oil pressure NISSAN LATIO 2011 Service User Guide

TROUBLE DIAGNOSISAT-55
< SERVICE INFORMATION >
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Line Pressure
Judgement of Line Pressure Test
Road TestINFOID:0000000005928095
DESCRIPTION
• The purpose of the test is to det
ermine overall performance of A/T
and analyze causes of malfunctions.
• The road test consists of the following three parts:
1. Check before engine is started. Refer to AT- 5 6
.
2. Check at idle. Refer to AT- 5 6
.
3. Cruise test • Inspection all the item from Part 1 to Part 3. Refer to AT- 5 8
,
AT- 6 1
and AT- 6 2 .
Engine speed Line pressure [kPa (kg/cm
2 , psi)]
D, 2nd and 1st positions R position
Idle speed AT- 3 7 4 , "
Line Pressure"Sta ll sp ee d
JudgementSuspected parts
At idle Line pressure is low in all positions. • Oil pump wear
• Control piston damage
• Pressure regulator valve or plug sticking
• Spring for pressure regulator valve damaged
• Fluid pressure leakage between oil strainer and pressure regulator valve
• Clogged strainer
Line pressure is low in particular posi-
tion. • Fluid pressure leakage between manual valve and particular clutch
• For example, line pressure is:
− Low in “R” and “1 ” positions, but
− Normal in “D”, and “2” positions.
Therefore, fluid leakage exists at or around low and reverse brake circuit.
Refer to AT- 2 2 , "
Shift Mechanism".
Line pressure is high. • Accelerator pedal position signal malfunction
• A/T fluid temperature sensor damaged
• Line pressure solenoid valve sticking
• Short circuit of line pressure solenoid valve circuit
• Pressure modifier valve sticking
• Pressure regulator valve or plug sticking
• Open in dropping resistor circuit
At stall
speed Line pressure is low.
• Accelerator pedal position signal malfunction
• Line pressure solenoid valve sticking
• Short circuit of line pressure solenoid valve circuit
• Pressure regulator valve or plug sticking
• Pressure modifier valve sticking
• Pilot valve sticking
SAT786A
Revision: May 2010 2011 Versa

TROUBLE DIAGNOSISAT-71
< SERVICE INFORMATION >
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Slips/Will Not Engage No creep at all.
AT- 1 8 5
, AT- 1 8 6
ON vehicle
1. A/T fluid level
AT- 1 72. Line pressure testAT- 5 1
3. Control valve assemblyAT- 2 2 2
OFF vehicle4. Forward clutch
AT- 3 0 75. Oil pumpAT- 2 7 8
6. Torque converterAT- 2 5 7
Almost no shock or
clutches slipping in
change from D
1 to D2
. ON vehicle1. A/T fluid level
AT- 1 7
2. Accelerator pedal position sensorEC-415

(HR16DE), EC-
982 (MR18DE)
3. Line pressure test AT- 5 1
4. Accumulator servo releaseAT- 2 2 2
5. Control valve assemblyAT- 2 2 2
OFF vehicle 6. Brake band AT- 3 3 1
Almost no shock or
slipping in changing
from D
2 to D3 .ON vehicle 1. A/T fluid level
AT- 1 7
2. Accelerator pedal position sensorEC-415

(HR16DE), EC-
982 (MR18DE)
3. Line pressure test AT- 5 1
4. Control valve assemblyAT- 2 2 2
OFF vehicle5. High clutch
AT- 3 0 26. Forward clutchAT- 3 0 7
Almost no shock or
slipping in changing
from D
3 to D4 .ON vehicle 1. A/T fluid level
AT- 1 7
2. Accelerator pedal position sensorEC-415

(HR16DE), EC-
982 (MR18DE)
3. Line pressure test AT- 5 1
4. Control valve assemblyAT- 2 2 2
OFF vehicle 5. Brake band AT- 3 3 1
Races extremely fast
or slips in changing
from D
4 to D3 when
depressing accelera-
tor pedal. ON vehicle1. A/T fluid level
AT- 1 7
2. Accelerator pedal position sensorEC-415

