Infiniti M35/M45 Y50. Manual — part 63
![](/vehicles/zatt/cen/houeebante/zyesengiller.png)
DTC P1843 ATF PRESSURE SWITCH 3
AT-175
D
E
F
G
H
I
J
K
L
M
A
B
AT
Diagnostic Procedure
NCS001PC
1.
CHECK INPUT SIGNAL
With CONSULT-II
1.
Start engine.
2.
Select “ECU INPUT SIGNALS” or “MAIN SIGNALS” in “DATA
MONITOR” mode for “A/T” with CONSULT-II.
3.
Drive vehicle in the “D” position (3rd
Þ
4th gear), and confirm
the ON/OFF actuation of the “ATF PRES SW 3”.
OK or NG
OK
>> GO TO 4.
NG
>> GO TO 2.
2.
CHECK TCM POWER SUPPLY AND GROUND CIRCUIT
Check TCM power supply and ground circuit. Refer to
AT-180, "MAIN POWER SUPPLY AND GROUND CIR-
OK or NG
OK
>> GO TO 3.
NG
>> Repair or replace damaged parts.
3.
DETECT MALFUNCTIONING ITEM
Check the following.
●
The A/T assembly harness connector pin terminals for damage or loose connection with harness connec-
tor.
OK or NG
OK
>> Replace the control valve with TCM. Refer to
AT-236, "Control Valve With TCM and A/T Fluid
NG
>> Repair or replace damaged parts.
4.
CHECK DTC
Perform “DTC Confirmation Procedure”. Refer to
AT-174, "DTC Confirmation Procedure"
.
OK or NG
OK
>> INSPECTION END
NG
>> GO TO 2.
Item name
Condition
Display value
ATF PRES SW 3
Input clutch engaged. Refer to
.
ON
Input clutch disengaged. Refer to
.
OFF
PCIA0067E
![](/vehicles/zatt/cen/houeebante/ptr.png)
AT-176
DTC P1845 ATF PRESSURE SWITCH 5
DTC P1845 ATF PRESSURE SWITCH 5
PFP:25240
Description
NCS001PD
Fail-safe function to detect direct clutch solenoid valve condition.
CONSULT-II Reference Value
NCS001PE
On Board Diagnosis Logic
NCS001PF
●
This is not an OBD-II self-diagnostic item.
●
Diagnostic trouble code “P1845 ATF PRES SW 5/CIRC” with CONSULT-II is detected when TCM detects
that actual gear ratio is normal, and relation between gear position and condition of ATF pressure switch 5
is irregular during depressing accelerator pedal. (Other than during shift change.)
Possible Cause
NCS001PG
●
ATF pressure switch 5
●
Harness or connectors
(Switch circuit is open or shorted.)
DTC Confirmation Procedure
NCS001PH
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If “DTC Confirmation Procedure” has been previously performed, always turn ignition switch OFF and
wait at least 10 seconds before performing the next test.
After the repair, perform the following procedure to confirm the malfunction is eliminated.
WITH CONSULT-II
1.
Start engine.
2.
Accelerate vehicle to maintain the following conditions.
ACCELE POSI: 1.5/8 - 2.0/8
SLCT LVR POSI: “D” position
GEAR: “1”
Þ
“2” (D/C ON/OFF)
Driving location: Driving the vehicle uphill (increased
engine load) will help maintain the driving conditions
required for this test.
3.
Perform step 2 again.
4.
Turn ignition switch OFF, then perform step 1 to 3 again.
5.
Check “SELF-DIAG RESULTS” mode for “A/T” with CONSULT-
II.
If DTC (P1845) is detected, go to
AT-177, "Diagnostic Procedure"
If DTC (P1762) is detected, go to
AT-156, "Diagnostic Procedure"
Item name
Condition
Display value
ATF PRES SW 5
Direct clutch engaged. Refer to
.
ON
Direct clutch disengaged. Refer to
.
