2006 INFINITI M35 check engine

AT-158
DTC P1764 DIRECT CLUTCH SOLENOID VALVE FUNCTION
Revision: 2006 January2006 M35/M45
WITH GST
Follow the procedure “WITH CONSULT-II”.
Diagnostic ProcedureNCS001O4
1. CHECK INPUT SIGNALS
With CONSULT-II
1. Start engine.
2. Select “SELECTION FROM MENU” 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” and electrical
current value of “D/C SOLENOID”.
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- 1 8 0 , "
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 5 7 , "
DTC Confirmation Procedure" .
OK or NG
OK >>INSPECTION END
NG >> GO TO 2.
Item name ConditionDisplay value
(Approx.)
D/C SOLENOIDDirect clutch disengaged. Refer to AT- 2 1
. 0.6 - 0.8A
Direct clutch engaged. Refer to AT- 2 1
. 0 - 0.05A
ATF PRES SW 5Direct clutch engaged. Refer to AT- 2 1
. ON
Direct clutch disengaged. Refer to AT- 2 1
. OFF
SCIA4797E

AT-160
DTC P1767 HIGH AND LOW REVERSE CLUTCH SOLENOID VALVE
Revision: 2006 January2006 M35/M45
Diagnostic ProcedureNCS001OA
1. CHECK INPUT SIGNAL
With CONSULT-II
1. Turn ignition switch ON. (Do not start engine.)
2. Select “MAIN SIGNALS” in “DATA MONITOR” mode for “A/T”
with CONSULT-II.
3. Start engine.
4. Read out the value of “HLR/C SOLENOID” while driving.
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- 1 8 0 , "
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 5 9 , "
DTC Confirmation Procedure" .
OK or NG
OK >>INSPECTION END
NG >> GO TO 2.
Item name ConditionDisplay value
(Approx.)
HLR/C SOLHigh and low reverse clutch disengaged. Refer
to AT- 2 1
.0.6 - 0.8A
High and low reverse clutch engaged. Refer to
AT- 2 1
.0 - 0.05A
SCIA4793E

DTC P1769 HIGH AND LOW REVERSE CLUTCH SOLENOID VALVE FUNCTION
AT-161
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Revision: 2006 January2006 M35/M45
DTC P1769 HIGH AND LOW REVERSE CLUTCH SOLENOID VALVE FUNCTION
PFP:31940
DescriptionNCS001OB
High and low reverse clutch solenoid valve is controlled by the TCM in response to signals sent from the
PNP switch, vehicle speed sensor and accelerator pedal position sensor (throttle position sensor). Gears
will then be shifted to the optimum position.
This is not only caused by electrical malfunction (circuits open or shorted) but also by mechanical mal-
function such as control valve sticking, improper solenoid valve operation.
CONSULT-II Reference ValueNCS001OC
On Board Diagnosis LogicNCS001OD
This is an OBD-II self-diagnostic item.
Diagnostic trouble code “P1769 HLR/C SOL FNCTN” with CONSULT-II or 8th judgement flicker without
CONSULT-II is detected under the following conditions.
–When TCM detects that actual gear ratio is irregular, and relation between gear position and condition of
ATF pressure switch 6 is irregular during depressing accelerator pedal. (Other than during shift change.)
–When TCM detects that relation between gear position and condition of ATF pressure switch 6 is irregular
during releasing accelerator pedal. (Other than during shift change.)
Possible CauseNCS001OE
Harness or connectors
(Solenoid and switch circuits are open or shorted.)
High and low reverse clutch solenoid valve
ATF pressure switch 6
DTC Confirmation ProcedureNCS001OF
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 (P1769) is detected, go to AT-162, "
Diagnostic Procedure" .
If DTC (P1767) is detected, go to AT-160, "
Diagnostic Procedure" .
If DTC (P1846) is detected, go to AT-179, "
Diagnostic Procedure" .
Item name Condition Display value (Approx.)
HLR/C SOLHigh and low reverse clutch disengaged. Refer to AT- 2 1
. 0.6 - 0.8A
High and low reverse clutch engaged. Refer to AT- 2 1
. 0 - 0.05A
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

AT-162
DTC P1769 HIGH AND LOW REVERSE CLUTCH SOLENOID VALVE FUNCTION
Revision: 2006 January2006 M35/M45
WITH GST
Follow the procedure “WITH CONSULT-II”.
Diagnostic ProcedureNCS001OG
1. CHECK INPUT SIGNALS
With CONSULT-II
1. Start engine.
2. Select “SELECTION FROM MENU” 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” and electrical
current value of “HLR/C SOL”.
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- 1 8 0 , "
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 6 1 , "
DTC Confirmation Procedure" .
OK or NG
OK >>INSPECTION END
NG >> GO TO 2.
Item name ConditionDisplay value
(Approx.)
HLR/C SOLHigh and low reverse clutch disengaged.
Refer to AT- 2 1
.0.6 - 0.8A
High and low reverse clutch engaged. Refer
to AT- 2 1
.0 - 0.05A
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
SCIA4798E

AT-164
DTC P1772 LOW COAST BRAKE SOLENOID VALVE
Revision: 2006 January2006 M35/M45
Diagnostic ProcedureNCS001OM
1. CHECK INPUT SIGNAL
With CONSULT-II
1. Turn ignition switch ON. (Do not start engine.)
2. Select “SELECTION FROM MENU” in “DATA MONITOR” mode
for “A/T” with CONSULT-II.
3. Start engine.
4. Read out the value of “ON OFF SOL” while driving.
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- 1 8 0 , "
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 6 3 , "
DTC Confirmation Procedure" .
OK or NG
OK >>INSPECTION END
NG >> GO TO 2.
Item name Condition Display value
ON OFF SOLLow coast brake engaged. Refer to AT- 2 1
. ON
Low coast brake disengaged. Refer to AT- 2 1
. OFF
SCIA4794E

