Nissan Juke Service and Repair Manual : P1777 step motor
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 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. Drive vehicle for at least 5 consecutive seconds.
3. Select “Self Diagnostic Results” in “TRANSMISSION”.
With GST
Follow the procedure “With CONSULT-III”.
Is “P1777” detected? YES >> Go to TM-250, "Diagnosis Procedure".
NO >> Check intermittent incident. Refer to GI-42, "Intermittent Incident".
Diagnosis Procedure
1.CHECK INPUT SIGNALS
With CONSULT-III
1. Start engine.
2. Select “DATA MONITOR”.
3. Start vehicle and read out the value of “STM STEP”, “SMCOIL A”, “SMCOIL B”, “SMCOIL C”, and “SMCOIL D”.
Is the inspection result normal? YES >> GO TO 4.
NO >> GO TO 2.
2.CHECK HARNESS BETWEEN TCM AND STEP MOTOR
1. Turn ignition switch OFF.
2. Disconnect CVT unit harness connector and TCM connector.
3. Check continuity between TCM connector terminals and CVT unit harness connector terminals.
4. If OK, check harness for short to ground and short to power.
5. If OK, check continuity between body ground and transaxle assembly.
6. Reinstall any part removed.
Is the inspection result normal? YES >> GO TO 3.
NO >> Repair or replace damaged parts.
3.CHECK STEP MOTOR
Check step motor. Refer to TM-251, "Component Inspection".
Is the inspection result normal? YES >> GO TO 4.
NO >> Repair or replace damaged parts.
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".
Component Inspection
STEP MOTOR
1.STEP MOTOR
1. Turn ignition switch OFF.
2. Disconnect CVT unit harness connector.
3. Check resistance between CVT unit harness connector terminals and ground.
Is the inspection result normal? YES >> INSPECTION END
NO >> Replace the transaxle assembly. Refer to TM-301, "Removal and Installation".
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 D ...P1778 step motor
Description • The step motor's 4 aspects of ON/OFF change according to the signal from TCM. As a result, the flow of line pressure to primary pulley is changed and pulley ratio is controlled. • T ...Other materials:
Front oil seal
FRONT OIL SEAL : Removal and Installation
REMOVAL
1. Remove the following parts.
• Front fender protector (RH): Refer to EXT-22, "Exploded View".
• Drive belt: Refer to EM-20, "Exploded View".
• Crankshaft pulley: Refer to EM-67, "Exploded View".
2. Remove front ...
Vacuum lines
MR16DDT : Exploded View
1. Clamp
2. Vacuum hose A
3. Vacuum piping
4. Vacuum hose B
A. To engine side
B. Paint mark C. To brake booster
MR16DDT : Removal and Installation
REMOVAL
1. Remove air duct and air cleaner case. Refer to EM-161, "Removal and
Installation".
2. Remov ...
Location of plastic parts
Precautions for Plastics
CAUTION:
• When repairing and painting a portion of the body adjacent to plastic parts,
consider their characteristics (influence of heat
and solvent) and remove them if necessary or take suitable measures to protect
them.
• Plastic parts should be repaired and pai ...