Mitsubishi L200. Manual - part 777

RV METER

CHASSIS ELECTRICAL

54A-475

• Malfunction of the vehicle speed sensor

• Incorrect function type setting

• Damaged harness wires and connectors

DIAGNOSIS PROCEDURE

STEP 1. Check the function type in the service 
mode.
Check that the function type is set as 1 or 3 in the 
service mode. (Refer to 

P.54A-457

.)

Q: Is the check result satisfactory?

YES : 

Go to Step 2

NO : 

Set the function type again in the service 
mode, and recheck the trouble symptom.

STEP 2. M.U.T.-III CAN bus diagnostics
Use the M.U.T-III to diagnose the CAN bus lines.

Q: Is the check result satisfactory?

YES : 

Go to Step 3.

NO : 

Repair the CAN bus lines (Refer to GROUP 
54C, Diagnosis - Can Bus Diagnostics Table 
). After diagnosing the CAN bus lines, go to 
Step 3.

STEP 3. M.U.T-III other system diagnosis code.
Check whether the DIESEL system-related diagno-
sis code is set.

Q: Is the diagnosis code set?

YES : 

Diagnose DIESEL system. (Refer to 

GROUP 13A 

−, Troubleshooting .) After 

diagnosing the DIESEL system, go to Step 
4.

NO : 

Go to Step 4

STEP 4. M.U.T.-III diagnosis code.
When the ignition switch is turned to the "LOCK" 
(OFF) position, check that the RV meter does not set 
the diagnosis code.

Q: Is the diagnosis code set?

YES : 

Refer to diagnosis code chart 

P.54A-462

.

NO : 

Go to Step 5

STEP 5. Check the speedometer.
Check whether the speedometer works nor-
mally.(Refer to 

P.54A-87

.)

Q: Does the speedometer work normally?

YES : 

Go to Step 6

NO : 

Diagnose the combination meter. (Refer to 
Combination meter 

− Troubleshooting 

P.54A-46

.)

STEP 6. Connector check: RV meter connector C-
171, joint connector C-127

Q: Is the check result normal?

YES : 

Go to Step 7

NO : 

Repair the defective connector.

AC903853

Connector: C-127 <LHD>

AE

C-127 (GR)

AC903865

Connector: C-127 <RHD>

AD

C-127 (GR)

AC903856

Connector: C-171 <LHD>

AY

Harness side

C-171 (GR)

AC903868

Connector: C-171 <RHD>

BQ

Harness side

C-171 (GR)

RV METER

CHASSIS ELECTRICAL

54A-476

STEP 7. Check the harness wire between C-171 
RV meter connector terminal No.13 and C-127 
joint connector terminal No.18.

• Check the signal line circuit for open circuit and 

short circuit.

Q: Is the check result normal?

YES : 

Go to Step 8

NO : 

Repair the wiring harness.

STEP 8. Connector check: fuel gauge unit 
connector F-09

Q: Is the check result normal?

YES : 

Go to Step 9

NO : 

Repair the defective connector.

STEP 9. Check the fuel gauge unit.
Check the fuel gauge unit 

P.54A-88

.

Q: Is the check result normal?

YES : 

Go to Step 10

NO : 

Replace the fuel gauge unit.

STEP 10. Measure the resistance at F-09 fuel 
gauge unit connector.

(1) Disconnect the connector, and measure at the 

wiring harness side.

(2) Measure the resistance between F-09 fuel gauge 

unit connector terminal No.2 and body earth

OK: Continuity exists (2 

Ω or less)

Q: Is the check result normal?

AC903853

Connector: C-127 <LHD>

AE

C-127 (GR)

AC903865

Connector: C-127 <RHD>

AD

C-127 (GR)

AC903856

Connector: C-171 <LHD>

AY

Harness side

C-171 (GR)

AC903868

Connector: C-171 <RHD>

BQ

Harness side

C-171 (GR)

AC903957AB

Connector: F-09

Harness side

<Vehicles without 
rear body>

AC903957AB

Connector: F-09

Harness side

<Vehicles without 
rear body>

AC403234

Connector F-09 
(Harness side)

FA

RV METER

CHASSIS ELECTRICAL

54A-477

YES : 

Go to Step 12

NO : 

Go to Step 11

STEP 11. Check the harness wire between F-09 
fuel gauge unit connector terminal No.2 and 
body earth.

• Check the earth wires for open circuit.

Q: Is the check result normal?

YES : 

Retest the system.

NO : 

Repair the wiring harness.

STEP 12. Check the wiring harness between C-
171 RV meter connector terminal No.9 and F-09 
fuel gauge unit connector terminal No.1.

NOTE: 

Prior to the wiring harness inspection, check the 
intermediate connector C-30, and repair if necessary.

• Check the input line circuit for open circuit and 

short circuit.

Q: Is the check result normal?

YES : 

Go to Step 13

NO : 

Repair the wiring harness.

AC903957AB

Connector: F-09

Harness side

<Vehicles without 
rear body>

AC903856

Connectors: C-30, C-171 <LHD>

BA

Harness side

C-171 (GR)

C-30

C-171

C-30

AC903868

Connector: C-171 <RHD>

BQ

Harness side

C-171 (GR)

AC903957AB

Connector: F-09

Harness side

<Vehicles without 
rear body>

AC903865

Connector: C-30 <RHD>

AN

RV METER

CHASSIS ELECTRICAL

54A-478

STEP 13. Recheck for malfunction.

Q: Is a malfunction eliminated?

YES : 

If no malfunctions are found in all steps, an 

intermittent malfunction is suspected. Refer 
to GROUP 00, How to Use Troubleshooting/
Inspection Service Points 

− How to Cope 

with Intermittent Malfunction .

NO : 

Replace the RV meter.

Inspection Procedure 3: The ambient air temperature is not displayed normally. <Vehicles without 
auto A/C>

CIRCUIT OPERATION

• For the vehicles without the auto A/C, the RV 

meter is connected with the ambient air tempera-
ture sensor via harness wires. The ambient tem-
perature is calculated with the resistance reading 
of the ambient air temperature sensor. Also, the 
ambient temperature displayed on the RV meter 
is corrected by the vehicle speed pulse signal of 
the vehicle speed sensor.

• If the function type is set as 1 or 2 by mistake, the 

RV meter tries to acquire the ambient tempera-
ture information from the A/C-ECU by the CAN 
communication, and the ambient temperature 
cannot be displayed.

COMMENTS ON TROUBLE SYMPTOM
When other indications are normal, the malfunction 
of ambient air temperature sensor is considered. 

PROBABLE CAUSES

• Malfunction of the ambient air temperature sen-

sor 

• Damaged harness wires and connectors

Ambient Air Temperature Display Circuit

ENGINE 
CONTROL 
RELAY

RV METER

AMBIENT AIR 
TEMPERATURE 
SENSOR

Wire colour code 
B : Black     LG : Light green     G : Green     L : Blue     W : White     Y : Yellow     SB : Sky blue 
BR : Brown     O : Orange     GR : Grey     R : Red     P : Pink     V : Violet     PU : Purple     SI : Silver

VEHICLE 
SPEED 
SENSOR