Mitsubishi L200. Manual - part 825

TROUBLESHOOTING

CONTROLLER AREA NETWORK (CAN)

54C-59

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. Resistance 
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.

CAUTION

When measuring the resistance, disconnect the 
negative battery terminal. For details refer to 

P.54C-7

.

(2) Ensure that the negative battery terminal is 

disconnected.

AC209364

AC209364UK

Harness side: C-119

Test harness

(3) Resistance between C-119 joint connector 

TROUBLESHOOTING

CONTROLLER AREA NETWORK (CAN)

54C-60

(CAN1) terminal No.6 (CAN_H) and body earth

OK: 1 k

Ω or more

AC209364

AC209364UL

Test harness

Harness side: C-119

(4) Resistance between C-119 joint connector 

(CAN1) terminal No.17 (CAN_L) and body earth

OK: 1 k

Ω or more

CAUTION

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

P.54C-7

.

Q: Is the check result normal?

YES : 

<1 k

Ω or more> Go to Step 22.

NO  : 

<Less than 1 k

Ω > 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 .)

TROUBLESHOOTING

CONTROLLER AREA NETWORK (CAN)

54C-61

STEP 22. Check the CAN line between joint 
connector (CAN1) and the diagnosis connector. 
Resistance 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.

CAUTION

When measuring the resistance, disconnect the 
negative battery terminal. For details refer to 

P.54C-7

.

(2) Ensure that the negative battery terminal is 

disconnected.

AC209364

AC209364UM

Harness side: C-119

Test harness

(3) Resistance between C-119 joint connector 

(CAN1) terminal No.10 (CAN_H) and body earth

OK: 1 k

Ω or more

AC209364

AC209364UN

Test harness

Harness side: C-119

(4) Resistance between C-119 joint connector 

(CAN1) terminal No.21 (CAN_L) and body earth

OK: 1 k

Ω or more

CAUTION

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

P.54C-7

.

Q: Is the check result normal?

YES : 

<1 k

Ω or more> Repair the intermediate 

connector C-53 <LHD> or C-35 <RHD>, or 
the wiring harness between joint connector 
(CAN1) and the intermediate connector C-
53 <LHD> or C-35 <RHD>.

NO : 

<Less than 1 k

Ω > Repair the diagnosis 

connector, or the wiring harness between 
joint connector (CAN1) and the diagnosis 
connector.

TROUBLESHOOTING

CONTROLLER AREA NETWORK (CAN)

54C-62

STEP 23. M.U.T.-III CAN bus diagnostics [engine-
ECU connector disconnected]

AC903853

BV

Connector: C-103 <LHD>

C-103 (B)

Harness side

AC903865 AY

Connector: C-103 <RHD>

Harness side

C-103 (B)

(1) Disconnect engine-ECU connector C-103 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 : 

Go to Step 25.

NO : 

Check the engine-ECU connector, and 
repair if necessary. If the engine-ECU 
connector is in good condition, go to Step 
24.

STEP 24. M.U.T.-III CAN bus diagnostics (retest 
the system)
Diagnose CAN bus lines, and check if M.U.T.-III 
screen shows normal state.

Q: Is the check result normal?

YES : 

The trouble can be an intermittent 

malfunction (Refer to GROUP 00 

− How to 

use Troubleshooting/inspection Service 
Points 

− How to Cope with Intermittent 

Malfunction ).

NO : 

Check the engine-ECU connector, and 
repair if necessary. If the engine-ECU 
connector is in good condition, replace the 
engine-ECU.

STEP 25. M.U.T.-III CAN bus diagnostics [ETACS-
ECU connector disconnected]

AC509934

Connector: C-219 <LHD>

AD

C-219 (GR)

Harness side

Junction block

AC509943

Connector: C-219 <RHD>

AB

C-219 (GR)

Harness side

Junction block
 (Rear view)

(1) Disconnect ETACS-ECU connector C-219, 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?