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
.)
• 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-
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.
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
.
When a malfunction symptom is reproduced, the question sheet is effective. Refer to
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
< BASIC INSPECTION >
[CVT: RE0F08B]
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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
.
When a malfunction symptom is reproduced, the question sheet is effective. Refer to
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
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
< BASIC INSPECTION >
[CVT: RE0F08B]
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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
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
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
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