Mitsubishi 380. Manual — part 51

SYMPTOM PROCEDURES

SIMPLIFIED WIRING SYSTEM (SWS)

54B-201

STEP 21. Check the wiring harness between horn relay
connector A-06X (terminal 4) and horn (HIGH) connector
A-37 (terminal 1).
Q: Is the wiring harness between horn relay connector

A-06X (terminal 4) and horn (HIGH) connector A-37
(terminal 1) in good condition?
YES : Replace the ETACS-ECU. Verify that the horn sounds

normally.

NO : The wiring harness may be damaged or the

connector(s) may have loose, corroded or damaged
terminals, or terminals pushed back in the connector.
Repair the wiring harness as necessary. Verify that
the horn sounds normally.

AC305992

RELAY BOX SIDE

CONNECTOR: A-06X

AC

FRONT OF VEHICLE

16DB355A

A-36 (B)

CONNECTOR: A-36,A-37

A-37

SYMPTOM PROCEDURES

SIMPLIFIED WIRING SYSTEM (SWS)

54B-202

INSPECTION PROCEDURE E-3: Keyless Entry System: Encrypted code cannot be registered.

.

CIRCUIT OPERATION

The ETACS-ECU operates the encrypted code regis-
ter mode according to the following signals:

• Key reminder switch

• Hazard warning lamp switch

.

TECHNICAL DESCRIPTION (COMMENT)

If the encrypted code register mode cannot be set,
the input circuits from the switches described in
"CIRCUIT OPERATION" or the ETACS-ECU may be
defective.
If the encrypted code register mode can be set but
the transmitter cannot be registered, the transmitter
or the ETACS-ECU may be defective.

.

TROUBLESHOOTING HINTS

• Refer to circuit diagrams GROUP-

90

• Refer to configuration diagrams GROUP-

80

• The key reminder switch may be defective

• The hazard warning lamp switch may be defec-

tive

• The transmitter may be defective

• The ETACS-ECU may be defective

• The wiring harness or connectors may have

loose, corroded, or damaged terminals, or termi-
nals pushed back in the connector

DIAGNOSIS

Required Special Tools:

• MB991223: Harness Set

• 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

STEP 1. Verify trouble symptom.

Q: Can the encrypted code register mode be set?

YES : Go to Step 3.
NO : Go to Step 2.

ETACS-

ECU

· KEY REMINDER SWITCH

· HAZARD WARNING LIGHT SWITCH

Encrypted Transmitter Code Register Mode

SYMPTOM PROCEDURES

SIMPLIFIED WIRING SYSTEM (SWS)

54B-203

STEP 2. Check the input signal (by using the pulse check
mode of the monitor).
Check the input signals from the following switches:

• Key reminder switch

• Hazard warning lamp switch

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) Connect diagnostic tool MB991958.Refer to "How to

connect SWS monitor

P.54B-13

."

(2) Operate diagnostic tool MB991958 according to the

procedure below to display "Pulse check."
a. Select "Interactive Diagnosis."
b. Select "System select."
c. Select "SWS."
d. Select "Pulse Checking."

(3) Check the switches (see table below) applicable for the

input signal check are operated.

(4) Check diagnostic tool MB991958 sounds or not.

Q: When the key reminder switch and the hazard warning

lamp switch are operated, does diagnostic tool
MB991958 sound in each case?
Buzzer of diagnostic tool MB991958 sounds normally. :

Replace the ETACS-ECU. Verify that the encrypted
code can be registered in the transmitter.

diagnostic tool MB991958 does not sound when the
ignition key is removed and reinserted : Refer to

Inspection Procedure N-1 "ETACS-ECU does not
receive any signal from the key reminder switch

P.54B-432

."

diagnostic tool MB991958 does not sound when the
hazard warning lamp switch is turned from "OFF" to
"ON" : Refer to Inspection Procedure N-2 "ETACS-ECU

does not receive any signal from the hazard warning
lamp switch

P.54B-436

."

ITEM NAME

CHECK CONDITION

Key reminder switch

Remove and reinsert the
ignition key

Hazard warning lamp switch

Turn the hazard warning lamp
switch from "OFF" to "ON"
position.

00DB076A

MB991910

DATA LINK

CONNECTOR

MB991824

MB991827

SYMPTOM PROCEDURES

SIMPLIFIED WIRING SYSTEM (SWS)

54B-204

STEP 3. Check the transmitter.

Q: When the transmitter's battery is replaced, can the

encrypted code be registered?
YES : No action is necessary and testing is complete.
NO : Replace the transmitter. If the encrypted code cannot

be registered using the new transmitter, replace the
ETACS-ECU. Verify that the encrypted code can be
registered in the transmitter.