Mitsubishi 380. Manual - part 869

IGNITION SWITCH

CHASSIS ELECTRICAL

54A-10

DOOR LOCK PREVENTION FUNCTION 
DIAGNOSIS

M1543000701046

The door lock prevention function is controlled by the 
Simplified Wiring System (SWS). For troubleshoot-
ing, refer to GROUP 54B, SWS Diagnosis 

P.54B-57

.

IMMOBILIZER SYSTEM DIAGNOSIS

INTRODUCTION TO IMMOBILIZER SYSTEM 
DIAGNOSIS

M1543009901326

CAUTION

The encrypted code should always be re-regis-
tered when replacing the ETACS-ECU.
The IMMOBILIZER system consists of the 
ETACS-ECU, Engine-ECU, ignition key and ignition 
key ring antenna. If the engine cannot be started by 
using a registered ignition key, one of these compo-
nents may be defective. If the IMMOBILIZER system 
has immobilised the engine, MPI system DTC P0513 
will be output. In this case, observe the 
IMMOBILIZER system troubleshooting.

IMMOBILIZER SYSTEM DIAGNOSTIC TROUBLESHOOTING STRATEGY

M1543006900841

Use the following steps to plan your diagnostic strat-
egy.
1. Gather information about the problem from the 

customer.

2. Verify that the condition as described by the 

customer exists.

3. Check the vehicle for any IMMOBILIZER system 

DTCs.

4. If you cannot verify the condition and there are no 

IMMOBILIZER system DTCs, the malfunction is 
intermittent. Refer to GROUP 00, How to Use 
Troubleshooting/inspection Service Points 

− How 

to Cope with Intermittent Malfunctions 

P.00-14

.

5. If you can verify the condition but there are no 

IMMOBILIZER system DTCs, or the system 
cannot communicate with diagnostic tool 
MB991958, refer to Symptom Chart and find the 
fault 

P.54A-18

.

6. If there is an IMMOBILIZER system DTC, record 

the DTC, then erase it from the memory using 
diagnostic tool MB991958.

7. Recreate the IMMOBILIZER system DTC set 

conditions to see if the same IMMOBILIZER 
system DTC will resets.
(1) If the same IMMOBILIZER system DTC 

resets, perform the appropriate diagnostic 
procedure. Refer to Diagnostic Trouble Code 
Chart 

P.54A-13

.

(2) If the same IMMOBILIZER system DTC does 

not reset, the malfunction is intermittent. Refer 
to GROUP 00, How to Use 
Troubleshooting/inspection Service Points 

− 

How to Cope with Intermittent Malfunctions 

P.00-14

.

IGNITION SWITCH

CHASSIS ELECTRICAL

54A-11

DIAGNOSIS FUNCTION

M1543007000443

HOW TO CONNECT DIAGNOSTIC TOOL (MUT-III)

Required Special Tools:

• MB991958: Diagnostic Tool (MUT-III Sub Assembly)

• MB991824: Vehicle Communication Interface (V.C.I.)

• MB991827: MUT-III USB Cable

• MB991910: MUT-III Main Harness A (Vehicles with CAN 

communication system)

CAUTION

To prevent damage to diagnostic tool MB991958, always 
turn the ignition switch to the "LOCK" (OFF) position 
before connecting or disconnecting diagnostic tool 
MB991958.
1. Ensure that the ignition switch is at the "LOCK" (OFF) 

position.

2. Start up the personal computer.

3. Connect special tool MB991827 to special tool MB991824 

and the personal computer.

4. Connect special tool MB991910 to special tool MB991824.

5. Connect special tool MB991910 to the data link connector.

6. Turn the power switch of special tool MB991824 to the "ON" 

position.

NOTE: When special tool MB991824 is energized, special 
tool MB991824 indicator lamp will be illuminated in a green 
color.

7. Start the MUT-III system on the personal computer.

NOTE: Disconnecting the diagnostic tool MB991958 is the 
reverse of the connecting sequence, making sure that the 
ignition switch is at the "LOCK" (OFF) position.

HOW TO READ AND ERASE DIAGNOSTIC 
TROUBLE CODES

Required Special Tools:

• MB991958: Diagnostic Tool (MUT-III Sub Assembly)

• MB991824: Vehicle Communication Interface (V.C.I.)

• MB991827: MUT-III USB Cable

• MB991910: MUT-III Main Harness A (Vehicles with CAN 

communication system)

CAUTION

To prevent damage to diagnostic tool MB991958, always 
turn the ignition switch to the "LOCK" (OFF) position 
before connecting or disconnecting diagnostic tool 
MB991958.

NOTE: If the battery voltage is low, diagnostic trouble codes will 
not be set. Check the battery if diagnostic tool MB991958 does 
not display.

00DB076A

MB991910

DATA LINK

CONNECTOR

MB991824

MB991827

IGNITION SWITCH

CHASSIS ELECTRICAL

54A-12

1. Connect diagnostic tool MB991958 to the data link 

connector.

2. Turn the ignition switch to "ON" position.

3. Select "Interactive Diagnosis" from the start-up screen.

4. Select "System select."

5. Choose "IMMOBILIZER" .

6. Select "Self-diagnosis."

7. If a DTC is set, it is shown.

8. Choose "Erase DTCs" to erase the DTC.

HOW TO READ DATA LIST

Required Special Tools:

• MB991958: Diagnostic Tool (MUT-III Sub Assembly)

• MB991824: Vehicle Communication Interface (V.C.I.)

• MB991827: MUT-III USB Cable

• MB991910: MUT-III Main Harness A (Vehicles with CAN 

communication system)

CAUTION

To prevent damage to diagnostic tool MB991958, always 
turn the ignition switch to the "LOCK" (OFF) position 
before connecting or disconnecting diagnostic tool 
MB991958.

00DB076A

MB991910

DATA LINK

CONNECTOR

MB991824

MB991827

IGNITION SWITCH

CHASSIS ELECTRICAL

54A-13

1. Connect diagnostic tool MB991958 to the data link 

connector.

2. Turn the ignition switch to "ON" position.

3. Select "Interactive Diagnosis" from the start-up screen.

4. Select "System select."

5. Choose "IMMOBILIZER".

6. Select "Data List."

7. Choose an appropriate item and select the "OK" button.

DIAGNOSTIC TROUBLE CODE CHART

M1543007100439

CAUTION

During diagnosis, a DTC 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 DTC code(s). 
If DTC code(s) are set, erase them all.
Use the following chart to develop proper diagnostic 
strategy.

00DB076A

MB991910

DATA LINK

CONNECTOR

MB991824

MB991827

DIAGNOSTIC 
TROUBLE CODE NO. 

DESCRIPTION

REFERENCE PAGE

11

Transponder communication system or radio interference 
of encrypted code.

P.54A-14

12

Encrypted codes are not the same or not registered.

P.54A-18