2006 NISSAN VERSA check engine

DTC P1778 STEP MOTOR - FUNCTION
CVT-169
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CVT
Revision: June 20062007 Versa
WITH GST
Follow the procedure “WITH CONSULT-II”.
Diagnostic ProcedureUCS0063V
1. CHECK STEP MOTOR
With CONSULT-II
It is monitoring whether “GEAR RATIO: 2.56 - 0.43” changes similarly to “STM STEP: −20 - 180” by DATA
MONITOR mode. Refer to CVT-64, "
DATA MONITOR MODE" .
Without CONSULT-II
Inspect the engine speed (rise and descend), vehicle speed, throttle position, and check shift change. Refer to
CVT-210, "
Vehicle Speed When Shifting Gears" .
OK or NG
OK >>INSPECTION END
NG >> Replace the transaxle assembly. Refer to CVT-207, "
Removal and Installation" .

SHIFT POSITION INDICATOR CIRCUIT
CVT-175
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CVT
Revision: June 20062007 Versa
SHIFT POSITION INDICATOR CIRCUITPFP:24810
DescriptionUCS006XJ
TCM sends the switch signals to combination meter via CAN communication line. Then selector lever position
is indicated on the shift position indicator.
CONSULT-II Reference ValueUCS00642
Diagnostic ProcedureUCS00643
1. CHECK INPUT SIGNALS
With CONSULT-II
1. Start engine.
2. Select “MAIN SIGNALS” in “DATA MONITOR” mode for “TRANSMISSION” with CONSULT-II and read
out the value of “RANGE”.
3. Check that the following three positions or indicators are same.
–Actual position of the selector lever
–“RANGE” on CONSULT-II screen
–Shift position indicator in the combination meter
OK or NG
OK >>INSPECTION END
NG >> Check the following.
SHIFT POSITION INDICATOR SYMPTOM CHART
Item name Condition Display value
RANGESelector lever in “N” or “P” position. N·P
Selector lever in “R” position. R
Selector lever in “D” position. D
Selector lever in “L” position. L
Items Presumed location of trouble
Actual position does not change.Park/neutral position switch

Refer to CVT-78, "DTC P0705 PARK/NEUTRAL POSITION
SWITCH" .
CVT main system (Fail-safe function actuated)

Refer to CVT-60, "SELF-DIAGNOSTIC RESULT MODE" .
Shift position indicator in the combination meter does not indicate
any position.
Perform the self-diagnosis for CVT and the combination meter.

Refer to CVT-60, "SELF-DIAGNOSTIC RESULT MODE" and
DI-5, "
COMBINATION METERS" . Actual position changes, but the shift position indicator in the
combination meter does not change.
Actual position differs from the shift position indicator in the com-
bination meter.
Shift position indicator in the combination meter does not indicate
specific position only.Check the combination meter.

Refer to DI-5, "COMBINATION METERS" .

TROUBLE DIAGNOSIS FOR SYMPTOMS
CVT-181
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CVT
Revision: June 20062007 Versa
5. DETECT MALFUNCTIONING ITEM
Check the following.

Harness and fuse for short or open between ignition switch and O/D OFF indicator lamp
Refer to PG-4, "
POWER SUPPLY ROUTING CIRCUIT" .
OK or NG
OK >> GO TO 6.
NG >> Repair or replace damaged parts.
6. CHECK SYMPTOM
Check again. Refer to CVT-49, "
Check before Engine Is Started" .
OK or NG
OK >>INSPECTION END
NG >> GO TO 7.
7. CHECK COMBINATION METERS
Check combination meters. Refer to DI-5, "
COMBINATION METERS"
OK or NG
OK >>INSPECTION END
NG >> Repair or replace damaged parts.
Engine Cannot Be Started in “P” and “N” PositionUCS00646
SYMPTOM:

Engine cannot be started with selector lever in “P” or “N” position.

Engine can be started with selector lever in “D”, “L” or “R” position.
DIAGNOSTIC PROCEDURE
1. CHECK SELF-DIAGNOSTIC RESULTS
Perform self-diagnosis check. Refer to CVT-60, "
SELF-DIAGNOSTIC RESULT MODE" .
Do the self-diagnostic results indicate PNP switch circuit or start signal circuit?
YES >> Check PNP switch circuit or start signal circuit. Refer to CVT-78, "DTC P0705 PARK/NEUTRAL
POSITION SWITCH" or CVT-72, "DTC P0615 START SIGNAL CIRCUIT" .
NO >> GO TO 2.
2. CHECK CVT POSITION
Check CVT position. Refer to CVT-196, "
Checking of CVT Position"
OK or NG
OK >> GO TO 3.
NG >> Adjust CVT position. Refer to CVT-195, "
Adjustment of CVT Position" .
3. CHECK STARTING SYSTEM
Check starting system. Refer to SC-10, "
STARTING SYSTEM" .
OK or NG
OK >>INSPECTION END
NG >> Repair or replace damaged parts.

