display NISSAN VERSA 2006 Workshop Service Repair Manual

CVT-34
TROUBLE DIAGNOSIS
Revision: June 20062007 Versa
TROUBLE DIAGNOSISPFP:00004
DTC Inspection Priority ChartUCS005Y5
If some DTCs are displayed at the same time, perform inspections one by one based on the following priority
chart.
NOTE:
If DTC “U1000 CAN COMM CIRCUIT” is displayed with other DTCs, first perform the trouble diagnosis
for “DTC U1000 CAN COMMUNICATION LINE”. Refer to CVT-68
.
Fail-safeUCS005Y6
The TCM has an electrical fail-safe mode. This mode makes it possible to operate even if there is an error in a
main electronic control input/output signal circuit.
FAIL -S AFE F UN CTI ON
If any malfunction occurs in a sensor or solenoid, this function controls the CVT to make driving possible.
Output Speed Sensor (Secondary Speed Sensor)
The shift pattern is changed in accordance with throttle position when an unexpected signal is sent from the
output speed sensor (secondary speed sensor) to the TCM. The overdrive-off mode is inhibited, and the tran-
saxle is put in “D”.
Input Speed Sensor (Primary Speed Sensor)
The shift pattern is changed in accordance with throttle position and secondary speed (vehicle speed) when
an unexpected signal is sent from the input speed sensor (primary speed sensor) to the TCM. The sport mode
is inhibited, and the transaxle is put in “D”.
PNP Switch
If an unexpected signal is sent from the PNP switch to the TCM, the transaxle is put in “D”.
CVT Fluid Temperature Sensor
If an unexpected signal is sent from the CVT fluid temperature sensor to the TCM, the gear ratio in use before
receiving the unexpected signal is maintained or the gear ratio is controlled to keep engine speed under 3500
rpm.
Transmission Fluid Pressure Sensor A (Secondary Pressure Sensor)

If an unexpected signal is sent from the transmission fluid pressure sensor A (secondary pressure sensor)
to the TCM, the secondary pressure feedback control is stopped and the offset value obtained before the
non-standard condition occurs is used to control line pressure.

If transmission fluid pressure sensor A (secondary pressure sensor) error signal is input to TCM, second-
ary pressure feedback control stops, but line pressure is controlled normally.
Pressure Control Solenoid A (Line Pressure Solenoid)
If an unexpected signal is sent from the solenoid to the TCM, the pressure control solenoid A (line pressure
solenoid) is turned OFF to achieve the maximum fluid pressure.
Pressure Control Solenoid B (Secondary Pressure Solenoid)
If an unexpected signal is sent from the solenoid to the TCM, the pressure control solenoid B (secondary pres-
sure solenoid) is turned OFF to achieve the maximum fluid pressure.
Torque Converter Clutch Solenoid
If an unexpected signal is sent from the solenoid to the TCM, the torque converter clutch solenoid is turned
OFF to cancel the lock-up.
Step Motor
If an unexpected signal is sent from the step motor to the TCM, the step motor coil phases “A” through “D” are
all turned OFF to hold the gear ratio used right before the non-standard condition occurred.
Priority Detected items (DTC)
1 U1000 CAN communication line
2 Except above

TROUBLE DIAGNOSIS
CVT-47
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CVT
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Before road test, familiarize yourself with all test procedures and
items to check.

Perform tests on all items until specified symptom is found.
Troubleshoot items which check out No Good after road test.
CONSULT-II OPERATION PROCEDURE
CAUTION:
If CONSULT-II is used with no connection of CONSULT-II CONVERTER, malfunctions might be
detected in self-diagnosis depending on control unit which performs CAN communication.

Using CONSULT-II, perform a cruise test and record the result.

