2006 INFINITI M35 air condition

DTC P1841 ATF PRESSURE SWITCH 1
AT-173
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Revision: 2006 January2006 M35/M45
Diagnostic ProcedureNCS001P6
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
4th gear), and confirm
the ON/OFF actuation of the “ATF PRES SW 1”.
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-
CUIT" .
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- 2 3 6 , "Control Valve With TCM and A/T Fluid
Temperature Sensor 2" .
NG >> Repair or replace damaged parts.
4. CHECK DTC
Perform “DTC Confirmation Procedure”. Refer to AT- 1 7 2 , "
DTC Confirmation Procedure" .
OK or NG
OK >>INSPECTION END
NG >> GO TO 2.
Item name Condition Display value
ATF PRES SW 1Front brake engaged. Refer to AT- 2 1
. ON
Front brake disengaged. Refer to AT- 2 1
. OFF
PCIA0067E

AT-174
DTC P1843 ATF PRESSURE SWITCH 3
Revision: 2006 January2006 M35/M45
DTC P1843 ATF PRESSURE SWITCH 3PFP:25240
DescriptionNCS001P7
Fail-safe function to detect input clutch solenoid valve condition.
CONSULT-II Reference ValueNCS001P8
On Board Diagnosis LogicNCS001P9
This is not an OBD-II self-diagnostic item.
Diagnostic trouble code “P1843 ATF PRES SW 3/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 3
is irregular during depressing accelerator pedal. (Other than during shift change.)
Possible CauseNCS001PA
AT F p r e s s u r e s w i t c h 3
Harness or connectors
(Switch circuit is open or shorted.)
DTC Confirmation ProcedureNCS001PB
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: “3”
“4” (I/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 (P1843) is detected, go to AT-175, "
Diagnostic Procedure" .
If DTC (P1752) is detected, go to AT-148, "
Diagnostic Procedure" .
Item name Condition Display value
ATF PRES SW 3Input clutch engaged. Refer to AT- 2 1
. ON
Input clutch disengaged. Refer to AT- 2 1
. OFF
BCIA0030E

DTC P1843 ATF PRESSURE SWITCH 3
AT-175
D
E
F
G
H
I
J
K
L
MA
B
AT
Revision: 2006 January2006 M35/M45
Diagnostic ProcedureNCS001PC
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
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-
CUIT" .
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- 2 3 6 , "Control Valve With TCM and A/T Fluid
Temperature Sensor 2" .
NG >> Repair or replace damaged parts.
4. CHECK DTC
Perform “DTC Confirmation Procedure”. Refer to AT- 1 7 4 , "
DTC Confirmation Procedure" .
OK or NG
OK >>INSPECTION END
NG >> GO TO 2.
Item name Condition Display value
ATF PRES SW 3Input clutch engaged. Refer to AT- 2 1
. ON
Input clutch disengaged. Refer to AT- 2 1
. OFF
PCIA0067E

AT-176
DTC P1845 ATF PRESSURE SWITCH 5
Revision: 2006 January2006 M35/M45
DTC P1845 ATF PRESSURE SWITCH 5PFP:25240
DescriptionNCS001PD
Fail-safe function to detect direct clutch solenoid valve condition.
CONSULT-II Reference ValueNCS001PE
On Board Diagnosis LogicNCS001PF
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 CauseNCS001PG
AT F p r e s s u r e s w i t c h 5
Harness or connectors
(Switch circuit is open or shorted.)
DTC Confirmation ProcedureNCS001PH
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”
“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 5Direct clutch engaged. Refer to AT- 2 1
. ON
Direct clutch disengaged. Refer to AT- 2 1
. OFF
BCIA0030E

DTC P1845 ATF PRESSURE SWITCH 5
AT-177
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E
F
G
H
I
J
K
L
MA
B
AT
Revision: 2006 January2006 M35/M45
Diagnostic ProcedureNCS001PI
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
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-
CUIT" .
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- 2 3 6 , "Control Valve With TCM and A/T Fluid
Temperature Sensor 2" .
NG >> Repair or replace damaged parts.
4. CHECK DTC
Perform “DTC Confirmation Procedure”. Refer to AT- 1 7 6 , "
DTC Confirmation Procedure" .
OK or NG
OK >>INSPECTION END
NG >> GO TO 2.
Item name Condition Display value
ATF PRES SW 5Direct clutch engaged. Refer to AT- 2 1
. ON
Direct clutch disengaged. Refer to AT- 2 1
. OFF
PCIA0067E

