Mitsubishi Outlander (2013+). Manual - part 636

IMMOBILIZER SYSTEM <Vehicles without keyless operation system>

CHASSIS ELECTRICAL

54A-29

antenna connector (ANTP, ANTG line) and the 
body earth.

OK: Continuity exists (2 

Ω or less)

Q: Is the check result normal?

YES : 

Go to Step 4

NO : 

Go to Step 3

STEP 3. Check of short to power supply, short to 
earth, and open circuit in ANTP, ANTG line 
between receiver antenna connector and key 
reminder switch connector .

Q: Is the check result normal?

YES : 

Go to Step 4

NO : 

Repair the connector(s) or wiring harness.

STEP 4. Check whether the diagnosis code is 
reset.
(1) Erase the diagnosis code.
(2) Turn the ignition switch from the LOCK (OFF) 

position to the ON position.

(3) Check if the diagnosis code is set.

Q: Is the diagnosis code set?

YES : 

Replace receiver antenna and turn the 

ignition switch to the ON and OFF. Then go 
to Step 5.

NO : 

The diagnosis is complete.

STEP 5. Check whether the diagnosis code is 
reset.
Recheck if the diagnosis code is set.
(1) Turn the ignition switch from the LOCK (OFF) 

position to the ON position.

(2) Check if the diagnosis code is set.

Q: Is the diagnosis code set?

YES : 

Replace ETACS-ECU and register the ID 

codes (Refer to 

P.54A-33

).

NO : 

The diagnosis is complete.

DATA LIST REFERENCE TABLE

M1541104000122

Item No.

Check item

Check 
condition

Normal condition

1

Number of registered 
IMMOB.key

−

Number of stored ignition keys (Number 
of registered ignition keys that can start 
the engine)

2

Memorized keyless keys

−

Number of stored transmitters (Number 
of registered ignition keys that can 
perform keyless entry function)

3

Received key data(ID)

−

Key ID for stored ignition key

4

Received key data(button)

−

Switch display of transmitter

TROUBLE SYMPTOM CHART

M1541100300239

CAUTION

During diagnosis, a diagnosis code associated with other system may be set when the ignition switch 
is turned on with connector(s) disconnected. On completion, confirm all systems for diagnosis 
code(s). If diagnosis code(s) are set, erase them all.

Trouble symptom

Inspection 
procedure No.

Reference 
page

M.U.T.-III cannot communicate with ETACS-ECU.

1

P.54A-30

The ignition key cannot be registered using M.U.T.-III.

2

P.54A-30

Engine does not start.

3

P.54A-31

Check the power supply and earth circuit to the receiver antenna.

4

P.54A-32

IMMOBILIZER SYSTEM <Vehicles without keyless operation system>

CHASSIS ELECTRICAL

54A-30

SYMPTOM PROCEDURES

Inspection Procedure 1: M.U.T.-III cannot communicate with ETACS-ECU.

CAUTION

Before replacing the ECU, ensure that the com-
munication circuit is normal.

COMMENTS ON TROUBLE SYMPTOM

ETACS-ECU is communicating with M.U.T.-III via 
CAN. Therefore, communication error of 
ETACS-ECU is suspected.

PROBABLE CAUSES

• Malfunction of the power supply and the earth of 

ETACS-ECU

• Malfunction of CAN bus line

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III CAN bus diagnostics
Use M.U.T.-III to diagnose the CAN bus lines.

Q: Is the check result normal?

YES : 

Go to Step 2.

NO : 

Repair the CAN bus line (Refer to GROUP 
54C 

− Troubleshooting ). On completion, go 

to Step 3.

STEP 2. Check the power supply circuit and the 
earth circuit to ETACS-ECU.
Refer to Inspection Procedure "ETACS-ECU power 
supply circuit" 

P.54A-311

.

Q: Is the check result normal?

YES : 

Go to Step 3.

NO : 

Repair the power supply circuit and the 
earth circuit to ETACS-ECU.

STEP 3. Retest the system
Check if M.U.T.-III can communicate with 
ETACS-ECU.

Q: Is the check result normal?

YES : 

Intermittent malfunction (Refer to GROUP 

00 

− How to Use 

Troubleshooting/Inspection Service Points 

− 

How to Cope with Intermittent Malfunction ).

NO : 

Replace ETACS-ECU and register the ID 
codes (Refer to 

P.54A-33

).

Inspection Procedure 2: The ignition key cannot be registered using M.U.T.-III.

COMMENTS ON TROUBLE SYMPTOM

If only some ignition keys cannot be registered, the 
ignition key itself may be faulty. If no ignition key can 
be registered, the key assembly may have already 
been registered for another vehicle, or the receiver 
antenna or ETACS-ECU may be faulty.

PROBABLE CAUSES

• Malfunction of the ignition key

• Damaged wiring harness and connectors

• Malfunction of receiver antenna

• Malfunction of ETACS-ECU

• Ignition key registered for other vehicle

DIAGNOSIS PROCEDURE

STEP 1. Check the ignition key inserted in the 
key cylinder for interference.

Q: Are there other ignition keys or anything that 

interferes with the communication (things that 
generate radio waves such as magnets and an 
air-cleaning device that has a power plug) near the 
ignition key inserted in the key cylinder?
YES : 

Move away or remove other ignition keys or 

things that interfere with the communication 
(things that generate radio waves such as 
magnets and a air-cleaning device that has 
a power plug) near the ignition key. Then, 
go to step 2.

NO : 

Go to Step 3.

STEP 2. Retest the system
Check that the ignition key can be registered.

Q: Is the check result normal?

YES : 

The diagnosis is complete.

NO : 

Go to Step 3.

IMMOBILIZER SYSTEM <Vehicles without keyless operation system>

CHASSIS ELECTRICAL

54A-31

STEP 3. Check which ignition key cannot be 
registered.

