Mitsubishi Grandis. Manual — part 351

IGNITION SWITCH

CHASSIS ELECTRICAL

54A-23

Step 3. Connector check: Engine control relay
connector B-15X

Q: Is the check result normal?

YES :

Go to Step 4.

NO :

Repair the defective connector.

AC312585AB

Connector: B-15X

Relay box side

IGNITION SWITCH

CHASSIS ELECTRICAL

54A-24

Step 4. Check the wiring harness between engine
control relay connector B-15X (terminal 1) and
key reminder switch connector C-308 (terminal
5).

NOTE:

Prior to the wiring harness inspection, check joint
connector C-116, intermediate connector C-18, and
repair if necessary.

• Check the power supply line for open circuit.

Q: Are the wiring harness between engine control

relay connector B-15X (terminal 1) and key
reminder switch connector C-308 (terminal 5) in
good condition?

YES :

Go to Step 5.

NO :

Repair the wiring harness.

AC312585AB

Connector: B-15X

Relay box side

AC310153AE

Connector: C-308 <LHD>

Harness side

AC310183

AE

Connector: C-308 <RHD>

Harness side

AC310616

AG

Harness side

Connectors: C-18, C-116 <LHD>

C-116

C-116

C-18

C-18

AC310629AE

Harness side

Connectors: C-18, C-116 <RHD>

C-116

C-116

C-18

C-18

IGNITION SWITCH

CHASSIS ELECTRICAL

54A-25

Step 5. Resistance measurement at key reminder
switch connector C-308 to check the earth circuit
to the key reminder switch connector.

(1) Disconnect the key reminder switch connector

C-308 and measure the resistance at key
reminder switch connector C-308 harness side.

(2) Measure the resistance between terminal 3 and

earth.

OK: 2 ohms or less

Q: Is the check result normal?

YES :

The procedure is complete.

NO :

Go to Step 6.

Step 6. Check the wiring harness between key
reminder switch connector C-308 (terminal 3) and
earth.

NOTE:

Prior to the wiring harness inspection, check joint
connector C-01 <RH drive vehicles>, and repair if
necessary.

• Check the earth wires for open circuit.

Q: Are the wiring harness between key reminder

switch connector C-308 (terminal 3) and earth in
good condition?

YES :

The procedure is complete.

NO :

Repair the wiring harness.

DATA LIST REFERENCE TABLE

M1543007300411

AC310153AE

Connector: C-308 <LHD>

Harness side

AC310183

AE

Connector: C-308 <RHD>

Harness side

AC310506

Connector C-308
(Harness side)

CC

AC310153AE

Connector: C-308 <LHD>

Harness side

AC310183

AE

Connector: C-308 <RHD>

Harness side

AC310631AE

Connector: C-01 <RHD>

Item No.

Inspection item

Inspection
requirement

Normal condition

01

Key has been registered

−

Number of registered ignition keys

IGNITION SWITCH

CHASSIS ELECTRICAL

54A-26

CHECK IMMOBILIZER-ECU

M1543007600605

TERMINAL VOLTAGE CHECK TABLE

ON-VEHICLE SERVICE

HOW TO REGISTER ENCRYPTED CODE

M1543008100562

CAUTION

Because registering the encrypted codes is done
after all previously-registered codes have been
erased, you should keep all of the ignition keys
that have already been registered accessible.
If the ignition key, immobilizer-ECU, engine-ECU
<M/T> or engine-A/T-ECU <A/T> is replaced or an
ignition key is added, encrypted codes of all the
ignition keys must be registered. (A maximum of
eight different ignition key can be registered).
Moreover, when the immobilizer-ECU has been
replaced, you will need to use MUT-III to register the
immobilizer-ECU and input the vehicle secret code
and to register the password (secret code) that the
owner specifies into the immobilizer-ECU. If an
attempt is made to start the engine with an
unregistered ignition key, cranking occurs, but fuel
supply is cut off to disable the engine. In
approximately.
NOTE: Engine-ECU <M/T> or engine-A/T-ECU
<A/T> has an encrypted code for immobilizer-ECU,
and the encrypted code is registered in the
immobilizer-ECU and ignition key.

POINTS TO NOTE DURING OPERATION

If none of the functions can be used, check the
diagnosis codes, and after carrying out any
necessary repairs, repeat the operation. If an
incorrect password is input ten times in a row, the
immobilizer-ECU judges that an unauthorized

operation is being attempted. Start-prevention mode
will be set, and engine operation will stop and all
special functions will be disabled. If the ignition
switch is turned to "ON" position, "Unauthorized
operation, start- prevention mode" will be cancelled.

KEY ID (ENCRYPTED CODE)
REGISTRATION <MUT-III>

All ignition keys can be registered with MUT-III.
Additional ignition keys can be registered with
MUT-III.

REGISTRATION WITH THE MUT-III

CAUTION

To prevent damage to MUT-III, always turn the
ignition switch to "LOCK" (OFF) position before
connecting or disconnecting MUT-III.
NOTE:

.

•

Before registration, check that no diagnosis code
is set. If a diagnosis code is set, resolve the
problem beforehand.

•

Using the key ID register function will cause all
key IDs that have been previously registered in
the immobilizer-ECU to be erased. All keys need
to be registered. Those which have been
registered before should be on hand before using
this function.

•

If registering more than one key, do not
disconnect MUT-III halfway through the
registration process.

•

After registering key IDs, check that the engine
can be started using all of the keys that have
been registered. If the engine will not start, refer
to Immobilizer System Troubleshooting

P.54A-9

.

AC311921

Terminal No.

Signal

Inspection condition

Terminal voltage

3

Immobilizer-ECU earth

Always

0V

5

Immobilizer-ECU power supply

Ignition switch: "LOCK"
(OFF)

0V

Ignition switch: "ON"

System voltage

7

Engine-ECU <M/T> or engine-A/T-ECU -

-