Nissan Altima L32. Instruction — part 1469
TM-220
< ECU DIAGNOSIS >
[CVT: RE0F09B]
TCM
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 instruction mode position is inhibited, and the
transaxle 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 instruction
mode position 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”.
Instruction Mode Switch
If an unexpected signal is sent from the instruction mode 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 2,800
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, secondary
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.
CVT Lock-up Select Solenoid
If an unexpected signal is sent from the solenoid to the TCM, the CVT lock-up select solenoid is turned OFF to
cancel the lock-up.
TCM Power Supply (Memory Back-up)
Transaxle assembly is protected by limiting the engine torque when the memory back-up power supply (for
controlling) from the battery is not supplied to TCM. Normal statues is restored when turning the ignition switch
OFF to ON after the normal power supply.
DTC Inspection Priority Chart
INFOID:0000000004201777
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
.
Priority
Detected items (DTC)
1
U1000 CAN communication line
2
Except above
TCM
TM-221
< ECU DIAGNOSIS >
[CVT: RE0F09B]
C
E
F
G
H
I
J
K
L
M
A
B
TM
N
O
P
DTC Index
INFOID:0000000004201778
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
.
• *
1
: Refer to
TM-117, "Diagnosis Description"
• *
2
: These numbers are prescribed by SAE J2012.
OBD-II (DTC)
TCM self-diagnosis
Items
(CONSULT-III screen terms)
Reference page
MIL*
1
,“ENGINE” with
CONSULT-III
GST*
2
“TRANSMISSION”
with CONSULT-III
—
P0615
STARTER RELAY/CIRC
—
P0703
BRAKE SW/CIRC
P0705
P0705
PNP SW/CIRC
P0710
P0710
ATF TEMP SEN/CIRC
P0715
P0715
INPUT SPD SEN/CIRC
P0720
P0720
VEH SPD SEN/CIR AT
—
P0725
ENGINE SPEED SIG
—
P0730
BELT DAMG
P0740
P0740
TCC SOLENOID/CIRC
P0744
P0744
A/T TCC S/V FNCTN
P0745
P0745
L/PRESS SOL/CIRC
P0746
P0746
PRS CNT SOL/A FCTN
P0776
P0776
PRS CNT SOL/B FCTN
P0778
P0778
PRS CNT SOL/B CIRC
—
P0826
MANUAL MODE SWITCH
P0840
P0840
TR PRS SENS/A CIRC
—
P0841
PRESS SEN/FNCTN
P0845
P0845
TR PRS SENS/B CIRC
—
P0868
SEC/PRESS DOWN
—
P1701
TCM-POWER SUPPLY
—
P1705
TP SEN/CIRC A/T
—
P1722
ESTM VEH SPD SIG
—
P1723
CVT SPD SEN/FNCTN
—
P1726
ELEC TH CONTROL
P1740
P1740
LU-SLCT SOL/CIRC
—
P1745
L/PRESS CONTROL
P1777
P1777
STEP MOTR CIRC
P1778
P1778
STEP MOTR/FNC
U1000
U1000
CAN COMM CIRCUIT
TM-222
< SYMPTOM DIAGNOSIS >
[CVT: RE0F09B]
SYSTEM SYMPTOM
SYMPTOM DIAGNOSIS
SYSTEM SYMPTOM
Symptom Table
INFOID:0000000004201779
The diagnostics item numbers show the sequence for inspection. Inspect in order from item 1.
No.
Item
Symptom
Condition
Diagnostic Item
Reference
page
1
Shift Shock
Large shock. (“N”
→
“D” position)
ON vehicle
1. Engine idle speed
2. Engine speed signal
3. Accelerator pedal position sensor
4. CVT position
5. CVT fluid temperature sensor
6. CAN communication line
7. CVT fluid level and state
8. Line pressure test
9. Torque converter clutch solenoid valve
10. Lock-up select solenoid valve
11. PNP switch
OFF vehicle
12. Forward clutch
13. Control valve
2
Large shock. (“N”
→
“R” position)
ON vehicle
1. Engine idle speed
2. Engine speed signal
3. Accelerator pedal position sensor
4. CVT position
5. CVT fluid temperature sensor
6. CAN communication line
7. CVT fluid level and state
8. Line pressure test
9. Torque converter clutch solenoid valve
10. Lock-up select solenoid valve
11. PNP switch
OFF vehicle
12. Reverse brake
13. Control valve
3
Shock is too large for
lock-up.
ON vehicle
1. CVT position
2. Engine speed signal
3. CAN communication line
4. CVT fluid level and state
OFF vehicle
5. Torque converter
6. Control valve
SYSTEM SYMPTOM
TM-223
< SYMPTOM DIAGNOSIS >
[CVT: RE0F09B]
C
E
F
G
H
I
J
K
L
M
A
B
TM
N
O
P
4
Slips/Will
Not Engage
Vehicle cannot be
started from “D” posi-
tion.
ON vehicle
1. CVT fluid level and state
2. CVT position
3. CAN communication line
4. Line pressure test
5. Stall test
6. Step motor
7. Primary speed sensor
8. Secondary speed sensor
9. Accelerator pedal position sensor
10. CVT fluid temperature sensor
11. Secondary pressure sensor
12. Power supply
OFF vehicle
13. Oil pump assembly
14. Forward clutch
15. Control valve
16. Parking components
5
Vehicle cannot be
started from “R” posi-
tion.
ON vehicle
1. CVT fluid level and state
2. CVT position
3. CAN communication line
4. Line pressure test
5. Stall test
6. Step motor
7. Primary speed sensor
8. Secondary speed sensor
9. Accelerator pedal position sensor
10. CVT fluid temperature sensor
11. Secondary pressure sensor
12. Power supply
OFF vehicle
13. Oil pump assembly
14. Reverse brake
15. Control valve
16. Parking components
No.
Item
Symptom
Condition
Diagnostic Item
Reference
page
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