Nissan Cube. Manual - part 952

TM-64

< BASIC INSPECTION >

[CVT: RE0F08B]

DIAGNOSIS AND REPAIR WORK FLOW

BASIC INSPECTION

DIAGNOSIS AND REPAIR WORK FLOW

Work Flow

INFOID:0000000009948905

BEFORE STARTING TROUBLE DIAGNOSIS

• TCM receives signals from sensor, switch, and others to control gear shifting and lock-up with a solenoid.

Therefore, input and output signals during CVT activation must be correct and stable. In addition, valves
must be free from adhesion and solenoids must have no malfunctions for CVT system to operate normally.

• It is more difficult to diagnose intermittent malfunctions than continuous ones. These kinds of malfunctions

often occur due to poor electrical connections or improper wiring. If this is the case, it is necessary to check
the related circuit carefully and not to replace a normal part by mistake.

• When a visual check is not sufficient, connect CONSULT (or GST) and circuit tester according to

“DETAILED FLOW” and perform “ROAD TEST”. (Refer to 

TM-211, "Description"

.)

• For a complaint regarding drivability, always take time to talk with the customer before starting trouble diag-

noses. Helpful information, especially for diagnosing intermittent malfunctions, can be obtained from the
customer.

• Use the attached “Diagnostic Work Sheet” to specifically find out what malfunction occurs under what condi-

tions. (Refer to 

TM-65, "Diagnostic Work Sheet"

.)

• Starting with the inspection of basic items facilitates diagnoses of malfunctions in electrically controlled vehi-

cle drivability.

DETAILED FLOW

1.

OBTAIN INFORMATION ABOUT SYMPTOM

1.

Refer to 

TM-65, "Diagnostic Work Sheet"

 and interview the customer to obtain the malfunction information

(conditions and environment when the malfunction occurred) as much as possible when the customer
brings in the vehicle.

2.

Check the following:

-

Service history

-

Harnesses and connectors malfunction. Refer to 

GI-40, "Intermittent Incident"

.

>> GO TO 2.

2.

CHECK DTC

1.

Before checking the malfunction, check whether any DTC exists.

2.

If DTC exists, perform the following operations.

-

Record the DTC and freeze frame data. (Print out the data using CONSULT and affix them to the Work
Order Sheet.)

-

Erase DTCs.

-

Check the relationship between the cause that is clarified with DTC and the malfunction information
described by the customer. 

TM-188, "Symptom Table"

 is effective.

3.

Check the information of related service bulletins and others also.

Do malfunction information and DTC exist?

Malfunction information and DTC exist. >>GO TO 3.
Malfunction information exists, but not DTC. >>GO TO 4.
Malfunction information does not exist, but DTC does. >>GO TO 5.

3.

REPRODUCE MALFUNCTION SYMPTOM

Check any malfunction described by a customer, except those with DTC on the vehicle.
Also investigate whether the symptom is a fail-safe or normal operation. Refer to 

TM-184, "Fail-safe"

.

When a malfunction symptom is reproduced, the question sheet is effective. Refer to 

TM-65, "Diagnostic Work

Sheet"

.

Verify the relationship between the symptom and the conditions in which the malfunction described by the cus-
tomer occurs.

 

>> GO TO 5.

DIAGNOSIS AND REPAIR WORK FLOW

TM-65

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4.

REPRODUCE MALFUNCTION SYMPTOM

Check the malfunction described by the customer on the vehicle.
Also investigate whether the symptom is a fail-safe or normal operation. Refer to 

TM-184, "Fail-safe"

.

When a malfunction symptom is reproduced, the question sheet is effective. Refer to 

TM-65, "Diagnostic Work

Sheet"

.

Verify the relationship between the symptom and the conditions in which the malfunction described by the cus-
tomer occurs.

 

>> GO TO 6.

5.

PERFORM “DTC CONFIRMATION PROCEDURE”

Perform “DTC CONFIRMATION PROCEDURE” of the appropriate DTC to check if DTC is detected again.
Refer to 

TM-186, "DTC Inspection Priority Chart"

 when multiple DTCs are detected, and then determine the

order for performing the diagnosis.
NOTE:
If no DTC is detected, refer to the freeze frame data.

Is any DTC detected?

YES

>> GO TO 7.

NO

>> Check according to 

GI-40, "Intermittent Incident"

.

6.

IDENTIFY MALFUNCTIONING SYSTEM WITH “DIAGNOSIS CHART BY SYMPTOM”

Use 

TM-188, "Symptom Table"

 from the symptom inspection result in step 4. Then identify where to start per-

forming the diagnosis based on possible causes and symptoms.

>> GO TO 8.

7.

REPAIR OR REPLACE THE MALFUNCTIONING PARTS

Repair or replace the detected malfunctioning parts.
Reconnect parts or connector after repairing or replacing, and then erase DTC if necessary.

>> GO TO 8.

8.

FINAL CHECK

Perform “DTC CONFIRMATION PROCEDURE” again to make sure that the repair is correctly performed.
Check that malfunctions are not reproduced when obtaining the malfunction information from the customer,
referring to the symptom inspection result in step 3 or 4.
Is DTC or malfunction symptom reproduced?

