Suzuki Grand Vitara JB416 / JB420 / JB419. Service manual - part 323

5A-83 Automatic Transmission/Transaxle: 

Reference Waveform No. 1
Pressure control solenoid valve signal at engine idling.

Reference Waveform No. 2
TCC pressure control solenoid valve signal at engine 
idling.

Reference Waveform No. 3
CAN communication line (High & Low) signal at engine 
idling.

Reference Waveform No. 4
Output shaft speed sensor signal at vehicle speed 40 
km/h (25 mile/h).

Measurement 
terminal

CH1: “E92-4” to “E92-1”

Oscilloscope 
setting

CH1: 5 V/DIV
TIME: 20 ms/DIV

Measurement 
condition

• After warmed up to normal 

operating temperature

• Engine at specified idle speed 

with “P” range.

Measurement 
terminal

CH1: “E92-5” to “E92-1”

Oscilloscope 
setting

CH1: 5 V/DIV
Time: 2 ms/DIV

Measurement 
condition

• After warmed up to normal 

operating temperature

• Engine at specified idle speed 

with “P” range

I3RM0B510029-01

I4RS0A510024-01

Measurement 
terminal

CH1: “E92-7” to “E92-1”
CH2: “E92-17” to “E92-1”

Oscilloscope 
setting

CH1: 1 V/DIV
TIME: 100 

µs/DIV

Measurement 
condition

• After warmed up to normal 

operating temperature

• Engine at specified idle speed 

with “P” range.

Measurement 
terminal

CH1: “E93-5” to “E92-1”

Oscilloscope 
setting

CH1: 5 V/DIV
TIME: 2 ms/DIV

Measurement 
condition

• After warmed up to normal 

operating temperature

• Drive vehicle at 40 km/h (25 

mile/h).

I3RM0B510030-01

I5JB0A510046-02

Automatic Transmission/Transaxle:  5A-84

Reference Waveform No. 5
Input shaft speed sensor signal at engine speed 3000 
rpm.

TCM Power and Ground Circuit Check

S6JB0A5104050

Wiring Diagram

Measurement 
terminal

CH1: “E93-6” to “E92-1”

Oscilloscope 
setting

CH1: 2 V/DIV
TIME: 10 ms/DIV

Measurement 
condition

• After warmed up to normal 

operating temperature

• Engine at 3,000 rpm with “P” 

range.

I5JB0A510047-02

BLK

BLK

BLK

E92-1

E92-23

E92-6

BLK/WHT

BLK/WHT

WHT/GRN

E92-24

WHT

1

2

3

4

7

6

5

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

8

I5JB0A510152-01

1. TCM

5. Ignition switch

2. A/T relay

6. “IG COIL” fuse

3. “AT” fuse

7. Power integration No.2 in main fuse box

4. “DOME” fuse

8. Terminal arrangement of TCM connector (viewed from harness side)

5A-85 Automatic Transmission/Transaxle: 

Troubleshooting

Step

Action

Yes

No

1

Check TCM back-up power circuit
1) Disconnect TCM connector with ignition switch OFF.
2) Check for proper connection to TCM at “E92-24” 

terminal.

3) If OK, check voltage at terminal “E92-24” of 

disconnected TCM connector.

Is it 10 – 14 V?

Go to Step 2.

“WHT” circuit open or 
shorted to ground.

2

Check TCM power circuit
1) Disconnect TCM connector with ignition switch OFF.
2) Check for proper connection to TCM at “E92-6” terminal.
3) If OK, turn ignition switch ON and check voltage at 

terminal “E92-6” of disconnected TCM connector.

Is it 10 – 14 V?

Go to Step 4.

Go to Step 3.

3

Check A/T relay operation
1) Check A/T relay operation referring to “A/T Relay 

Inspection”.

Is check result satisfactory?

“BLK/WHT”, “WHT/
GRN”, or “BLK” circuit 
for power supply open.

Replace A/T relay 
included in power 
integration No.2 in main 
fuse box.

4

Check TCM ground circuit
1) Turn ignition switch OFF.
2) With TCM connectors disconnected, check for proper 

connection to TCM at “E92-1” / “E92-23” terminal.

3) If OK, check resistance between “E92-1” / “E92-23” 

terminal of disconnected TCM connector and body 
ground.

Is continuity indicated?

TCM power and ground 
circuits are in good 
condition.

“BLK” circuit for TCM 
ground open.

Automatic Transmission/Transaxle:  5A-86

Repair Instructions

A/T Fluid Level Check

S6JB0A5106001

At Normal Operating Temperature

1) Drive vehicle so that A/T fluid temperature reach the 

normal operating temperature (70 – 80 

°C (158 – 

176 

°F)).

2) Stop vehicle with engine running and place it level.
3) With select lever at “P” range, apply parking brake 

and place chocks against wheels.

4) Keep engine idling and shift selector slowly to “L” 

and back to “P” range.

5) With engine idling, pull out dipstick (1), wipe it off 

with a clean cloth and put it back into place.

6) Pull out dipstick (1) again and check fluid level 

indicated on it. Fluid level should be between FULL 
HOT and LOW HOT. If it is below LOW HOT, add 
specified A/T fluid up to FULL HOT.

A/T fluid specification
SUZUKI ATF 3317 or Mobil ATF 3309

NOTE

• DO NOT RACE ENGINE while checking 

fluid level, even after engine is started.

• DO NOT OVERFILL. Overfilling can causes 

foaming and loss of fluid through breather. 
Then slippage and transmission failure can 
result.

• If vehicle was driven under high load such 

as pulling a trailer, fluid level should be 
checked about half an hour after it is 
stopped.

• When checking oil level, oil level gauge 

must be used in proper direction. Insert oil 
level gauge so that its front or back face is 
directed to the front of vehicle. When oil 
level indicated on front face of oil level 
gauge differs from that on back face, use 
lower one.

 

At Room Temperature
The fluid level check at room temperature performed 
after repair or fluid change before test driving is just 
preparation for level check of normal operating 
temperature. The checking procedure itself is the same 
as that described in “At Normal Operating Temperature” 
under “A/T Fluid Level Check”. If the fluid level is 
between FULL COLD and LOW COLD, proceed to test 
drive. And when the fluid temperature has reached the 
normal operating temperature, check fluid level again 
and adjust it as necessary.

2. “FULL HOT”

4. “FULL COLD”

3. “LOW HOT”

5. “LOW COLD”

1. Dipstick

3. “LOW COLD”

2. “FULL COLD”

I5JB0A510028-02

I5JB0A510029-02