Infiniti G37 Coupe. Manual - part 1342

 

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Infiniti G37 Coupe. Manual - part 1342

 

 

LINE PRESSURE TEST

TM-221

< ON-VEHICLE MAINTENANCE >

[5AT: RE5R05A]

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Judgment Possible 

cause

Idle speed

Low for all positions
(“P”, “R”, “N”, “D”, “M”)

Possible causes include malfunctions in the pressure supply system and low oil pump output.
For example
• Oil  pump  wear
• Pressure regulator valve or plug sticking or spring fatigue
• Oil  strainer 

 oil pump 

 pressure regulator valve passage oil leak

• Engine idle speed too low

Only low for a specific 
position

Possible causes include an oil pressure leak in a passage or device related to the position 
after the pressure is distributed by the manual valve.

High

Possible causes include a sensor malfunction or malfunction in the line pressure adjustment 
function.
For example
• Accelerator pedal position signal malfunction
• A/T fluid temperature sensor malfunction
• Line pressure solenoid malfunction (sticking in OFF state, filter clog, cut line)
• Pressure regulator valve or plug sticking

Stall speed

Oil pressure does not 
rise higher than the oil 
pressure for idle.

Possible causes include a sensor malfunction or malfunction in the pressure adjustment func-
tion.
For example
• Accelerator pedal position signal malfunction
• TCM breakdown
• Line pressure solenoid malfunction (shorting, sticking in ON state)
• Pressure regulator valve or plug sticking
• Pilot valve sticking or pilot filter clogged

The pressure rises, but 
does not enter the stan-
dard position.

Possible causes include malfunctions in the pressure supply system and malfunction in the 
pressure adjustment function.
For example
• Accelerator pedal position signal malfunction
• Line pressure solenoid malfunction (sticking, filter clog)
• Pressure regulator valve or plug sticking
• Pilot valve sticking or pilot filter clogged

Only low for a specific 
position

Possible causes include an oil pressure leak in a passage or device related to the position 
after the pressure is distributed by the manual valve.

TM-222

< ON-VEHICLE MAINTENANCE >

[5AT: RE5R05A]

ROAD TEST

ROAD TEST

Description

INFOID:0000000001672238

• The road test inspects overall performance of the A/T and analyzes possible malfunction causes.
• The road test is performed out in the following three stages.
1.

TM-222, "Check Before Engine Is Started"

2.

TM-222, "Check at Idle"

.

3.

Cruise test

TM-223, "Cruise Test - Part 1"

TM-224, "Cruise Test - Part 2"

TM-224, "Cruise Test - Part 3"

CAUTION:

Always drive vehicle at a safe speed.

• Check the test procedure and inspection items before beginning the road test.
• Test all inspection items until the symptom is uncovered. Diagnose NG items when all road tests are com-

plete.

Check Before Engine Is Started

INFOID:0000000001672239

1.

CHECK A/T CHECK INDICATOR LAMP

1.

Park vehicle on level surface.

2.

Shift the selector lever to “P” position.

3.

Turn ignition switch OFF and wait at least 10 seconds.

4.

Turn ignition switch ON. (Do not start engine.)

Does A/T CHECK indicator lamp light up for about 2 seconds?

YES

>> Go to 

TM-222, "Check at Idle"

.

NO

>> Stop the road test and go to 

TM-188, "Symptom Table"

Check at Idle

INFOID:0000000001672240

1.

CHECK STARTING THE ENGINE

1.

Park vehicle on level surface.

2.

Shift the selector lever to “P” or “N” position.

3.

Turn ignition switch OFF.

4.

Start the engine.

Does the engine start?

YES

>> GO TO 2.

NO

>> Stop the road test and go to 

TM-188, "Symptom Table"

.

2.

CHECK STARTING THE ENGINE

1.

Turn ignition switch ON. (Do not start engine.)

2.

Shift the selector lever to “D”, “M” or “R” position.

3.

Start the engine.

Does the engine start in any positions?

YES

>> Stop the road test and go to 

TM-188, "Symptom Table"

.

NO

>> GO TO 3.

3.

CHECK “P” POSITION FUNCTIONS

1.

Shift the selector lever to “P” position.

2.

Turn ignition switch OFF.

3.

Release the parking brake.

4.

Push the vehicle forward or backward.

5.

Engage the parking brake.

When you push the vehicle while disengaging the parking brake, does it move?

YES

>> Record the malfunction, GO TO 4.

NO

>> GO TO 4. 

ROAD TEST

TM-223

< ON-VEHICLE MAINTENANCE >

[5AT: RE5R05A]

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4.

CHECK “N” POSITION FUNCTIONS

1.

Start the engine.

2.

Shift the selector lever to “N” position.

3.

Release the parking brake.

Does vehicle move forward or backward?

YES

>> Record the malfunction, GO TO 5.

NO

>> GO TO 5.

5.

CHECK SHIFT SHOCK

1.

Engage the brake.

2.

Shift the selector lever to “D” position.

When the A/T is shifted from “N” to “D”, is there an excessive shock?

