Nissan Frontier. Manual — part 1241
P0720 OUTPUT SPEED SENSOR
TM-175
< DTC/CIRCUIT DIAGNOSIS >
[5AT: RE5R05A]
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WITH GST
Follow the procedure “WITH CONSULT”.
Diagnosis Procedure
INFOID:0000000009480523
1.
CHECK INPUT SIGNAL
With CONSULT
1. Turn ignition switch ON.
2. Select “ECU INPUT SIGNALS” in “DATA MONITOR” mode for “TRANSMISSION” with CONSULT.
3. Start the engine.
4. Read out the value of “VHCL/S SE-A/T” while driving.
Check the value changes according to driving speed.
OK or NG
OK
>> GO TO 6.
NG
>> GO TO 2.
2.
CHECK TCM POWER SUPPLY AND GROUND CIRCUIT
Check TCM power supply and ground circuit. Refer to
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 connector.
OK or NG
OK
>> GO TO 4.
NG
>> Repair or replace damaged parts.
4.
CHECK SUB-HARNESS
1. Remove control valve with TCM. Refer to
TM-288, "Removal and Installation"
.
2. Disconnect transmission range switch connector and TCM connector.
3. Check continuity between transmission range switch connector
(A) terminals and TCM connector (B) terminals.
4. If OK, check harness for short to ground and short to power.
5. Reinstall any part removed.
OK or NG
OK
>> GO TO 5.
NG
>> Replace open circuit or short to ground and short to power in harness or connectors.
5.
REPLACE THE OUTPUT SPEED SENSOR AND CHECK DTC
1. Replace the output speed sensor. Refer to
2. Perform “DTC Confirmation Procedure”. Refer to
TM-174, "DTC Confirmation Procedure"
.
OK or NG
Item
Connector
Terminal
Continuity
Transmission range switch con-
nector
F505
8
Yes
TCM connector
F503
20
Transmission range switch con-
nector
F505
9
Yes
TCM connector
F503
17
Transmission range switch con-
nector
F505
10
Yes
TCM connector
F503
16
JSDIA1329GB
TM-176
< DTC/CIRCUIT DIAGNOSIS >
[5AT: RE5R05A]
P0720 OUTPUT SPEED SENSOR
OK
>> INSPECTION END
NG
>> Replace the control valve with TCM. Refer to
TM-288, "Removal and Installation"
6.
CHECK DTC
Perform “DTC Confirmation Procedure”.
• Refer to
TM-174, "DTC Confirmation Procedure"
OK or NG
OK
>> INSPECTION END
NG
>> GO TO 2.
P0725 ENGINE SPEED
TM-177
< DTC/CIRCUIT DIAGNOSIS >
[5AT: RE5R05A]
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P0725 ENGINE SPEED
Description
INFOID:0000000009480524
The engine speed signal is sent from the ECM to the TCM.
CONSULT Reference Value in Data Monitor Mode
INFOID:0000000009480525
On Board Diagnosis Logic
INFOID:0000000009480526
• This is not an OBD-II self-diagnostic item.
• Diagnostic trouble code “P0725” with CONSULT or 16th judgment flicker without CONSULT is detected
when TCM does not receive the ignition signal from ECM during engine cranking or running.
Possible Cause
INFOID:0000000009480527
Harness or connectors
(The ECM to the TCM circuit is open or shorted.)
DTC Confirmation Procedure
INFOID:0000000009480528
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
1. Turn ignition switch “ON” and select “DATA MONITOR” mode for “TRANSMISSION” with CONSULT.
2. Start engine and maintain the following conditions for at least 10 consecutive seconds.
VHCL/S SE-A/T: 10 km/h (6 MPH) or more
ACCELE POSI: More than 1/8
SLCT LVR POSI: “D” position
3. If DTC is detected, go to
.
Diagnosis Procedure
INFOID:0000000009480529
1.
CHECK CAN COMMUNICATION LINE
Perform the self-diagnosis. Refer to
TM-157, "CONSULT 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 DTC WITH TCM
With CONSULT
1. Start engine.
2. Select “ECU INPUT SIGNALS” in “DATA MONITOR” mode for “TRANSMISSION” with CONSULT.
3. While monitoring engine speed, check for engine speed change corresponding to wide-open throttle posi-
tion signal.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Check the ignition signal circuit.
• Refer to
(QR25DE) or
(VQ40DE).
Item name
Condition
Display value (rpm)
ENGINE SPEED
Engine running
Closely matches the tachometer reading.
TM-178
< DTC/CIRCUIT DIAGNOSIS >
[5AT: RE5R05A]
P0725 ENGINE SPEED
3.
CHECK DTC
Perform “DTC Confirmation Procedure”.
• Refer to
TM-177, "DTC Confirmation Procedure"
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> GO TO 4.
4.
CHECK TCM POWER SUPPLY AND GROUND CIRCUIT
Check TCM power supply and ground circuit. Refer to
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Repair or replace damaged parts.
5.
DETECT MALFUNCTIONING ITEM
Check the following.
• The A/T assembly harness connector pin terminals for damage or loose connection with harness connector.
Is the inspection result normal?
YES
>> Replace the control valve with TCM. Refer to
TM-288, "Removal and Installation"
NO
>> Repair or replace damaged parts.
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