Mitsubishi Outlander (2013+). Manual - part 555

NO :

Go to Step 8.

STEP 8. Check of short to power supply, short to
earth, and open circuit in +B1 line between
fusible link and OSS-ECU connector

NOTE: Before the wiring harness check, check the
ETACS-ECU connector and joint connector, and
repair if necessary.

Q: Is the check result normal?

YES :

Intermittent malfunction is suspected (Refer

to GROUP 00

− How to Use

Troubleshooting/Inspection Service Points

−

How to Cope with Intermittent Malfunction ).

NO :

Repair the connector(s) or wiring harness.

Inspection Procedure 2: Vehicle power does not turn ON. (not possible with both of power supply
mode ACC and ON)

CAUTION

Before replacing the ECU, ensure that the power
supply circuit, the earth circuit and the communi-
cation circuit are normal.

COMMENTS ON TROUBLE SYMPTOM

When the vehicle power does not turn ON (not possi-
ble with both of power supply mode ACC and ON),
the battery, CAN bus line, OSS-ECU, OSS-ECU
power supply, or earth circuit may have a problem.

NOTE: OSS-ECU can communicate with the
M.U.T.-III even when the engine switch is in the
"OFF" position.

PROBABLE CAUSES

• Malfunction of battery

• Damaged wiring harness and connectors

• Malfunction of engine switch (poor connector

contact, poor engine switch contact)

• Malfunction of the CAN bus line

• Malfunction of OSS-ECU

• ETACS-ECU malfunction

DIAGNOSIS PROCEDURE

STEP 1. Battery check
Perform the battery test to check the battery status.
(Refer to GROUP 54A

− Battery .)

Q: Is the check result normal?

YES :

Go to Step 2.

NO :

Replace the battery.

STEP 2. Check that the M.U.T.-III communicates
with this system.
Check that the communication with M.U.T.-III is pos-
sible.

NOTE: If ETACS-ECU is not active, OSS-ECU can-
not communicate with the M.U.T.-III.
(1) Perform the ON/OFF operation of any of the door

switches for several times, or open any of the
doors.

(2) Check that OSS-ECU can communicate with the

M.U.T.-III.

Q: Is the check result normal?

YES :

Go to Step 3.

NO :

Carry out the troubleshooting of "OSS-ECU

power supply or earth circuit
malfunction".(Refer to

P.42B-80

TROUBLESHOOTING <OSS-ECU>

KEYLESS OPERATION SYSTEM (KOS)

42B-82

STEP 3. M.U.T.-III CAN bus diagnostics
Use the M.U.T.-III to diagnose the CAN bus lines.

Q: Is the check result normal?

YES :

Go to Step 4.

NO :

Repair the CAN bus line (Refer to GROUP
54C

− Troubleshooting ).

STEP 4. M.U.T.-III diagnosis code
Check if the diagnosis code is set to OSS-ECU.

Q: Is the diagnosis code set?

YES :

Diagnose the OSS. Refer to

NO :

Go to Step 5.

STEP 5. Engine switch check
Continuity check of engine switch (Refer to

P.42B-101

Q: Is the check result normal?

YES :

Go to Step 6.

NO :

Replace the engine switch.

STEP 6. Check of the troubles
Check that the vehicle power can be turned ON.

Q: Is the check result normal?

YES :

Intermittent malfunction is suspected (Refer

to GROUP 00

− How to Use

Troubleshooting/Inspection Service Points

−

How to Cope with Intermittent Malfunction ).

NO :

Carry out the troubleshooting relevant to the
input signal of ETACS-ECU. (Refer to
GROUP 54A

− ETACS .) Then, go to Step 7.

STEP 7. Check of the troubles
Check that the vehicle power can be turned ON.

Q: Is the check result normal?

YES :

This diagnosis is complete.

NO :

Replace the OSS-ECU and register the
chassis number (Refer to

Inspection Procedure 3: Vehicle power does not turn ON. (Not possible with power supply mode ACC
only)

CAUTION

Before replacing the ECU, ensure that the power
supply circuit, the earth circuit and the communi-
cation circuit are normal.

COMMENTS ON TROUBLE SYMPTOM

When the vehicle power does not turn ON (not possi-
ble with power supply mode ACC only), the possible
cause may be that the OSS-ECU cannot output the
ACC signal, or that the ACC internal relay of
ETACS-ECU does not turn ON. Therefore,
OSS-ECU or ETACS-ECU may have a problem.

PROBABLE CAUSES

• Malfunction of OSS-ECU

• Malfunction of ETACS-ECU

• Damaged harness wires and connectors

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III diagnosis code
Check if the diagnosis code is set to OSS-ECU.

Q: Is the diagnosis code set?

YES :

Diagnose the OSS. Refer to

NO :

Go to Step 2.

STEP 2. Voltage measurement at ETACS-ECU
connector (ACC terminal)
(1) With the ETACS-ECU connector kept connected,

measure by backprobing.

(2) Using the M.U.T.-III, set the forced power supply

output to "IG-ACC".(Refer to

(3) Measure the voltage between the ETACS-ECU

connector (ACC terminal) and body earth.

OK: System voltage

Q: Is the check result normal?

YES :

Go to Step 3.

NO :

Replace the OSS-ECU and register the
chassis number (Refer to

STEP 3. Check of the troubles
Check that the vehicle power (power supply mode
ACC) can be turned ON.

Q: Is the check result normal?

YES :

Intermittent malfunction is suspected (Refer

to GROUP 00

− How to Use

Troubleshooting/Inspection Service Points

−

How to Cope with Intermittent Malfunction ).

