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AT-80
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS
*1: Refer to AT- 4 1 , "Malfunction Indicator Lamp (MIL)" .
*2: These malfunctions cannot be displayed MIL if another malfunction is assigned to MIL.
DATA MONITOR MODE
Display Items List
X: Standard, —: Not applicable, : Option
SHIFT SOLENOID A • TCM detects an improper voltage drop when it tries to operate the so-
lenoid valve. P0750
AT- 1 3 8
SHIFT SOLENOID B • TCM detects an improper voltage drop when it tries to operate the so-
lenoid valve. P0755
AT- 1 4 3
OVER CLUTCH SOLE-
NOID • TCM detects an improper voltage drop when it tries to operate the so-
lenoid valve. P1760
AT- 1 4 8
VHCL SPEED SEN-
MTR • TCM does not receive the proper voltage signal from the sensor.
—AT- 1 5 3
BATT/FLUID TEMP
SEN • TCM receives an excessively low or high voltage from the sensor.
—AT- 1 5 6
INPUT SPEED SEN-
SOR A • TCM does not receive proper voltage signal from sensor.
—AT- 1 6 2
CONTROL UNIT (RAM) • TCM memory (RAM) is malfunctioning. —AT- 1 6 7
CONTROL UNIT (ROM) • TCM memory (ROM) is malfunctioning. —AT- 1 6 7
No failure
(NO SELF DIAGNOS-
TIC FAILURE INDICAT-
ED FURTHER
TESTING MAY BE RE-
QUIRED) • No failure has been detected.
——
Items (CONSULT-III
screen terms) Malfunction is detected when... OBD-II (DTC)
Reference page
MIL indicator
lamp*1, “EN-
GINE” with
CONSULT-III or GST
Monitored item (Unit) Monitor Item Selection
Remarks
TCM INPUT
SIGNALS MAIN SIG-
NALS SELEC-
TION FROM MENU
VHCL/S SE-A/T (km/h) X— Output speed sensor
VHCL/S SE-MTR (km/h) X— Vehicle speed display may not be accu-
rate under approx. 10 km/h (6 mph). It
may not indicate 0 km/h (0 mph) when
vehicle is stationary.
THRTL POS SEN (V) X—
FLUID TEMP SE (V) X—
BATTERY VOLT (V) X—
ENGINE SPEED (rpm) XX
INPUT SPEED (rpm) X—
OVERDRIVE SW (ON/OFF) X—
PN POSI SW (ON/OFF) X—
R POSITION SW (ON/OFF) X—
D POSITION SW (ON/OFF) X—
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TROUBLE DIAGNOSISAT-81
< SERVICE INFORMATION >
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CAN DIAGNOSTIC SUPPORT MONITOR MODE
Refer to LAN-14, "CAN Diagnostic Support Monitor".
DTC & SRT CONFIRMATION
Display Items List
2 POSITION SW (ON/OFF) X—
1 POSITION SW (ON/OFF) X—
ASCD-CRUISE (ON/OFF) X—
Signal input with CAN communication.
ASCD-OD CUT (ON/OFF) X—
KICKDOWN SW (ON/OFF) X—
Not mounted but displayed.
POWERSHIFT SW (ON/OFF) X—
CLOSED THL/SW (ON/OFF) X—
Signal input with CAN communication.
W/O THRL/P-SW (ON/OFF) X—
*SHIFT S/V A (ON/OFF) ——
Displays status of check signal (reinput
signal) for TCM control signal output. Re-
mains unchanged when solenoid valves
are open or shorted.
*SHIFT S/V B (ON/OFF)
——
*OVRRUN/C S/V (ON/OFF) ——
HOLD SW (ON/OFF) X— Not mounted but displayed.
BRAKE SW (ON/OFF) X— Stop lamp switch (Signal input with CAN
communication)
GEAR —X Gear position recognized by the TCM up-
dated after gear-shifting
SLCT LVR POSI —X Selector lever position is recognized by
the TCM.
For fail-safe operation, the specific value
used for control is displayed.
VEHICLE SPEED (km/h) —X Vehicle speed reco gnized by the TCM.
THROTTLE POSI (0.0/8) —X Degree of opening for accelerator recog-
nized by the TCM
For fail-safe operation, the specific value
used for control is displayed.