(HR16DE), EC-
982 (MR18DE)
3. Line pressure test AT- 5 1
4. Line pressure solenoid valveAT- 1 3 3
5. Shift solenoid valve AAT- 1 3 8
6. Control valve assemblyAT- 2 2 2
OFF vehicle7. Brake band
AT- 3 3 18. Forward clutchAT- 3 0 7
ItemsSymptom Condition Diagnostic itemReference page
Revision: May 2010 2011 Versa

AT-72
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS
Slips/Will Not EngageRaces extremely fast
or slips in changing
from D
4 to D2 when
depressing accelera-
tor pedal. ON vehicle1. A/T fluid level
AT- 1 7
2. Accelerator pedal position sensorEC-415

(HR16DE), EC-
982 (MR18DE)
3. Line pressure test AT- 5 1
4. Line pressure solenoid valveAT- 1 3 3
5. Shift solenoid valve AAT- 1 3 8
6. Shift solenoid valve BAT- 1 4 3
7. Control valve assemblyAT- 2 2 2
OFF vehicle8. Brake band
AT- 3 3 19. Forward clutchAT- 3 0 7
Races extremely fast
or slips in changing
from D
3 to D2 when
depressing accelera-
tor pedal. ON vehicle1. A/T fluid level
AT- 1 7
2. Accelerator pedal position sensor EC-415

(HR16DE), EC-
982 (MR18DE)
3. Line pressure test AT- 5 1
4. Line pressure solenoid valveAT- 1 3 3
5. Shift solenoid valve BAT- 1 4 3
6. Control valve assemblyAT- 2 2 2
OFF vehicle7. Brake band
AT- 3 3 18. High clutchAT- 3 0 2
Races extremely fast
or slips in changing
from D
4 or D3 to D 1
when depressing ac-
celerator pedal. ON vehicle1. A/T fluid level
AT- 1 7
2. Accelerator pedal position sensorEC-415

(HR16DE), EC-
982 (MR18DE)
3. Line pressure test AT- 5 1
4. Line pressure solenoid valveAT- 1 3 3
5. Shift solenoid valve AAT- 1 3 8
6. Shift solenoid valve BAT- 1 4 3
7. Control valve assemblyAT- 2 2 2
OFF vehicle8. Forward clutch
AT- 3 0 79. Forward one-way clutchAT- 3 1 8
10. Low one-way clutchAT- 2 5 7
Vehicle will not run in
any position.ON vehicle
1. A/T fluid level
AT- 1 7
2. Control cable adjustmentAT- 2 1 7
3. Line pressure testAT- 5 1
4. Line pressure solenoid valveAT- 1 3 3
OFF vehicle5. Oil pump
AT- 2 7 8
6. High clutchAT- 3 0 2
7. Brake bandAT- 3 3 1
8. Low & reverse brakeAT- 3 1 4
9. Torque converterAT- 2 5 7
10. Parking componentsAT- 2 3 7
ItemsSymptom Condition Diagnostic itemReference page
Revision: May 2010 2011 Versa

TROUBLE DIAGNOSISAT-73
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Others Engine cannot be
started in “P” and “N”
positions.
AT- 1 8 2
ON vehicle
1. Ignition switch and starter
PG-4
, SC-9
2. Control cable adjustmentAT- 2 1 7
3. Transmission range switch adjustmentAT- 2 2 5
Engine starts in posi-
tions other than “P”
and “N”.ON vehicle
1. Control cable adjustment
AT- 2 1 7
2. Transmission range switch adjustmentAT- 2 2 5
Transaxle noise in“ P”
and “N” positions.ON vehicle1. A/T fluid level
AT- 1 7
2. Line pressure testAT- 5 1
3. Accelerator pedal position sensorEC-415

