Mitsubishi L200. Manual - part 819

TROUBLESHOOTING

CONTROLLER AREA NETWORK (CAN)

54C-35

terminal No.3 (CAN_H) and body earth

OK: 4.0 V or less

AC209365

AC209365

AC209365

Test 
harness

AC209365

AC209365

AC209365RV

Harness side: C-119

(4) Voltage between C-119 joint connector (CAN1) 

terminal No.14 (CAN_L) and body earth

OK: 4.0 V or less

(5) Disconnect the negative battery terminal.

CAUTION

Strictly observe the specified wiring harness 
repair procedure. For details refer to 

P.54C-7

.

Q: Is the check result normal?

YES : 

<4.0 V or less> Go to Step 18.

NO  : 

<More than 4.0 V> Go to Step 17.

STEP 17. M.U.T.-III CAN bus diagnostics [steering 
wheel sensor connector disconnected]

AC903858

Connector: C-308 <LHD>

AK

AC903869

Connector: C-308 <RHD>

AK

(1) Disconnect steering wheel sensor connector C-

308, and diagnose by using the M.U.T.-III.

ACA01247

: Red section on screen

AB

ETACS

DISPLAY

ABS/ASC

SAS

YR/G

A/C

AT

ENGINE

JC

JC

M.U.T.

(2) Diagnose CAN bus lines, and check if M.U.T.-III 

screen is as shown in the illustration.

Q: Does M.U.T.-III screen correspond to the 

illustration?
YES : 

Repair the wiring harness between joint 

connector (CAN1) and the steering wheel 
sensor connector.

NO : 

Check the steering wheel sensor connector, 
and repair if necessary. If the steering wheel 
sensor connector is in good condition, repair 
the steering wheel sensor power supply 
circuit.

TROUBLESHOOTING

CONTROLLER AREA NETWORK (CAN)

54C-36

STEP 18. Check the CAN line between joint 
connector (CAN1) and the G and yaw rate sensor. 
Voltage measurement at C-119 joint connector 
(CAN1).

CAUTION

A digital multimeter should be used. For details 
refer to 

P.54C-7

.

CAUTION

The test wiring harness should be used. For 
details refer to 

P.54C-7

.

AC903853

BM

Connector: C-119 <LHD>

C-119 (GR)

AC903868

CM

Connector: C-119 <RHD>

C-119 (GR)

(1) Disconnect joint connector (CAN1), and measure 

at the wiring harness side.

(2) Connect the negative battery terminal, and turn 

the ignition switch to the ON position.

AC209365

AC209365

AC209365

AC209365

AC209365RW

Harness side: C-119

Test harness

(3) Voltage between C-119 joint connector (CAN1) 

terminal No.4 (CAN_H) and body earth

OK: 4.0 V or less

AC209365

AC209365

AC209365

Test harness

AC209365

AC209365

AC209365RX

Harness side: C-119

(4) Voltage between C-119 joint connector (CAN1) 

terminal No.15 (CAN_L) and body earth

OK: 4.0 V or less

(5) Disconnect the negative battery terminal.

CAUTION

Strictly observe the specified wiring harness 
repair procedure. For details refer to 

P.54C-7

.

Q: Is the check result normal?

YES <vehicles without A/C> : 

<4.0 V or less> Go 

to Step 22.

YES <vehicles with A/C> : 

<4.0 V or less> Go to 

Step 20.

NO  : 

<More than 4.0 V> Go to Step 19.

STEP 19. M.U.T.-III CAN bus diagnostics [G and 
yaw rate sensor connector disconnected]

AC903853

BN

Connector: C-144 <LHD>

C-144 (GR)

Harness side

AC903865 AV

Connector: C-144 <RHD>

C-144 (GR)

Harness side

(1) Disconnect G and yaw rate sensor connector C-

TROUBLESHOOTING

CONTROLLER AREA NETWORK (CAN)

54C-37

144, and diagnose by using the M.U.T.-III.

ACA01247

: Red section on screen

AB

ETACS

DISPLAY

ABS/ASC

SAS

YR/G

A/C

AT

ENGINE

JC

JC

M.U.T.

(2) Diagnose CAN bus lines, and check if M.U.T.-III 

screen is as shown in the illustration.

Q: Does M.U.T.-III screen correspond to the 

illustration?
YES : 

Repair the wiring harness between joint 

connector (CAN1) and the G and yaw rate 
sensor connector.

NO : 

Check the G and yaw rate sensor 
connector, and repair if necessary. If the G 
and yaw rate sensor connector is in good 
condition, repair the G and yaw rate sensor 
power supply circuit.

STEP 20. Check the CAN line between joint 
connector (CAN1) and the A/C-ECU. Voltage 
measurement at C-119 joint connector (CAN1).

CAUTION

A digital multimeter should be used. For details 
refer to 

P.54C-7

.

CAUTION

The test wiring harness should be used. For 
details refer to 

P.54C-7

.

AC903853

BM

Connector: C-119 <LHD>

C-119 (GR)

AC903868

CM

Connector: C-119 <RHD>

C-119 (GR)

(1) Disconnect joint connector (CAN1), and measure 

at the wiring harness side.

(2) Connect the negative battery terminal, and turn 

the ignition switch to the ON position.

AC209365

AC209365

AC209365

AC209365

AC209365RY

Harness side: C-119

Test harness

(3) Voltage between C-119 joint connector (CAN1) 

TROUBLESHOOTING

CONTROLLER AREA NETWORK (CAN)

54C-38

terminal No.6 (CAN_H) and body earth

OK: 4.0 V or less

AC209365

AC209365

AC209365

Test harness

AC209365

AC209365

AC209365RZ

Harness side: C-119

(4) Voltage between C-119 joint connector (CAN1) 

terminal No.17 (CAN_L) and body earth

OK: 4.0 V or less

(5) Disconnect the negative battery terminal.

CAUTION

Strictly observe the specified wiring harness 
repair procedure. For details refer to 

P.54C-7

.

Q: Is the check result normal?

YES : 

<4.0 V or less> Go to Step 22.

NO : 

<More than 4.0 V> Go to Step 21.

STEP 21. M.U.T.-III CAN bus diagnostics [A/C-
ECU connector disconnected]

AC903856BS

Connector: C-43 <LHD>

Harness side

AC903868

CN

Connector: C-43 <RHD>

Harness side

(1) Disconnect A/C-ECU connector C-43, and 

diagnose by using the M.U.T.-III.

ACA01247

: Red section on screen

AB

ETACS

DISPLAY

ABS/ASC

SAS

YR/G

A/C

AT

ENGINE

JC

JC

M.U.T.

(2) Diagnose CAN bus lines, and check if M.U.T.-III 

screen is as shown in the illustration.

Q: Does M.U.T.-III screen correspond to the 

illustration?
YES : 

Repair the wiring harness between joint 

connector (CAN1) and the A/C-ECU 
connector.

NO : 

Check the A/C-ECU connector, and repair if 
necessary. If the A/C-ECU connector is in 
good condition, repair the A/C-ECU power 
supply circuit. (Refer to GROUP 55B .)