LINE PRES DTY (%) —X
TCC S/V DUTY (%) —X
SHIFT S/V A (ON/OFF) —X
SHIFT S/V B (ON/OFF) —X
OVERRUN/C S/V (ON/OFF) —X
SELF-D DP LMP (ON/OFF) —X
TC SLIP RATIO (0.000) ——
TC SLIP SPEED (rpm) —— Difference between engine speed and
torque converter input shaft speed
Monitored item (Unit)
Monitor Item Selection
Remarks
TCM INPUT
SIGNALS MAIN SIG-
NALS SELEC-
TION FROM
MENU
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AT-82
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS
Diagnosis Procedure without CONSULT-III
INFOID:0000000005928106
TCM SELF-DIAGNOSTIC PROCEDURE
Description
If a malfunction occurs in electrical system, turning ignition switch ON will illuminate OD OFF indicator lamp for
2 seconds. To detect a malfunction, entering a self-diagnosis start signal retrieves information on malfunctions
from memory and indicates malfunction by blinking OD OFF indicator lamp.
Diagnostic Procedure
1.CHECK OD OFF INDICATOR LAMP
1. Park vehicle on flat surface.
2. Move selector lever to “P” position.
3. Turn ignition switch OFF. Wait at least 5 seconds.
DTC work support item Description Check item
1ST GR FNCTN P0731 Following items for “1GR incorrect ratio (P0731)” can be confirmed.
• Self-diagnosis status (whether the diagnosis is being performed
or not)
• Self-diagnostic results (OK or NG) • Shift solenoid valve A
• Shift solenoid valve B
• Each clutch
•Hydraulic co
ntrol circuit
2ND GR FNCTN P0732 Following items for “2GR incorrect ratio (P0732)” can be confirmed.
• Self-diagnosis status (whether the diagnosis is being performed
or not)
• Self-diagnostic results (OK or NG) • Shift solenoid valve B
• Each clutch
•Hydraulic co
ntrol circuit
3RD GR FNCTN P0733 Following items for “3GR incorrect ratio (P0733)” can be confirmed.
• Self-diagnosis status (whether the diagnosis is being performed
or not)
• Self-diagnostic results (OK or NG) • Shift solenoid valve A
• Each clutch
•Hydraulic co
ntrol circuit
4TH GR FNCTN P0734 Following items for “4GR incorrect ratio (P0734)” can be confirmed.
• Self-diagnosis status (whether the diagnosis is being performed
or not)
• Self-diagnostic results (OK or NG) • Shift solenoid valve A
• Shift solenoid valve B
• Overrun clutch solenoid valve
• Line pressure solenoid valve
• Each clutch
•Hydraulic co
ntrol circuit
TCC S/V FNCTN P0744 Following items for “Torque converter (P0744)” can be confirmed.
• Self-diagnosis status (whether the diagnosis is being performed
or not)
• Self-diagnostic results (OK or NG) • Torque converter clutch sole-
noid valve
• Each clutch
•Hydraulic co ntrol circuit
SCIA5472E
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TROUBLE DIAGNOSISAT-83
< SERVICE INFORMATION >
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4. Turn ignition switch ON. (Do not start engine.)
Does OD OFF indicator lamp come on about 2 seconds?
YES >> GO TO 2.
NO >> Stop procedure. Perform AT-180, "
OD OFF Indicator
Lamp Does Not Come On" before proceeding.
2.JUDGEMENT PROCEDURE STEP 1
1. Turn ignition switch OFF.
2. Keep pressing shift lock release button.
3. Move selector lever from “P” to “D” position.
4. Turn ignition switch ON. (Do not start engine.)
5. Keep pressing overdrive control switch while OD OFF indicator lamp is lighting up for 2 seconds. (OD OFF indicator lamp is on.)
6. Keep pressing overdrive control swit ch and shift selector lever to the “2” position. (OD OFF indicator lamp
is on.)
7. Stop pressing overdrive control switch. (OD OFF indicator lamp is on.)
8. Shift selector lever to the “1” position. (OD OFF indicator lamp is on.)
9. Keep pressing overdrive control switch . (OD OFF indicator lamp is off.)
10. Depress accelerator pedal fully while pressing overdrive control switch.
>> GO TO 3.
3.CHECK SELF-DIAGNOSIS CODE
Check OD OFF indicator lamp. Refer to "Judgement of Self-diagnosis Code" .
>>DIAGNOSIS END
Judgement of Self-diagnosis Code
SCIA7140E
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AT-84
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS
OD OFF indicator lamp
All judgement flickers are the same.
All circuits that can be confirmed by self-diagnosis are OK. 1st judgement flicker is longer than others.
Output speed sensor circuit is short-circuited or disconnected.
⇒ Go to
AT- 1 0 0
.
2nd judgement flicker is longer than others.
Vehicle speed signal circuit is short-circuited or disconnected.
⇒ Go to AT- 1 5 3
. 4th judgement flicker is longer than others.