(HR16DE), EC-
982 (MR18DE)
4. Output speed sensor and vehicle speed signal AT- 1 0 0
, AT- 1 5 3
OFF vehicle5. Oil pump
AT- 2 7 86. Torque converterAT- 2 5 7
Vehicle moves when
changing into “P” po-
sition or parking gear
does not disengage
when shifted out of “P”
position.ON vehicle 1. Control cable adjustment
AT- 2 1 7
OFF vehicle 2. Parking componentsAT- 2 3 7
Vehicle runs in “N” po-
sition.
AT- 1 8 3
ON vehicle 1. Control cable adjustmentAT- 2 1 7
OFF vehicle2. Forward clutch
AT- 3 0 73. Reverse clutchAT- 2 9 7
4. Overrun clutchAT- 3 0 7
Vehicle braked when
shifting into “R” posi-
tion.ON vehicle
1. A/T fluid level
AT- 1 7
2. Control cable adjustmentAT- 2 1 7
3. Line pressure testAT- 5 1
4. Line pressure solenoid valveAT- 1 3 3
5. Control valve assemblyAT- 2 2 2
OFF vehicle6. High clutch
AT- 3 0 27. Brake band AT- 3 3 1
8. Forward clutchAT- 3 0 7
9. Overrun clutchAT- 3 0 7
Excessive creep. ON vehicle 1. Engine idling speed EC-24

(HR16DE), EC-
578 (MR18DE)
Engine stops when
shifting lever into “R”,
“D”, “2” and “1” posi-
tions. ON vehicle
1. Engine idling speed
EC-24

(HR16DE), EC-
578 (MR18DE)
2. A/T fluid level AT- 1 7
3. Torque converter clutch solenoid valveAT- 1 2 3
4. Control valve assemblyAT- 2 2 2
OFF vehicle 5. Torque converter AT- 2 5 7
ItemsSymptom Condition Diagnostic itemReference page
Revision: May 2010 2011 Versa

TROUBLE DIAGNOSISAT-75
< SERVICE INFORMATION >
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TCM Terminal and Reference ValueINFOID:0000000005928104
TCM HARNESS CONNECTOR TERMINAL LAYOUT
Terminals and Reference Values for TCM
Others Transaxle overheats.
ON vehicle
1. A/T fluid level
AT- 1 7
2. Engine idling speedEC-24

(HR16DE), EC-
578 (MR18DE)
3. Accelerator pedal position sensor EC-415

(HR16DE), EC-
982 (MR18DE)
4. Line pressure test AT- 5 1
5. Line pressure solenoid valveAT- 1 3 3
6. Control valve assemblyAT- 2 2 2
OFF vehicle7. Oil pump
AT- 2 7 8
8. Reverse clutchAT- 2 9 7
9. High clutchAT- 3 0 2
10. Brake bandAT- 3 3 1
11. Forward clutchAT- 3 0 7
12. Overrun clutchAT- 3 0 7
13. Low & reverse brakeAT- 3 1 4
14. Torque converterAT- 2 5 7
ATF shoots out during
operation.
White smoke emitted
from exhaust pipe
during operation.ON vehicle 1. A/T fluid level
AT- 1 7
OFF vehicle2. Reverse clutch
AT- 2 9 7
3. High clutchAT- 3 0 2
4. Brake bandAT- 3 3 1
5. Forward clutchAT- 3 0 7
6. Overrun clutchAT- 3 0 7
7. Low & reverse brakeAT- 3 1 4
Unusual smell at A/T
fluid charging pipe.ON vehicle 1. A/T fluid level
AT- 1 7
OFF vehicle2. Torque converter
AT- 2 5 7
3. Oil pumpAT- 2 7 8
4. Reverse clutchAT- 2 9 7
5. High clutchAT- 3 0 2
6. Brake bandAT- 3 3 1
7. Forward clutchAT- 3 0 7
8. Overrun clutchAT- 3 0 7
9. Low & reverse brakeAT- 3 1 4
ItemsSymptom Condition Diagnostic itemReference page
WCIA0717E
Revision: May 2010 2011 Versa