TROUBLE DIAGNOSIS FOR SYMPTOMS
CVT-183
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CVT
Revision: June 20062007 Versa
5. CHECK TCM
1. Check TCM input/output signals. Refer to CVT-54, "
TCM Input/Output Signal Reference Values" .
2. If NG, re-check TCM pin terminals for damage or loose connection with harness connector.
OK or NG
OK >> Replace the transaxle assembly. Refer to CVT-207, "Removal and Installation" .
NG >> Repair or replace damaged parts.
Large Shock “N” → “R” PositionUCS00649
SYMPTOM:
There is large shock when shifting from “N” to “R” position.
DIAGNOSTIC PROCEDURE
1. CHECK SELF-DIAGNOSTIC RESULTS
Perform self-diagnosis check. Refer to CVT-60, "
SELF-DIAGNOSTIC RESULT MODE" .
Is any malfunction detected by self-diagnosis?
YES >> Check the malfunctioning system. Refer to CVT-61, "Display Items List" .
NO >> GO TO 2.
2. CHECK ENGINE IDLE SPEED
Check the engine idle speed. Refer to EC-75, "
Idle Speed and Ignition Timing Check" .
OK or NG
OK >> GO TO 3.
NG >> Repair.
3. CHECK CVT FLUID LEVEL
Check CVT fluid level. Refer to CVT-16, "
Checking CVT Fluid" .
OK or NG
OK >> GO TO 4.
NG >> Refill CVT fluid.
4. CHECK LINE PRESSURE
Check line pressure at idle. Refer to CVT-45, "
LINE PRESSURE TEST" .
OK or NG
OK >> GO TO 5.
NG >> Check the malfunctioning item. Refer to CVT-46, "
Judgement of Line Pressure Test" .
5. SYMPTOM CHECK
Check again. Refer to CVT-49, "
Check at Idle" .
OK or NG
OK >>INSPECTION END
NG >> GO TO 6.
6. CHECK TCM
1. Check TCM input/output signals. Refer to CVT-54, "
TCM Input/Output Signal Reference Values" .
2. If NG, re-check TCM pin terminals for damage or loose connection with harness connector.
OK or NG
OK >> Replace the transaxle assembly. Refer to CVT-207, "Removal and Installation" .
NG >> Repair or replace damaged parts.

TROUBLE DIAGNOSIS FOR SYMPTOMS
CVT-189
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CVT
Revision: June 20062007 Versa
Vehicle Does Not Decelerate by Engine BrakeUCS0064H
SYMPTOM:
Engine brake does not operate when releasing the accelerator pedal while the cruise test.
DIAGNOSTIC PROCEDURE
1. CHECK SELF-DIAGNOSTIC RESULTS
Perform self-diagnosis check. Refer to CVT-60, "
SELF-DIAGNOSTIC RESULT MODE" .
Is any malfunction detected by self-diagnosis?
YES >> Check the malfunctioning system. Refer to CVT-61, "Display Items List" .
NO >> GO TO 2.
2. CHECK CVT POSITION
Check CVT position. Refer to CVT-196, "
Checking of CVT Position"
OK or NG
OK >> GO TO 3.
NG >> Adjust CVT position. Refer to CVT-195, "
Adjustment of CVT Position" .
3. CHECK CVT FLUID LEVEL
Check CVT fluid level. Refer to CVT-16, "
Checking CVT Fluid" .
OK or NG
OK >> GO TO 4.
NG >> Refill CVT fluid.
4. CHECK LINE PRESSURE
Check line pressure at idle. Refer to CVT-45, "
LINE PRESSURE TEST" .
OK or NG
OK >> GO TO 5.
NG >> Check the malfunctioning item. Refer to CVT-46, "
Judgement of Line Pressure Test" .
5. CHECK SYMPTOM
Check again. Refer to CVT-50, "
Cruise Test" .
OK or NG
OK >>INSPECTION END
NG >> GO TO 6.
6. CHECK TCM
1. Check TCM input/output signals. Refer to CVT-54, "
TCM Input/Output Signal Reference Values" .
2. If NG, re-check TCM pin terminals for damage or loose connection with harness connector.
OK or NG
OK >> Replace the transaxle assembly. Refer to CVT-207, "Removal and Installation" .
NG >> Repair or replace damaged parts.

