Infiniti QX56 (JA60). Manual — part 943
TM-74
< COMPONENT DIAGNOSIS >
P1710 TRANSMISSION FLUID TEMPERATURE SENSOR
2.
CHECK A/T FLUID TEMPERATURE SENSOR 1
Check A/T fluid temperature sensor 1. Refer to
OK or NG
OK
>> GO TO 3.
NG
>> Replace the control valve with TCM. Refer to
TM-172, "Control Valve with TCM and A/T Fluid
Temperature Sensor 2 and Plug"
3.
CHECK SUB-HARNESS
1. Disconnect transmission range switch connector and TCM connector.
2. Check continuity between transmission range switch connector
(A) terminals and TCM connector (B) terminals.
3. If OK, check harness for short to ground and short to power.
OK or NG
OK
>> GO TO 4.
NG
>> Replace open circuit or short to ground and short to power in harness or connectors.
4.
CHECK TCM POWER SUPPLY AND GROUND CIRCUIT
1. Check TCM power supply and ground circuit. Refer to
2. Reinstall any part removed.
OK or NG
OK
>> Replace the control valve with TCM. Refer to
TM-172, "Control Valve with TCM and A/T Fluid
Temperature Sensor 2 and Plug"
NG
>> Repair or replace damaged parts.
5.
CHECK DTC
Perform “DTC Confirmation Procedure”.
• Refer to
TM-73, "DTC Confirmation Procedure"
OK or NG
OK
>> INSPECTION END
NG
>> GO TO 1.
Component Inspection
INFOID:0000000005148623
A/T FLUID TEMPERATURE SENSOR 1
1. Remove control valve with TCM. Refer to
TM-172, "Control Valve with TCM and A/T Fluid Temperature
2. Check resistance between transmission range switch connector
(A) terminals.
Item
Connector
Terminal
Continuity
Transmission range switch con-
nector
F505
6
Yes
TCM connector
F503
19
Transmission range switch con-
nector
F505
7
Yes
TCM connector
F503
18
JSDIA1330ZZ
Item
Terminal
Temperature
°C
(
°F)
Resistance (Ap-
prox.) (k
Ω)
0 (32)
15
A/T fluid temperature sensor 1
6-7
20 (68)
6.5
80 (176)
0.9
JSDIA1331ZZ
P1710 TRANSMISSION FLUID TEMPERATURE SENSOR
TM-75
< COMPONENT DIAGNOSIS >
C
E
F
G
H
I
J
K
L
M
A
B
TM
N
O
P
3. If NG, replace the control valve with TCM. Refer to
TM-76
< COMPONENT DIAGNOSIS >
P1721 VEHICLE SPEED SIGNAL
P1721 VEHICLE SPEED SIGNAL
Description
INFOID:0000000005148624
The vehicle speed signal is transmitted from combination meter to TCM by CAN communication line. The sig-
nal functions as an auxiliary device to the output speed sensor when it is malfunctioning. The TCM will then
use the vehicle speed signal.
CONSULT-III Reference Value in Data Monitor Mode
INFOID:0000000005148625
On Board Diagnosis Logic
INFOID:0000000005148626
• This is not an OBD-II self-diagnostic item.
• Diagnostic trouble code “P1721 VEHICLE SPEED SIGNAL” with CONSULT-III is detected when TCM does
not receive the proper vehicle speed signal (input by CAN communication) from combination meter.
Possible Cause
INFOID:0000000005148627
Harness or connectors
(The sensor circuit is open or shorted.)
DTC Confirmation Procedure
INFOID:0000000005148628
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-III
1. Turn ignition switch “ON”. (Do not start engine.)
2. Select “DATA MONITOR” mode for “TRANSMISSION” with CONSULT-III.
3. Start engine and maintain the following conditions for at least 5 consecutive seconds.
ACCELE POSI: 1/8 or less
VHCL/S SE-MTR: 30 km/h (17 MPH) or more
4. If DTC is detected, go to
Diagnosis Procedure
INFOID:0000000005148629
1.
CHECK CAN COMMUNICATION LINE
Perform the self-diagnosis. Refer
TM-32, "CONSULT-III Function (TRANSMISSION)"
Is a malfunction in the CAN communication indicated in the results?
YES
>> Check CAN communication line. Refer to
.
NO
>> GO TO 2.
2.
CHECK INPUT SIGNAL
With CONSULT-III
1. Start engine.
2. Select “ECU INPUT SIGNALS” in “DATA MONITOR” mode for “TRANSMISSION” with CONSULT-III.
3. Drive vehicle and read out the value of “VHCL/S SE-MTR”.
OK or NG
OK
>> GO TO 4.
Item name
Condition
Display value (km/h)
VHCL/S SE-MTR
During driving
Approximately matches the speedometer reading.
Item name
Condition
Display value (Approx.)(km/h)
VHCL/S SE-MTR
During driving
Approximately matches the speedometer reading.
P1721 VEHICLE SPEED SIGNAL
TM-77
< COMPONENT DIAGNOSIS >
C
E
F
G
H
I
J
K
L
M
A
B
TM
N
O
P
NG
>> GO TO 3.
3.
CHECK COMBINATION METERS
Check combination meter. Refer to
.
OK or NG
OK
>> GO TO 4.
NG
>> Repair or replace damaged parts.
4.
CHECK DTC
Perform “DTC Confirmation Procedure”.
• Refer to
TM-76, "DTC Confirmation Procedure"
OK or NG
OK
>> INSPECTION END
NG
>> GO TO 5.
5.
CHECK TCM POWER SUPPLY AND GROUND CIRCUIT
Check TCM power supply and ground circuit. Refer to
OK or NG
OK
>> GO TO 6.
NG
>> Repair or replace damaged parts.
6.
DETECT MALFUNCTIONING ITEM
Check the following items:
• The A/T assembly harness connector pin terminals for damage or loose connection with harness connector.
OK or NG
OK
>> Replace the control valve with TCM. Refer to
TM-172, "Control Valve with TCM and A/T Fluid
Temperature Sensor 2 and Plug"
.
NG
>> Repair or replace damaged parts.
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