AT-118
< SERVICE INFORMATION >
P0734 4GR INCORRECT RATIO
P0734 4GR INCORRECT RATIO
DescriptionINFOID:0000000005928158
• This malfunction will not be detected while the OD OFF indicator lamp is indicating another self-diagnosismalfunction.
• This malfunction is detected when the A/T does not shif t into fourth gear position or the torque converter
clutch does not lock up as instructed by the TCM. This is not caused by electrical malfunction (circuits open
or shorted) but by mechanical malfunction such as c ontrol valve sticking, improper solenoid valve operation,
malfunctioning oil pump or torque converter clutch, etc.
CONSULT-III Reference Value in Data Monitor ModeINFOID:0000000005928159
Remarks: Specification data are reference values.
On Board Diagn osis LogicINFOID:0000000005928160
• This is an OBD-II self-diagnostic item.
• Diagnostic trouble code “P0734 4GR INCORRECT RATIO” with CONSULT-III is detected when A/T cannot
be shifted to the 4GR position even if electrical circuit is good.
• This diagnosis monitors actual gear position by checki ng the torque converter slip ratio calculated by TCM
as follows:
Torque converter slip ratio = A x C/B
A: Output shaft revolution signal from output speed sensor
B: Engine speed signal from ECM
C: Gear ratio determined as gear position which TCM supposes
If the actual gear position is much lower than the pos ition (4th) supposed by TCM, the slip ratio will be much
less than normal. In case the ratio does not reach t he specified value, TCM judges this diagnosis malfunc-
tion.
This malfunction will be caused when shift solenoid valve A is stuck open or shift solenoid valve B is stuck
closed.
• Gear positions supposed by TCM are as follows.
In case of gear position with no malfunctions: 1, 2, 3 and 4 positions
In case of gear position with shift so lenoid valve A stuck open: 2, 2, 3 and 3* positions
In case of gear position with shift sol enoid valve B stuck closed: 1, 2, 2 and 1* positions to each gear position
above
*: “P0734 4GR INCORRECT RATIO” is detected.
Possible CauseINFOID:0000000005928161
• Shift solenoid valve A
• Shift solenoid valve B
• Line pressure solenoid valve
• Each clutch
• Hydraulic control circuit
DTC Confirmation ProcedureINFOID:0000000005928162
CAUTION:
• Always drive vehicle at a safe speed.
• If performing this “DTC Confirmation Procedure” again, always turn ignition switch OFF and wait at
least 10 seconds before continuing.
After the repair, perform the following proc edure to confirm the malfunction is eliminated.
Gear position123 4
Shift solenoid valve A ON (Closed)OFF (Open)OFF (Open)ON (Closed)
Shift solenoid valve B ON (Closed)ON (Closed) OFF (Open)OFF (Open)
Item name Condition Display value (Approx.)
LINE PRES DTY Small throttle opening (Low line pressure) ⇔
Large
throttle opening (High line pressure) 0%
⇔ 94%
Revision: May 2010 2011 Versa

AT-128
< SERVICE INFORMATION >
P0744 TORQUE CONVERTER
P0744 TORQUE CONVERTER
DescriptionINFOID:0000000005928172
• This malfunction will not be detected while the OD OFF indicator lamp is indicating another self-diagnosismalfunction.
• This malfunction is detected when the A/T does not shif t into fourth gear position or the torque converter
clutch does not lock-up as instructed by the TCM. This is not caused by electrical malfunction (circuits open
or shorted) but by mechanical malfunction such as c ontrol valve sticking, improper solenoid valve operation,
malfunctioning oil pump or torque converter clutch, etc.
CONSULT-III Reference Value in Data Monitor ModeINFOID:0000000005928173
Remarks: Specification data are reference values.
On Board Diagn osis LogicINFOID:0000000005928174
• This is an OBD-II self-diagnostic item.
• Diagnostic trouble code “P0744 T/C CLUTCH FNCTN” wit h CONSULT-III is detected when A/T cannot per-
form lock-up even if electrical circuit is good.
• This diagnosis monitors actual gear position by checki ng the torque converter slip ratio calculated by TCM
as follows:
Torque converter slip ratio = A x C/B
A: Output shaft revolution signal from output speed sensor
B: Engine speed signal from ECM
C: Gear ratio determined as gear position which TCM supposes
If the actual gear position is much lower than the pos ition (4th) supposed by TCM, the slip ratio will be much
less than normal. In case the ratio does not reach t he specified value, TCM judges this diagnosis malfunc-
tion.
This malfunction will be caused when shift solenoid valve B is stuck closed.
• Gear positions supposed by TCM are as follows.
In case of gear position with no malfunctions: 1, 2, 3 and 4 positions
In case of gear position with shift solenoid valve B stuc k closed: 1, 2, 2 and 1* positions to each gear position
above
*: “P0744 T/C CLUTCH FNCTN” is detected.
Possible CauseINFOID:0000000005928175
• Line pressure solenoid valve
• Torque converter clutch solenoid valve
• Each clutch
• Hydraulic control circuit
DTC Confirmation ProcedureINFOID:0000000005928176
CAUTION:
• Always drive vehicle at a safe speed.
• If performing this “DTC Confirmation Procedure” again, always turn ignition switch OFF and wait at
least 10 seconds before continuing.
After the repair, perform the following proc edure to confirm the malfunction is eliminated.
WITH CONSULT-III
1. Start engine and select “DATA MONITOR” m ode for “TRANSMISSION” with CONSULT-III.
2. Touch “START”.
3. Make sure that output voltage of A/T fluid temperature sensor is within the range below.
FLUID TEMP SE: 0.4 - 1.5 V
If out of range, drive vehicle to decrease voltage (warm up the fluid) or stop engine to increase voltage
(cool down the fluid).
4. Select “TCC S/V FNCTN P0744” of “DTC & SR T CONFIRMATION” mode for “TRANSMISSION” with
CONSULT-III and touch “START”.
Item name Condition Display value (Approx)
TCC S/V DUTY Lock-up OFF ⇔ Lock-up ON 4% ⇔ 94%
Revision: May 2010 2011 Versa