CVT-196
SHIFT CONTROL SYSTEM
Revision: June 20062007 Versa
Checking of CVT PositionUCS0064K
1. Place selector lever in “P” position, and turn ignition switch ON. (Do not start engine.)
2. Make sure selector lever can be shifted to other than “P” position when brake pedal is depressed. Also
make sure selector lever can be shifted from “P” position only when brake pedal is depressed.
3. Move the selector lever and check for excessive effort, sticking, noise or rattle.
4. Confirm the selector lever stops at each position with the feel of engagement when it is moved through all
the positions. Check that the actual position of the selector lever matches the position shown by the shift
position indicator and the manual lever on the transaxle.
5. The method of operating the selector lever to individual posi-
tions correctly should be as shown.

(A): Press selector button to operate selector lever, while
depressing the brake pedal.

(B): Press selector button to operate selector lever.

(C): Selector lever can be operated without pressing selector
button.
6. Confirm the back-up lamps illuminate only when selector lever is
placed in the “R” position. Confirm the back-up lamps do not illu-
minate when the selector lever is pushed toward the “R” position
side with the gear position remained in the “P” or “N” position.
7. Confirm the engine can only be started with the selector lever in the “P” and “N” positions.
8. Make sure transaxle is locked completely in “P” position.
WCIA0620E

CVT SHIFT LOCK SYSTEM
CVT-199
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Revision: June 20062007 Versa
Diagnostic ProcedureUCS006KN
SYMPTOM 1:

Selector lever cannot be moved from “P” position with ignition switch in ON position and brake
pedal depressed.

Selector lever can be moved from “P” position with ignition key in ON position and brake pedal
released.

Selector lever can be moved from “P” position when ignition switch is removed from key cylinder.
SYMPTOM 2:

Ignition key cannot be removed when selector lever is set to “P” position.

Ignition key can be removed when selector lever is set to any position except “P” position.
1. CHECK KEY INTERLOCK CABLE
Check key interlock cable for damage.
OK or NG
OK >> GO TO 2.
NG >> Repair key interlock cable. Refer to AT-239, "
Removal and Installation" .
2. CHECK CVT POSITION
Check CVT position. Refer to CVT-196, "
Checking of CVT Position" .
OK or NG
OK >> GO TO 3.
NG >> Adjust control cable. Refer to CVT-195, "
Adjustment of CVT Position" .
3. CHECK SHIFT LOCK SOLENOID AND PARK POSITION SWITCH
1. Turn ignition switch ON. (Do not start engine.)
2. Selector lever is set in “P” position.
3. Check operation sound.
OK or NG
OK >>INSPECTION END
NG - 1 >> With intelligent key: GO TO 4.
NG - 2 >> Without intelligent key: GO TO 5.
4. CHECK POWER SOURCE
1. Turn ignition switch ON. (Do not start engine.)
2. Check voltage between CVT device harness connector terminal
5 and ground.
OK or NG
OK >> GO TO 8.
NG >> GO TO 6.
Condition Brake pedal Operation sound
When ignition switch is turned to ON position and selector lever is set in
“P” position.Depressed Yes
Released No
Voltage:
Brake pedal depressed: Battery voltage
Brake pedal released: 0V
SCIA7934E

CVT-200
CVT SHIFT LOCK SYSTEM
Revision: June 20062007 Versa
5. CHECK POWER SOURCE
1. Turn ignition switch ON. (Do not start engine.)
2. Check voltage between CVT device harness connector terminal
5 and ground.
OK or NG
OK >> GO TO 9.
NG >> GO TO 6.
6. CHECK STOP LAMP SWITCH
1. Turn ignition switch OFF.
2. Disconnect stop lamp switch harness connector.
3. Check continuity between stop lamp switch harness connector
terminals 3 and 4.
Check stop lamp switch after adjusting brake pedal. Refer to
BR-6, "
BRAKE PEDAL" .
OK or NG
OK >> GO TO 7.
NG >> Repair or replace damaged parts.
7. DETECT MALFUNCTIONING ITEM
Check the following. If any items are damaged, repair or replace damaged parts.

Harness for short or open between ignition switch and stop lamp switch harness connector

Harness for short or open between stop lamp switch harness connector and CVT device harness connec-
tor

10A fuse [No.3, located in the fuse block (J/B)]

Ignition switch, Refer to PG-4, "POWER SUPPLY ROUTING CIRCUIT" .
OK or NG
OK >>INSPECTION END
NG >> Repair or replace damaged parts. Voltage:
Brake pedal depressed: Battery voltage
Brake pedal released: 0V
SCIA7935E
Condition Continuity
When brake pedal is depressed Yes
When brake pedal is released No
SCIA2126E