Infiniti Q45 (FY33). Manual — part 36
SAT739J
SAT945IA
q
A
CHECK THROTTLE POSITION SWITCH
CIRCUIT.
1. Turn ignition switch to “ON”
position.
(Do not start engine.)
2. Select “TCM INPUT SIGNALS”
in “DATA MONITOR” mode for
A/T with CONSULT-II.
3. Apply vacuum to the throttle
opener. Refer to steps 1 and 2
of “Preparation”, “TCM SELF-
DIAGNOSTIC PROCEDURE
(No Tools)”, AT-49.
4. Read out “CLOSED THL/SW”
and “W/O THRL/P-SW”
depressing and releasing accel-
erator pedal.
Check the signal of throttle posi-
tion switch is indicated properly.
-------------------------------------------------------------------------------------------------------------------------------------- OR --------------------------------------------------------------------------------------------------------------------------------------
1. Turn ignition switch to “ON”
position.
(Do not start engine.)
2. Check voltage between TCM
terminals
q
14
,
q
21
and ground
while depressing, and releasing
accelerator pedal slowly. (After
warming up engine)
OK
E
NG
Check the following items:
I
Throttle position switch
Refer to “Components
Inspection”, AT-142.
I
Harness for short or
open between ignition
switch and throttle posi-
tion switch (Main har-
ness)
I
Harness for short or
open between throttle
position switch and TCM
(Main harness)
Perform DIAGNOSTIC TROUBLE CODE
(DTC) CONFIRMATION PROCEDURE,
AT-139.
OK
E
NG
1. Perform TCM input/
output signal inspection.
2. If NG, recheck TCM pin
terminals for damage or
loose connection with
harness connector.
INSPECTION END
Accelerator
pedal condi-
tion
Data monitor
CLOSED
THL/SW
W/O THRL/
P-SW
Released
ON
OFF
Fully
depressed
OFF
ON
Accelrator
pedal condi-
tion
Voltage
Terminal No.
q
14
Terminal No.
q
21
Released
Battery volt-
age
1V or less
Fully
depressed
1V or less
Battery volt-
age
GI
MA
EM
LC
EC
FE
PD
FA
RA
BR
ST
RS
BT
HA
EL
IDX
TROUBLE DIAGNOSIS FOR DTC P1705
Throttle Position Sensor (Cont’d)
H
H
H
AT-141
SAT521I
COMPONENT INSPECTION
Throttle position switch
Closed throttle position switch (idle position)
I
Check continuity between terminals
q
5
and
q
7
. (Refer to
“Preparation”, “TCM SELF-DIAGNOSTIC PROCEDURE (No
Tools)”, AT-49.)
Accelerator pedal condition
Continuity
Released
Yes
Depressed
No
I
To adjust closed throttle position switch, refer to EC section
(“Basic Inspection”, “TROUBLE DIAGNOSIS — Basic Inspec-
tion”).
SAT102J
Wide open throttle position switch
I
Check continuity between terminals
q
6
and
q
7
.
Accelerator pedal condition
Continuity
Released
No
Depressed
Yes
TROUBLE DIAGNOSIS FOR DTC P1705
Throttle Position Sensor (Cont’d)
AT-142
SAT341H
Overrun Clutch Solenoid Valve
DESCRIPTION
The overrun clutch solenoid valve is activated by the TCM in
response to signals sent from the PNP switch, overdrive control
switch, vehicle speed and throttle position sensors. The overrun
clutch operation will then be controlled.
TCM TERMINALS AND REFERENCE VALUE
Remarks: Specification data are reference values.
Terminal
No.
Wire color
Item
Condition
Judgement
standard
(Approx.)
8
L
Overrun clutch
solenoid valve
When overrun clutch solenoid valve
operates.
Battery voltage
When overrun clutch solenoid valve
does not operate.
0V
ON BOARD DIAGNOSIS LOGIC
Diagnostic trouble code
Malfunction is detected when ...
Check item (Possible cause)
: O/R CLTCH SOL/CIRC
TCM detects an improper voltage drop
when it tries to operate the solenoid
valve.
I
Harness or connectors
(The solenoid circuit is open or
shorted.)
I
Overrun clutch solenoid valve
: P1760
GI
MA
EM
LC
EC
FE
PD
FA
RA
BR
ST
RS
BT
HA
EL
IDX
TROUBLE DIAGNOSIS FOR DTC P1760
AT-143
SAT014K
SEF949Y
DIAGNOSTIC TROUBLE CODE (DTC) CONFIRMA-
TION PROCEDURE
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If “DIAGNOSTIC TROUBLE CODE CONFIRMATION PROCE-
DURE” has been previously conducted, always turn ignition
switch “OFF” and wait at least 5 seconds before conducting
the next test.
TESTING CONDITION:
Always drive vehicle on a level road to improve accuracy of
test.
After the repair, perform the following procedure to confirm the
malfunction is eliminated.
1)
Turn ignition switch “ON” and select “DATA MONITOR”
mode for “ENGINE” with CONSULT-II.
2)
Start engine.
3)
Accelerate vehicle to a speed of more than 10 km/h (6
MPH) in “D” position (OD “ON”).
4)
Release accelerator pedal completely in “D” position
(OD “OFF”).
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ OR ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Follow the procedure “With CONSULT-II”.
TROUBLE DIAGNOSIS FOR DTC P1760
Overrun Clutch Solenoid Valve (Cont’d)
AT-144
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