AT-178
DTC P1846 ATF PRESSURE SWITCH 6
Revision: 2006 January2006 M35/M45
DTC P1846 ATF PRESSURE SWITCH 6PFP:25240
DescriptionNCS001PJ
Fail-safe function to detect high and low reverse clutch solenoid valve condition.
CONSULT-II Reference ValueNCS001PK
On Board Diagnosis LogicNCS001PL
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 CauseNCS001PM
AT F p r e s s u r e s w i t c h 6
Harness or connectors
(Switch circuit is open or shorted.)
DTC Confirmation ProcedureNCS001PN
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”
“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 6High and low reverse clutch engaged. Refer to AT- 2 1
. ON
High and low reverse clutch disengaged Refer to AT- 2 1
. OFF
BCIA0030E

DTC P1846 ATF PRESSURE SWITCH 6
AT-179
D
E
F
G
H
I
J
K
L
MA
B
AT
Revision: 2006 January2006 M35/M45
Diagnostic ProcedureNCS001PO
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 (2nd
3rd gear), and confirm
the ON/OFF actuation of the “ATF PRES SW 6”.
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-
CUIT" .
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- 2 3 6 , "Control Valve With TCM and A/T Fluid
Temperature Sensor 2" .
NG >> Repair or replace damaged parts.
4. CHECK DTC
Perform “DTC Confirmation Procedure”. Refer to AT- 1 7 8 , "
DTC Confirmation Procedure" .
OK or NG
OK >>INSPECTION END
NG >> GO TO 2.
Item name Condition Display value
ATF PRES SW 6High and low reverse clutch engaged.
Refer to AT- 2 1
.ON
High and low reverse clutch disengaged
Refer to AT- 2 1
.OFFPCIA0067E

AT-184
CLOSED THROTTLE POSITION AND WIDE OPEN THROTTLE POSITION CIR-
CUIT
Revision: 2006 January2006 M35/M45
CLOSED THROTTLE POSITION AND WIDE OPEN THROTTLE POSITION CIR-
CUIT
PFP:18002
CONSULT-II Reference ValueNCS001PR
Diagnostic ProcedureNCS001PS
1. CHECK CAN COMMUNICATION LINE
Perform the self-diagnosis. Refer to AT- 9 2 , "
SELF-DIAGNOSTIC RESULT MODE" , AT- 1 0 3 , "Diagnostic Pro-
cedure without CONSULT-II" .
Is a malfunction in the CAN communication indicated in the results?
YES >> Check CAN communication line. Refer to AT- 1 0 5 , "DTC U1000 CAN COMMUNICATION LINE" .
NO >> GO TO 2.
2. CHECK THROTTLE POSITION SIGNAL CIRCUIT
With CONSULT-II
1. Turn ignition switch ON. (Do not start engine.)
2. Select “ECU INPUT SIGNALS” in “DATA MONITOR” mode for
“A/T” with CONSULT-II.
3. Depress accelerator pedal and read out the value of “CLSD THL
POS” and “W/O THL POS”.
OK or NG
OK >>INSPECTION END
NG >> Check the following. If NG, repair or replace damaged parts.
Perform the self-diagnosis for “ENGINE” with CONSULT-II. Refer to EC-137, "SELF-DIAG
RESULTS MODE" (for VQ35DE engine), EC-850, "SELF-DIAG RESULTS MODE" (for
VK45DE engine).
Open circuit or short to ground or short to power in harness or connectors.
Pin terminals for damage or loose connection with harness connector.
Item name Condition Display value
CLSD THL POSReleased accelerator pedal. ON
Fully depressed accelerator pedal. OFF
W/O THL POSFully depressed accelerator pedal. ON
Released accelerator pedal. OFF
Accelerator Pedal OperationMonitor Item
CLSD THL POS W/O THL POS
Released ON OFF
Fully depressed OFF ON
PCIA0070E