Infiniti M35/M45 Y50. Manual - part 31

TROUBLE DIAGNOSIS

AT-47

WORK FLOW

A good understanding of the malfunction conditions can make troubleshooting faster and more accurate.
In general, each customer feels differently about a malfunction. It is important to fully understand the symp-
toms or conditions for a customer's complaint.
Make good use of the two sheets provided,

AT-48, "Information from Customer"

and

AT-48, "Diagnostic Work-

sheet Chart"

, to perform the best troubleshooting possible.

Work Flow Chart

*1.

*2.

*3.

*4.

*5.

*6.

*7.

*8.

*9.

*10.

*11.

*12.

*13.

*14.

*15.

*16.

*17.

(for VQ35DE engine),

(for VK45DE engine)

SCIA7037E

AT-48

TROUBLE DIAGNOSIS

DIAGNOSTIC WORKSHEET
Information from Customer

KEY POINTS

●

WHAT..... Vehicle and A/T model

●

WHEN..... Date, Frequencies

●

WHERE..... Road conditions

●

HOW..... Operating conditions, Symptoms

Diagnostic Worksheet Chart

Customer name

MR/MS

Model and Year

VIN

Trans. Model

Engine

Mileage

Malfunction Date

Manuf. Date

In Service Date

Frequency

❏

Continuous

❏

Intermittent (

times a day)

Symptoms

❏

Vehicle does not move.

(

❏

Any position

❏

Particular position)

❏

No up-shift

(

❏

1st

→

2nd

❏

2nd

→

3rd

❏

3rd

→

4th

❏

4th

→

5th)

❏

No down-shift

(

❏

5th

→

4th

❏

4th

→

3rd

❏

3rd

→

2nd

❏

2nd

→

1st)

❏

Lock-up malfunction

❏

Shift point too high or too low.

❏

Shift shock or slip

(

❏

→

❏

→

❏

Lock-up

❏

Any drive position)

❏

Noise or vibration

❏

No kick down

❏

No pattern select

❏

Others

(

)

A/T CHECK indicator lamp

❏

Continuously lit

❏

Not lit

Malfunction indicator lamp (MIL)

❏

Continuously lit

❏

Not lit

❏

Read the item on cautions concerning fail-safe and understand the customer's complaint.

AT-44

❏

A/T fluid inspection

AT-53

❏

Leak (Repair leak location.)

❏

State

❏

Amount

❏

Stall test and line pressure test

AT-53

AT-

❏

Stall test

❏

Torque converter one-way clutch

❏

Front brake

❏

High and low reverse clutch

❏

Low coast brake

❏

Forward brake

❏

Reverse brake

❏

Forward one-way clutch

❏

1st one-way clutch

❏

3rd one-way clutch

❏

Engine

❏

Line pressure low

❏

Except for input clutch and direct

clutch, clutches and brakes OK

❏

Line pressure inspection - Suspected part:

TROUBLE DIAGNOSIS

AT-49

❏

Perform all road tests and enter checks in required inspection items.

AT-57

4-1.

Check before engine is started

AT-57

❏

AT-190, "A/T CHECK Indicator Lamp Does Not Come On"

❏

Perform self-diagnostics. Enter checks for detected items.

AT-92

AT-103

❏

AT-105, "DTC U1000 CAN COMMUNICATION LINE"

❏

AT-108, "DTC P0615 START SIGNAL CIRCUIT"

❏

AT-112, "DTC P0700 TCM"

❏

AT-113, "DTC P0705 PARK/NEUTRAL POSITION SWITCH"

❏

AT-117, "DTC P0717 TURBINE REVOLUTION SENSOR"

❏

AT-119, "DTC P0720 VEHICLE SPEED SENSOR A/T (REVOLUTION SENSOR)"

❏

AT-124, "DTC P0725 ENGINE SPEED SIGNAL"

❏

AT-126, "DTC P0740 TORQUE CONVERTER CLUTCH SOLENOID VALVE"

❏

AT-128, "DTC P0744 A/T TCC S/V FUNCTION (LOCK-UP)"

❏

AT-130, "DTC P0745 LINE PRESSURE SOLENOID VALVE"

❏

AT-132, "DTC P1705 THROTTLE POSITION SENSOR"

❏

AT-135, "DTC P1710 A/T FLUID TEMPERATURE SENSOR CIRCUIT"

❏

AT-140, "DTC P1721 VEHICLE SPEED SENSOR MTR"

❏

AT-142, "DTC P1730 A/T INTERLOCK"

❏

AT-145, "DTC P1731 A/T 1ST ENGINE BRAKING"

❏

AT-147, "DTC P1752 INPUT CLUTCH SOLENOID VALVE"

❏

AT-149, "DTC P1754 INPUT CLUTCH SOLENOID VALVE FUNCTION"

❏

AT-151, "DTC P1757 FRONT BRAKE SOLENOID VALVE"

❏

AT-153, "DTC P1759 FRONT BRAKE SOLENOID VALVE FUNCTION"

❏

AT-155, "DTC P1762 DIRECT CLUTCH SOLENOID VALVE"

❏

AT-157, "DTC P1764 DIRECT CLUTCH SOLENOID VALVE FUNCTION"

❏

AT-159, "DTC P1767 HIGH AND LOW REVERSE CLUTCH SOLENOID VALVE"

❏

AT-161, "DTC P1769 HIGH AND LOW REVERSE CLUTCH SOLENOID VALVE

FUNCTION"

❏

AT-163, "DTC P1772 LOW COAST BRAKE SOLENOID VALVE"

❏

AT-165, "DTC P1774 LOW COAST BRAKE SOLENOID VALVE FUNCTION"

❏

AT-167, "DTC P1815 MANUAL MODE SWITCH"

❏

AT-172, "DTC P1841 ATF PRESSURE SWITCH 1"

❏

AT-174, "DTC P1843 ATF PRESSURE SWITCH 3"

❏

AT-176, "DTC P1845 ATF PRESSURE SWITCH 5"

❏

AT-178, "DTC P1846 ATF PRESSURE SWITCH 6"

4-2.

