2005 NISSAN NAVARA engine control

AT-148
DTC P1767 HIGH AND LOW REVERSE CLUTCH SOLENOID VALVE
Diagnostic Procedure
ECS00G0V
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 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 toAT- 1 6 4 , "
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.
lA/T assembly harness connector pin terminals for damage or loose connection with harness connector.
OK or NG
OK >> Replace control valve with TCM. Refer toAT- 2 1 8 , "Control Valve With TCM and A/T Fluid Temper-
ature Sensor 2".
NG >> Repair or replace damaged parts.
4.CHECK DTC
PerformAT- 1 4 7 , "
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 toAT- 1 7
.0.6 - 0.8 A
High and low reverse clutch engaged.
Refer toAT- 1 7
.0 - 0.05 A
SCIA4793E

DTC P1769 HIGH AND LOW REVERSE CLUTCH SOLENOID VALVE FUNCTION
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DTC P1769 HIGH AND LOW REVERSE CLUTCH SOLENOID VALVE FUNCTION
PFP:31940
DescriptionECS00G0W
lHigh and low reverse clutch solenoid valve is controlled by TCM in response to signals sent from PNP
switch, vehicle speed sensor and accelerator pedal position sensor. Gears will then be shifted to the opti-
mum position.
lThis 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 ValueECS00G0X
On Board Diagnosis LogicECS00G0Y
Diagnostic trouble code “P1769 HLR/C SOL FNCTN” with CONSULT-II or 8th judgement flicker without CON-
SULT-II is detected under the following conditions.
lWhen 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)
lWhen 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 CauseECS00G0Z
lHarness or connectors
(The solenoid and switch circuits are open or shorted.)
lHigh and low reverse clutch solenoid valve
lATFpressureswitch6
DTC Confirmation ProcedureECS00G10
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 toAT- 1 5 0 , "
Diagnostic Procedure".
If DTC (P1767) is detected, go toAT- 1 4 8 , "
Diagnostic Procedure".
If DTC (P1846) is detected, go toAT- 1 6 3 , "
Diagnostic Procedure".
Item name Condition Display value (Approx.)
HLR/C SOLHigh and low reverse clutch disengaged. Refer toAT- 1 7
.0.6-0.8A
High and low reverse clutch engaged. Refer toAT- 1 7
.0-0.05A
AT F P R E S S W 6High and low reverse clutch engaged. Refer toAT- 1 7
.ON
High and low reverse clutch disengaged. Refer toAT- 1 7
.OFF
BCIA0031E

AT-150
DTC P1769 HIGH AND LOW REVERSE CLUTCH SOLENOID VALVE FUNCTION
WITHOUT CONSULT-II
1. Start engine.
2. Accelerate vehicle to maintain the following conditions.
Accelerator opening: 1.5/8 - 2.0/8
Selector lever position: “D” position
Gear position: “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 position, then perform step 1 to 3 again.
5. Perform self-diagnosis. Refer toAT-89, "
Diagnostic Procedure Without CONSULT-II".
6. If DTC is detected, go toAT- 1 5 0 , "
Diagnostic Procedure".
Diagnostic ProcedureECS00G11
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 “ATF PRES SW 6” and electrical cur-
rent 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 toAT- 1 6 4 , "
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.
lA/T assembly harness connector pin terminals for damage or loose connection with harness connector.
OK or NG
OK >> Replace control valve with TCM. Refer toAT- 2 1 8 , "Control Valve With TCM and A/T Fluid Temper-
ature Sensor 2".
NG >> Repair or replace damaged parts.
Item name ConditionDisplay value
(Approx.)
HLR/C SOLHigh and low reverse clutch disengaged.
Refer toAT- 1 7
.0.6 - 0.8 A
High and low reverse clutch engaged.
Refer toAT- 1 7
.0 - 0.05 A
AT F P R E S S W 6High and low reverse clutch engaged.
Refer toAT- 1 7
.ON
High and low reverse clutch disengaged.
Refer toAT- 1 7
.OFF
SCIA4798E

DTC P1772 LOW COAST BRAKE SOLENOID VALVE
AT-153
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Diagnostic ProcedureECS00G17
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 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 toAT- 1 6 4 , "
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.
lA/T assembly harness connector pin terminals for damage or loose connection with harness connector.
OK or NG
OK >> Replace control valve with TCM. Refer toAT- 2 1 8 , "Control Valve With TCM and A/T Fluid Temper-
ature Sensor 2".
NG >> Repair or replace damaged parts.
4.CHECK DTC
PerformAT- 1 5 2 , "
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 toAT- 1 7
.ON
Low coast brake disengaged. Refer toAT- 1 7
.OFF
SCIA4794E

