Suzuki Grand Vitara JB416 / JB420 / JB419. Service manual - part 322

5A-79 Automatic Transmission/Transaxle: 

DTC P2764: Torque Converter Clutch (TCC) Circuit Low

S6JB0A5104048

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.

DTC Troubleshooting

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

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 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 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, 
TCC Pressure Control Solenoid and Pressure Control 
Solenoid 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, 
TCC Pressure Control 
Solenoid and Pressure 
Control Solenoid 
Removal and 
Installation”.

Automatic Transmission/Transaxle:  5A-80

Inspection of TCM and Its Circuits

S6JB0A5104049

TCM and its circuits can be checked at TCM wiring connectors by measuring voltage, pulse signal and resistance.

CAUTION

!

 

TCM cannot be checked by itself, it is strictly prohibited to connect voltmeter or ohmmeter to TCM with 
connector disconnected from it.

 

1) Remove TCM (1) from vehicle referring to “Transmission Control Module (TCM) Removal and Installation”.
2) Connect TCM connectors (2) to TCM.
3) Check voltage and/or pulse signal at each terminal of connectors connected using voltmeter (3) and oscilloscope 

(4).

NOTE

• As each terminal voltage is affected by battery voltage, confirm that it is 11 V or more when ignition 

switch is ON.

• Voltage with asterisk (*) cannot be measured by voltmeter because it is pulse signal. Check it with 

oscilloscope if necessary.

 

Terminal arrangement of TCM coupler (Viewed from harness side)

3. Body ground

3

4

1

2

I4RS0A510021-02

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

17 16

26 25

15 14

6

5

3

4

2

13 12

23 22

24

11 10 9

21 20 19

8 7

18

1

E93

I5JB0A510151-01

5A-81 Automatic Transmission/Transaxle: 

Connector “E92”

Terminal Wire color

Circuit

Standard 

voltage

Condition

1

BLK/ORN Ground

0 – 1 V

Ignition switch ON

2

BRN/RED

Pressure control 
solenoid valve (–)

0.6 – 1.0 V Ignition switch ON

3

PPL/WHT

TCC pressure control 
solenoid valve (–)

0.6 – 1.0 V Ignition switch ON

4

YEL/RED

Pressure control 
solenoid valve (+)

*0 – 0.6 V

↑↓

10 – 14 V

(“Reference 

Waveform 

No. 1: ”)

Engine running at idling.
(Output signal is duty pulse. Duty ratio varies 
depending on throttle valve opening.)

5

GRN/YEL

TCC pressure control 
solenoid valve (+)

*0 – 0.6 V

↑↓

10 – 14 V

(“Reference 

Waveform 

No. 2: ”)

Engine running at idling.
(Output signal is duty pulse. Duty ratio varies 
depending on torque converter clutch operating 
condition.)

6

BLK/WHT Power source

10 – 14 V Ignition switch ON

7

WHT

CAN communication 
line (Low)

*2.5 – 3.6 V

↑↓

1.6 – 2.5 V

(“Reference 

Waveform 

No. 3: ”)

Engine running at idling with after warming up.
(CAN communication signal is pulse. Pulse signal 
frequency varies depending on engine condition.))

8

—

—

—

—

9

—

—

—

—

10

YEL/BLK

3 position switch (–)

0 – 1 V

Ignition switch ON

11

YEL/BLK

Transmission fluid 
temperature sensor (+)

2.9 – 3.1 V Ignition switch ON, fluid temperature is 20 

°C (68 °F)

0.3 – 0.5 V Ignition switch ON, fluid temperature is 100 

°C (212 °F)

12

ORN

Transmission fluid 
temperature sensor (–)

0 – 1 V

Ignition switch ON

13

—

—

—

—

14

—

—

—

—

15

GRN/RED

Shift solenoid valve-B 
(No.2)

9 – 14 V

Ignition switch ON, select lever in “P” range

16

GRN

Shift solenoid valve-A 
(No.1)

9 – 14 V

Ignition switch ON, select lever in “P” range

17

RED

CAN communication 
line (High)

*2.5 – 3.6 V

↑↓

1.6 – 2.5 V

(“Reference 

Waveform 

No. 3: ”)

Engine running at idling with after warming up.
(CAN communication signal is pulse. Pulse signal 
frequency varies depending on engine condition.)

18

—

—

—

—

19

—

—

—

—

20

YEL/RED 3 position switch (+)

2.4 – 4.3 V

Ignition switch ON, select lever in “P”, “R”, “N” or “D” 
range

0.8 – 2.4 V Ignition switch ON, select lever in “3”, “2” or “L” range

21

—

—

—

—

22

—

—

—

—

23

BLK

Ground

0 – 1 V

Ignition switch ON

24

WHT

Power source for back-
up

10 – 14 V Constantly

Automatic Transmission/Transaxle:  5A-82

Connector “E93”

Terminal Wire color

Circuit

Standard 

voltage

Condition

1

RED

Transmission range 
sensor (“R” range)

8 – 14 V

Ignition switch ON, selector lever at “R” range

0 – 1 V

Ignition switch ON, selector lever at other than “R” 
range

2

—

—

—

—

3

—

—

—

—

4

PNK/WHT

4L/N switch (if 
equipped)

8 – 14 V

Ignition switch ON, transfer position in 4H

0 – 1 V

Ignition switch OFF, transfer position in 4L and N

5

WHT

Output shaft speed 
sensor (+)

0 – 1 V

Ignition switch ON, engine stops

*(“Referenc

e Waveform 

No. 4: ”)

While engine running.
(Output signal is waveform. Waveform frequency varies 
depending on output shaft speed. (18 pulses are 
generated par 1 input shaft revolution.))

6

BLU

Input shaft speed 
sensor (+)

0 – 1 V

Ignition switch ON, engine stops.

*(“Referenc

e Waveform 

No. 5: ”)

While engine running.
(Output signal is waveform. Waveform frequency varies 
depending on output shaft speed. (24 pulses are 
generated par 1 input shaft revolution.))

7

GRN

Transmission range 
sensor (“D” range)

8 – 14 V

Ignition switch ON, selector lever at “D” range

0 – 1 V

Ignition switch ON, selector lever at other than “D” 
range

8

GRN/ORN

Transmission range 
sensor (“N” range)

8 – 14 V

Ignition switch ON, selector lever at “N” range

0 – 1 V

Ignition switch ON, selector lever at other than “N” 
range

9

—

—

—

—

10

—

—

—

—

11

—

—

—

—

12

—

—

—

—

13

—

—

—

—

14

ORN

Output shaft speed 
sensor (–)

2 – 3 V

Ignition switch ON, engine at stop

15

—

—

—

—

16

PNK

Input shaft speed 
sensor (–)

2 – 3 V

Ignition switch ON, engine at stop

17

—

—

—

—

18

GRN/WHT

Transmission range 
sensor (“L” range)

8 – 14 V

Ignition switch ON, selector lever at “L” range

0 – 1 V

Ignition switch ON, selector lever at other than “L” 
range

19

GRN/ORN

Transmission range 
sensor (“2” range)

8 – 14 V

Ignition switch ON, selector lever at “2” range

0 – 1 V

Ignition switch ON, selector lever at other than “2” 
range

20

PNK

Transmission range 
sensor (“P” range)

8 – 14 V

Ignition switch ON, selector lever at “P” range

0 – 1 V

Ignition switch ON, selector lever at other than “P” 
range

21

—

—

—

—

22

—

—

—

—

23

PPL/WHT Data link connector

8 – 14 V

Ignition switch ON

24

—

—

—

—

25

—

—

—

—

26

—

—

—

—