Check at Idle

AT-57

❏

AT-190, "Engine Cannot Be Started in “P” or “N” Position"

❏

AT-191, "In “P” Position, Vehicle Moves When Pushed"

❏

AT-192, "In “N” Position, Vehicle Moves"

❏

AT-193, "Large Shock (“N” to “D” Position)"

❏

AT-195, "Vehicle Does Not Creep Backward in “R” Position"

❏

AT-197, "Vehicle Does Not Creep Forward in “D” Position"

4-3.

Cruise Test

AT-59

Part 1

❏

AT-199, "Vehicle Cannot Be Started from D

❏

AT-201, "A/T Does Not Shift: D

→

❏

AT-203, "A/T Does Not Shift: D

→

❏

AT-205, "A/T Does Not Shift: D

→

❏

AT-207, "A/T Does Not Shift: D

→

❏

AT-209, "A/T Does Not Lock-up"

❏

AT-210, "A/T Does Not Hold Lock-up Condition"

❏

AT-212, "Lock-up Is Not Released"

❏

AT-212, "Engine Speed Does Not Return to Idle"

AT-50

TROUBLE DIAGNOSIS

4-3

Part 2

AT-61

❏

AT-199, "Vehicle Cannot Be Started from D

❏

AT-201, "A/T Does Not Shift: D

→

❏

AT-203, "A/T Does Not Shift: D

→

❏

AT-205, "A/T Does Not Shift: D

→

Part 3

AT-61

❏

AT-213, "Cannot Be Changed to Manual Mode"

❏

AT-214, "A/T Does Not Shift: 5th Gear

→

4th Gear"

❏

AT-215, "A/T Does Not Shift: 4th Gear

→

3rd Gear"

❏

AT-217, "A/T Does Not Shift: 3rd Gear

→

2nd Gear"

❏

AT-218, "A/T Does Not Shift: 2nd Gear

→

1st Gear"

❏

AT-220, "Vehicle Does Not Decelerate by Engine Brake"

❏

Perform self-diagnostics. Enter checks for detected items.

AT-92

AT-103

❏

AT-105, "DTC U1000 CAN COMMUNICATION LINE"

❏

AT-108, "DTC P0615 START SIGNAL CIRCUIT"

❏

AT-112, "DTC P0700 TCM"

❏

AT-113, "DTC P0705 PARK/NEUTRAL POSITION SWITCH"

❏

AT-117, "DTC P0717 TURBINE REVOLUTION SENSOR"

❏

AT-119, "DTC P0720 VEHICLE SPEED SENSOR A/T (REVOLUTION SENSOR)"

❏

AT-124, "DTC P0725 ENGINE SPEED SIGNAL"

❏

AT-126, "DTC P0740 TORQUE CONVERTER CLUTCH SOLENOID VALVE"

❏

AT-128, "DTC P0744 A/T TCC S/V FUNCTION (LOCK-UP)"

❏

AT-130, "DTC P0745 LINE PRESSURE SOLENOID VALVE"

❏

AT-132, "DTC P1705 THROTTLE POSITION SENSOR"

❏

AT-135, "DTC P1710 A/T FLUID TEMPERATURE SENSOR CIRCUIT"

❏

AT-140, "DTC P1721 VEHICLE SPEED SENSOR MTR"

❏

AT-142, "DTC P1730 A/T INTERLOCK"

❏

AT-145, "DTC P1731 A/T 1ST ENGINE BRAKING"

❏

AT-147, "DTC P1752 INPUT CLUTCH SOLENOID VALVE"

❏

AT-149, "DTC P1754 INPUT CLUTCH SOLENOID VALVE FUNCTION"

❏

AT-151, "DTC P1757 FRONT BRAKE SOLENOID VALVE"

❏

AT-153, "DTC P1759 FRONT BRAKE SOLENOID VALVE FUNCTION"

❏

AT-155, "DTC P1762 DIRECT CLUTCH SOLENOID VALVE"

❏

AT-157, "DTC P1764 DIRECT CLUTCH SOLENOID VALVE FUNCTION"

❏

AT-159, "DTC P1767 HIGH AND LOW REVERSE CLUTCH SOLENOID VALVE"

❏

AT-161, "DTC P1769 HIGH AND LOW REVERSE CLUTCH SOLENOID VALVE

FUNCTION"

❏

AT-163, "DTC P1772 LOW COAST BRAKE SOLENOID VALVE"

❏

AT-165, "DTC P1774 LOW COAST BRAKE SOLENOID VALVE FUNCTION"

❏

AT-167, "DTC P1815 MANUAL MODE SWITCH"

❏

AT-172, "DTC P1841 ATF PRESSURE SWITCH 1"

❏

AT-174, "DTC P1843 ATF PRESSURE SWITCH 3"

❏

AT-176, "DTC P1845 ATF PRESSURE SWITCH 5"

❏

AT-178, "DTC P1846 ATF PRESSURE SWITCH 6"

❏

Inspect each system for items found to be NG in the self-diagnostics and repair or replace the malfunctioning parts.

❏

Perform all road tests and enter the checks again for the required items.

AT-57

❏

For any remaining NG items, perform the “Diagnostics Procedure” and repair or replace the malfunctioning

parts. See the chart for diagnostics by symptoms. (This chart also contains other symptoms and inspection pro-
cedures.)

AT-64

❏

Erase the results of the self-diagnostics from the TCM.

AT-96

AT-

104

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