P0745 PRESSURE CONTROL SOLENOID AAT-133
< SERVICE INFORMATION >
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P0745 PRESSURE CONTROL SOLENOID A
DescriptionINFOID:0000000005928178
The line pressure solenoid valve regulates the oil pum p discharge pressure to suit the driving condition in
response to signals sent from the TCM.
The line pressure duty cycle value is not constant when the closed throttle po sition switch is ON. To
confirm the line pressure duty cycle at low-pressure, the accelerator (throttle) sh ould be open until the
closed throttle position switch is OFF.
CONSULT-III Reference Val ue in Data Monitor ModeINFOID:0000000005928179
Remarks: Specification data are reference values.
On Board Diagnosis LogicINFOID:0000000005928180
• This is an OBD-II self-diagnostic item.
• Diagnostic trouble code “P0745 PC SOLENOID A” with CO NSULT-III or 11th judgement flicker without CON-
SULT-III is detected when TCM detects an improper volt age drop while it tries to operate the solenoid valve.
Possible CauseINFOID:0000000005928181
• Harness or connector
(The solenoid circuit is open or shorted.)
• Line pressure solenoid valve
DTC Confirmation ProcedureINFOID:0000000005928182
CAUTION:
If performing this “DTC Confirmati on Procedure” again, always turn ignition switch OFF and wait at
least 10 seconds before continuing.
After the repair, perform the following procedure to confirm the malfunction is eliminated.
WITH CONSULT-III
1. Turn ignition switch ON and select “DATA MO NITOR” mode for “TRANSMISSION” with CONSULT-III.
2. Touch “START”.
3. Depress accelerator pedal completely and wait at least 1 second.
4. If the check result is NG, go to AT-135, "
Diagnosis Procedure" .
WITH GST
Follow the procedure “WITH CONSULT-III”.
WITHOUT CONSULT-III
1. Start engine.
2. With brake pedal depressed, shift the lever from “P” →“N” →“D” →“N” →“P” positions.
3. Perform self-diagnosis. Refer to AT-82, "
Diagnosis Procedure without CONSULT-III" .
4. If the check result is NG, go to AT-135, "
Diagnosis Procedure" .
Item nameCondition Display value (Approx.)
LINE PRES DTY Small throttle opening (Low line pressure)
⇔ Large
throttle opening (High line pressure) 0%
⇔ 94%
Revision: May 2010 2011 Versa

