINSPECTION CHART FOR DIAGNOSIS CODE
(Refer to P.13A-12.)
NO
Check the battery. (Refer to GROUP 54 - Battery.)NGReplace the battery.
Has the battery terminal been disconnected recently?YESAfter warming up the engine, idle for approximately 10 minutes.