Shift solenoid valve A circuit is short-circuited or disconnected.
⇒ Go to
AT- 1 3 8 .
5th judgement flicker is longer than others.
Shift solenoid valve B circuit is short-circuited or disconnected.
⇒ Go to AT- 1 4 3
. 6th judgement flicker is longer than others.
Overrun clutch solenoid valve circuit is short-circuited or discon-
nected.
⇒ Go to
AT- 1 4 8
.
SCIA7161ESCIA5591E
SCIA5592ESCIA5594E
SCIA5595ESCIA5596E
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TROUBLE DIAGNOSISAT-85
< SERVICE INFORMATION >
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7th judgement flicker is longer than others.
Torque converter clutch solenoid valve circuit is short-circuited or
disconnected.
⇒ Go to AT- 1 2 3
. 8th judgement flicker is longer than others.
A/T fluid temperature sensor is disconnected or TCM power supply
circuit is damaged.
⇒ Go to
AT- 1 5 6 .
9th judgement flicker is longer than others.
Engine speed signal circuit is short-circuited or disconnected.
⇒ Go to AT- 1 0 5
. 10th judgement flicker is longer than others.
Input speed sensor circuit is short-circuited or disconnected.
⇒ Go to
AT- 1 6 2 .
OD OFF indicator lamp
SCIA5597ESCIA5598E
SCIA5599ESCIA7082E
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AT-86
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS
t1 = 2.5 seconds t2 = 2.0 seconds t3 = 1.0 second
How to Erase Self-diagnostic Results
1. If the ignition switch stays ON after repair work, be sure to turn ignition switch OFF once. Wait for at least
5 seconds and then turn it ON again.
2. Perform "Diagnostic Procedure Without CONSULT-III" .
3. Turn ignition switch OFF. (The se lf-diagnostic results will be erased.)
11th judgement flicker is longer than others.
Line pressure solenoid valve circuit is short-circuited or discon-
nected.
⇒ Go to AT- 1 3 3
. 12th judgement flicker is longer than others.
CAN communication line is damaged.
⇒ Go to
AT- 8 7
.
Lamp turns off.
Transmission range switch, overdrive control switch, closed throt-
tle position signal or wide open throttle position signal circuit is dis-
connected or TCM is damaged.
(Because overdrive control switch signal, closed throttle position
signal and wide open throttle position signal are input via CAN
communication line malfunction may continue after self-diagno-
sis.)
⇒ Go to AT- 2 0 4 , "
TCM Self-Diagnosis Does Not Activate" .
OD OFF indicator lamp
SCIA7083ESCIA7085E
SCIA4674E
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U1000 CAN COMM CIRCUITAT-87
< SERVICE INFORMATION >
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U1000 CAN COMM CIRCUIT
DescriptionINFOID:0000000005928107
CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle mul-
tiplex communication line with high data communica tion speed and excellent malfunction detection ability.
Many electronic control units are equipped onto a vehicle, and each control unit shares information and links
with other control units during operation (not independent). In CAN communication, control units are con-
nected with 2 communication lines (CAN H line, CAN L li ne) allowing a high rate of information transmission
with less wiring. Each control unit transmits/recei ves data but selectively reads required data only.
On Board Diagnosis LogicINFOID:0000000005928108
• This is an OBD-II self-diagnostic item.
• Diagnostic trouble code “U1000 CAN COMM CIRCUIT” wit h CONSULT-III or 12th judgement flicker without
CONSULT-III is detected when TCM cannot communicate to other control units.
Possible CauseINFOID:0000000005928109
Harness or connector
(CAN communication line is open or shorted.)
DTC Confirmation ProcedureINFOID:0000000005928110
CAUTION:
If performing this “DTC Confirmation Procedure” again, always turn ignition switch OFF and wait at
least 10 seconds before continuing.
After the repair, perform the following procedure to confirm the malfunction is eliminated.
WITH CONSULT-III
1. Turn ignition switch ON.
2. Select “DATA MONITOR” mode for “TRANSMISSION” with CONSULT-III.
3. Touch “START”.
4. Wait at least 6 seconds or start engine and wait for at least 6 seconds.
5. If DTC is detected, go to AT-89, "
Diagnosis Procedure".
WITH GST
Follow the procedure “WITH CONSULT-III”.
WITHOUT CONSULT-III
1. Turn ignition switch ON.
2. Wait at least 6 seconds or start engine and wait at least 6 seconds.
3. Perform self-diagnosis. Refer to AT-82, "
Diagnosis Procedure without CONSULT-III".
4. If DTC is detected, go to AT-89, "
Diagnosis Procedure".
Revision: May 2010 2011 Versa