AT-184
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS FOR SYMPTOMS
2. Check A/T fluid condition. Refer to AT-51, "Inspections Before Trouble Diagnosis" .
OK or NG
OK >> GO TO 5.
NG >> GO TO 4.
4.DETECT MALFUNCTIONING ITEM
1. Disassemble A/T. Refer to AT-257, "
Disassembly" .
2. Check the following items:
- Forward clutch assembly. Refer to AT-307, "
Forward and Overrun Clutches" .
- Overrun clutch assembly. Refer to AT-307, "
Forward and Overrun Clutches" .
- Reverse clutch assembly. Refer to AT-297, "
Reverse Clutch" .
OK or NG
OK >> GO TO 5.
NG >> Repair or replace damaged parts.
5.CHECK SYMPTOM
Check again. Refer to AT-56, "
Check at Idle" .
OK or NG
OK >> INSPECTION END
NG >> GO TO 6.
6.CHECK TCM
1. Check TCM input/output signals. Refer to AT-75, "
TCM Terminal and Reference Value" .
2. If NG, recheck TCM pin terminals for damage or loose connection with harness connector.
OK or NG
OK >> INSPECTION END
NG >> Repair or replace damaged parts.
Large Shock "N" → "R" PositionINFOID:0000000005928251
SYMPTOM:
There is a large shock when cha nging from “N” to “R” position.
DIAGNOSTIC PROCEDURE
1.CHECK SELF-DIAGNOSTIC RESULTS
Perform self-diagnosis. Refer to AT-77, "
CONSULT-III Function (TRANSMISSION)" or AT-82, "Diagnosis Pro-
cedure without CONSULT-III" .
Is any malfunction detected by self-diagnostic results?
YES >> Check the malfunctioning system. Refer to AT-77, "CONSULT-III Function (TRANSMISSION)" or
AT-82, "
Diagnosis Procedure without CONSULT-III" .
NO >> GO TO 2.
2.CHECK LINE PRESSURE
Check line pressure at idle with selector lever in “D” position. Refer to AT-51, "
Inspections Before Trouble
Diagnosis" .
OK or NG
OK >> GO TO 4.
NG >> GO TO 3.
3.DETECT MALFUNCTIONING ITEM
1. Remove control valve assembly. Refer to AT-222, "
Control Valve Assembly and Accumulators" .
2. Check the following items:
- Valves to control line pressure (Pressure regulator valve, pressure modifier valve, pilot valve and pilot fil- ter)
- Line pressure solenoid valve
- Oil pump assembly. Refer to AT-278, "
Oil Pump" .
OK or NG
Revision: May 2010 2011 Versa

TROUBLE DIAGNOSIS FOR SYMPTOMSAT-185
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OK >> GO TO 4.
NG >> Repair or replace damaged parts.
4.CHECK SYMPTOM
Check again. Refer to AT-56, "
Check at Idle" .
OK or NG
OK >> INSPECTION END
NG >> GO TO 5.
5.CHECK TCM
1. Check TCM input/output signals. Refer to AT-75, "
TCM Terminal and Reference Value" .
2. If NG, recheck TCM pin terminals for dam age or loose connection with harness connector.
OK or NG
OK >> INSPECTION END
NG >> Repair or replace damaged parts.
Vehicle Does Not Creep Backward in "R" PositionINFOID:0000000005928252
SYMPTOM:
Vehicle does not creep backwar d when selecting “R” position.
DIAGNOSTIC PROCEDURE
1.CHECK A/T FLUID LEVEL
Check A/T fluid level. Refer to AT-17, "
Checking A/T Fluid" .
OK or NG
OK >> GO TO 2.
NG >> Refill ATF.
2.CHECK LINE PRESSURE
Check line pressure at idle with selector lever in “R” position. Refer to AT-51, "
Inspections Before Trouble
Diagnosis" .
OK or NG
OK >> GO TO 4.
NG >> GO TO 3.
3.DETECT MALFUNCTIONING ITEM
1. Remove control valve assembly. Refer to AT-222, "
Control Valve Assembly and Accumulators" .
2. Check the following items:
- Valves to control line pressure (Pressure regulator valv e, pressure modifier valve, pilot valve and pilot fil-
ter)
- Line pressure solenoid valve
3. Disassemble A/T. Refer to AT-257, "
Disassembly" .
4. Check the following item:
- Oil pump assembly. Refer to AT-278, "
Oil Pump" .
OK or NG
OK >> GO TO 4.
NG >> Repair or replace damaged parts.
4.CHECK STALL REVOLUTION
Check stall revolution with selector lever in “1” and “R” positions. Refer to AT-51, "
Inspections Before Trouble
Diagnosis" .
OK or NG
OK >> GO TO 6.
OK in “1” position, NG in “R” position>>GO TO 5.
NG in both “1” and “R” positions>>GO TO 7.
5.DETECT MALFUNCTIONING ITEM
Revision: May 2010 2011 Versa