YES

>> Record the malfunction, GO TO 6.

NO

>> GO TO 6.

6.

CHECK “R” POSITION FUNCTIONS

1.

Shift the selector lever to “R” position.

2.

Release the brake for 4 to 5 seconds.

Does the vehicle creep backward?

YES

>> GO TO 7.

NO

>> Record the malfunction, GO TO 7.

7.

CHECK “D” POSITION FUNCTIONS 

Inspect whether the vehicle creeps forward when the A/T is put into the “D” position.

Does the vehicle creep forward in the “D” position?

YES

>> Go to 

TM-223, "Cruise Test - Part 1"

.

NO

>> Record the malfunction and go to 

TM-223, "Cruise Test - Part 1"

.

Cruise Test - Part 1

INFOID:0000000001672241

1.

CHECK STARTING OUT FROM D

1

1.

Drive the vehicle for about 10 minutes to warm up the engine oil and ATF.
Appropriate temperature for the ATF: 50 to 80

°

C (122 to 176

°

F)

2.

Park the vehicle on a level surface.

3.

Shift the selector lever to “D” position.

4.

Press the accelerator pedal about half-way down to accelerate the vehicle.

 With CONSULT-III

Read the value of “GEAR” with “DATA MONITOR” mode.
Starts from D

1

?

YES

>> GO TO 2.

NO

>> Record the malfunction, GO TO 2.

2.

CHECK SHIFT-UP

Depress the accelerator pedal about half-way and inspect if the vehicle shifts up (D

1

 D

2

 D

3

 D

4

 D

5

) at

the appropriate speed. Refer to 

TM-329, "Vehicle Speed at Which Gear Shifting Occurs"

.

 With CONSULT-III

Read the value of “GEAR”, “ACCELE POSI” and “VEHCLE SPEED” with “DATA MONITOR” mode.
Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Record the malfunction, GO TO 3.

3.

CHECK LOCK-UP 

When releasing accelerator pedal (closed throttle position signal OFF) from D

5

, check lock-up from D

5

 to L/U.

Refer to 

TM-329, "Vehicle Speed at Which Lock-up Occurs/Releases"

.

 With CONSULT-III

Select “TCC SOLENOID” with “DATA MONITOR” mode. Refer to 

TM-177, "Reference Value"

TM-224

< ON-VEHICLE MAINTENANCE >

[5AT: RE5R05A]

ROAD TEST

Does it lock-up?

YES

>> GO TO 4.

NO

>> Record the malfunction, GO TO 4.

4.

CHECK LOCK-UP HOLD

Check hold lock-up.

 With CONSULT-III

Select “TCC SOLENOID” with “DATA MONITOR” mode. Refer to 

TM-177, "Reference Value"

.

Does it maintain lock-up status?

YES

>> GO TO 5.

NO

>> Record the malfunction, GO TO 5.

5.

CHECK LOCK-UP RELEASE

Check lock-up cancellation by depressing brake pedal lightly to decelerate.

 With CONSULT-III

Select “TCC SOLENOID” with “DATA MONITOR” mode. Refer to 

TM-177, "Reference Value"

.

Does lock-up cancel?

YES

>> GO TO 6.

NO

>> Record the malfunction, GO TO 6.

6.

CHECK SHIFT-DOWN D

5

 D

4

Decelerate by pressing lightly on the brake pedal.

 With CONSULT-III

Read the value of “GEAR” and “ENGINE SPEED” with “DATA MONITOR” mode.

When the A/T shift-down D

5

 D

4

, does the engine speed drop smoothly back to idle?

YES

>> 1.

Stop the vehicle.

2.

Go to 

TM-224, "Cruise Test - Part 2"

.

NO

>> Record the malfunction and go to 

TM-224, "Cruise Test - Part 2"

.

Cruise Test - Part 2

INFOID:0000000001672242

1.

CHECK SHIFT-UP

Depress the accelerator pedal down all the way and inspect whether or not the A/T shifts up (D

1

 D

2

 D

3

) at

the correct speed. Refer to 

TM-329, "Vehicle Speed at Which Gear Shifting Occurs"

.

 With CONSULT-III

Read the value of “GEAR”, “ACCELE POSI” and “VEHCLE SPEED” with “DATA MONITOR” mode.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Record the malfunction, GO TO 2.

2.

CHECK SHIFT-UP D

3

 D

4

 AND ENGINE BRAKE

When the A/T changes speed D

3

 D

4

, release the accelerator pedal.

 With CONSULT-III

Read the value of “GEAR” with “DATA MONITOR” mode.
Does the A/T shift-up D

3

 D

4

 and apply the engine brake?

YES

>> 1.

Stop the vehicle.

2.

Go to 

TM-224, "Cruise Test - Part 3"

.

NO

>> Record the malfunction and go to 

TM-224, "Cruise Test - Part 3"

.

Cruise Test - Part 3

INFOID:0000000001672243

1.

MANUAL MODE FUNCTION

Shift the selector lever to manual mode from “D” position.

Does it switch to manual mode?

YES

>> GO TO 2.

 

 

 

 

 

 

 

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