Nissan Quest E52. Instruction — part 1223
TM-122
< DTC/CIRCUIT DIAGNOSIS >
[CVT: RE0F09B]
P1726 THROTTLE CONTROL SIGNAL
P1726 THROTTLE CONTROL SIGNAL
Description
INFOID:0000000009650195
The electric throttle control actuator consists of throttle control motor, accelerator pedal position sensor, throt-
tle position sensor, etc. The actuator sends a signal to the ECM, and ECM sends the signal to TCM via CAN
communication.
DTC Logic
INFOID:0000000009650196
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
PRECONDITIONING
If “DTC CONFIRMATION PROCEDURE” has been previously conducted, always turn ignition switch OFF and
wait at least 10 seconds before conducting the next test.
>> GO TO 2.
2.
CHECK DTC DETECTION
With CONSULT
1.
Start the engine.
2.
Maintain the idling condition for 10 seconds or more.
3.
Check DTC.
Is “P1726” detected?
YES
>> Go to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000009650197
1.
CHECK DTC WITH ECM
With CONSULT
1.
Turn ignition switch ON.
2.
Perform “Self Diagnostic Results” in “ENGINE”.
Is any DTC detected?
YES
>> Check DTC detected item. Refer to
NO
>> Check intermittent incident. Refer to
GI-42, "Intermittent Incident"
.
DTC
Trouble diagnosis name
DTC detection condition
Possible cause
P1726
Throttle Control Signal Cir-
cuit
TCM receives unusual signal of engine sys-
tem from ECM
Harness or connectors
(Electric throttle sensor signal circuit is open
or shorted.)
P1740 SELECT SOLENOID
TM-123
< DTC/CIRCUIT DIAGNOSIS >
[CVT: RE0F09B]
C
E
F
G
H
I
J
K
L
M
A
B
TM
N
O
P
P1740 SELECT SOLENOID
DTC Logic
INFOID:0000000009650198
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
PRECONDITIONING
If “DTC CONFIRMATION PROCEDURE” has been previously conducted, always turn ignition switch OFF and
wait at least 10 seconds before conducting the next test.
>> GO TO 2.
2.
CHECK DTC DETECTION
With CONSULT
1.
Start the engine.
2.
Operate selector lever and keep for 1 second or more in each position.
3.
Check DTC.
With GST
Follow the procedure “With CONSULT”.
Is “P1740” detected?
YES
>> Go to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000009650199
1.
CHECK LOCK-UP SELECT SOLENOID VALVE
1.
Turn ignition switch OFF.
2.
Disconnect the CVT unit connector.
3.
Check the lock-up select solenoid valve. Refer to
TM-124, "Component Inspection (Lock-up Select Sole-
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Replace the transaxle assembly due to malfunction in the lock-up select solenoid valve. Refer to
TM-174, "Removal and Installation"
2.
CHECK HARNESS BETWEEN TCM AND CVT UNIT
1.
Disconnect the TCM connector.
2.
Check the continuity between TCM harness connector terminal and CVT unit harness connector terminal.
3.
Check the continuity between TCM harness connector terminal and ground.
DTC
Trouble diagnosis name
DTC detection condition
Possible cause
P1740
Lock-up Select Solenoid
Valve Circuit
When lock-up select solenoid valve command
value of TCM is ON, the OFF status of lock-up
select solenoid valve monitor value keeps for
0.2 seconds or more
• Harness or connectors
(Lock-up select solenoid circuit is open
or shorted.)
• Lock-up select solenoid valve
When lock-up select solenoid valve command
value of TCM is OFF, the ON status of lock-up
select solenoid valve monitor value keeps for
0.2 seconds or more
TCM
CVT unit
Continuity
Connector
Terminal
Connector
Terminal
F23
37
F24
13
Existed
TM-124
< DTC/CIRCUIT DIAGNOSIS >
[CVT: RE0F09B]
P1740 SELECT SOLENOID
Is the inspection result normal?
YES
>> Check intermittent incident. Refer to
GI-42, "Intermittent Incident"
.
NO
>> Repair or replace damaged parts.
Component Inspection (Lock-up Select Solenoid Valve)
INFOID:0000000009650200
1.
CHECK LOCK-UP SELECT SOLENOID VALVE
Check the resistance between CVT unit connector terminal and ground.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace the transaxle assembly due to malfunction in the lock-up select solenoid valve. Refer to
TM-174, "Removal and Installation"
TCM
—
Continuity
Connector
Terminal
F23
37
Ground
Not existed
CVT unit
—
Condition
Resistance
Terminal
13
Ground
CVT fluid temperature: 20
°
C (68
°
F)
12.3 – 13.5
Ω
CVT fluid temperature: 50
°
C (122
°
F)
13.7 – 15.1
Ω
CVT fluid temperature: 80
°
C (176
°
F)
15.1 – 16.7
Ω
P1777 STEP MOTOR
TM-125
< DTC/CIRCUIT DIAGNOSIS >
[CVT: RE0F09B]
C
E
F
G
H
I
J
K
L
M
A
B
TM
N
O
P
P1777 STEP MOTOR
DTC Logic
INFOID:0000000009650201
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
CAUTION:
Always drive vehicle at a safe speed.
1.
PRECONDITIONING
If “DTC CONFIRMATION PROCEDURE” has been previously conducted, always turn ignition switch OFF and
wait at least 10 seconds before conducting the next test.
>> GO TO 2.
2.
CHECK DTC DETECTION
With CONSULT
1.
Start the engine.
2.
Drive the vehicle.
3.
Maintain the following conditions for 5 seconds or more.
With GST
Follow the procedure “With CONSULT”.
Is “P1777” detected?
YES
>> Go to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000009650202
1.
CHECK STEP MOTOR CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect the TCM connector.
3.
Check the resistance between TCM harness connector terminals.
4.
Check the resistance between TCM harness connector terminals and ground.
DTC
Trouble diagnosis name
DTC detection condition
Possible cause
P1777
Step Motor Circuit
When step motor command value of TCM is
ON, the OFF status of step motor monitor
value keeps for 0.2 seconds or more
• Harness or connectors
(Step motor circuit is open or shorted.)
• Step motor
When step motor command value of TCM is
OFF, the ON status of step motor monitor
value keeps for 0.2 seconds or more
Selector lever
: “D” position
Vehicle speed
: 20 km/h (13 MPH) or more
TCM
Resistance (Approx.)
Connector
Terminal
F23
27
28
30.0
Ω
29
30
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