Print the result and ensure that shifts and lock-ups take place as per Shift Schedule.
1. Touch “DATA MONITOR” on “SELECT DIAG MODE” screen.
2. Touch “MAIN SIGNALS” to set recording condition.
3. See “Numerical Display”, “Barchart Display” or “Line Graph Dis-
play”.
4. Touch “START”.
5. When performing cruise test. Refer to CVT-50, "
Cruise Test" .
6. After finishing cruise test part, touch “RECORD”.
SAT4 9 6G
BCIA0031E
SCIA5493E
SCIA4584E

CVT-48
TROUBLE DIAGNOSIS
Revision: June 20062007 Versa
7. Touch “STORE”.
8. Touch “BACK”.
9. Touch “DISPLAY”.
10. Touch “PRINT”.
11. Check the monitor data printed out.
SCIA4492E
SCIA4493E
SCIA4492E
SCIA4494E

TROUBLE DIAGNOSIS
CVT-57
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CONSULT-II Function (TRANSMISSION)UCS005YI
CONSULT-II can display each diagnostic item using the diagnostic test modes shown below.
FUNCTION
CONSULT-II REFERENCE VALUE
Diagnostic test mode Function Reference page
Work supportThis mode enables a technician to adjust some devices faster and more accurately by
following the indications on CONSULT-II.CVT-59
Self-diagnostic results Self-diagnostic results can be read and erased quickly.CVT-60
Data monitor Input/Output data in the TCM can be read.CVT-64
CAN diagnostic support
monitorThe results of transmit/receive diagnosis of CAN communication can be read.CVT-66
CALIB data Characteristic information for TCM and CVT assembly can be read. —
Function testPerformed by CONSULT-II instead of a technician to determine whether each system
is “OK” or “NG”.—
ECU part number TCM part number can be read. —
Item name Condition Display value (Approx.)
VSP SENSOR
During drivingApproximately matches the speedometer
reading.
ESTM VSP SIG*
PRI SPEED SEN During driving (lock-up ON) Approximately matches the engine speed.
ENG SPEED SIG Engine running Closely matches the tachometer reading.
SEC HYDR SEN “N” position idle 1.0 V
PRI HYDR SEN “N” position idle 0.7 V
AT F T E M P S E NWhen CVT fluid temperature is 20°C (68°F). 2.0 V
When CVT fluid temperature is 80°C (176°F). 1.0 V
VIGN SEN Ignition switch: ON Battery voltage
VEHICLE SPEED During drivingApproximately matches the speedometer
reading.
PRI SPEED During driving (lock-up ON) Approximately matches the engine speed.
SEC SPEED During driving50 X Approximately matches the speed-
ometer reading.
ENG SPEED Engine running Closely matches the tachometer reading.
GEAR RATIO During driving 2.56 - 0.43
ACC PEDAL OPENReleased accelerator pedal - Fully depressed
accelerator pedal0.0/8 - 8.0/8
SEC PRESS “N” position idle 0.8 MPa
PRI PRESS “N” position idle 0.4 MPa
STM STEP During driving−20 step - 180 step
ISOLT1Lock-up OFF 0.0 A
Lock-up ON 0.7 A
ISOLT2Release your foot from the accelerator pedal. 0.8 A
Press the accelerator pedal all the way down. 0.0 A
ISOLT3Secondary pressure low - Secondary pressure
high.0.8 - 0.0 A
SOLMON1Lock-up OFF 0.0 A
Lock-up ON 0.7 A
SOLMON2“N” position idle 0.8 A
When stalled 0.3 - 0.6 A

