Mitsubishi L200. Manual - part 159

TROUBLESHOOTING

DIESEL FUEL

13A-432

SYMPTOM PROCEDURES

Inspection Procedure 1: Communication with Engine-ECU Is Not Possible

TROUBLESHOOTING

DIESEL FUEL

13A-433

OPERATION

• The M.U.T.-III receives data from the engine-ECU 

via the CAN bus line.

PROBABLE CAUSES

• Damaged connector (Engine-ECU connector, 

diagnosis connector)

1 2 3 4 5 6

12

11

10

1516

14

13

9

7 8

AKA00111

101 102

103104 105 106107 108109 110 111112 113 114115

118119 120 121122 123124 125126127 128 129130

131132 133 134135 136137 138139140 141142 143

146147 148 149150 151152 153154155 156 157158

117

145

116

144

7

6

22

11

C-53*¹ or
C-35*²

20*¹ or
21*²

9*¹ or
10*²

109

108

R

B

R

B

J/C (CAN 2)

C-01

CAN Communication Circuit

Engine-ECU

C-103

16

14

6

21

10

22

11

4

5

R

J/C (CAN 1)

C-119

B

R-L

B-L

W-B

B

B

Diagnosis connector

C-22

MU803797

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

12

15A

J/B

13

1

C-213

C-208

W

Fusible link 20

NOTE

*1: L.H. drive vehicles
*2: R.H. drive vehicles

AB

TROUBLESHOOTING

DIESEL FUEL

13A-434

• Damaged harness (Open or short circuit in the 

engine-ECU power supply circuit, open circuit 
between diagnosis connector and J/B connector, 
and open circuit between diagnosis connector 
and earth)

• Failed CAN bus line

• Failed M.U.T.-III

• Failed engine-ECU

DIAGNOSIS PROCEDURE

STEP 1. Check the V.C.I. indicator lamp 
illuminates.

• Connect the M.U.T.-III to the diagnosis connector.

Q: Is the V.C.I. indicator lamp illuminates in a green 

colour?
YES : 

CAN bus diagnosis (Refer to GROUP 54C 

− 

Troubleshooting 

− Can Bus Diagnosis Table 

).

NO : 

Go to Step 2 .

AK600277

Diagnosis

connector

MB991827

MB991824 

MB991910

<L.H. drive vehicles>

Diagnosis

connector

MB991827

MB991824 

MB991910

<R.H. drive vehicles>

AC

TROUBLESHOOTING

DIESEL FUEL

13A-435

STEP 2. Connector check: C-22 diagnosis 
connector

Q: Is the check result normal?

YES : 

Go to Step 3 .

NO : 

Repair or replace.

STEP 3. Perform voltage measurement for open 
circuit at C-22 diagnosis connector.

• Voltage between terminal No. 16 and earth.

OK: System voltage

Q: Is the check result normal?

YES : 

Go to Step 4 .

NO : 

Repair harness between C-22 (terminal No. 
16) diagnosis connector and C-208 
(terminal No. 13) J/B connector.

AK700805

1 2 3 4 5 6

12

11

10

1516

14

13

9

7 8

C-22 (B)

Connector: C-22

<R.H. drive vehicles>

C-22 (B)

AB

Harness side connector

<L.H. drive vehicles>

AK700805

1 2 3 4 5 6

12

11

10

1516

14

13

9

7 8

C-22 (B)

Connector: C-22

<R.H. drive vehicles>

C-22 (B)

AB

Harness side connector

<L.H. drive vehicles>