DTC P1774 LOW COAST BRAKE SOLENOID VALVE FUNCTION
AT-165
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Revision: 2006 January2006 M35/M45
DTC P1774 LOW COAST BRAKE SOLENOID VALVE FUNCTIONPFP:31940
DescriptionNCS001ON
Low coast brake solenoid valve is turned ON or OFF by the TCM in response to signals sent from the
PNP switch, vehicle speed sensor and accelerator pedal position sensor (throttle position sensor). Gears
will then be shifted to the optimum position.
This is not only caused by electrical malfunction (circuits open or shorted) but also by mechanical mal-
function such as control valve sticking, improper solenoid valve operation.
CONSULT-II Reference ValueNCS001OO
On Board Diagnosis LogicNCS001OP
This is an OBD-II self-diagnostic item.
Diagnostic trouble code “P1774 LC/B SOLENOID FNCT” with CONSULT-II or 7th judgement flicker with-
out CONSULT-II is detected under the following conditions.
–When TCM detects that actual gear ratio is irregular, and relation between gear position and condition of
ATF pressure switch 2 is irregular during depressing accelerator pedal. (Other than during shift change.)
–When TCM detects that relation between gear position and condition of ATF pressure switch 2 is irregular
during releasing accelerator pedal. (Other than during shift change.)
Possible CauseNCS001OQ
Harness or connectors
(Solenoid and switch circuits are open or shorted.)
Low coast brake solenoid valve
ATF pressure switch 2
DTC Confirmation ProcedureNCS001OR
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.
MANU MODE SW: ON
GEAR: “1” or “2” (LC/B ON/OFF)
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 (P1774) is detected, go to AT- 1 6 6 , "
Diagnostic Proce-
dure" .
If DTC (P1772) is detected, go to AT- 1 6 4 , "
Diagnostic Proce-
dure" .
WITH GST
Follow the procedure “WITH CONSULT-II”.
Item name Condition Display value
ON OFF SOLLow coast brake engaged. Refer to AT- 2 1
. ON
Low coast brake disengaged. Refer to AT- 2 1
. OFF
ATF PRES SW 2Low coast brake engaged. Refer to AT- 2 1
. ON
Low coast brake disengaged. Refer to AT- 2 1
. OFF
BCIA0030E

AT-166
DTC P1774 LOW COAST BRAKE SOLENOID VALVE FUNCTION
Revision: 2006 January2006 M35/M45
Diagnostic ProcedureNCS001OS
1. CHECK INPUT SIGNALS
With CONSULT-II
1. Start engine.
2. Select “SELECTION FROM MENU” in “DATA MONITOR” mode
for “A/T” with CONSULT-II.
3. Drive vehicle in the manual mode (“1st” or “2nd” gear), and con-
firm the ON/OFF actuation of the “ATF PRES SW 2” and “ON
OFF SOL”.
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- 1 8 0 , "
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 6 5 , "
DTC Confirmation Procedure" .
OK or NG
OK >>INSPECTION END
NG >> GO TO 2.
Item name Condition Display value
ON OFF SOLLow coast brake engaged. Refer to AT- 2 1
. ON
Low coast brake disengaged. Refer to AT- 2 1
. OFF
ATF PRES SW 2Low coast brake engaged. Refer to AT- 2 1
. ON
Low coast brake disengaged. Refer to AT- 2 1
. OFF
SCIA4794E

AT-170
DTC P1815 MANUAL MODE SWITCH
Revision: 2006 January2006 M35/M45
TCM terminals and data are reference value. Measured between each terminal and ground.
Diagnostic ProcedureNCS001OZ
1. CHECK CAN COMMUNICATION LINE
Perform the self-diagnosis. Refer to AT- 9 2 , "
SELF-DIAGNOSTIC RESULT MODE" .
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 MANUAL MODE SWITCH 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. Read out ON/OFF switching action of “MANU MODE SW”,
“NON M-MODE SW”, “UP SW LEVER”, “DOWN SW LEVER”.
Without CONSULT-II
Drive vehicle in the manual mode, and confirm that the actual gear position and the meter's indication of the
position mutually coincide when the selector lever is shifted to the “+ (up)” or “- (down)” side (1st
5th gear).
OK or NG
OK >> GO TO 4.
NG >> GO TO 3.
3. DETECT MALFUNCTIONING ITEM
Check the following.
Manual mode switch. Refer to AT-171, "Component Inspection" .
Pin terminals for damage or loose connection with harness connector.
Open circuit or short to ground or short to power in harness or connector for A/T device (manual mode
switch).
Unified meter and A/C amp. Refer to DI-5, "COMBINATION METERS" .
OK or NG
OK >> GO TO 4.
NG >> Repair or replace damaged parts.
Terminal Item Condition Data (Approx.)
3CAN-H – –
8CAN-L – –
9 Starter relaySelector lever in “N”, “P” positions. Battery voltage
Selector lever in “R”, “D” positions. 0V
Item name Condition Display Value
MANU MODE SWManual shift gate position (neutral) ON
Other than the above OFF
NON M-MODE SWManual shift gate position OFF
Other than the above ON
UP SW LEVERSelector lever: +side ON
Other than the above OFF
DOWN SW LEVERSelector lever: -side ON
Other than the above OFF
SCIA4988E