Mitsubishi L200. Manual - part 816

TROUBLESHOOTING

CONTROLLER AREA NETWORK (CAN)

54C-23

DIAGNOSIS PROCEDURE

STEP 1. Check the CAN bus lines. Voltage 
measurement at C-22 diagnosis connector.

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

.

NOTE: This inspection allows you to check that there 
is a short to power supply in either CAN_H line or 
CAN_L line. Thus, in the following steps, check the 
CAN bus line that is defective.

AC903856BQ

Connector: C-22 <LHD>

C-22 (B)

Harness side 
(Front side)

AC903868

CK

C-22 (B)

Connector: C-22 <RHD>

Harness side 
(Front side)

AC903853

BV

Connector: C-103 <LHD>

C-103 (B)

Harness side

AC903865 AY

Connector: C-103 <RHD>

Harness side

C-103 (B)

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)

TROUBLESHOOTING

CONTROLLER AREA NETWORK (CAN)

54C-24

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

ETACS-ECU connector C-219, and measure the 
voltage at the harness side of diagnosis 
connector C-22.

(2) Connect the negative battery terminal, and turn 

the ignition switch to the ON position.

AC209365

AC209365

AC209365PJ

Harness side: C-22

Test 
harness

(3) Voltage between C-22 diagnosis connector 

terminal No.6 (CAN_H) and body earth

OK: 4.0 V or less

AC209365

Harness side: C-22

Test 
harness

AC209365

AC209365

AC209365PK

(4) Voltage between C-22 diagnosis connector 

terminal No.14 (CAN_L) and body earth

OK: 4.0 V or less

(5) Disconnect the negative battery terminal.

Q: Is the check result normal?

YES : 

<Both of the measurement results show 4.0 

V or less> Go to Step 23  .

NO : 

<Either of CAN_H line or CAN_L line the 
measurement results show more than 4.0 
V> Go to Step 2.

TROUBLESHOOTING

CONTROLLER AREA NETWORK (CAN)

54C-25

STEP 2. Check the CAN line. Voltage 
measurement at C-53 <LHD> or C-35 <RHD> 
intermediate connector.

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

Connector: C-53 <LHD>

BI

AC903865

Connector: C-35 <RHD>

AQ

(1) Disconnect the intermediate connector, and 

measure at its male-side intermediate connector 
(at the control wiring harness side).

(2) Connect the negative battery terminal, and turn 

the ignition switch to the ON position.

AC209365VV

Mail side: C-53 <LHD> or C-35 <RHD>

Test harness

(3) Voltage between C-53 <LHD> or C-35 <RHD> 

intermediate connector terminal No.6 (CAN_H) 
and body earth

OK: 4.0 V or less

AC209365VW

Mail side: C-53 <LHD> or C-35 <RHD>

Test harness

(4) Voltage between C-53 <LHD> or C-35 <RHD> 

intermediate connector terminal No.7 (CAN_L) 
and body earth

OK: 4.0 V or less

(5) Disconnect the negative battery terminal.

Q: Is the check result normal?

YES : 

<4.0 V or less> Go to Step 7.

NO : 

<More than 4.0 V> Go to Step 3.

TROUBLESHOOTING

CONTROLLER AREA NETWORK (CAN)

54C-26

STEP 3. Check the CAN line between joint 
connector (CAN2) and the engine-ECU. Voltage 
measurement at C-01 joint connector (CAN2).

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

BL

Connector: C-01 <LHD>

C-01 (L)

AC903865AU

Connector: C-01 <RHD>

C-01 (L)

(1) Disconnect joint connector (CAN2), 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

AC209365RI

Harness side: C-01

Test harness

(3) Voltage between C-01 joint connector (CAN2) 

terminal No.9 (CAN_H) and body earth <LHD>

OK: 4.0 V or less

AC209365

AC209365

AC209365

AC209365

AC209365VT

Harness side: C-01

Test harness

(4) Voltage between C-01 joint connector (CAN2) 

terminal No.10 (CAN_H) and body earth <RHD>

OK: 4.0 V or less

AC209365

AC209365

AC209365

Test harness

AC209365

AC209365

AC209365RJ

Harness side: C-01

(5) Voltage between C-01 joint connector (CAN2) 

terminal No.20 (CAN_L) and body earth <LHD>

OK: 4.0 V or less

AC209365

AC209365

AC209365

Test harness

AC209365

AC209365

AC209365VU

Harness side: C-01

(6) Voltage between C-01 joint connector (CAN2) 

terminal No.21 (CAN_L) and body earth <RHD>

OK: 4.0 V or less

(7) Disconnect the negative battery terminal.

Q: Is the check result normal?