Mitsubishi 380. Manual — part 895

COMBINATION METER ASSEMBLY

CHASSIS ELECTRICAL

54A-114

TROUBLESHOOTING HINTS

• Refer to circuit diagrams GROUP-

90

• Refer to configuration diagrams GROUP-

80

• The wiring harness or connectors may have

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

• Injector failure.

• Open or shorted injector circuit, harness dam-

age, or connector damage.

• Engine-ECU failed.

• Combination meter power and ground circuits

may be defective.

• Trip computer/Combination meter malfunction.

DIAGNOSIS

Required Special Tools:

• Diagnostic Tool (MUT-III Sub Assembly)

• MB991824: V.C.I.

• MB991827: USB Cable

• MB991910: Main Harness A

• MB991658: Test Harness
• MB992044: ENGINE ECU Check Harness

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

combination meter works normally.

54DB019A

CONNECTOR: C-101

HARNESS SIDE

COMBINATION METER ASSEMBLY

CHASSIS ELECTRICAL

54A-115

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

combination meter works normally.

54DB019A

CONNECTOR: C-101

HARNESS SIDE

AC209365

CONNECTOR C-101
(HARNESS SIDE)

HT

COMBINATION METER ASSEMBLY

CHASSIS ELECTRICAL

54A-116

STEP 4. Measure the voltage at combination meter
connector C-101 in order to power supply circuit to
combination meter (IG1 power supply).
(1) Disconnect combination meter connector C-101, and

measure at the wiring harness side.

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

(3) Measure the voltage between terminal 12 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 6.
NO : Go to Step 5.

STEP 5. Check the wiring harness between combination
meter connector C-101 (terminal 12) and the ignition
switch (IG1)

NOTE: Also check junction block connector C-211 and C-215
for loose, corroded, or damaged terminals, or terminals pushed
back in the connector. If inspecting junction block connector
C-211 or C-215 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 12) and the ignition switch
(IG1) in good condition?
YES : Retest the system.
NO : Repair the wiring harness. Check that the

combination meter works normally.

54DB019A

CONNECTOR: C-101

HARNESS SIDE

AC209365

CONNECTOR C-101
(HARNESS SIDE)

HU

25DB096A

CONNECTORS: C-211, C-215

HARNESS SIDE

C-211

HARNESS SIDE

C-215

COMBINATION METER ASSEMBLY

CHASSIS ELECTRICAL

54A-117

STEP 6. Measure the resistance at combination meter
connector C-101 in order to the ground circuit to the
combination meter.
(1) Disconnect combination meter connector C-101, and

measure at the wiring harness side.

(2) Measure the resistance value between terminal 3, 5 and

ground.

• The resistance should be 2 ohms or less.

Q: Is the measured resistance 2 ohms or less?

YES : Go to Step 8.
NO : Go to Step 7.

STEP 7. Check the wiring harness between combination
meter connector C-101 (terminal 3 and 5) and ground.
Q: Is the wiring harness between combination meter

connector C-101 (terminal 3 and 5) and ground in good
condition?
YES : Retest the system.
NO : Repair the wiring harness. Check that the

combination meter works normally.

STEP 8. Retest the system.

Q: Is the check result satisfactory?

YES : Go to Step 9
NO : Replace the combination meter.

54DB019A

CONNECTOR: C-101

HARNESS SIDE

AC209364

CONNECTOR C-101
(HARNESS SIDE)

JR

54DB019A

CONNECTOR: C-101

HARNESS SIDE