Q: Can any one of the ignition keys be registered?

Only some keys : 

Replace the key that cannot be 

registered and register the ID codes (Refer 
to 

P.54A-33

). After registering the ID codes, 

go to Step 5.

All keys : 

Go to Step 4.

STEP 4. Retest the system
Check the M.U.T.-III screen when the key was not 
able to be registered.

Q: Which error message did the M.U.T.-III display?

Abnormality in key : 

Carry out diagnosis code No. 

B1A25: Key ID unmatched and diagnosis 
code No. B1A35: Transponder read error 
(Refer to 

P.54A-25

 <B1A25>, 

P.54A-27

 

<B1A35>). Then, go to Step 5. 

ECU internal error : 

Replace ETACS-ECU and 

register the ID codes (Refer to 

P.54A-33

). 

After registering the ID codes, go to Step 5.

STEP 5. Retest the system
Check that the ignition key can be registered.

Q: Is the check result normal?

YES : 

The diagnosis is complete.

NO : 

Replace ETACS-ECU and register the ID 
codes (Refer to 

P.54A-33

).

Inspection Procedure 3: Engine does not start.

COMMENTS ON TROUBLE SYMPTOM

If the fuel injection does not work, ETACS-ECU, 
receiver antenna and the MPI system may have a 
problem. This symptom is not considered abnormal 
when the engine is started by an ignition key that has 
not been registered.

PROBABLE CAUSES

• Malfunction of the MPI system

• Malfunction of receiver antenna

• Malfunction of ETACS-ECU

• Malfunction of CAN bus line

• Malfunction of the transponder

• Chassis No. not programmed

DIAGNOSIS PROCEDURE

STEP 1. Battery voltage check
Measure the battery voltage when cranking.

OK: 8 V or more

Q: Is the check result normal?

YES : 

Go to Step 2.

NO : 

Check the battery (Refer to 

P.54A-10

).

STEP 2. M.U.T.-III CAN bus diagnostics
Use M.U.T.-III to diagnose the CAN bus lines.

Q: Is the check result normal?

YES : 

Go to Step 3.

NO : 

Repair the CAN bus line (Refer to GROUP 
54C 

− Troubleshooting ). 

STEP 3. M.U.T.-III other system diagnosis code
Check whether the MPI system-related diagnosis 
code is set.

Q: Is the diagnosis code set?

YES : 

Refer to GROUP 13A 

− Troubleshooting .

NO : 

Go to Step 4.

STEP 4. M.U.T.-III diagnosis code
Check whether the Immobilizer system-related diag-
nosis code is set.

Q: Is the diagnosis code set?

YES : 

Refer to Diagnosis code chart 

P.54A-23

.

NO : 

Go to Step 5.

STEP 5. Check that the engine starts

Q: Does the engine start?

YES : 

The diagnosis is complete.

NO : 

Refer to GROUP 13A 

− Troubleshooting . 

Then go to Step 6.

STEP 6. Check that the engine starts
Replace the receiver antenna.

Q: Does the engine start?

YES : 

The diagnosis is complete.

NO : 

Replace ETACS-ECU and register the ID 
codes (Refer to 

P.54A-33

).

IMMOBILIZER SYSTEM <Vehicles without keyless operation system>

CHASSIS ELECTRICAL

54A-32

Inspection Procedure 4: Check the power supply and earth circuit to the receiver antenna.

COMMENTS ON TROUBLE SYMPTOM

If receiver antenna does not work at all (keyless 
entry or immobilizer cannot operate), the power sup-
ply or earth circuit system of receiver antenna may 
be faulty.

PROBABLE CAUSES

• Damaged wiring harness and connectors

• Malfunction of receiver antenna

DIAGNOSIS PROCEDURE

STEP 1. Voltage measurement at the receiver 
antenna connector (5V line).
(1) Disconnect the connector and measure the 

resistance at the wiring harness side.

(2) Measure the voltage between the receiver 

antenna connector (5V line) and the body earth.

OK: System voltage

Q: Is the check result normal?

YES : 

Go to Step 3.

NO : 

Go to Step 2.

STEP 2. Check of open circuit in 5V line between 
receiver antenna connector and ETACS-ECU 
connector.

Q: Is the check result normal?

YES : 

Go to Step 3.

NO : 

Repair the connector(s) wiring harness.

STEP 3. Resistance measurement at the receiver 
antenna connector (GND line).
(1) Disconnect the connector and measure the 

resistance at the wiring harness side.

(2) Measure the resistance between the receiver 

antenna connector (GND line) and the body 
earth.

OK: Continuity exists (2 

Ω or less)

Q: Is the check result normal?

YES : 

The diagnosis is complete.

NO : 

Go to Step 4.

STEP 4. Check of short to earth, and open circuit 
in GND line between receiver antenna connector 
and ETACS-ECU connector.

Q: Is the check result normal?

YES : 

 The diagnosis is complete.

NO : 

Repair the connector(s) and wiring harness.

CHECK AT ECU TERMINAL

M1541104100215

RECEIVER ANTENNA TERMINAL CHECK

ACC00129

Terminal 
number

Terminal 
code

Check item

Check condition

Normal condition

1

−

−

−

−

2

ANTG

Immobilizer antenna output (-)

When immobilizer 

authentication

*

5 Vp-p

3

−

−

−

−

4

5V

Power supply (5V)

Always

5 V

5

SIGR

Keyless entry system signal 
output

Always

0 to 5 V (pulse 
signal)

6

PWRC

Receiver antenna (door entry) 
power control

Ignition switch is OFF

0 to 5 V (pulse 
signal)

7

GND

Earth

Always

1 V or less

8 to 13

−

−

−

−