Mitsubishi 380. Manual — part 899

COMBINATION METER ASSEMBLY

CHASSIS ELECTRICAL

54A-130

STEP 4. Check the speedometer and buzzer function.
Check the input signals from the following switch:

• Ignition switch: ON

Use diagnostic tool MB991958 to enter simulated vehicle
speed.
(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 "Meter" .
(6) Select "Simulated vehicle Speed Output."
(7) Confirm if speed alarm "BEEPS"

Q: Does speed alarm "BEEP" when set speed is exceeded?

YES : The procedure is complete.
NO : Replace the ETACS-ECU.

00DB076A

MB991910

DATA LINK

CONNECTOR

MB991824

MB991827

COMBINATION METER ASSEMBLY

CHASSIS ELECTRICAL

54A-131

INSPECTION PROCEDURE 16: Speed alarm set speed cannot be adjusted and/ or turned off and/ or
operating mode cannot be changed.

NOTE: This troubleshooting procedure requires the
use of diagnostic tool MB991958 and SWS monitor
kit MB991813. For details on how to use the SWS
monitor, refer to "How to connect SWS monitor

P.54B-13

."

.

CIRCUIT OPERATION

The ETACS-ECU controls the speed alarm warning
tone alarm, based on the signals from the switches
and sensors below.

• Ignition switch (IG1): ON

• mode switch signals "MODE", "UP" and "DOWN".

.

TECHNICAL DESCRIPTION (COMMENT)

If the speed alarm mode switch does not work, con-
nector(s), wiring harness in the mode switch and the
combination meter circuits may be defective.

.

TROUBLESHOOTING HINTS

• Refer to circuit diagrams GROUP-

90

• Refer to configuration diagrams GROUP-

80

• Mode switch input signals to the combination

meter.

• The wiring harness or connectors may have

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

• The trip computer/ combination meter may be

defective

• The Engine-ECU, A/T-ECU or ETACS-ECU may

be defective

ETACS-

ECU

MODE SWITCH

SIGNAL

· IGNITION SWITCH (IG1)

COMBINATION

METER

CPU

CAN COMMUNICATION LINE

(CAN_L LINE)

CAN COMMUNICATION LINE

(CAN_H LINE)

Mode Switch Function Circuit

16DB585A

MODE
SWITCH

16DB586A

54DB019A

CONNECTOR: C-101

HARNESS SIDE

COMBINATION METER ASSEMBLY

CHASSIS ELECTRICAL

54A-132

REMOVAL SERVICE POINT

.

<<A>> MODE SELECT SWITCH REMOVAL

Remove the mode select switch by removing the screws that
attach the switch to the cover.

MODE SELECT SWITCH CONTINUITY CHECK

NOTE: If any of the below specifications are not met, replace
the mode switch.

DIAGNOSIS

Required Special Tool:

• MB991223: Harness set

STEP 1. Check combination meter connector C-101 for
loose, corroded or damaged terminals, or terminals
pushed back in the connector.
Q: Is combination meter connector C-101 in good

condition?
YES : Go to Step 2.
NO : Repair or replace the component(s). Refer to GROUP

00E, Harness Connector Inspection

P.00E-2

. The

mode switch and combination meter works normally.

SWITCH POSITION TESTER

CONNECTION

SPECIFIED
CONDITION

Mode select "ON"
(depress)

1

− 6

Less than 2 ohms

Mode select "OFF"
(released)

1

− 6

Open circuit

Mode select "UP"
(depress)

2

− 6

Less than 2 ohms

Mode select "UP"
(released)

2

− 6

Open circuit

Mode select
"DOWN" (depress)

5

− 6

Less than 2 ohms

Mode select
"DOWN" (released)

5

− 6

Open circuit

16DB589A

MODE SELECT SWITCH

54DB019A

CONNECTOR: C-101

HARNESS SIDE

COMBINATION METER ASSEMBLY

CHASSIS ELECTRICAL

54A-133

STEP 2. Measure at combination meter connector C-101 in
order to power supply circuit to combination meter
(battery power supply).
(1) Disconnect combination meter connector C-101, and

measure at the wiring harness side.

(2) Turn the ignition switch to "LOCK" (OFF) position.

(3) Measure the voltage between terminal 1 and ground.

• The voltage should measure approximately 12 volts

(battery positive voltage).

Q: Is the measured voltage approximately 12 volts (battery

positive voltage)?
YES : Go to Step 4.
NO : Go to Step 3.

STEP 3. Check the wiring harness between combination
meter connector C-101 (terminal 1) and the fuse No.22.

NOTE: Also check intermediate connector C-29 for loose, cor-
roded, or damaged terminals, or terminals pushed back in the
connector. If intermediate connector C-29 is damaged, repair or
replace. Refer to GROUP 00E, Harness Connector Inspection

P.00E-2

.

Q: Is the wiring harness between combination meter

connector C-101 (terminal 1) and the fuse No.22 in good
condition?
YES : Retest the system.
NO : Repair the wiring harness. Check that the mode

switch and combination meter works normally.

54DB019A

CONNECTOR: C-101

HARNESS SIDE

AC209365

CONNECTOR C-101
(HARNESS SIDE)

HT