Nissan Altima 2007-2012 Service Manual: P1726 electric throttle control system
Description
Electric throttle control actuator consists of throttle control motor, accelerator pedal position sensor, throttle position sensor etc. The actuator sends a signal to the ECM, and ECM sends the signal to TCM with CAN communication.
DTC Logic
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
NOTE: If “DTC CONFIRMATION PROCEDURE” has been previously performed, always turn ignition switch OFF.
Then wait at least 10 seconds before performing the next test.
1.CHECK DTC DETECTION
1. Start engine and let it idle for 5 seconds.
2. Perform “SELF-DIAG RESULTS” mode for “TRANSMISSION”.
Is “P1726 ELEC TH CONTROL” detected? YES >> Go to TM-180, "Diagnosis Procedure".
NO >> Check intermittent incident. Refer to GI-42, "Intermittent Incident".
Diagnosis Procedure
1.CHECK DTC WITH ECM
1. Turn ignition switch ON.
2. Select “SELF-DIAG RESULTS” mode for “ENGINE”.
Is the inspection result normal? YES >> GO TO 2.
NO >> Check DTC Detected Item. Refer to EC-1555, "DTC Index".
2.CHECK DTC WITH TCM
Perform “SELF-DIAG RESULTS” mode for “TRANSMISSION”.
Is “P1726 ELEC TH CONTROL” detected? YES >> Replace TCM. Refer to TM-254, "Exploded View".
NO >> GO TO 3.
3.DETECT MALFUNCTIONING ITEMS
Check TCM connector pin terminals for damage or loose connection with harness connector.
Is the inspection result normal? YES >> Replace TCM. Refer to TM-254, "Exploded View".
NO >> Repair or replace damaged parts.
P1723 CVT speed sensor function
Description
The vehicle speed sensor CVT [output speed sensor (secondary speed sensor)]
detects the revolution of
parking gear and generates a pulse signal. The pulse signal is sent to the TCM,
...
P1740 lock-up select solenoid
valve
Description
• Lock-up select solenoid valve controls lock-up clutch pressure or forward
clutch pressure (reverse brake
pressure).
• When controlling lock-up clutch, the valve is turned OFF ...
Other materials:
B2110 PNP/Clutch interlock switch
Description
IPDM E/R confirms the shift position with the following signals.
• Park/neutral position (PNP) switch
• Shift position signal from BCM (CAN)
DTC Logic
DTC DETECTION LOGIC
NOTE:
• If DTC B2110 is displayed with DTC U1000, first perform the trouble diagnosis
for DTC U1000 ...
Collision diagnosis
For Frontal Collision
Check the SRS components using the following table.
• After the work is completed, perform self-diagnosis to check that no
malfunction is detected. Refer to SRC-
12, "SRS Operation Check".
SRS INSPECTION (FOR FRONTAL COLLISION)
For Side and Rollover Co ...
M&A branch line circuit
Diagnosis Procedure
INSPECTION PROCEDURE
1.CHECK CONNECTOR
1. Turn the ignition switch OFF.
2. Disconnect the battery cable from the negative terminal.
3. Check the terminals and connectors of the combination meter for damage, bend
and loose connection
(unit side and connector side).
...