Mitsubishi Grandis. Manual - part 347

IGNITION SWITCH

CHASSIS ELECTRICAL

54A-7

IGNITION SWITCH

SPECIAL TOOLS

M1543000602031

IGNITION SWITCH

CHASSIS ELECTRICAL

54A-8

Tool

Number

Name

Application

MB990784

Ornament remover

Steering column cover 
removal

MB991955
A: MB991824
B: MB991827
C: MB991910
D: MB991911
E: MB991825
F: MB991826

MUT-III 
sub-assembly

A: (V. C.I.) Vehicle 

communication 
interface

B: MUT-III USB 

cable

C: MUT-III Main 

harness A 
(Vehicles with 
CAN 
communication 
system)

D: MUT-III Main 

harness B 
(Vehicles without 
CAN 
communication 
system)

E: MUT-III 

Measurement 
adapter

F: MUT-III Trigger 

harness

Diagnosis code check

CAUTION

For vehicles with CAN 
communication, use MUT-III 
main harness A to send 
simulated vehicle speed. If 
you connect MUT-III main 
harness B instead, the CAN 
communication does not 
function correctly.

MB990784

MB991910

MB991826

MB991955

MB991911

MB991824

MB991827

MB991825

A

B

C

D

E

F

DO NOT USED

IGNITION SWITCH

CHASSIS ELECTRICAL

54A-9

TROUBLESHOOTING

IGNITION SWITCH

M1543000701198

The ignition switch is controlled by the Smart Wiring 
System (SWS). For troubleshooting, refer to 
respective Groups below.

• Not using SWS monitor: GROUP 54B, 

Troubleshooting 

P.54B-74

.

• Using SWS monitor: GROUP 54C, 

Troubleshooting 

P.54C-44

.

IMMOBILIZER
STANDARD FLOW OF DIAGNOSIS 
TROUBLESHOOTING

Refer to GROUP 00, How to Use 
Troubleshooting/Inspection Service Points 

P.00-5

.

DIAGNOSTIC FUNCTION

M1543007000647

HOW TO READ DIAGNOSIS CODE

Refer to GROUP 00, How to Use 
Troubleshooting/Inspection Service Points 

P.00-5

.

HOW TO ERASE DIAGNOSIS CODE

Refer to GROUP 00, How to Use 
Troubleshooting/Inspection Service Points 

P.00-5

. 

ENCRYPTED CODE REGISTRATION CRITERIA TABLE

M1543026000033

The ignition key contains a transponder (small 
transmitter), which retains an unique encrypted code. 
Under any of the conditions below, the encrypted 
code should be registered in the immobilizer-ECU 
again. The immobilizer-ECU can retain maximum 
eight different encrypted codes. This means that 
maximum eight ignition keys can be registered.

MB991223

A: MB991219
B: MB991220
C: MB991221
D: MB991222

Harness set

A: Test harness
B: LED harness
C: LED harness 

adapter

D: Probe

Making voltage and 
resistance measurements 
during troubleshooting

A: Connect pin contact 

pressure inspection

B: Power circuit inspection
C: Power circuit inspection
D: Commercial tester 

connection

Tool

Number

Name

Application

MB991223

A

B

C

D

AC

Component to be replaced

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

Immobilizer-ECU

Ignition key

When engine-ECU <M/T> or 
engine-A/T-ECU <A/T> is 
replaced

−

Should not be 
replaced

Should not be replaced
Should be registered 
again

IGNITION SWITCH

CHASSIS ELECTRICAL

54A-10

NOTE: 

*

: When the engine-ECU <M/T> or 

engine-A/T-ECU <A/T> other than immobilizer 
system is rewritten, it is not necessary to register the 
ignition key again.

CHART CLASSIFIED BY DIAGNOSIS 
CODES

M1543007100581

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.

When Engine-ECU <M/T> or 
Engine-A/T-ECU <A/T> is 
overwritten

*

−

Should not be 
replaced

Should not be replaced
Should be registered 
again

When immobilizer-ECU is 
replace

Should not be 
replaced

−

Should not be replaced
All ignition keys should be 
registered again

When ignition key is added

Should not be 
replaced

Should not be 
replaced

• Additional ignition key 

should be registered

• All ignition keys should 

be registered again

When ignition key is lost

Should not be 
replaced

Should not be 
replaced

All the ignition keys other 
than the lost one should 
be registered again

Component to be replaced

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

Immobilizer-ECU

Ignition key

Code No.

Diagnosis contents

Reference page

11

Transponder communication system or radio interference 
of encrypted code.

P.54A-11

12

Encrypted codes are not the same or are not registered.

P.54A-11