YES-1 (DTC is reproduced)>>GO TO 5.
YES-2 (Malfunction symptom is reproduced)>>GO TO 6.
NO

>> Before delivering the vehicle to the customer, make sure that DTC is erased.

Diagnostic Work Sheet

INFOID:0000000009948906

DESCRIPTION

There are many operating conditions that may cause a malfunction
of the transaxle parts. By understanding those conditions properly, a
quick and exact diagnosis can be achieved.
In general, customers have their own criteria for a problem. There-
fore, it is important to understand the symptom and status well
enough by asking the customer about the concerns carefully. In
order to systemize all the information for the diagnosis, prepare the
question sheet referring to the question points.

WORKSHEET SAMPLE

SEF907L

TM-66

< BASIC INSPECTION >

[CVT: RE0F08B]

DIAGNOSIS AND REPAIR WORK FLOW

Question Sheet

Customer name       MR/MS

Registration 
number

Manuf. Date

VIN

Model & Year

In Service Date

Engine

Mileage

km / Mile

Symptoms

†

 Vehicle does not move     (

†

 Any position

†

 Particular position                                          )

†

 No up-shift

†

 No down-shift

†

 Lock-up malfunction

†

 Shift point too high

†

 Shift point too low

†

 Shift shock     (

†

 N 

→

 D

†

 N 

→

 R

†

 Lock-up

†

 R, D, L, Manual position)

†

 Slip     (

†

 N 

→

 D

†

 N 

→

 R

†

 Lock-up

†

 R, D, L, Manual position)

†

 Noise

†

 Vibration

†

 No pattern select

†

 Others

(                                                                                                                                                                     )

First occurrence

†

 Recently (Indicate approximate month and year)

Frequency

†

 All the time

†

 Under certain conditions

†

 Sometimes (           times a day)

Weather condi-
tions

†

 Not affected

Weather

†

 Fine

†

 Clouding

†

 Raining

†

 Snowing

†

 Other (                                        )

Temp.

†

 Hot

†

 Warm

†

 Cool

†

 Cold

†

 Temp. [Approx.       

°

C (       

°

F)]

Humidity

†

 High

†

 Middle

†

 Low

Transaxle conditions

†

 Cold

†

 During warm-up

†

 After warm-up

†

 Engine speed (                                         rpm)

Road conditions

†

 In town

†

 In suburbs

†

 Freeway

†

 Off road (Up / Down)

Driving conditions

†

 Not affected

†

 At starting

†

 While idling

†

 While engine racing

†

 At racing

†

 While cruis-

ing

†

 While accelerating

†

 While decelerating

†

 While turning (Right / Left)

†

 Vehicle speed [                          km/h (                   MPH)]

Other conditions

ADDITIONAL SERVICE WHEN REPLACING TCM

TM-67

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ADDITIONAL SERVICE WHEN REPLACING TCM

Description

INFOID:0000000009948907

When replacing the TCM, perform the following work.

LOADING AND STORING OF CALIBRATION DATA

• The TCM acquires calibration data (individual characteristic value) of each solenoid that is stored in the

ROM assembly (in the control valve). This enables the TCM to perform accurate control. After the TCM is
replaced, check that the calibration data is correctly loaded and stored.

CAUTION:

When replacing TCM and transaxle assembly as a set, replace transaxle assembly first and then
replace TCM.
If the TCM is replaced in advance, perform “ADDITIONAL SERVICE WHEN REPLACING TRANSAXLE
ASSEMBLY”. Refer to 

TM-68, "Description"

.

Procedure

INFOID:0000000009948908

CAUTION:

Immediately after TCM is replaced or after transaxle assembly is replaced (after TCM initialization is
complete), self-diagnosis result of “P1701”, “P1709” may be displayed. In this case, erase self-diagno-
sis result using CONSULT. After erasing self-diagnosis result, perform DTC P1701, P1709 reproduction
procedure and check that malfunction is not detected. Refer to 

TM-144, "DTC Logic"

 (P1701), 

TM-148,

"DTC Logic"

 (P1709).

1.

LOAD CALIBRATION DATA

1.

Shift the selector lever to the “P” position.

2.

Turn ignition switch ON.

3.

Check that “P” is displayed on shift position indicator on combination meter.
NOTE:
Displayed approximately 1 – 2 seconds after the selector lever is moved to the “P” position.

Does the shift position indicator display “P”?

YES

>> GO TO 3.

NO

>> GO TO 2.

2.

DETECT MALFUNCTIONING ITEM

Check the following items:
• Harness between the TCM and the ROM assembly inside the transaxle assembly is open or shorted.
• Disconnected, loose, bent, collapsed, or otherwise abnormal connector housing terminals
Is the inspection result normal?

YES

>> GO TO 1.

NO

>> Repair or replace the malfunctioning parts.

3.

STORE CALIBRATION DATA

1.

Turn ignition switch OFF and wait for 5 seconds.

2.

Turn ignition switch ON.

Does the shift position indicator display “P” at the same time when turning ON the ignition switch?

YES

>> WORK END

NO

>> Check harness between battery and TCM harness connector terminal. Refer to 

TM-144, "Diagno-

sis Procedure"

.