NO :

Carry out the troubleshooting relevant to the
input signal of ETACS-ECU. (Refer to
GROUP 54A

− ETACS .)

TROUBLESHOOTING <OSS-ECU>

KEYLESS OPERATION SYSTEM (KOS)

42B-83

Inspection Procedure 4: Vehicle power does not turn ON. (Not possible with power supply mode ON
only)

CAUTION

Before replacing the ECU, ensure that the power
supply circuit, the earth circuit and the communi-
cation circuit are normal.

COMMENTS ON TROUBLE SYMPTOM

If the vehicle power does not turn ON (not possible
with power supply mode ON only), the possible
cause may be that the OSS-ECU cannot output the
IG1 signal, or that the IG1 internal relay of
ETACS-ECU does not turn ON. Therefore,
OSS-ECU or ETACS-ECU may have a problem.

PROBABLE CAUSES

• Malfunction of OSS-ECU

• Malfunction of ETACS-ECU

• Damaged harness wires and connectors

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III diagnosis code
Check if the diagnosis code is set to OSS-ECU.

Q: Is the diagnosis code set?

YES :

Diagnose the OSS. Refer to

NO :

Go to Step 2.

STEP 2. Voltage measurement at ETACS-ECU
connector (IG1 terminal)
(1) With the ETACS-ECU connector kept connected,

measure by backprobing.

(2) Using the M.U.T.-III, set the forced power supply

output to "IG-ON".(Refer to

(3) Measure the voltage between the ETACS-ECU

connector (IG1 terminal) and body earth.

OK: System voltage

Q: Is the check result normal?

YES :

Go to Step 3.

NO :

Replace the OSS-ECU and register the
chassis number (Refer to

STEP 3. Check of the troubles
Check that the vehicle power (power supply mode
ON) can be turned ON.

Q: Is the check result normal?

YES :

Intermittent malfunction is suspected (Refer

to GROUP 00

− How to Use

Troubleshooting/Inspection Service Points

−

How to Cope with Intermittent Malfunction ).

NO :

Carry out the troubleshooting relevant to the
input signal of ETACS-ECU. (Refer to
GROUP 54A

− ETACS .)

Inspection Procedure 5: Engine does not start (cranking is not performed).

CAUTION

Before replacing the ECU, ensure that the power
supply circuit, the earth circuit and the communi-
cation circuit are normal.

COMMENTS ON TROUBLE SYMPTOM

When the engine does not start (cranking is not per-
formed), the battery malfunction, stop lamp switch
malfunction, engine starting circuit malfunction, or
OSS-ECU malfunction may be present.

PROBABLE CAUSES

• Malfunction of battery

• Damaged wiring harness or connector (open cir-

cuit in STOE line)

• Error in engine starting circuit system

• Stop lamp switch malfunction

• Malfunction of the CAN bus line

• Malfunction of OSS-ECU

• Malfunction of AS&G-ECU

• Engine-ECU malfunction

• ETACS-ECU malfunction

PROBABLE CAUSES

STEP 1. Battery check
Perform the battery test to check the battery status.
(Refer to GROUP 54A

− Battery .)

Q: Is the check result normal?

YES :

Go to Step 2

NO :

Replace the battery.

STEP 2. M.U.T.-III diagnosis code
Check if the diagnosis code is set to OSS-ECU.

Q: Is the diagnosis code set?

YES :

Diagnose the OSS-ECU. Refer to

NO :

Go to Step 3

TROUBLESHOOTING <OSS-ECU>

KEYLESS OPERATION SYSTEM (KOS)

42B-84

STEP 3. M.U.T.-III data list
Check the OSS-ECU data list.

•

Operation
state

Item No.

Check item

Displ
ay

Brake
pedal is
depressed

Stop lamp switch

Brake
pedal
released

OFF

Operate the brake pedal.

OK: Operation state and data list display
agree with each other.

Q: Is the check result normal?

YES :

Go to Step 5

NO :

Go to Step 4

STEP 4. Stop Lamp Switch Check
Continuity check of stop lamp switch (Refer to
GROUP 35A

− Brake Pedal ).

Q: Is the check result normal?

YES :

Intermittent malfunction is suspected (Refer

to GROUP 00

− How to Use

Troubleshooting/Inspection Service Points

−

How to Cope with Intermittent Malfunction ).

NO :

Replace the stop lamp switch.

STEP 5. Voltage measurement at ETACS-ECU
connector (STOE terminal)
(1) With the ETACS-ECU connector kept connected,

measure by backprobing.

(2) Using the M.U.T.-III, set the forced power supply

output to other than "IG-ST".(Refer to

(3) Measure the voltage between the ETACS-ECU

connector (STOE terminal) and body earth.

OK: 1 V or less

(4) Using the M.U.T.-III, set the forced power supply

output to "IG-ST".(Refer to

(5) Measure the voltage between the ETACS-ECU

connector (STOE terminal) and body earth.

OK: System voltage

Q: Is the check result normal?

YES :

Go to Step 6

NO :

Replace the OSS-ECU and register the
chassis number (Refer to

STEP 6. M.U.T.-III other system data list
Check the engine-ECU data list.
(1) Using the M.U.T.-III, set the forced power supply

output to "IG-ST".(Refer to

(2) Check the engine-ECU data list.

Item No.

Check item

Display

Cranking signal
(Ignition switch-ST)

OK: Operation state and data list display
agree with each other.

(3) Using the M.U.T.-III, set the forced power supply

output to other than "IG-ST".(Refer to