CVT-58
TROUBLE DIAGNOSIS
Revision: June 20062007 Versa
SOLMON3“N” position idle 0.6 - 0.7 A
When stalled 0.4 - 0.6 A
INH SW3MSelector lever in “D” and “L” positions ON
Selector lever in “P”, “R” and “N” positions OFF
INH SW4Selector lever in “R” and “D” positions ON
Selector lever in “P”, “N” and “L” positions OFF
INH SW3Selector lever in “D” and “L” positions ON
Selector lever in “P”, “R” and “N” positions OFF
INH SW2Selector lever in “N”, “D” and “L” positions ON
Selector lever in “P” and “R” positions OFF
INH SW1Selector lever in “R”, “N” and “D” positions ON
Selector lever in “P” and “L” positions OFF
BRAKE SWDepressed brake pedal ON
Released brake pedal OFF
FULL SWFully depressed accelerator pedal ON
Released accelerator pedal OFF
IDLE SWReleased accelerator pedal ON
Fully depressed accelerator pedal OFF
SPORT MODE SWWhile pushing overdrive cancel switch ON
Other conditions OFF
INDDRNGSelector lever in “D” position ON
Selector lever in other positions OFF
INDLRNGSelector lever in “L” position ON
Selector lever in other positions OFF
INDNRNGSelector lever in “N” position ON
Selector lever in other positions OFF
INDRRNGSelector lever in “R” position ON
Selector lever in other positions OFF
INDPRNGSelector lever in “P” position ON
Selector lever in other positions OFF
SMCOIL D
During driving Changes ON ⇔ OFF. SMCOIL C
SMCOIL B
SMCOIL A
LUSEL SOL OUTSelector lever in “P” and “N” positions ON
Wait at least for 5 seconds with the selector
lever in “R”, “D” and “L” positionsOFF
STRTR RLY OUTSelector lever in “P” and “N” positions ON
Selector lever in other positions OFF
STRTR RLY MONSelector lever in “P” and “N” positions ON
Selector lever in other positions OFF
RANGESelector lever in “N” or “P” position. N·P
Selector lever in “R” position. R
Selector lever in “D” position. D
Selector lever in “L” position. L Item name Condition Display value (Approx.)

TROUBLE DIAGNOSIS
CVT-59
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*: Models without ABS does not indicate.
CONSULT-II SETTING PROCEDURE
Refer to GI-38, "CONSULT-II Start Procedure" .
WORK SUPPORT MODE
Display Item List
Engine Brake Adjustment
1. Touch “WORK SUPPORT” on “SELECT DIAG MODE” screen.
2. Touch “ENGINE BRAKE ADJ”.
3. Touch “START”.
4. Set “ENGINE BRAKE LEVEL” by touching “UP” or “DOWN”.
5. Turn ignition switch OFF, wait at least 5 seconds and then turn
ignition switch ON.
6. Engine brake level set is completed.
Item name Description
ENGINE BRAKE ADJ. The engine brake level setting can be canceled.
CONFORM CVTF DETERIORTN The CVT fluid deterioration level can be checked.
BCIA0031E
SCIA4287E
SCIA4288E
“ENGINE BRAKE LEVEL”
0: Initial set value (Engine brake level control is
activated)
OFF: Engine brake level control is deactivated.
SAT9 3 4J

TROUBLE DIAGNOSIS
CVT-61
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Revision: June 20062007 Versa
Operation Procedure
1. Touch “SELF-DIAG RESULTS” on “SELECT DIAG MODE”.
Display shows malfunction experienced since the last erasing
operation.
Display Items List
X: Applicable —: Not applicable
BCIA0031E
Items (CONSULT-
II screen terms)Malfunction is detected when...TCM self-
diagnosisOBD-II (DTC)
Reference
page “TRANS-
MISSION”
with CON-
SULT-IIMIL indicator
lamp*1,
“ENGINE” with
CONSULT-II or
GST
CAN COMM CIR-
CUITWhen TCM is not transmitting or receiving CAN communica-
tion signal for 2 seconds or moreU1000 U1000CVT-68
CONTROL
UNIT(CAN)When detecting error during the initial diagnosis of CAN con-
troller of TCMU1010 U1010CVT-71
STARTER RELAY/
CIRCIf this signal is ON other than in “P” or “N” position, this is
judged to be a malfunction
(And if it is OFF in “P” or “N” position, this is judged to be a
malfunction too)P0615 —CVT-72
BRAKE SW/CIRC When the brake switch does not switch to ON or OFF P0703 —CVT-76
PNP SW/CIRC
PNP switch 1-4 signals input with impossible pattern

PNP switch 3 monitor terminal open or short circuitP0705 P0705CVT-78
AT F T E M P S E N /
CIRCDuring running, the CVT fluid temperature sensor signal volt-
age is excessively high or lowP0710 P0710CVT-85
INPUT SPD SEN/
CIRC
Input speed sensor (primary speed sensor) signal is not
input due to an open circuit