AT-154
DTC P1774 LOW COAST BRAKE SOLENOID VALVE FUNCTION
DTC P1774 LOW COAST BRAKE SOLENOID VALVE FUNCTION
PFP:31940
DescriptionECS00G18
lLow coast brake solenoid valve is turned ON or OFF by TCM in response to signals sent from PNP
switch, vehicle speed sensor and accelerator pedal position sensor. Gears will then be shifted to the opti-
mum position.
lThis 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 ValueECS00G19
On Board Diagnosis LogicECS00G1A
Diagnostic trouble code “P1774 LC/B SOLENOID FNCT” with CONSULT-II or 7th judgement flicker without
CONSULT-II is detected under the following conditions.
lWhen 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)
lWhen 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 CauseECS00G1B
lHarness or connectors
(The solenoid and switch circuits are open or shorted.)
lLow coast brake solenoid valve
lATF pressure switch 2
DTC Confirmation ProcedureECS00G1C
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.
SLCTLVRPOSI:“1”or“2”position
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 toAT- 1 5 5 , "
Diagnostic Proce-
dure".
If DTC (P1772) is detected, go toAT- 1 5 3 , "
Diagnostic Proce-
dure".
Item name Condition Display value
ON OFF SOLLow coast brake engaged. Refer toAT- 1 7
.ON
Low coast brake disengaged. Refer toAT- 1 7
.OFF
AT F P R E S S W 2Low coast brake engaged. Refer toAT- 1 7
.ON
Low coast brake disengaged. Refer toAT- 1 7
.OFF
BCIA0031E

DTC P1774 LOW COAST BRAKE SOLENOID VALVE FUNCTION
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WITHOUT CONSULT-II
1. Start engine.
2. Accelerate vehicle to maintain the following conditions.
Selector lever position: “1” or “2” position
Gear position: “1” or “2” (LC/B ON/OFF)
3. Perform step 2 again.
4. Turn ignition switch OFF position, then perform step 1 to 3 again.
5. Perform self-diagnosis. Refer toAT-89, "
Diagnostic Procedure Without CONSULT-II".
6. If DTC is detected, go toAT- 1 5 5 , "
Diagnostic Procedure".
Diagnostic ProcedureECS00G1D
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 “1” or “2” position (1
1or 22gear), and con-
firm the ON/OFF actuation of “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 toAT- 1 6 4 , "
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.
lA/T assembly harness connector pin terminals for damage or loose connection with harness connector.
OK or NG
OK >> Replace control valve with TCM. Refer toAT- 2 1 8 , "Control Valve With TCM and A/T Fluid Temper-
ature Sensor 2".
NG >> Repair or replace damaged parts.
4.CHECK DTC
PerformAT- 1 5 4 , "
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 toAT- 1 7
.ON
Low coast brake disengaged. Refer toAT- 1 7
.OFF
AT F P R E S S W 2Low coast brake engaged. Refer toAT- 1 7
.ON
Low coast brake disengaged. Refer toAT- 1 7
.OFF
SCIA4794E

DTC P1841 ATF PRESSURE SWITCH 1
AT-157
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Diagnostic ProcedureECS00G1J
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 “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 toAT- 1 6 4 , "
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.
lA/T assembly harness connector pin terminals for damage or loose connection with harness connector.
OK or NG
OK >> Replace control valve with TCM. Refer toAT- 2 1 8 , "Control Valve With TCM and A/T Fluid Temper-
ature Sensor 2".
NG >> Repair or replace damaged parts.
4.CHECK DTC
PerformAT- 1 5 6 , "
DTC Confirmation Procedure".
OK or NG
OK >>INSPECTION END
NG >> GO TO 2.
Item name Condition Display value
AT F P R E S S W 1Front brake engaged. Refer toAT- 1 7
.ON
Front brake disengaged. Refer toAT- 1 7
.OFF
PCIA0067E

DTC P1843 ATF PRESSURE SWITCH 3
AT-159
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Diagnostic ProcedureECS00G1P
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 “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 toAT- 1 6 4 , "
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.
lA/T assembly harness connector pin terminals for damage or loose connection with harness connector.
OK or NG
OK >> Replace control valve with TCM. Refer toAT- 2 1 8 , "Control Valve With TCM and A/T Fluid Temper-
ature Sensor 2".
NG >> Repair or replace damaged parts.
4.CHECK DTC
PerformAT- 1 5 8 , "
DTC Confirmation Procedure".
OK or NG
OK >>INSPECTION END
NG >> GO TO 2.
Item name Condition Display value
AT F P R E S S W 3Input clutch engaged. Refer toAT- 1 7
.ON
Input clutch disengaged. Refer toAT- 1 7
.OFF
PCIA0067E