Nissan Juke Service and Repair Manual : P0725 engine speed
Description
The engine speed signal is transmitted from ECM to TCM by CAN communication line.
DTC Logic
DTC DETECTION LOGI
DTC CONFIRMATION PROCEDURE
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.
1.CHECK DTC DETECTION
With CONSULT-III
1. Turn ignition switch ON.
2. Select “DATA MONITOR” in “TRANSMISSION”.
3. Start engine and maintain the following conditions for at least 10 consecutive seconds.
PRI SPEED SEN : More than 1000 rpm
Is “P0725” detected? YES >> Go to TM-212, "Diagnosis Procedure".
NO >> Check intermittent incident. Refer to GI-42, "Intermittent Incident".
Diagnosis Procedure
1. CHECK DTC WITH ECM
With CONSULT-III
1. Turn ignition switch ON.
2. Select “SELF-DIAG RESULTS” in “ENGINE”.
Is the inspection result normal? YES >> GO TO 2.
NO >> Check the DTC detected item. Refer to EC-83, "CONSULT-III Function".
2. CHECK DTC WITH TCM
With CONSULT-III
Select “SELF-DIAG RESULTS” in “TRANSMISSION”.
Is the inspection result normal? YES >> GO TO 3.
NO >> Check the DTC detected item. Refer to TM-159, "CONSULT-III Function (TRANSMISSION)".
3. CHECK INPUT SIGNALS
With CONSULT-III
1. Start engine.
2. Select “DATA MONITOR” in “TRANSMISSION”.
3. While monitoring “ENG SPEED SIG”, check for engine speed change corresponding to “ACC PEDAL OPEN”.
Is the inspection result normal? YES >> GO TO 4.
NO >> Check ignition signal circuit. Refer to EC-414, "Component Function Check".
4. CHECK TCM
Check TCM input/output signals. Refer to TM-164, "Reference Value".
Is the inspection result normal? YES >> Check intermittent incident. Refer to GI-42, "Intermittent Incident".
NO >> Replace the TCM. Refer to TM-280, "Removal and Installation".
P0720 output speed sensor
DTC Logic
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If “DTC CONFIRMATION PROCEDURE” has been previously performed, always turn
ignit ...
P0730 incorrect gear ratio
Description
TCM selects the gear ratio using the engine load (throttle position), the
primary pulley revolution speed, and
the secondary pulley revolution speed as input signal. Then it changes th ...
Other materials:
P173B 1GR incorrect ratio
DTC Logic
DTC CONFIRMATION PROCEDURE
CAUTION:
• Be sure to perform “TM-445, "Diagnosis Procedure"” and then perform “DTC
CONFIRMATION PROCEDURE”.
• Never perform "DTC CONFIRMATION PROCEDURE" before the repairs. Doing so may
result in a secondary
malfunction.
• Be carefu ...
Starting difficult with cold engine
Description
CHART 3: STARTING DIFFICULT WITH COLD ENGINE
Diagnosis Procedure
1.CHECK ENGINE OIL LEVEL
Is the engine oil level correct?
Yes or No
Yes >> GO TO 2.
No >> Top up the oil.
2.CHECK ENGINE OIL
Check the grade of engine oil. Refer to LU-33, "Inspection".
...
Service
• Never use electrical test equipment to check SRS circuits unless instructed
to in this Service Manual.
• Before servicing the SRS, turn ignition switch OFF, disconnect battery
negative terminal and wait at least 3
minutes.
For approximately 3 minutes after the battery negative terminal ar ...