An unexpected signal is input when vehicle is being drivenP0715 P0715CVT-90
VEH SPD SEN/
CIR AT

Signal from vehicle speed sensor CVT [Output speed sen-
sor (Secondary speed sensor)] not input due to open or
short circuit

Unexpected signal input during runningP0720 P0720CVT-95
ENGINE SPEED
SIG
TCM does not receive the CAN communication signal
from the ECM

Engine speed is too low while drivingP0725 —CVT-101
BELT DAMG Unexpected gear ratio detected P0730 —CVT-103
TCC SOLENOID/
CIRCNormal voltage not applied to solenoid due to open or short
circuitP0740 P0740CVT-105
A/T TCC S/V
FNCTN

CVT cannot perform lock-up even if electrical circuit is
good

TCM detects as irregular by comparing difference value
with slip rotation

There is big difference engine speed and primary speed
when TCM lock-up signal is onP0744 P0744CVT-110

CVT-62
TROUBLE DIAGNOSIS
Revision: June 20062007 Versa
L/PRESS SOL/
CIRC

Normal voltage not applied to solenoid due to open or
short circuit

TCM detects as irregular by comparing target value with
monitor valueP0745 P0745CVT-113
PRS CNT SOL/A
FCTNUnexpected gear ratio was detected in the LOW side due to
excessively low line pressureP0746 P0746CVT-118
PRS CNT SOL/B
FCTNSecondary pressure is too high or too low compared with the
commanded value while drivingP0776 P0776CVT-121
PRS CNT SOL/B
CIRC

Normal voltage not applied to solenoid due to cut line,
short, or the like

TCM detects as irregular by comparing target value with
monitor valueP0778 P0778CVT-124
TR PRS SENS/A
CIRCSignal voltage of the transmission fluid pressure sensor A
(secondary pressure sensor) is too high or too low while driv-
ingP0840 P0840CVT-129
PRESS SEN/
FNCTNCorrelation between the values of the transmission fluid
pressure sensor A (secondary pressure sensor) and the
transmission fluid pressure sensor B (primary pressure sen-
sor) is out of specificationP0841 —CVT-134
TR PRS SENS/B
CIRCSignal voltage of the transmission fluid pressure sensor B
(primary pressure sensor) is too high or too low while drivingP0845 P0845CVT-137
SEC/PRESS
DOWNSecondary fluid pressure is too low compared with the com-
manded value while drivingP0868 —CVT-142
TCM-POWER
SUPPLY

When the power supply to the TCM is cut OFF, for exam-
ple because the battery is removed, and the self-diagnosis
memory function stops

This is not a malfunction message (Whenever shutting
OFF a power supply to the TCM, this message appears on
the screen)P1701 —CVT-145
TP SEN/CIRC A/TTCM does not receive the proper accelerator pedal position
signals (input by CAN communication) from ECMP1705 —CVT-150
ESTM VEH SPD
SIG*2

CAN communication with the ABS actuator and the elec-
tric unit (control unit) is malfunctioning

There is a great difference between the vehicle speed sig-
nal from the ABS actuator and the electric unit (control
unit), and the vehicle speed sensor signalP1722 —CVT-152
CVT SPD SEN/
FNCTNA rotation sensor error is detected because the gear does
not change in accordance with the position of the stepping
motor
CAUTION:
One of the “P0720 VEH SPD SEN/CIR AT”, the “P0715
INPUT SPD SEN/CIRC” or the “P0725 ENGINE SPEED
SIG“ is displayed with the DTC at the same timeP1723 —CVT-154
ELEC TH CON-
TROLThe electronically controlled throttle for ECM is malfunction-
ingP1726 —CVT-156
LU-SLCT SOL/
CIRC

Normal voltage not applied to solenoid due to cut line,
short, or the like

TCM detects as irregular by comparing target value with
monitor valueP1740 P1740CVT-158
Items (CONSULT-
II screen terms)Malfunction is detected when...TCM self-
diagnosisOBD-II (DTC)
Reference
page “TRANS-
MISSION”
with CON-
SULT-IIMIL indicator
lamp*1,
“ENGINE” with
CONSULT-II or
GST

