Suzuki Grand Vitara JB627. Manual - part 222

5A-72 Automatic Transmission/Transaxle: 

DTC Troubleshooting

DTC P2764: Torque Converter Clutch (TCC) Circuit Low

S6JB0B5104045

Wiring Diagram
Refer to “DTC P2763: Torque Converter Clutch (TCC) Circuit High”

DTC Detecting Condition and Trouble Area

DTC Confirmation Procedure

WARNING

!

 

• When performing a road test, select a place where there is no traffic or possibility of a traffic 

accident and be very careful during testing to avoid occurrence of an accident.

• Road test should be carried out with 2 persons, a driver and tester, on a level road.

 

1) Connect scan tool to DLC with ignition switch OFF.
2) Clear DTCs in TCM and ECM memories by using scan tool.
3) Start engine.
4) Keep engine running at idle speed in “P” range for 20 seconds or more.
5) Check DTC, pending DTC and freeze-frame data.

Step

Action

Yes

No

1

Was “A/T System Check” performed?

Go to Step 2.

Go to “A/T System 
Check”.

2

Check TCC pressure control solenoid valve circuit for 
power supply short
1) Disconnect TCM connectors.
2) Check for proper connection to TCM at terminal “E92-3” 

and “E92-5”.

3) If connection is OK, turn ignition switch ON and measure 

voltage between terminal “E92-3” of disconnected 
harness side TCM connector and ground.

Is it 0 – 2 V?

Go to Step 3.

TCC pressure control 
solenoid valve control or 
ground circuit is shorted 
to power supply circuit. 
If circuit is OK, go to 
Step 3.

3

Inspection TCC pressure control solenoid valve
1) Inspection TCC pressure control solenoid valve referring 

to “Solenoid Valves (Shift Solenoid-A, Shift Solenoid-B, 
Shift Solenoid-E, TCC Solenoid, Pressure Control 
Solenoid-A, Pressure Control Solenoid-B, and Pressure 
Control Solenoid-C) Inspection”

Is check results satisfactory?

Intermittent trouble or 
faulty TCM. Check for 
intermittent trouble 
referring to “Intermittent 
and Poor Connection 
Inspection in Section 
00”. If OK, substitute a 
known-good TCM and 
recheck.

Replace TCC pressure 
control solenoid valve 
referring to 
“Transmission Fluid 
Temperature Sensor 
Removal and 
Installation”.

DTC Detecting Condition

Trouble Area

Voltage of TCC pressure control solenoid valve TCM terminal is 
low although TCM is commanding TCC pressure control solenoid 
to turn ON.
(1 driving cycle detection logic)

• TCC pressure control solenoid valve circuit 

open or shorted to ground.

• Malfunction of TCC pressure control solenoid 

valve

• TCM

Automatic Transmission/Transaxle:  5A-73

DTC Troubleshooting

Step

Action

Yes

No

1

Was “A/T System Check” performed?

Go to Step 2.

Go to “A/T System 
Check”.

2

Check TCC pressure control solenoid valve circuit for 
ground short
1) Disconnect TCM connectors.
2) Check for proper connection to TCM at terminals “E92-

3” and “E92-5”.

3) If connection is OK, check continuity between terminal 

“E92-5” of disconnected harness side TCM connector 
and ground.

Is continuity indicated?

TCC pressure control 
solenoid valve control 
and ground circuit is 
shorted to ground. If 
circuit is OK, go to Step 
4.

Go to Step 4.

3

Check TCC pressure control solenoid valve circuit for 
open
1) Check resistance between terminal “E92-3” and “E92-5” 

of disconnected harness side TCM connector.

Is it infinity?

TCC pressure control 
solenoid valve control 
and ground circuit is 
open. If circuit is OK, go 
to Step 4.

Go to Step 4.

4

Inspection TCC pressure control solenoid valve
1) Inspection TCC pressure control solenoid valve referring 

to “Solenoid Valves (Shift Solenoid-A, Shift Solenoid-B, 
Shift Solenoid-E, TCC Solenoid, Pressure Control 
Solenoid-A, Pressure Control Solenoid-B, and Pressure 
Control Solenoid-C) Inspection”.