OFF
BCIA0030E
![](/vehicles/zatt/cen/houeebante/hofo.png)
DTC P1845 ATF PRESSURE SWITCH 5
AT-177
D
E
F
G
H
I
J
K
L
M
A
B
AT
Diagnostic Procedure
NCS001PI
1.
CHECK INPUT SIGNAL
With CONSULT-II
1.
Start engine.
2.
Select “ECU INPUT SIGNALS” or “MAIN SIGNALS” in “DATA
MONITOR” mode for “A/T” with CONSULT-II.
3.
Drive vehicle in the “D” position (1st
Þ
2nd gear), and confirm
the ON/OFF actuation of the “ATF PRES SW 5”.
OK or NG
OK
>> GO TO 4.
NG
>> GO TO 2.
2.
CHECK TCM POWER SUPPLY AND GROUND CIRCUIT
Check TCM power supply and ground circuit. Refer to
AT-180, "MAIN POWER SUPPLY AND GROUND CIR-
OK or NG
OK
>> GO TO 3.
NG
>> Repair or replace damaged parts.
3.
DETECT MALFUNCTIONING ITEM
Check the following.
●
The A/T assembly harness connector pin terminals for damage or loose connection with harness connec-
tor.
OK or NG
OK
>> Replace the control valve with TCM. Refer to
AT-236, "Control Valve With TCM and A/T Fluid
NG
>> Repair or replace damaged parts.
4.
CHECK DTC
Perform “DTC Confirmation Procedure”. Refer to
AT-176, "DTC Confirmation Procedure"
.
OK or NG
OK
>> INSPECTION END
NG
>> GO TO 2.
Item name
Condition
Display value
ATF PRES SW 5
Direct clutch engaged. Refer to
.
ON
Direct clutch disengaged. Refer to
.
OFF
PCIA0067E
![](/vehicles/zatt/cen/houeebante/nooco.png)
AT-178
DTC P1846 ATF PRESSURE SWITCH 6
DTC P1846 ATF PRESSURE SWITCH 6
PFP:25240
Description
NCS001PJ
Fail-safe function to detect high and low reverse clutch solenoid valve condition.
CONSULT-II Reference Value
NCS001PK
On Board Diagnosis Logic
NCS001PL
●
This is not an OBD-II self-diagnostic item.
●
Diagnostic trouble code “P1846 ATF PRES SW 6/CIRC” with CONSULT-II is detected when TCM detects
that actual gear ratio is normal, and relation between gear position and condition of ATF pressure switch 6
is irregular during depressing accelerator pedal. (Other than during shift change.)
Possible Cause
NCS001PM
●
ATF pressure switch 6
●
Harness or connectors
(Switch circuit is open or shorted.)
DTC Confirmation Procedure
NCS001PN
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If “DTC Confirmation Procedure” has been previously performed, always turn ignition switch OFF and
wait at least 10 seconds before performing the next test.
After the repair, perform the following procedure to confirm the malfunction is eliminated.
WITH CONSULT-II
1.
Start engine.
2.
Accelerate vehicle to maintain the following conditions.
ACCELE POSI: 1.5/8 - 2.0/8
SLCT LVR POSI: “D” position
GEAR: “2”
Þ
“3” (HLR/C ON/OFF)
Driving location: Driving the vehicle uphill (increased
engine load) will help maintain the driving conditions
required for this test.
3.
Perform step 2 again.
4.
Turn ignition switch OFF, then perform step 1 to 3 again.
5.
Check “SELF-DIAG RESULTS” mode for “A/T” with CONSULT-
II.
If DTC (P1846) is detected, go to
AT-179, "Diagnostic Procedure"
If DTC (P1767) is detected, go to
AT-160, "Diagnostic Procedure"
Item name
Condition
Display value
ATF PRES SW 6
High and low reverse clutch engaged. Refer to
.
ON
High and low reverse clutch disengaged Refer to
.
OFF
BCIA0030E
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