CVT-64
TROUBLE DIAGNOSIS
Revision: June 20062007 Versa
DATA MONITOR MODE
Operation Procedure
1. Touch “DATA MONITOR” on “SELECT DIAG MODE”.
NOTE:
When malfunction is detected, CONSULT-II performs
“REAL-TIME DIAGNOSIS”. Also, any malfunction detected
while in this mode will be displayed at real time.
Display Items List
X: Standard, —: Not applicable, : Option
BCIA0031E
Monitored item (Unit)Monitor item selection
Remarks ECU
INPUT
SIGNALSMAIN SIG-
NALSSELEC-
TION
FROM
MENU
VSP SENSOR (km/h) X — Output speed sensor (secondary speed sensor).
ESTM VSP SIG (km/h) X — Models without ABS does not indicate.
PRI SPEED SEN (rpm) X —
ENG SPEED SIG (rpm) X —
SEC HYDR SEN (V) X —
PRI HYDR SEN (V) X —
ATF TEMP SEN (V) X — CVT fluid temperature sensor
VIGN SEN (V) X —
VEHICLE SPEED (km/h) — X Vehicle speed recognized by the TCM.
PRI SPEED (rpm) — X Primary pulley speed.
SEC SPEED (rpm) — — Secondary pulley speed.
ENG SPEED (rpm) — X
SLIP REV (rpm) — XDifference between engine speed and primary
pulley speed
GEAR RATIO — X
G SPEED (G) — —
ACC PEDAL OPEN (0.0/8) X XDegree of opening for accelerator recognized by
the TCM
For fail-safe operation, the specific value used
for control is displayed.
TRQ RTO — —
SEC PRESS (MPa) — X
PRI PRESS (MPa) — X
ATF TEMP — X
DSR REV (rpm) — —
DGEAR RATIO — —

TROUBLE DIAGNOSIS
CVT-65
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DSTM STEP (step) — —
STM STEP (step) — X
LU PRS (MPa) — —
LINE PRS (MPa) — —
TGT SEC PRESS (MPa) — —
ISOLT1 (A) — XTorque converter clutch solenoid valve output
current
ISOLT2 (A) — XPressure control solenoid valve A (line pressure
solenoid valve) output current
ISOLT3 (A) — XPressure control solenoid valve B (secondary
pressure solenoid valve) output current
SOLMON1 (A) X XTorque converter clutch solenoid valve monitor
current
SOLMON2 (A) X XPressure control solenoid valve A (line pressure
solenoid valve) monitor current
SOLMON3 (A) X XPressure control solenoid valve B (secondary
pressure solenoid valve) monitor current
INH SW3M (ON/OFF) X — PNP switch 3 ON-OFF status monitor
INH SW4 (ON/OFF) X — PNP switch 4 ON-OFF status
INH SW3 (ON/OFF) X — PNP switch 3 ON-OFF status
INH SW2 (ON/OFF) X — PNP switch 2 ON-OFF status
INH SW1 (ON/OFF) X — PNP switch 1 ON-OFF status
BRAKE SW (ON/OFF) X XStop lamp switch (Signal input with CAN comuni-
cation)
FULL SW (ON/OFF) X X
Signal input with CAN communications
IDLE SW (ON/OFF) X X
SPORT MODE SW (ON/OFF) X XOverdrive control switch (Signal input with CAN
comunication)
STRDWNSW (ON/OFF) X —
Not mounted but displayed. STRUPSW (ON/OFF) X —
DOWNLVR (ON/OFF) X —
UPLVR (ON/OFF) X —
NONMMODE (ON/OFF) X —
MMODE (ON/OFF) X —
INDLRNG (ON/OFF) — — “L” position indicator output
INDDRNG (ON/OFF) — — “D” position indicator output
INDNRNG (ON/OFF) — — “N” position indicator output
INDRRNG (ON/OFF) — — “R” position indicator output
INDPRNG (ON/OFF) — — “P” position indicator outputMonitored item (Unit)Monitor item selection
Remarks ECU
INPUT
SIGNALSMAIN SIG-
NALSSELEC-
TION
FROM
MENU