Mitsubishi Grandis. Manual - part 854

 

  Index      Mitsubishi     Mitsubishi Grandis - service repair manual

 

Search            

 

 

 

 

 

 

 

 

 

Content   ..  852  853  854  855   ..

 

 

Mitsubishi Grandis. Manual - part 854

 

 

TROUBLESHOOTING <A/T>

AUTOMATIC TRANSMISSION (FF)

23A-83

DIAGNOSIS

STEP 1. MUT-III data list

Item 54: Relay voltage (Refer to data list reference 
table 

P.23A-117

).

Q: Is the check result normal?

YES : 

Intermittent malfunction (Refer to GROUP 

00 

− How to Cope with Intermittent 

Malfunction 

P.00-5

).

NO : 

Go to Step 2.

STEP 2. Check the A/T control relay connector

Refer to 

P.23A-130

.

Q: Is the check result normal?

YES : 

Go to Step 3.

NO : 

Replace the A/T control relay.

STEP 3. Connector check: B-14X A/T control 
relay connector

Check for the contact with terminals.

Q: Is the check result normal?

YES : 

Go to Step 4.

NO : 

Repair the defective connector.

STEP 4. Measure the voltage at A/T control relay 
connector B-14X.

Disconnect the A/T control relay, and measure the 
voltage between terminal No.4 and earth at the relay 
box side.

OK: System voltage

Q: Is the check result normal?

YES : 

Go to Step 8.

NO : 

Go to Step 5.

STEP 5. Connector check: A-16 intermediate 
connector

Check for the contact with terminals.

Q: Is the check result normal?

YES : 

Go to Step 6.

NO : 

Repair the defective connector.

STEP 6. Check the harness between A/T control 
relay connector B-14X terminal No.4 and battery.

Check the power supply line for short or open circuit.

Q: Is the check result normal?

YES : 

Go to Step 7.

NO : 

Repair the wiring harness.

STEP 7. MUT-III data list

Item 54: Relay voltage (Refer to data list reference 
table 

P.23A-117

).

Q: Is the check result normal?

YES : 

The trouble can be an intermittent 

malfunction (Refer to GROUP 00 

− How to 

Cope with Intermittent Malfunction 

P.00-5

).

NO : 

Replace the engine-A/T-ECU.

AC311979AC

B-14X

Connector: B-14X

Front of 
vehicle

Relay box 
side

AC311979AC

B-14X

Connector: B-14X

Front of 
vehicle

Relay box 
side

AC310403

AJ

Connector: A-16

A-16 (B)

11

7 8

10

9

1 2

4

3

5

12

6

AC311979AC

B-14X

Connector: B-14X

Front of 
vehicle

Relay box 
side

TROUBLESHOOTING <A/T>

AUTOMATIC TRANSMISSION (FF)

23A-84

STEP 8. Measure the voltage at the A/T control 
relay connector B-14X.
(1) Turn the ignition switch to the ON position.

(2) Disconnect the A/T control relay, and measure 

the voltage between terminal No.3 and earth at 
the relay box side.

OK: System voltage

Q: Is the check result normal?

YES : 

Go to Step 11.

NO : 

Go to Step 9.

AC311979AC

B-14X

Connector: B-14X

Front of 
vehicle

Relay box 
side

TROUBLESHOOTING <A/T>

AUTOMATIC TRANSMISSION (FF)

23A-85

STEP 9. Connectors check: C-116 J/C (4), C-33 
J/C (7) <RHD>, C-18 intermediate connector, 
C-203 J/B connector

Check for the contact with terminals.

AC310615

AT

Connectors: C-18, C-116
<LHD>

C-18

2

6

1

5

9

3

7 8

10

4

C-116

23

12

1

7

29

18

4

26

15

1314

25

24

2 3

1617

28

27

5 6

10

32

21

1920
3031

8 9

22
33

11

C-18

C-116

AC310628AX

Connectors: C-18, C-116
<RHD>

C-18

C-18

2

6

1

5

9

3

7 8

10

4

C-116

23

12

1

7

29

18

26

13

25

24

2

28

27

4

15

14

3

1617

5 6

10

32

21

1920
3031

8 9

22
33

11

C-18

C-116

AC310631AV

C-33

Connector: C-33
<RHD>

2

1

3

13

12

14

21

10

5

4

6

16

15

17

7 8 9

19

18

20

11

22

AC310623

Connectors: C-203 <LHD>

AL

Harness side

10

1

6

14

5

12

13

4

11

7

2

3

8

9

Junction block (Front view)

AC310618

Connectors: C-203 <RHD>

AK

Harness side

10

1

6

14

5

12

13

4

11

7

2

3

8

9

Junction block (Front view)

TROUBLESHOOTING <A/T>

AUTOMATIC TRANSMISSION (FF)

23A-86

Q: Is the check result normal?

YES : 

Go to Step 10.

NO : 

Repair the defective connector.

STEP 10. Check the wiring harness between A/T 
control relay connector B-14X terminal No.3 and 
junction block connector C-203 terminal No.12.

Check the power supply line for short or open circuit.

Q: Is the check result normal?

YES : 

Go to Step 7.

NO : 

Repair the wiring harness.

STEP 11. Measure the voltage at engine-A/T-ECU 
connector C-114.
(1) Install the A/T control relay.
(2) Turn the ignition switch to the ON position.

(3) Measure the voltage between engine-A/T-ECU 

connector C-114 terminal No.123, No.124 and 
earth.

OK: System voltage

Q: Is the check result normal?

YES : 

Go to Step 14.

NO : 

Go to Step 12.

AC311979AC

B-14X

Connector: B-14X

Front of 
vehicle

Relay box 
side

AC310623

Connectors: C-203 <LHD>

AL

Harness side

10

1

6

14

5

12

13

4

11

7

2

3

8

9

Junction block (Front view)

AC310618

Connectors: C-203 <RHD>

AK

Harness side

10

1

6

14

5

12

13

4

11

7

2

3

8

9

Junction block (Front view)

AC311284 AI

Connector: C-114 <LHD>

Connector: C-114 <RHD>

Engine-A/T-ECU

C-114 (GR)

C-114 (GR)

Engine-A/T-ECU

Harness side

124 123

130

131

132

133
141 140 139 138
146 145

129
137

128
136

127126

135
143

121
125
134
142

144

122

 

 

 

 

 

 

 

Content   ..  852  853  854  855   ..