Nissan Maxima Service and Repair Manual: P1777 step motor
Description
The step motor changes the step by turning 4 coils ON/OFF according to the signal from TCM. As a result, the flow of line pressure to primary pulley is changed and pulley ratio is controlled.
DTC Logic
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
CAUTION: Always drive vehicle at a safe speed.
NOTE: Immediately after performing any "DTC CONFIRMATION PROCEDURE", always turn ignition switch OFF.
Then wait at least 10 seconds before performing the next test.
1.CHECK DTC DETECTION
With CONSULT
-
Start engine.
-
Drive vehicle for at least 5 consecutive seconds.
-
Perform "Self Diagnostic Results" in "TRANSMISSION".
With GST
Follow the procedure "With CONSULT".
Diagnosis Procedure
Regarding Wiring Diagram information, refer to TM-126, "Wiring Diagram".
1.CHECK STEP MOTOR CIRCUIT
-
Turn ignition switch OFF.
-
Disconnect TCM connector.
-
Check resistance between TCM vehicle side harness connector terminals.
4. Check resistance between TCM vehicle side harness connector terminals and ground.
2.CHECK HARNESS BETWEEN TCM AND CVT UNIT (STEP MOTOR) (PART 1)
-
Disconnect CVT unit connector.
-
Check continuity between TCM vehicle side harness connector terminals and CVT unit vehicle side harness connector terminals.
3.CHECK HARNESS BETWEEN TCM AND CVT UNIT (STEP MOTOR) (PART 2)
Check continuity between TCM vehicle side harness connector terminals and ground.
4.CHECK STEP MOTOR
Check step motor. Refer to TM-111, "Component Inspection (Step Motor)".
5.DETECT MALFUNCTIONING ITEMS
Check TCM connector pin terminals for damage or loose connection with harness connector.
Component Inspection (Step Motor)
1.CHECK STEP MOTOR
1. Check resistance between CVT unit connector terminals.
2. Check resistance between CVT unit connector terminals and ground.
P1745 line pressure control
Description
The line pressure solenoid valve regulates the oil pump
discharge pressure to suit the driving condition in
response to a signal sent from the TCM.
DTC Logic
DTC DETECTION LOGIC
...
P1778 step motor
Description
The step motor changes the step by turning 4
coils ON/OFF according to the signal from TCM. As a result,
the flow of line pressure to primary pulley is changed and pulle ...
Other materials:
Vehicle security system
Your vehicle has two types of security systems:
Vehicle security system
NISSAN Vehicle Immobilizer System
The vehicle security system provides visual and
audible alarm signals if someone opens the
doors, trunk, or hood when the system is armed. It
is not, however, a motion detection ...
ECM branch line circuit
Diagnosis Procedure
1.CHECK CONNECTOR
Turn the ignition switch OFF.
Disconnect the battery cable from the negative terminal.
Check the following terminals and connectors for damage, bend and
loose connection (unit side and connector
side).
- Models without automatic drive positione ...
P1726 throttle control signal
Description
The 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 via CAN
communication.
DTC Logic
DTC DETECTION LOGIC
DTC CONF ...
Nissan Maxima Owners Manual
- Illustrated table of contents
- Safety-Seats, seat belts and supplemental restraint system
- Instruments and controls
- Pre-driving checks and adjustments
- Monitor, climate, audio, phone and voice recognition systems
- Starting and driving
- In case of emergency
- Appearance and care
- Do-it-yourself
- Maintenance and schedules
- Technical and consumer information
Nissan Maxima Service and Repair Manual
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