Is check results satisfactory?

Intermittent trouble or 
faulty TCM. Check for 
intermittent trouble 
referring to “Intermittent 
and Poor Connection 
Inspection in Section 
00”. If OK, substitute a 
known-good TCM and 
recheck.

Replace TCC pressure 
control solenoid valve 
referring to “Solenoid 
Valves (Shift Solenoid-
A, Shift Solenoid-B, 
Shift Solenoid-E, TCC 
Solenoid, Pressure 
Control Solenoid-A, 
Pressure Control 
Solenoid-B, and 
Pressure Control 
Solenoid-C) Removal 
and Installation”.

5A-74 Automatic Transmission/Transaxle: 

DTC U0073: Control Module Communication Bus Off

S6JB0B5104046

Wiring Diagram

WHT

RED

WHT

RED

G44-18

G44-19

G44

[A]

[B]

[C]

[H]

[G]

1

2

3

4

5

6

7

8

9

10

11

14

15

16
36

34 33 32

30 29

24 23

37

18

19

20

G28-8

G28-10

WHT/BLU

WHT/BLU

WHT/RED

WHT/RED E23-9

E23-17

WHT

RED

WHT

RED

E92-17

E92-7

WHT

RED

E91-22
E91-23

WHT

RED

RED

G31-1
G31-3

G31-4

6

5

16 15 14 13 12 11

4 3

24 23

21

22

10 9

8

7

2

1

19

20

18 17

E92

E23

1

2

3

4

5

6

7

8

9

10

11

17

1615141312

2221201918

G28

[F]

G31

E91

1

2

3

4

7

8

9

10

11

14

15

16
36

34

35

24 23

21

22

28 27

25

26

37

39 38

40

18 17

13 12

19

20

1

2

3

10

11

12

16

17

18

15 14 13

19

20

21

25

26

5

6

[I]

E53

[E]

E03

15
16
17
18
19
20
21
22
23
24
25

2
3
4
5
6
7
8
9

10
11
12

1

13

14

26

G31-2

WHT

1

2

3

4

9

5

6

8

7

E03-12

E03-10

E03-6

E03-8

10

11

E53-13

E53-42

E53-44

E53-46

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

33

34

35

36

37

38

39

40

32

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

[D]

8 7

6 5 4 3

2 1

9

10

11

12

13

14

15

16

16

1

15

2

3

4

5

6

7

8

9

10

11

12

13

14

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44

45

46

47

[J]

G45

10 9

3 2 1

WHT

RED G45-9

G45-10

I6JB0B510006-01

[A]: Keyless start control module connector (viewed from harness side)

2. 4WD control module

[B]: ECM connector (viewed from harness side)

3. TCM

[C]: TCM connector (viewed from harness side)

4. Keyless start control module (if equipped)

[D]: DLC connector (viewed from harness side)

5. DLC

[E]: ABS hydraulic unit/control module connector (viewed from harness side)

6. ECM

[F]: Combination meter connector (viewed from harness side)

7. ABS hydraulic unit/control module

[G]: 4WD control module connector (viewed from harness side)

8. Combination meter

[H]: BCM connector (viewed from harness side)

9. Junction connector

[I]: ESP

® control module connector (viewed from harness side)

10. ESP

® control module (ESP® model)

[J]: Steering angle sensor connector (viewed from harness side)

11. Steering angle sensor (ESP

® model)

1: BCM

Automatic Transmission/Transaxle:  5A-75

DTC Detecting Condition and Trouble Area

DTC Confirmation Procedure

1) Connect scan tool to DLC with ignition switch turned OFF.
2) Turn ON ignition switch and clear DTC by using scan tool.
3) Start engine and run it for 1 min. or more.
4) Check DTC and pending DTC.

DTC Detecting Condition

Trouble Area

Transmission error that is inconsistent between transmission 
data and transmission monitor (CAN bus monitor) data is 
detected more than 7 times continuously.
(1 driving cycle detection logic)

• ECM
• TCM
• Combination meter
• BCM
• ABS  or  ESP

® control module

• 4WD control module 
• Keyless start control module (if equipped)
• Steering angle sensor (ESP

® model)

• CAN communication line circuit